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