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