August 7 22:50 CDT
Dan Rajewski (in Ames)
Summary: Stations 1-4 operational, no ISFS staff on-site, Russ and Dan serviced the south wind cube around 21:00-23:00 CDT of August 6, turbines did not turn until 22:30 or so
clear skies were replaced with clouds from thunderstorms in southwest and south-central IA, thunderstorms in the vicinity but wind farm on the north edge of the rain band
mostly clear skies by morning with a scattered clouds through the afternoon, light to moderate winds out of the WNW and less humid conditions
Vdsm: 13.4-13.7 V during day, down to 12.4 at night
P: ok, pressure falling 2 mb by 1:00 and rising 2mb by mid morning, falling 2mb by early evening
T2m: stns 2 & 4 about 0.5 degrees C cooler from 21:00-22:00, stn 3 about 0.5 degrees C warmer from 2:30-3:00 and from 6:00-7:00; daytime most sites in agreement, largest temperature fluctuations during afternoon noted at stn4
RH.2m: stn 4 about few%RH higher than the other stations most of the night and morning; early afternoon stn4 is in close agreement with other sites
H2O.2m: night: stn 4 about 0.5 g/m^3 higher than at other sites much of the night and daytime
Wetness: thunderstorm/rain showers from 22:30 to 23:00, dew occurrence from 2:00-2:30 and from 6:00-7:00, sensor dry by 9:00
T.10m: ok, stn 1 slightly warmer than other sites from 20:00-22:30, stn3 slightly warmer than other sites from 6:00-7:00; good daytime agreement
RH.10m: stn 2 about 7-10%RH lower than other sites at night and through early morning, day: agreement in all sites by 12:00
H2O.10m: night: stn 2 about 1.5 g/m^3 drier than other sites, stn1 slightly lower than stns 3 & 4 up though midnight; day: stn 2 about 0.5 g/m^3 drier than other sites until 10:30; about 0.5 g/m^3 drier at stn 4 vs. other sites for much of afternoon
Spd.10m: ok, close agreement in speed, nighttime peak wind of 5/ms around 1:00
Dir.10m: ok, WSW to S winds up through midnight, then switching back to W by 4:00 and mostly W or WNW after 7:00
T.10m - T.2m: night: fairly close agreement among all sites; day stn 4 slightly warmer at 2m vs. 10 m for mid afternoon
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 12:00, 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 spikes in direction during the rainfall events
w.4.5m: ok, before rain event stn 3 highest uplift ~0.03 m/s, stns 1-2 about 0.02 m/s, stn 4 about 0.0-0.01 m/s; after the rain stn 3 a bit more w>0 than other sites, stns 2 & 4 have more w<0 or near zero; afternoon stns 3-4 a bit more negative vertical motion than sites 1-2
tc.4.5m: ok, see comments for T.2m
ldiag: ok
kh2oV: ok, near 150-250 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 3.0 g/m^3 wetter than other sites, stn 4 about 2.0 g/m^3 more moist
h2o(licor): ok, stn 1 about 0.5 g/m^3 drier than stn 3 from much of the night; close agreement by 12:00
lidiag (licor): ok
TKE.4.5m: ok, sites in good agreement, capturing a 1.6 (m/s)^2 spike around 1:00
w'w': ok, similar to TKE.4.5m, also in u'u' and v'v'
** v'v' slightly higher variance ~0.1 (m/s)^2 at stn 3 vs. other sites during late morning/early afternoon
u*: ok, somewhat similar to TKE.4.5m, also u'w' similar daytime pattern to v'v'
w'tc': ok, night: close agreement, few short periods where stn3 flux is slightly more negative; close agreement for daytime including peak flux for early afternoon
tc'tc': ok, similar to w'tc', also for late afternoon higher variance at stn 4 by 0.05-0.10 degrees C^2 vs. other sites
w'h2o': ok, close agreement first part of night, stn2 slightly higher than others for few short periods around 1:00 and around 4:00; 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 as in w'h2o'; morning and afternoon; stn 2 & 4 about 0.25 g/m^2/s lower than other sites in the late morning through afternoon
w'co2': ok, night: mostly in agreement, rain induced effect: from 23:00-0:00 about 0.0015 g/m^2/s higher at stn 1 vs. stn 3; peak negative flux also slightly higher at stn 1 vs. 3 otherwise good daytime agreement
co2'co2': ok, rain induced effect: stn 1 sightly higher (1*10^-3 (g/m^3)^2) than stn 3 from 23:00-0:00; otherwise sites mostly in agreement rest of night and day