Blog

August 6
Dan Rajewski (in Ames)
Summary: Stations 1-4 operational, no ISFS staff on-site
mostly easterly to ENE flow during the night shifting to S and eventual W and slightly SW by the evening
cloudy through mid morning with clearing to partly cloudy skies by early afternoon

Vdsm: 13.4-13.7 V during day, down to 12.4 at night
P: ok, pressure mostly falling by about 4 mb through the period
T2m: stn 4 slightly cooler from 19:00-23:00, stn 1 slightly warmer from 0:00-3:00; daytime stn 4 slightly warmer than stn 2 from 14:00-15:00
RH.2m: stn 4 about 5%RH higher than the other stations most of the night and day, stn 1 slightly lower than stn 2 & 3 for the night
H2O.2m: night:  stn 4 about 0.7-1.0 g/m^3 higher than at other sites much of the night and daytime

Wetness: sensor wet from previous afternoon rainfall through about 10:00 next morning

T.10m: ok, from 21:00-23:00 stns 1 & 2 about 0.5 degrees C warmer than stns 3 & 4, from 1:00-3:00 stn1 about 0.5 degrees warmer than other sites, close daytime agreement, stn4 slightly lower in late afternoon
RH.10m: stn 2 about 7-10%RH lower than other sites at night and through late morning, stn1 few%RH lower than stn 3 & 4 for the night and early morning; day: agreement in all sites by 15:30
H2O.10m: night: stn 2 about 1.5 g/m^3 drier than other sites, stn1 slightly lower than stns 3 & 4; day: stn 2 about 0.5-1.0 g/m^3 drier than other sites until agreement with other sites reached by 15:30
Spd.10m: ok, stn 1 slightly higher than others around 0:00-2:00, otherwise close agreement among sites 
Dir.10m: ok, ESE to ENE winds overnight and veering to S by late morning, continued veering to W by late afternoon, backing to SW by end of period

T.10m - T.2m: night: fairly close agreement among all sites; day stn 4 slightly warmer at 2m vs. 10 m for mid afternoon, stn 2 slightly less negative thermal gradient during this period
H2O.10m - H2O.2m: stns 1 & 3 mostly agree for day and night, stn 2 about 1.0-1.5 g/m^3 drier at 10 m vs. 2 m much of the night and up through 14:00, close agreement with stns 1 & 3 after that; stn 4 about 0.7 g/m^3 drier at 10m vs. 2m during the night and about 1.0 g/m^3 drier at 10m vs. 2m during the day

spd.4.5m: ok, similar for Spd.10m, 
dir.4.5m: ok, see comments for Dir.10m, more E flow for first part of night compared to ESE winds at 10 m
w.4.5m: ok, not a clear separation of vertical motion among tower sites
tc.4.5m: ok, much of night stn2 about 0.3 degrees less than other sites; daytime: stn 2 slightly cooler than other sites, stns 3-4 slightly warmer than stn 1
ldiag: ok

kh2oV: ok, near 150-200 mV
kh2o: night: stn 2 about 1.5-2.0 g/m^3 wetter than at stn 4, both of these about 4-5 g/m^3 wetter than stns 1 & 3; daytime a bit closer agreement, stn 2 about 3 g/m^3 wetter than other sites
h2o(licor): ok, stn 1 about 0.5 g/m^3 drier than stn 3 from much of the night; close agreement in early afternoon
lidiag (licor): ok

TKE.4.5m: ok, slightly higher at stn1 v.s others from 0:45-1:30, otherwise the sites have overlap of TKE magnitude
w'w': ok, similar to TKE.4.5m, also in u'u' and v'v'
u*: ok, somewhat similar to TKE.4.5m, also u'w' looks like u*, v'w' has more noticeable period before midnight with stn2 about 0.02 (m/s)^2 less flux than other sites
w'tc': ok, night: close agreement; day:  fairly close agreement, stns 1 & 4 with highest peak flux for early afternoon
tc'tc': ok, similar to w'tc'
w'h2o': ok, close agreement first part of night, stn2 slightly higher than others from 1:00-6:00; daytime:  stns 2 & 4 about 0.02-0.03 g/m^2/s lower flux than sites 1 &3
h2o'h2o' (licor): ok, close agreement between stns 1 & 3
kh2o'kh2o': higher variance (somewhat short-spiked pattern) for stn2 during the late night hours; morning and afternoon; stn 2 about 0.05 g/m^2/s lower than other sites in the morning and parts of the afternoon; stn 4 also 0.05 g/m^2/s lower than Sites 1 & 3 for late afternoon
w'co2': ok, night: somewhat more positive flux at stn 1 vs. stn 3; daytime: close agreement except for mid afternoon stn 1 about 0.001 g/m^2/s larger uptake than at stn 3
co2'co2': ok, stn 1 sightly higher (5*10^-5 units) than stn 3, much of the night; values close for the day

August 5
Dan Rajewski (in Ames)
Summary: Stations 1-4 operational, no ISFS staff on-site, Russ and Dan serviced the wind cube stations around 17:00-18:00
mostly easterly flow with periods with SE or NE directions, weak speeds, cloudy skies with scattered showers and thunderstorms in the afternoon

Vdsm: 13.4-13.7 V during day, down to 12.4 at night
P: ok, pressure mostly steady until early afternoon, falling as showers and storms progress into the evening
T2m: stns mostly in agreement, but a period from 1:00 to 2:30 where stn 4 is about 0.7 degrees C cooler than other sites, stn1 also slightly cooler than other sites from early morning to evening
RH.2m: stn 4 about 5-7%RH higher than the other stations most of the night and day
H2O.2m: night:  stn 4 about 0.5-0.7 g/m^3 higher than at other sites much of the night and daytime

Wetness: slight dew from 5:00-7:00 then dry until 13:30 with thunderstorm and showers keeping sensor wet the rest of the period

T.10m: ok, before midnight stn 1 about 0.5-0.7 degrees C warmer than other sites, also from 3:00-5:00, stn3 about 0.7 degrees cooler than stns 2 & 4 from 4:30-5:30, close daytime agreement, but stn4 slightly cooler in the afternoon and early evening
RH.10m: stn 2 about 7-10%RH lower than other sites both night and day; stn 3&4 slightly higher than stn 1 most of the night
H2O.10m: night: stn 2 about 1.5 g/m^3 drier than other sites, stn1 slightly lower than stns 3 & 4; day: stn 2 about 0.5-1.0 g/m^3 drier than other sites
Spd.10m: ok, few night periods with one stn about 1.0 m/s high/lower than another with the others in between; late afternoon stn 2 slightly lower speeds than other sites  
Dir.10m: ok, NE  to SE winds during the night; E winds by early afternoon and continuing the rest of the period

T.10m - T.2m: night: stn 4 slightly warmer at 10 m vs. 2 m from 1:00-2:00 , close morning and afternoon agreement
H2O.10m - H2O.2m: stns 1 & 3 mostly agree, stn 2 about 1.0-1.5 g/m^3 drier at 10 m vs. 2 m much of the night and daytime; stn 4 about 0.7 g/m^3 drier at 10m vs. 2m during the night and  and about 1.0 g/m^3 drier at 10m vs. 2m during the day

spd.4.5m: ok, similar for Spd.10m, a few more night periods where stn 1 is a bit higher speed than other sites, with stn 3 also having the lowest speed
dir.4.5m: ok, see comments for Dir.10m, slightly more NNE wind at stn 3 during the 20:00-1:00, then a bit more veering (~E) at stns 2 & 3 than the other sites until sunrise
w.4.5m: ok, not a clear separation of vertical motion among tower sites
tc.4.5m: ok, much of night stn2 about 0.3 degrees less than other sites, stn1 slightly warmer than others; daytime:  stn 2 slightly cooler than other sites, stn3 slightly warmer than stns 1 & 2
ldiag: ok

kh2oV: ok, for rain-free periods (near 150-200 mV); during rain, voltage went to 0  
kh2o: night: poor response until early morning, stn 4 about 0.5 g/m^3 wetter than stn 2 both of those about 0.5-1.0 g/m^3 more moist than Sites 1 & 3, afternoon rain muddles the signal as in the licor
h2o(licor): ok, stn 1 about 0.5 g/m^3 drier than stn 3 from much of the night; close agreement in afternoon, but also separation spikes caused by rainfall
lidiag (licor): expected spikes in the data during/after rain event

TKE.4.5m: ok, few night periods (right after sunset, few hrs before sunrise) where stn 1 is slightly higher than others, with stns 2 &3 slightly lower than stn 4
w'w': ok, similar to TKE.4.5m, also in u'u' and v'v'
u*: ok, not similar to TKE.4.5m,
w'tc': ok, night: stns within 0.01 m/s C of each other, close morning agreement, stn3 slightly warmer during early afternoon
tc'tc': ok,, few night periods with stn 1 higher than other sites but not at same time as for these features in wind or TKE, close daytime agreement, stn4 slightly higher than others for late afternoon/evening  
w'h2o': ok, poor response from stn2 & 4 with the krypton voltage so low during the night; late morning/early afternoon before rain: slightly higher positive flux at stn 1 & 3 vs. site 4, stn4 a bit higher also than stn 2
h2o'h2o' (licor): ok, close agreement except after the rain event
kh2o'kh2o': anomalous readings during the night and late afternoon, otherwise for the morning stns 2 & 4 are close to 1 & 3
w'co2': ok, night: more positive flux at stn 1 vs. stn 3, from 20:00-midnight, and from 2:30-5:00; daytime before the rain: close agreement; stn 1 a bit lower than stn 3 during rain but than for evening stn 3 lower than Site 1
co2'co2': ok, few spikes in overnight, stn 1 sightly higher than at stn 3, more rain-induced spikes in the afternoon, larger intensity at stn 1 vs. stn 3 though

August 4 21:50 CDT
Dan Rajewski (in Ames)

Summary: Stations 1-4 operational, no ISFS staff on-site, Russ and Dan restarted the south wind cube around 16:45-17:00;
night: NE to E flow, partly to mostly cloudy skies, thunderstorm passage around 11:30-14:00, E to ENE winds through the evening
**watch krypton voltage for tomorrow, after rainstorm voltage remains zero at sites 2 & 4

Vdsm: 13.4-13.7 V during day, down to 12.4 at night
P: ok, pressure rising 2 mb during the night through early afternoon, falling back 2mb from heavy thunderstorm and remaining steady after that
2m: night: stn 1 & 3 slightly warmer than stn 4, about 0.7-1.0 degrees C warmer than stn 2 much of the night; late afternoon stn 4 is slightly lower than other sites
RH.2m: stn 4 about 7%RH higher than stn 1 & 3 only a few%RH higher than stn 2; daytime stn 4 about 5%RH higher than other sites
H2O.2m: night:  stn 4 about 0.5-0.7 g/m^3 higher than at other sites much of the night, stn 2 slightly drier than other sites around midnight and 3:00; stn 4 about 0.7 g/kg more moist than other sites during the day

Wetness: slight dew from 2:00-3:00 then dry until 11:30 with thunderstorm and shower activity keeping sensor wet until 19:00 

T.10m: ok, similar to pattern at T.2m during the night, stns within +/- 0.25 degrees C during the day
RH.10m: stn 2 about same as other sites from 19:00-0:00 then after 3:00 and continuing into the daytime stn2 about 7-10%RH lower than other sites; stn 3 slightly higher than stns 1 & 4 most of the night, stn 1 few%RH lower than sites 3 & 4 during the afternoon
H2O.10m: night: stn 4 about 0.7 g/m^3 wetter than other sites, stn 2 slightly drier than stns 3 & 4 from 23:00-0:00 and from 2:30-4:00; day:  stn 4 about 0.7-1.0 g/m^3 more moist than other sites
Spd.10m: ok, from 19:00-midnight stn 1 about 0.7-1.0 m/s higher than stns 3 & 4, 1.0-1.5 m/s higher than stn 2,  similar but less strong pattern until 4:30; good daytime agreement 
Dir.10m: ok, mostly NE during the night to ENE by sunrise, E winds much of the morning and afternoon (except during rain period around 1:00-2:30...veering to S and back to E), ENE winds in the evening

T.10m - T.2m: night: all stns have similar thermal gradients within 0.5 degrees C of the others, early morning stn3 slightly warmer at 2m vs. 10 m, closer agreement in afternoon-evening
H2O.10m - H2O.2m: stns 1 & 3 mostly agree, stn 2 about 1.0-1.5 g/m^3 drier at 10 m vs. 2 m much of the night and about a 2.0 g/m^3 difference during the daytime; stn 4 about 0.7-1.0 g/m^3 drier at 10m vs. 2m during the night and daytime

spd.4.5m: ok, similar for Spd.10m
dir.4.5m: ok, see comments for Dir.10m, slightly more NNE wind at stn 3 during the 20:00-1:00, then a bit more veering (~E) at stns 2 & 3 than the other sites until sunrise
w.4.5m: ok, slightly more w>0 at stn 3 and stn 2 vs. near zero for stn 4 and w<0 for stn 1 during the first part of the night up until 2:00
tc.4.5m: ok, see comments for T.2m, stn 2 about 1.0-1.5 degrees C cooler than other sites from 2:00-4:00
ldiag: about 500 missing samples from stns 1 & 3 during rain storm, less samples lost at stn 4 during the same period

kh2oV: ok over night and through late morning (btwn 400-600 mV), afternoon and evening, no voltage response from wet sensors 
kh2o: night: stns 2 & 4 close to stn 1, day: stns 2 & 4 about 0.5-1.0 g/m^3 drier than stn 1; poor response during/after rain storm 
h2o(licor): ok, stn 1 about 0.7 g/m^3 drier than stn 3 from much of the night; stn 1 about <0.5 g/m^3 drier than stn 3 in the morning period; rain muddles differences the rest of the afternoon
lidiag (licor): expected spikes in the data during/after rain event

TKE.4.5m: ok, stn 1 about 0.1 units higher than stns 3 & 4 and 0.15 units higher than stn 2 from 20:00-0:00 and from 2:00-4:00
w'w': ok, similar to TKE.4.5m, also in u'u' and v'v'
u*: ok, stn 1 higher u* by ~0.10-0.15- m/s than at stn 2, other sites about 0.05-0.1 m/s less than stn 1 for similar periods noted in TKE.4.5m, also seen in u'w' and v'w'
w'tc': ok, night: stn 1 about 0.02 to 0.03 m/s C larger negative flux than stn 2, other sites in between 1 & 2, close daytime agreement except during rain-spikes
tc'tc': ok,, stn 1 higher variance than other sites from 23:00-1:30 and from 2:00-4:00, about 0.04-0.10 C^2 more than at stn 2, close daytime agreement except during/after rain event
w'h2o': ok, slightly higher positive flux at stn 1 & 3 vs. site 4 about 0.006 g/m^2/s higher at stn 1 than at Site 2
h2o'h2o' (licor): ok, , few spikes at stn 3 during night, close agreement before rain storm and again in late afternoon
kh2o'kh2o': stn 2 slightly lower than other sites during the night before 1:00; stns 2 & 4 slightly higher than 1 & 3 from 5:00-7:00, anomalous readings from the rain event are continuing through early evening
w'co2': ok, night: more positive flux at stn 1 vs. stn 3, from 20:00-midnight, rest of night and daytime before the rain: close agreement
co2'co2': ok, few spikes in overnight, stn 1 sightly higher than at stn 3 from 21:00-1:00, more rain-induced spikes in the afternoon

August 3 17:18 CDT
Dan Rajewski (in Ames)

Summary: Stations 1-4 operational, no ISFS staff on-site
light to moderate northerly flow with clear skies or a few clouds; drier and less warm

Vdsm: 13.4-13.7 V during day, down to 12.4 at night
P: ok, pressure rising from 969 to 974 mb during the night and morning, falling a few mb in the afternoon
T.2m: night: stn 1 slightly warmer than other sites before midnight, closer agreement until sunrise, daytime values are also similar between sites
RH.2m: stn 4 about 5%RH higher than stn 1 other sites a few% RH higher than stn 1 during the night; for morning stn 4 is consistently a few%RH higher than other sites before inversion breakup and also in late afternoon
H2O.2m: night:  stn 4 about 0.7 g/m^3 higher than at other sites much of the night from 22:00-7:00; during and after inversion breakup: stn 4 about 0.5-0.7 g/m^3 more moist than other sites

Wetness: very little voltage detected but some rise btwn 6:00-7:00

T.10m: ok, similar to pattern at T.2m
RH.10m: most of night and early morning: stn 2 about 10 %RH lower than the other sites, stn 1 about few%RH lower than stns 3-4; all sites have close agreement after inversion breakup
H2O.10m: night: stn 2 about 1.0-1.5 g/m^3 drier than other sites, stn 1 slightly drier than stns 3 & 4; stn 2 delayed agreement with other sites by 9:30
Spd.10m: ok, stn 1 most of the night about 0.7-1.0 m/s higher than other sites except for agreement around 3:00-4:30, stn 4 slightly higher speed than at stns 2-3, day: good agreement 
Dir.10m: ok, mostly NNW to N before 9:00, variable directions around North the rest of the period

T.10m - T.2m: night: all stns have similar thermal gradients, early-late afternoon stn 4 slightly warmer at 2 m vs. 10m than at other sites
H2O.10m - H2O.2m: near zero gradient much of the night at Sites 1 & 3, stn 4 about 1.0 g/m^3 less vapor at 10m vs. 2m, and stn 2 about 2.0 g/m^3 less at 10m. vs. 2m; late morning through early afternoon stn 4 is about 1.0 g/m^3 more vapor at 2 m vs. 10 m than for other sites

spd.4.5m: ok, similar for Spd.10m
dir.4.5m: ok, see comments for Dir.10m
w.4.5m: ok, slightly more w>0 at stn 3 vs. near zero for stns 1-2, w<0 for stn 4 (afternoon signal, not as clear during the night)
tc.4.5m: ok, see comments for T.2m
 
ldiag: several night periods with missing samples (up to 300 samples per avg. period at stn 4), also spikes at stn2 from 19:00-20:00
kh2oV: ok, stns 2 & 4 btwn 300-500 mV 
kh2o: night: stn 4 about 0.5 g/m^3 more moist than stn 2, both sites are about 1.0 g/m^3 drier than stns 1 &3 except for period from 4:00-6:00; daytime stns 2 & 4 are still about 2 g/m^3 less than stns 1 & 3 
h2o(licor): ok, stn 1 about 0.5-0.7 g/m^3 drier than stn 3 from 20:00-9:00; after inversion breakup sites 1 & 3 are within +/- 0.5 g/m^3 of each other
lidiag (licor): a few spikes in data especially in stn3 around sunrise

TKE.4.5m: ok, most of night stn 1 about 0.15-0.2 m^2/s^2 higher TKE than other sites except from 4:00-6:00
w'w': ok, similar to TKE.4.5m, also in u'u' and v'v'
u*: ok, stn 1 higher u* by ~0.07 m/s as similar to TKE.4.5m before midnight; also seen in v'w' but not u'w', sites mostly in agreement after 2:00

w'tc': ok, night: stn 1 about 0.01 to 0.02 m/s C larger negative flux than other sites; afternoon stns 1-2 peak flux similar or slightly higher than at stn 3, stn 4 a bit lower than stn 3
tc'tc': ok 
w'h2o': ok, before midnight: slightly higher positive flux at stn 1 vs. other sites, otherwise close agreement; daytime, peak flux at stn 3 a bit higher (0.01-0.02 g/m^2/s) than at Sites 1-2,4
h2o'h2o' (licor): ok, , few spikes at stns 1 & 3 during night, close agreement btwn Sites for night and day
kh2o'kh2o': stn 4 about 0.0025 (g/m^3)^2 more variance than other sites from 0:00-4:00; stns 2 & 4 are 0.4 (g^m^3)^2 lower than other stations in late morning to afternoon
w'co2': ok, night: more positive flux at stn 1 vs. stn 3, day: close agreement; most of morning stn 1 slightly higher co2 uptake than stn 3
co2'co2': ok, several spikes in overnight, stn 1 sightly higher than at stn 3 from 21:00-1:00, sites mostly in agreement during the daytime

Jimmy and Dan serviced ncar2 and ncar4 for krypton cleaning.  Dan also checked the bug screens for the 2m TRH inlets at stns 1 & 3

Here is a time line of the station visits

ncar 2 

10:05 begin mast take down

10:25 clean sensor

10:40 complete raising the mast

** Jimmy cleaned a few small gnats off of the bug screen for the 2mTRH inlet

**very dry soil along path to north windcube, 1.5" cracks in the soil, 6" deep, several winged grasshoppers along the path to ncar2

(soil not as dry for south wind cube, no grasshoppers sited)

ncar 4

11:10 being lowering mast

11:25 clean sensor

11:40 mast raising is finished

**No bugs on the screen for the 2mTRH

**only a few hoppers along the path to ncar4

ncar 3

12:00-12:10 visited the site and cleaned two moths out from the inside of the screen.

2mTRH fan was still operational, so no repair was needed

 Tom confirmed that the temp data was in better agreement after the pre-sunrise hours of Aug. 2

**soil also starting to develop cracks but not as severe as in the pathway to ncar2.

ncar 1

12:35-12:36

quick check of the inlet screen and no bugs were present on or inside the screen

**very few grasshoppers seen on the path to the site

August 2 15:14 CDT
Dan Rajewski (in Ames)

Summary: Stations 1-4 operational, Jimmy and Dan visited the sites to clean krypton sensors at stn 2 & 4 and check bug screens on the 2m TRH inlets at all the sites
**Stn 3 T.2m appears to be back in agreement with other sites as of 0:00 overnight (two moths were in the screen underneath the inlet tube and were removed around 12:05)
Cold Front passage at 11:00, strong southerly flow and likely nighttime jet replaced by more gusty westerly and north-westerly wind
(Turbines at 9:00 were completing one revolution every 3 sec, before inversion breakup completed, one revolution took about every 6 sec around 10:30)

Vdsm: 13.4-13.7 V during day, down to 12.4 at night
P: ok, pressure falling from 973-967 mb during the night and up to 11:00, steady after that
T.2m: night: stn 1 about 1.0 degrees cooler than stn 3 1-2 hrs before midnight, other sites in between 1 & 3; stn 4 about 0.5 degree C cooler than other sites from 1:00 to 8:00; good agreement after inversion breakup completed
RH.2m: stn 4 about 3-7% RH higher than other sites much of the night and morning; stn 3 about 5%RH lower than stns 1-2 from 21:00-0:00; late morning stn 4 about few%RH higher than other sites
H2O.2m: night:  stn 4 about 1.0 g/m^3 higher than at other sites much of the night from 22:00-7:00; during and after inversion breakup: stn 4 about 0.5-0.7 g/m^3 more moist than other sites

Wetness: dew event from 21:30 to 1:00, sensor mostly dry by 3:00 but completely dry by 13:00 (small lingering moisture effects?)

T.10m: night: stns mostly in agreement during the night, from 22:30-23:30 site 3 about 0.7 degrees C warmer than stn 1, other sites in between; good agreement between sites during daytime hours
RH.10m: most of night and early morning: stn 2 about 10 %RH lower than the other sites (is this a unphysical signal?), yet all sites have close agreement after inversion breakup
H2O.10m: night: stn 2 about 1.0-1.5 g/m^3 drier than other sites, stn 1 slightly drier than stns 3 & 4; stn 2 delayed agreement with other sites 9:00, stns 1,3-4 agree by 7:30
Spd.10m: ok, stn 1 most of the night about 0.5-1.0 m/s lower than other sites except for agreement around 1:00-2:00, stn 3 also slightly lower than stns 2 & 4 during much of the night; good daytime agreement (also see when towers at Sites 2 & 4 were lowered)
Dir.10m: ok, mostly SSE before 1:00 and near S from then until 1 hr after sunrise, then SW by 10:30, WSW by 11:00 (inversion breakup completed) and W to WNW by mid afternoon, trending to NW by early evening

T.10m - T.2m: night: stn 4 sometimes slightly warmer at 10 m vs. 2 m;  early afternoon stn 4 slightly warmer at 2 m vs. 10m than at other sites
H2O.10m - H2O.2m: near zero gradient much of the night at Sites 1 & 3, stn 4 about 1.0 g/m^3 less vapor at 10m vs. 2m, and stn 2 about 1.50-2.0 g/m^3 less at stn 2 vs. stn 4; late morning through early afternoon stn 4 is about 2.0 g/m^3 more vapor at 2 m vs. 10 m than for other sites

spd.4.5m: ok, similar for Spd.10m, wind around 2-3 m/s (except at stn 1) most of the night; good daytime agreement
dir.4.5m: ok, see comments for Dir.10m, more SE to SSE wind during the night than at 10m, SSW by 11:00 and WSW by 12:00, W by 13:30, also will be trending NW or WNW by early evening
w.4.5m: ok, no clear pattern stands out among sites, but variations between sites do occur and change in time
tc.4.5m: ok, night: from 22:30-23:30 stns 1-2 are about 1.0 degrees C cooler than stn 3 and about 0.7 degrees C cooler than stn 4, rest of night most stns are less than +/- 0.5 degrees C; late morning and afternoon stns 1-2 slightly lower temperature than at Sites 3-4
 
ldiag: ok, 300 samples missing at Site 4 during the night, less than 100 samples missing with sites 1 & 3
kh2oV: stns 2 & 4 50-70mV during the night, around 100-150mV before lenses were cleaned, peak voltage of ~250mV, back down to 150-175 mV by late afternoon
kh2o: stn 4 about 1.5 g/m^3 more moist than stn 2 and about 3.5-4.0 g/m^3 wetter than stn 1 &3 during night; closer agreement between Sites 2 & 4 after lens cleaning but readings are still 2 g/m^3 drier than at stns 1 & 3 
h2o(licor): ok, stn 1 about 0.5-0.7 g/m^3 drier than stn 3 from 22:00-9:00; after inversion breakup sites 1 & 3 are within +/- 0.5 g/m^3 of each other
lidiag (licor): ok, no spikes in data

TKE.4.5m: ok, most of night stn 1 about 0.1-0.15 m^2/s^2 less TKE than other sites except from 1:00-2:30, stn 2 & 4 slightly more TKE than stn 3 most of the night
w'w': ok, similar to TKE.4.5m, also in u'u' and v'v'
u*: ok, stn 1 reduced u* by ~0.1 m/s as similar to TKE.4.5m, slightly less also at stn 3 from 2:30-4:00,  also seen in v'w', but not in u'w'

w'tc': ok, night: stn 4 about 0.02 to 0.05 m/s C larger negative flux than stn 1, other sites in between 1 & 4;  mid morning stns 1-2 slightly less positive flux than stns 3 & 4; afternoon stn 3 peak flux a bit higher (0.02 m/s C) than other sites
tc'tc': ok, night: higher variance at stns 3-4 vs. stns 1-2 from 21:00-0:00 after that about same variance scatter at all sites; mid morning stn 3 about 0.02 C^2 more than at stns 1 -2, stn 4 in between, close agreement after 11:30 with the frontal passage 
w'h2o': ok, overnight: stn 3 about 0.004 g/m^2/s higher positive flux before midnight than at other sites, after 1:00 stns 1 & 3 are about 0.002 g/m^2/s greater than stns 2 & 4 has similar positive flux to stn 3 & 4 during 23:00-1:00 about 0.005 g/m^2/s higher than at site 1, daytime: stns 1 &3 about 0.04-0.06 g/m^2/s larger positive flux than other sites
h2o'h2o' (licor): ok, , few spikes at 1 during night, before midnights stn3 slightly higher variance than stn 1 after 2:00, pattern reverses; stn 1 & 3 in close agreement during daytime
kh2o'kh2o': stn 4 about 0.3 (g/m^3)^2 more variance than other sensors firs half of the night then down to 0.005 unit variability; spikes during tower maintenance; also spikes but closer to sunrise event when reading is stable at Sites 1 & 3, also these sites are 0.4-0.6 (g^m^3)^2 lower than other stations in late morning to afternoon
w'co2': ok, night: slightly more positive flux at stn 1 vs. stn 3, day: close agreement; maybe some greater variability at stn 3 vs. stn 1
co2'co2': ok, several spikes in overnight, stn 1 sightly higher than at stn 3 from 20:30-1:00, and from 3:00-6:00, similar agreement in morning, slightly higher variance at stn 3 after frontal passage

August 1 22:00 CDT
Dan Rajewski (in Ames)

Summary: Stations 1-4 operational, no ISFS staff on site
overnight fog and dew; daytime partly cloudy hot and humid with light to moderate winds in the afternoon,
Few sensors with anomalous readings during very wet periods at night and early morning
**2m TRH fan likely malfunctioned at ncar3, temp reading about 2-3 degrees warmer than other sites...should be replaced by Tuesday mid-late morning
** Krypton voltage seems a bit low, also schedule lowering of masts to clean the sensors at ncar2 and ncar4

Vdsm: 13.5-13.7 V during day, down to 12.4 at night
P: ok, pressure steady much of overnight, falling 4 mb through the afternoon
T.2m: night: stn 1 & 4 about 1.0 degree C cooler than 2 & 3 from 23:00-3:00, from 3:00 to 6:00 Sites 1 & 2 about 1.0 degrees cooler than 3 & 4; fan at stn 3 likely malfunctioned around 8:00 (~2-3 degrees C higher than other sites)  
RH.2m: stn 4 longer period of saturation, stn 2 reaches 100% RH 4 hrs later and Sites 1 & 3 6 hrs later than stn 2, daytime: stn 1 &2 in close agreement about 5%RH lower than stn 4 and 10%RH higher than stn 3 (due to broken fan?)
H2O.2m: night:  stn 1 about 1-1.5 g/m^3 less than stn 2 &3, stn 4 sometimes 0.5 g/m^3 greater than sites 2 & 3; day stn 4 about 1.5-2.0 g/m^3 more moist than other sites, stn 1 & 2 slightly drier than stn 3

Wetness: heavy dew event from 20:00 to 7:00, sensor dry by 9:45

T.10m: night: similar pattern to T.2m, good agreement between sites during daytime hours
RH.10m: most of night and early morning: stn 2 about 10 %RH lower than the other sites (is this a unphysical signal?), yet all sites have close agreement after inversion breakup
H2O.10m: night: stn 2 about 1.0-1.5 g/m^3 drier than other sites, stn 1 slightly drier than stns 3 & 4; day during fog break up stn 2 about 0.7-1.0 g/m^3 drier than other sites, stn 2 delayed agreement with other sites 11:30, stns 1,3-4 agree by 9:00
Spd.10m: ok, most sites within +/- 0.5 m/s of each other during the night and daytime
Dir.10m: ok, mostly SE to S wind at night, S wind around sunrise backing to SE by 9:00, back to S/SSE rest of the afternoon and early evening

T.10m - T.2m: night: stn 4 sometimes 0.7 degrees C warmer at 10 m vs. 2 m, other times stns 1 & 2 slightly warm at 10m vs. 2m few hrs. before sunrise; good daytime agreement except for the lack of aspiration at 2m TRH at Site 3
H2O.10m - H2O.2m: from 21:00-6:30 stn 2 about 1.0 g/m^3 more vapor at 2m than 10 m, stn 4 near zero gradient in vapor, stn 1 & 3 slightly wetter at 10 m vs. 2m; good daytime agreement except for at Site 3

spd.4.5m: ok, similar for Spd.10m, wind around 1-1.6 m/s most of the night, about 2.5-3.0 m/s during the day
dir.4.5m: ok, see comments for Dir.10m, more E to SE wind during the night than at 10m, SSE to SE during the day
w.4.5m: ok, stns 1 & 3 more positive velocity at night vs. stn 4 slightly negative, stn 2 mostly near zero
tc.4.5m: ok, night: several periods when stn 1 is 1.0 degrees C cooler than other sites, stn 2 also following stn 1 pattern from 3:00-5:30, late afternoon slightly lower temperature at stns 1 & 2 vs. 3 & 4
 
ldiag: ok, few 100 samples missing at Site 3 during the night
kh2oV: stns 2 & 4 above 100mV before fog/dew dropping to 55-60mV, recovering to above 70-80mV after the inversion breakup
kh2o: stn 4 about 1.5 g/m^3 more moist than stn 2 and about 4 g/m^3 wetter than stn 1 & 3 during night; closer agreement at stn 2 in the daytime after the inversion breakup, stn 4 about 2.0 g/m^3 more vapor than stns 1 & 3
h2o(licor): ok, stn 1 about 1.0 g/m^3 drier than stn 3; during and after inversion breakup sites 1 & 3 are within +/- 0.5 units of each other
lidiag (licor): ok, few spikes corresponding to effect with dew/fog; no fictitious response in the afternoon

TKE.4.5m: ok, most of night stn 1 about 0.1-0.15 m^2/s^2 less TKE than other sites, sometimes 0.2-0.25 units less than at stn 4; good daytime agreement
w'w': ok, similar to TKE.4.5m, also in u'u' and v'v'
u*: ok, stn 1 less reduced u* by 0.1-0.15 m/s as similar to TKE.4.5m, also seen in u'w' and in v'w'

w'tc': ok, night: stn 4 about 0.02 m/s C larger negative flux than stn 1, other site in between 1 & 4;  afternoon stn 3 peak flux a bit higher (0.02 m/s C) than other sites
tc'tc': ok, night: higher variance at stns 3 & 4 vs. stn 1 and sometimes 2 except after 4:00, then sites have about same intensity; daytime: stns 4 & 3 a bit higher peak variance than other sites
w'h2o': ok, overnight: stn 3 has similar positive flux to stn 3 & 4 during 23:00-1:00 about 0.005 g/m^2/s higher than at site 1, rest of night close agreement with 1 & 3, 2 & 4 about 0.01-0.03 units more negative flux than others; afternoon less positive flux (by ~0.07-0.08 g/m^2/s) at stns 2 & 4 vs. stns 1 & 3
h2o'h2o' (licor): ok, , few spikes at both 1 & 3 during night; stn 1 & 3 in close agreement during daytime
kh2o'kh2o': stn 2 & 4 also spikes but closer to sunrise event when reading is stable at Sites 1 & 3, also these sites are 0.7-1.0 (g^m^3)^2 lower than other stations in late morning to afternoon
w'co2': ok, night: slightly more positive flux at stn 1 vs. stn 3, day: no real difference between sites
co2'co2': ok, several spikes in overnight, stn 1 sightly higher than at stn 3 from 23:00-2:30, and from 3:00-6:00

July 31, [Aug 1 9:46 CDT]

Dan Rajewski (in Ames)

Summary: Stations 1-4 operational, no ISFS staff on site
overnight dew and light fog; daytime partly cloudy warm and humid with light to moderate winds,
Few sensors with anomalous readings during very wet periods at night and early morning

Vdsm: 13.5-13.7 V during day, down to 12.4 at night
P: ok, pressure rising 3mb during the night, falling around 3mb during the afternoon

T.2m: night: several periods from 21:00-3:00 where stn 4 about 0.7 to 1.0 degree C cooler than other sites; day stn 3 a bit warmer than other sites during the mid-late afternoon     
RH.2m: stn 2 & 4 few% RH higher than other sites during the night, all sites reach saturation by 6:00; late morning to afternoon 5-7%RH higher at stn 4 than other sites
H2O.2m: night:  stns within +/- 0.5 g/kg of each other , daytime stn 4 about 1.0-1.5 g/m^3 greater vapor than the other sites

Wetness: heavy dew event from 20:00 to 7:30, sensor dry by 9:30

T.10m: night: mostly in agreement, few periods where stn 2 is 0.7-1.0  degrees C cooler than other sites from 1:00-2:00 ; good daytime consistency
RH.10m: most of night and early morning: stn 2 about 10 %RH lower than the other sites, close agreement after inversion breakup
H2O.10m: night: stn 2 about 1.0 g/m^3 drier than other sites; daytime during fog break up stn 2 about 0.7-1.0 g/m^3 drier than other sites, stn 2 delayed agreement with other sites 10:00, stns 1,3-4 agree by 9:00

Spd.10m: ok, few periods with stn 2 about 0.7-1.0 m/s lower than other sites from 21:00 to 2:00, stn 4 about 1.0 m/s lower than other sites for much of morning-early evening

Dir.10m: ok, mostly SE to S wind at night, WSW wind around sunrise backing to S by 13:00, slight SSE by end of period

T.10m - T.2m: night: stn 2 sometimes 0.7 degrees less warm at 10 m vs. 2 m than for other sites, day: stn 3 about 0.5 degrees warmer at 2m vs. 10 m during the day
H2O.10m - H2O.2m: from 23:00-9:00 stn 2 about 1.0 g/m^3 more vapor at 2m than 10 m, other stns near zero gradient in first few hours up to 2:00, then 2.0 g/m^3 wetter at 10 m vs. 2 m, then dropping to negative gradient after 7:30; much of afternoon stn 4 is 1.0-1.5 g/m^3 less vapor at 10 m than 2m vs. other sites

spd.4.5m: ok, similar for Spd.10m, but less magnitude of difference among sites
dir.4.5m: ok, see comments for Dir.10m, more E to SE wind during the night than at 10m
w.4.5m: ok, stns 1, 2 & 3 more positive velocity at night vs. stn 4 slightly negative, stn 1 has slight switch from positive to negative around 2:00-3:00 and back to w>0 after that
tc.4.5m: ok, night: several short periods where one stn is about 1.0 degrees C warmer than other sites,late afternoon slightly lower temperature at stns 1 & 2 vs. 3 & 4
 
ldiag: ok
kh2oV: stns 2 & 4 above 100mV before fog/dew dropping to 60-90mV, recovering to above 100-120mV after the inversion breakup
kh2o: stn 2 & 4 about 2.0-2.5 g/m^3 more moist than stns 1 & 3 during night; closer agreement at stn 2 in the daytime after the inversion breakup, stn 4 about 2.5 g/m^3 more vapor than stns 1 &3
h2o(licor): ok, good nighttime agreement, few spikes caused by dew/fog, afternoon: stn 1 & stn 3 in good agreement
lidiag (licor): ok, few spikes corresponding to effect with dew/fog; no fictitious response in the afternoon

TKE.4.5m: ok, mostly in agreement from 23:30-0:30 stn 2 is about 0.05 m^2/s^2 more than other sites; similar values at all sites during and after the inversion breakup
w'w': ok, similar to TKE.4.5m, also in u'u' and v'v'
u*: ok, not as similar to TKE4.5m, nor in u'w', but some pattern seen in v'w' close to TKE 4.5m

w'tc': ok, heat flux differences are not easily seen during the nighttime;  afternoon stn 3 peak flux a bit higher (0.02-0.03 m/s C) than other sites
tc'tc': ok, night: no clear pattern to link the TKE.4.5m; few spikes at stns 2 & 4 at 21:00 and at 3:30 and 4:15; good agreement among sites in daytime, slightly lower variance at stn 2 from 15:00-17:00

w'h2o': ok, overnight: mostly near zero except for a few hours before sunrise with stn 2 & 4 with largest negative flux; afternoon less flux (by ~0.06 g/m^2/s) at stns 2 & 4 vs. stns 1 & 3
h2o'h2o' (licor): ok, , few spikes at both 1 & 3 during night; stn 1 & 3 in close agreement during daytime
h2o'kh2o': stn 2 & 4 also spikes but closer to sunrise event when reading is stable at Sites 1 & 3, also these sites are 0.7-1.0 (g^m^3)^2 lower than other stations in late morning/early afternoon
w'co2': ok, no real difference between sites
co2'co2': ok, several spikes in overnight, stns 1 & 3 mostly the same but a few periods where stn 1 slightly more than at stn 3; good daytime agreement

Russ, Jimmy, and Dan visited the CWEX stations on July 29 to install some bug shields on the inlet bells of the 2m TRH sensors. 

The shields consist of gray colored fiberglass screen cut in about 18 X 18 in square.  

The corners of the square were grabbed together as the middle of the screen was positioned over the inlet and one thick rubber band was adequate to secure the screen corners around the outside wall of the inlets.

Here is a time-line of the visits (all times in CDT).

ncar2  10:40-10:50  (extra time to make the prototype and cut extra screens)

ncar1  11:26-11:28

ncar3  11:43-11:44

ncar4  11:48-11:49

July 30, 14:05 CDT

Dan Rajewski (in Ames)

Summary: Stations 1-4 operational, no ISFS staff on site
overnight fog and dew; daytime partly cloudy warm and humid with light to moderate winds,
Few sensors with anomalous readings during very wet periods at night and early morning

Vdsm: 13.5-13.7 V during day, down to 12.4 at night
P: ok, pressure rising 3mb during the night, falling around 3mb during the afternoon

T.2m: night: stn 4 has some spikes during the overnight; otherwise stn 1 & 4 about 0.7-1.0 degree C cooler than stns 2 & 3 from 23:00-3:00; from 22:00-23:00 and 3:00-6:00 stn 2 & 3 about 0.5-0.7 C cooler than stns 1 & 4
     
RH.2m: stn 2 & 4 few% RH higher than other sites during the night, daytime after the fog breakup: stn 4 about 5% RH higher than other sites
H2O.2m: similar pattern at T.2m, during night 23:00-3:00 period stn 2 & 3 1.0 g/m^3 more wet than stns 1 & 4, daytime: stn 4 about 0.7 g/m^3 more moist than other sites

Wetness: heavy dew event from 20:00 to 7:00, sensor dry by 9:45

T.10m: all stns mostly within +/- 0.5 degrees C of each other
RH.10m: most of night and early morning: stn 2 about 10 %RH lower than the other sites
H2O.10m: night: stn 2 about 1.0 g/m^3 drier than other sites; daytime during fog break up stn 2 about 0.7-1.5 g/m^3 drier than other sites, stn 1 & 2 delayed agreement with other sites 10:00, stns 3 & 4 agree by 8:00

Spd.10m: ok, few periods with stn 2 about 0.7-1.0 m/s lower than other sites from 23:00 to 2:00

Dir.10m: ok, mostly SE to S wind at night, E wind around sunrise veering to S by 11:00

T.10m - T.2m: night all stns within a 0.5 degrees of other except during 0:30-3:00 stn 1 & 3 about 1.0 degree C warmer at 10 m vs. 2 m than for stn 2, early-mid morning stns 1-3 about 0.5 degrees C warmer at 10 m vs. 2m than site 4
H2O.10m - H2O.2m: from 23:00-9:00 stn 2 about 1.0 g/m^3 more vapor at 2m than 10 m, other stns about 1.0 g/m^3 more vapor at 10 m than 2m, day: stn 4 about 1.0 g/m^3 less vapor at 10 m than 2m vs. other sites

spd.4.5m: ok, similar for Spd.10m, but not exactly the same pattern from 2:00-4:00
dir.4.5m: ok, see comments for Dir.10m, more E to SE wind during the night than at 10m
w.4.5m: ok, stns 1, 2 & 3 more positive velocity at night vs. stn 4 slightly negative, stn 2 has slight switch from positive to negative around 2:00-3:00 and back to w>0 after that
tc.4.5m: ok, night: several short periods where one stn is about 1.0 degrees C warmer than other sites
 
ldiag: ok, less than 100 samples missing at a few sites during the overnight
kh2oV: stns 2 & 4 above 100mV before fog/dew dropping to 50mV, recovering to above 120-150mV after the inversion breakup
kh2o: stn 2 & 4 about 2.0-2.5 g/m^3 more moist than stns 1 & 3 during night, several spikes and high anomalous values during fog/dew; closer agreement at stn 2 in the daytime after the fog breakup, stn 4 about 3.0 g/m^3 more vapor than stns 1 &3
h2o(licor): ok, good nighttime agreement, few spikes caused by dew/fog, afternoon: stn 1 & stn 3 in good agreement
lidiag (licor): ok, few spikes corresponding to effect with dew/fog; no fictitious response in the afternoon

TKE.4.5m: ok, mostly in agreement few night periods where stn 2 is about 0.1 m^2/s^2 more than other sites; similar values at all sites during and after the inversion breakup
w'w': ok, similar to TKE.4.5m, also in u'u' and somewhat in v'v'
u*: ok, similar to TKE4.5m, similar pattern also somewhat in u'w' and v'w'

w'tc': ok, higher TKE at stn 1 corresponds to somewhat more negative heat flux, close agreement in morning and afternoon, stn 3 peak flux a bit higher than other sites
tc'tc': ok, night: stn 1 has most periods with the least variance except for 4:00-5:00 period; good agreement among sites in daytime

w'h2o': ok, overnight: several spikes at all sites noted, negative flux at stns 2 & 4 seems anomalous behavior; afternoon less flux (~0.1 g/m^2/s) at stns 2 & 4 vs. stns 1 & 3
h2o'h2o' (licor): ok, during night but otherwise stn 1 & 3 in close agreement at these sites
h2o'kh2o': stn 2 & 4 more anomalous high variances (in between 'spike' events) also these sites are 0.7 (g^m^3)^2 lower than other stations in late morning/early afternoon
w'co2': ok, no real difference between sites
co2'co2': ok, several spikes in overnight, stns 1 & 3 mostly the same but few periods where stn 1 has 0.005 units more than at stn 3; good daytime agreement

July 29, 20:20 CDT

Dan Rajewski (in Ames)

Summary: Stations 1-4 operational, Dan, Russ, and Jimmy serviced the wind cubes and the NCAR flux stations
Mixture of clouds and sun with warm and humid conditions with very light winds, reduction in horizontal visibility from 8:30 to 10:15 (fog-break up process)
Several sensors with anomalous readings during very wet periods (night and early morning)
Bug screens were placed on the 2mTRH inlets between 10:30 and 11:50 (see upcoming blog post)

Vdsm: 13.5-13.7 V during day, down to 12.4 at night
P: ok, pressure rising 5mb throughout the period, somewhat steady by noon

T.2m: night: stn 1 about 0.7-1.0 degree C warmer than stn 2 from 21:00-22:00, and from 2:00-4:00, periodic sensor spikes from dew/fog between 5:00-10:30; day: after the fog breakup stn 4 slightly cooler than other sites
RH.2m: similar spikes as in T.2m during overnight and early morning; after fog dissipation stn 4 5%RH higher than other sites
H2O.2m: stn 4 about 0.7-1.0 g/m^3 more vapor than stns 1 & 3 during the night, dew/fog problems part of the overnight and morning; after inversion breakup stn 4 about 1.0-1.5 g/m^3 more vapor than Sites 1-3 during the day

Wetness: heavy dew event from 20:30 to 6:30, sensor dry by 10:00

T.10m: stn 1 about 1.0 degree warmer than stn 2 for 20:00-21:00, otherwise sensors in close agreement during night and day (spikes also evident in hours before and after sunrise and at stn 3 during the inversion breakup
RH.10m: night: similar to T.10M but with stn 2  5%RH higher than stn 1, daytime stn 1 about 5%RH lower than sites 3 & 4 much of daytime after the fog breakup
H2O.10m: night: sites within +/- 0.5 g/m^3 of each other, sensor spikes also evident after 1:00 through 11:30; daytime: stn 1 & 4 about 1.0 g/m^3 less vapor than at stns 3 & 4

Spd.10m: ok, few period with stn 1 0.7-1.0 m/s lower than other sites from 2:00 to 4:00, also before sunrise and after stns 2 & 3 about 0.5 m/s less speed than at Sites 1 &4, daytime: stn 4 0.5 m/s lower than other sites

Dir.10m: ok, mostly NW to NE wind at night (few SW to S winds though), switching to ENE around sunrise and during fog breakup event, E to SE by afternoon

T.10m - T.2m: stn 2 warmer by 0.7-1.0 degrees at 10 m than 2 m from 2:00-4:00, close agreement in daytime thermal gradient after inversion breakup
H2O.10m - H2O.2m: stn 4 least moist at 10m vs. 2m during night, stn 2 & 3 about 1.0 g/m^3 wetter at 10 m vs. 2m. than for stn 4;  noon and later, stn 4 about 1.5 g/m^3 more vapor at 2m than 10m vs. the other sites

spd.4.5m: ok, similar for Spd.10m, but not exactly the same pattern from 2:00-4:00
dir.4.5m: ok, see comments for Dir.10m
w.4.5m: ok, stns 2 & 3 more positive velocity and stn 4 more w<0 most of the night up through sunrise, stn 1 starts in w>0 mode and switches to w<0 by 3:00
tc.4.5m: ok, night: several short periods where stn 1 is ~1.0 degrees C warmer than stn 2, stns 3 &4 in between the others; day: close agreement before and during fog breakup, afterward stn 1 & 2 about 0.5 degree cooler than sites 3 & 4
 
ldiag: ok
kh2oV: stns 2 & 4 above 100mV before fog/dew, dropping a few times to ~0mV, recovering to above 100mV after the inversion breakup
kh2o: stn 2 & 4 about 2.0-2.5 g/m^3 more moist than stns 1 & 3 during night, several spikes and high anomalous values during fog/dew; closer agreement at stn 2 in the daytime after the fog breakup, stn 4 about 3.0 g/m^3 more vapor than stns 1 &3
h2o(licor): ok, good nighttime agreement, several spikes caused by dew/fog, afternoon: stn 1 about 0.7-1.0 g/m^3 drier than stn 3
lidiag (licor): ok, few spikes corresponding to effect with dew/fog; no fictitious response in the afternoon

TKE.4.5m: ok, mostly in agreement few night periods where stn 1 is about 0.1-0.15 m^2/s^2 more than other sites; similar values at all sites during and after the inversion breakup
w'w': ok, similar to TKE.4.5m, also in u'u' and v'v'
u*: ok, similar to TKE4.5m, similar pattern also somewhat in u'w' and v'w'

w'tc': ok, higher TKE at stn 1 corresponds to somewhat more negative heat flux, close agreement in morning and afternoon
tc'tc': ok, all sites have overnight spikes at irregular intervals, good agreement in daytime

w'h2o': ok, overnight: several spikes at all sites noted (less severe at stn 1); morning and afternoon: slightly less flux (0.02 g/m^2/s) at stns 2 & 4 vs. stns 1 & 3
h2o'h2o' (licor): ok, several spikes during night but otherwise stn 1 & 3 in close agreement at these sites between periods of' spikes' and also during the day
kh2o'kh2o': stn 2 & 4 more anomalous high variances (in between 'spike' events) also these sites are 0.1 (g^m^3)^2 lower than other stations in early-mid afternoon
w'co2': ok, a bit more positive flux at stn 1 vs. stn 3 most of the night; close agreement during/after fog breakup
co2'co2': ok, several spikes in overnight,  good daytime agreement

July 28, 20:30 CDT

Dan Rajewski (in Ames)

Summary: Stations 1-4 operational, no ISFS staff on site
mixture of clouds and sun with warm and humid conditions with very light winds, heavy rain around 8:00-10:00
winds switching from Easterly overnight to SW and eventual Westerly by early afternoon

Vdsm: 13.5-13.7 V during day, down to 12.4 at night
P: ok, pressure rising 5mb throughout the period

T.2m: night: stn 4 about 0.7-1.0 degree C cooler than stn 1 from 1:00-2:00, other sites in between 1 & 4; day: stns mostly in agreement

RH.2m: stn 4 highest during day and night, 5-7% RH higher than other sites ; some night periods with stns 1 & 3 a few% RH lower than stn 2
H2O.2m: stn 4 about 0.7-1.0 g/m^3 more vapor than stns 1 & 3 during the night, stn 4 about 0.5 g/m^3 more vapor than Sites 1-3 during the day

Wetness: slight dew event from 22:00 to 6:00, sensor dry by 7:00, before extra rain from 8:00-10:00, sensor mostly dry by 12:30, sprinkles throughout the afternoon

T.10m: ok, mostly in agreement except for few hours before midnight stn 4 about 0.7-1.0 degrees C warmer than other stns
RH.10m: ok, night: stn 4 5-7%RH lower than other sites before midnight (before cloud cover comes?), within a few%RH of other sites rest of night and daytime
H2O.10m: ok, night: stn 1 & 4 about 0.5 g/m^3 less vapor than at stns 2 & 3; daytime stn 4 slightly lower vapor than at other sites

Spd.10m: ok, some separation of winds from 2:00-3:00 stn 2 & 3 about 0.7 m/s lower than stns 1 & 4
**max spd recorded during thunderstorm passage about 15m/s
Dir.10m: ok, mostly ENE to E during the night, after morning thunderstorm switching to SW and W by 13:00

T.10m - T.2m: stn 4 warmer by 0.5 degrees at 10 m than 2 m from 21:00-0:00, stn3 slightly warmer at 2m vs. 10 m also during this time
H2O.10m - H2O.2m: stn 4 most negative during night/day; difference of 1.0 g/m^3 more vapor at 2 m vs. 10 m than at other sites (is this real or fan-related behavior?)

spd.4.5m: ok, see comments for Spd.10m
dir.4.5m: ok, see comments for Dir.10m
w.4.5m: ok, stns 1 & 2 more positive velocity and stns 3 & 4 more w<0 from 20:00-1:30, during ENE to E flow, but pattern is less seen from 2:00-before rainfall
tc.4.5m: ok, night: stn 4 is about 0.7-1.0 degrees C warmer than other sites from 21:00-0:30; day mostly in agreement few hrs after rain
**right after rain we see response of sonic wick 'drying out', stns 2-4 only drop 0.5 C by rain, onto recovery by 1hr later, stn 1 is cooled 3.5 C by rain and takes 2.5 hrs to reach temp similar to other sites
possible influence of turbine movement from SE to WSW during the 2-3 hour period of wick dry-off?

ldiag: several spikes at stn 4 during rain (800 samples missing), other sites mostly ok

kh2oV: stns 2 & 4 about 80-40 mV for night/day behavior, after rain fall recovering to near 100-120 mV
**check tomorrow morning to see if kryptons should be cleaned
kh2o: stn 2 & 4 about 2.0-2.5 g/m^3 more moist than stns 1 & 3 during night, closer agreement (+/- 1.0 g/m^3) in the daytime after the morning storm
h2o(licor): ok, stn 1 about 0.7-1.0 g/m^3 drier than stn 3 for much of night and daytime
lidiag (licor): ok

TKE.4.5m: ok, mostly in agreement slightly more TKE at stn 4 from 23:00-0:00 and in stn 1 vs. other sites from 1:30-2:30
w'w': ok, similar to TKE.4.5m, also in u'u' and v'v'
**rain spike of 1.0 m^2/s^2 in w'w' and in u'u' of 6.5 units, and 4.0 units for v'v'
u*: ok, similar to TKE4.5m, (0.05 m/s higher u* at stn 4 23:00-0:00) also in v'w'

w'tc': ok, much of night before midnight 0.01 C m/s larger negative flux at stn4 than other sites, day peak positive flux slightly higher at stn3
tc'tc': ok, similar to w'tc', stn 4 with higher variance at night (by 0.05 C^2), variance is poor after rain passage until 11:00

w'h2o': ok, other than during/after period of rain stns are in close agreement
h2o'h2o' (licor): ok, 1 nighttime spike at stn1, several spikes during morning thunderstorm passage
kh2o'kh2o': stn 2 & 4 close to 1 & 3 at night, high anomalous readings during and a few hrs after rainfall, recovery by 13:30
w'co2': ok, no clear differences among site during night or day, expected spikes during/few hrs after storm
co2'co2': ok, expected spike in variance during/after rainfall

July 27, 18:45 CDT

Dan Rajewski (in Ames)

Summary: Stations 1-4 operational, no ISFS staff on site,
possible LLJ occurrence before clouds from overnight storms in MN/SD/NE spread over the area
mixture of clouds and sun with hot and humid temperatures with light winds, slight shower around 17:30
north of a warm front; which is progged to push north overnight and give heavy rain

Vdsm: 13.5-13.8 V during day, down to 12.4 at night
P: ok, pressure generally falling 3mb throughout the period; stn 3 & 4 slightly lower pressure than at stns 1-2

T.2m: night: stn 4 0.7-1.0 degree C cooler than other sites from 20:00-22:30 [July 26], also stn 1 about 0.5-0.7 degrees C lower than other stns during 1:00-2:00, day: sites are in agreement

RH.2m: stn 4 highest during day and night, 5-7% RH higher than other sites ; some night periods with stn3 few%RH lower than stns 1-2
H2O.2m: stn 4 about 0.7-1.0 g/m^3 more vapor than other sites during the night, stn 4 about 0.5 g/m^3 more vapor during the daytime

Wetness: slight dew event from 2:00 to 6:30, sensor dry by 8:00; sprinkles detected around 17:30

T.10m: ok, see T.2m
RH.10m: ok, night: similar to T.10m, daytime: close agreement
H2O.10m: ok, night: stn 1 & 4 about 0.5 g/m^3 less vapor than at stns 2 & 3; daytime stn 4 slightly lower vapor than at other sites

Spd.10m: ok, stn 1 about 0.7-1.0 m/s lower than other sites from 1:00-2:00 and from 4:00-5:00 (presence of a jet?)

Dir.10m: ok, SE to S overnight, SW back to S much of morning and afternoon; ENE with occurrence of light rain in late afternoon

T.10m - T.2m: stn 4 warmer by 0.7 degrees at 10 m than 2 m from 22:00-3:00, stn3 slightly warmer at 2m vs. 10 m
H2O.10m - H2O.2m: stn 4 most negative during night/day; difference of 1.0 g/m^3 more vapor at 2 m vs. 10 m than at other sites

spd.4.5m: ok, see comments for Spd.10m
dir.4.5m: ok, see comments for Dir.10m
w.4.5m: ok,
tc.4.5m: ok, night: stns 1 & 2 are about 0.7-1.0 degrees C cooler than other sites from 1:30-3:00; day: all sites agree within +/- 0.5 degrees C, stn2 slightly lower
ldiag: several spikes at stn 2 in the overnight hours, about 300 samples missing for much of the period;

kh2oV: stns 2 & 4 about 100-80 mV for night/day behavior, mid-morning peak of about 140 mV
kh2o: stn 2 & 4 about 3.0-3.5 g/m^3 more moist than stns 1 & 3, closer agreement (+/- 1.0 g/m^3) in the daytime
h2o(licor): ok, stn 1 about 0.7-1.0 g/m^3 drier than stn 3 for much of night and daytime
lidiag (licor): ok

TKE.4.5m: ok, stn 1 about 0.15 units less TKE than stns 2 & 3 from 1:30-2:30, 4:00-5:00; stn 4 during this period about 0.1 units greater TKE than stns 2 & 3; other periods around and after sunrise with less TKE at stn 1 vs. other sites
w'w': ok, similar to TKE.4.5m, also in u'u' and v'v'
u*: ok, similar to TKE4.5m, also in v'w'

w'tc': ok, much of night larger flux <0 at stn3 and 4 than other sites, daytime peak positive flux largest at stn3
tc'tc': ok, similar to w'tc', stn 4 with highest variance at night and stn 3 higher during the day

w'h2o': ok, stns 1 & somewhat stn 3 slightly higher afternoon flux than Sites 2 & 4, max value difference of 0.04 g/m^2/s
h2o'h2o' (licor): ok, 1 nighttime spike at stn3, daytime variances are close together
kh2o'kh2o': stn 2 & 4 0.4-0.6 (g/m^3)^2 less than other sites for daytime
w'co2': ok, no clear differences among sites
co2'co2': ok, stn1 slightly higher variance during 1:00-4:30, close daytime agreement

Steve Oncley measured the power draw of a station with a Licor 7500 (1) and with a krypton (2):

A CWEX station consists of:

• Viper CPU, compact flash, usb flash drive
• 1 8 port Diamond Emerald serial card
• Diamond pc104 power supply
• 1 CSAT3, reporting at 20Hz, non-oversampled mode (Ac)
• either
  • Licor 7500, reporting at 20Hz
  • Serializer in CSAT3 electronics, with CSI Krypton
• Vaisala barometer
• GPS
• two TRH's with fans
• 1 RMY prop
• Wisard base mote
• Cradlepoint CTR350 router, with wifi disabled
• Verizon USB760 cellular modem

The stations are transmitting continuously over the cellular modem.

July 26, 16:15 CDT

Dan Rajewski (in Ames)

Summary: Stations 1-4 operational, Steve O., Gene, Dan, and REU students visited stn 2 from 14:30-14:45
very light wind speed SSE to S, partly cloudy skies with hot and humid conditions
***anomalous ldiag readings much of overnight and morning at stns 2 & 4 (dew effects?), continuing in afternoon at stn 2

Vdsm: 13.5-13.8 V during day, down to 12.4 at night
P: ok, pressure mostly steady overnight but dropping in the afternoon; nighttime: stn 3 & 4 slightly lower pressure than at stns 1-2

T.2m: night: few periods where stn 1, 2 or 3 are about 1 degree C warmer than other sites; good daytime agreement

RH.2m: stn 4 highest during day and night; stns 1 & 3 few%RH lower than stn 2, 5%RH lower than stn 4
H2O.2m: ok, similar nighttime pattern to T.2m, daytime: stn 4 highest vapor content stns 2 &3 are close, stn 1 about 1.0-1.5 g/m^3 less than stn 4

Wetness: dew event from 20:30 to 7:30, sensor dry by 10:00

T.10m: ok, few periods at night when some stations are 0.5-0.7 degrees C lower/higher than the others; good daytime agreement
RH.10m: ok, night: similar to T.10m, daty: stn 4 slightly lower vapor concentration than other sites
H2O.10m: ok, night:

Spd.10m: stn 4 has no wind recorded from 11:30 to 14:30, but other sites are ~ 2m/s, was there a bird on the sensor; some missing data; or more likely lack of wind at that site?
Dir.10m: ok, variable directions: WSW to S around midnight, back to W around late morning than back to SSE by mid afternoon

T.10m - T.2m: all stns with similar temp gradients, some separation during overnight hours
H2O.10m - H2O.2m: stn 4 most negative during night/day; stns 2 & 3 slightly more vapor at 10m vs. 2 m than for other sites

spd.4.5m: ok, no clear differences among sites
dir.4.5m: ok, see comments for Dir.10m
w.4.5m: ok, stns 2 and 3 greater variability than other sites for nighttime
tc.4.5m: ok, night: stn 2 is about 0.7-1.0 degrees C cooler than other sites; day: all sites agree within +/- 0.5 degrees C
ldiag: several spikes at stn 4 during midnight to before-sunrise hours; stn 4 has spikes from 2:00-to present

kh2oV: stns 2 & 4 about 50-150 mV for night/day behavior
kh2o: stn 2 & 4 very high during night (dew effects) but stns 1 & 3 vapor decline during the night, daytime close agreement
h2o(licor): ok
lidiag (licor): few spikes in sample during 1:00-2:00

TKE.4.5m: ok, most night periods with stn 3 & 4 slightly lower TKE than other sites
w'w': ok, similar to TKE.4.5m, also in u'u' and v'v'
u*: ok, not as clear as in TKE4.5m

w'tc': ok, stn 3 slightly higher afternoon heat flux than other sites
tc'tc': ok, slightly higher variances at stn 1 & 2 for nighttime; daytime similar to w'tc'

w'h2o': ok, stns 1 & 3 slightly higher afternoon flux than other sites by 0.06-0.08 g/m^2/s
h2o'h2o' (licor): ok, similar agreement  but stn 1 variance lightly lower than at stn 3 from 4:00-6:00, and for mid afternoon hours
kh2o'kh2o': stn 2 & 4 high nighttime anomalous readings, close agreement during daytime generally 1.0 (g/m^3)^2 less than other sites
w'co2': ok, somewhat larger flux>0 at stn 1 vs. stn 3 at night; daytime: stations in close agreement except from mid-morning to early afternoon
co2'co2': ok