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