July 10, 9:52 CDT [July 11]
Dan Rajewski (in Ames)
Summary: Stations 1-4 operational, no ISFS staff on-site
winds from SE to SSW during night ~5m/s , southerly during daytime ~10 m/s
thunder shower passage 9:00 to 11:00
winds light from ESE early afternoon to SSE late evening
Vdsm: 13.5-13.8 V during day, down to 12.5 at night
P: ok
T.2m: ok, stn1 about 0.5 degree cooler than stns 2-4 around 0:00-1:00
stn 2 is about 0.5-0.75 degrees warmer than other sites in daytime, stn4 is slightly cooler than stns 1 & 3
RH.2m: 90-95% nighttime; 85% daytime after thunder storm passage
early night: stn 4 5% RH higher than stn 1-3,
daytime 12:30 to 4:00 stn 5% RH lower than stn1, stn 1 few %RH lower than stn 3 & 4
early evening stns 1-2 few%RH lower than stns 3 & 4
H2O.2m: ok, 18 g/m^3 night, 26 g/m^3 day;
stn 1 about 0.3-0.5 g/m^3 less than other sites most of overnight;
daytime stn 1 0.5-0.7 g/m^3 less than stns 2 & 4, stn3 0.5 to 0.7 g/m^3 more than stn 2 & 4
Wetness: sensor response to dew at 20:00 [Jul 9] until 5:30 [Jul 10], sensor remaining wet following storm passage (9:00 thru 11:30)
sensor dry by 13:00
T.10m: ok, stn 2 0.5 degree warmer than other sites between 0:00-1:00, 2:30-3:30
daytime stn4 slightly cooler (0.25 degrees?) than other stations
RH.10m: ok, stn4 few%RH lower than other sites for several nighttime periods
stn 1 slightly lower than other sites for daytime
H2O.10m: ok, nighttime: 0.5 g/m^3 less vapor at stn 4 vs. stn 2 (stns 1,3 in between the two)
few daytime periods with 1 g/m^3 less vapor at stn 4 than stns 2-3, stn 4 driers, stn 1 in between all sites
Spd.10m: ok, stn 1 0.75-1.0 m/s lower than other sites from 1:00-2:00, 5:00-6:00 other times within 0.5 m/s less of other sites,
daytime: stn 4 certain periods of slightly lower wspd than other sites
Dir.10m: ok, SSE to S flow much of night, ESE a few hours before rainfall, after storm passage winds from ESE to later SSE
T.10m - T.2m: ok, stns 1 & 4 0.5 degree warmer at 10 m vs. 2m than at stn 2,3 mostly before midnight on Jul 9
daytime stn2 warmer at 2m than 10 m at least by 0.75 degrees from 13:00-15:00 by as much as 1.5 degrees
H2O.10m - H2O.2m: ok, stn 1 near zero gradient vs. than other sites (~0.5 g/m^3 drier at 10 m) most of night
daytime stns 3 & 4 are drier (more negative gradient, ~3.0 g/m^3 ,10m-2m) than other sites (2.0 g/m^3)
daytime stn 1 slightly smaller dry gradient than at other sites
spd.4.5m: ok, see comments of Spd.10m
dir.4.5m: ok, larger nighttime variations noted at 4.5 vs. 10 m from 22:00 (Jul 9)-2:00 (Jul 10)
stn 1 more SSE vs. other sites S wind at 4.5 m, all sites at 10m with S wind in this period
w.4.5m: ok, stn 2 more w>0 (0.03 m/s) from 22:00 (Jul 9) -4:00 (Jul 10) than other sites, stns 3 &4 more w<0 (-0.05 m/s) during this period
stn 1 closest to 0 in nighttime (0.02 m/s)
after storm passage: stns 3-4 mostly w<0 (-0.10 m/s) much of daytime, stn2 closest to zero or slight ascent in daytime
tc.4.5m: ok, stns 1 & 2 about 0.5 degree cooler than stns 3-4 much of nighttime
same sites also 0.3-0.5 degree cooler much of mid afternoon/evening
ldiag: ok, a few 100 samples missing around rainstorm
vh2ov: ok, stn 2 above 100 mV before rain fall, below 20 mV rest of period
stn 4 above 100 mV most of night/morning; below 50 mV after the rain and the remainder of the period
kh2o: ok, stn 4 about 1 g/m^3 drier than stn 2 in night and daytime
anomalies in reading until sensor dries out around 15:00 then stn 2 about 2 g/m^3 more moist than stn 4
h2o(licor): ok, btwn 16-24 g/m^3 for night to day behavior
stn 1 close to stn 3 for night period
daytime agreement with stn 1-3, these are about 0.5 g/m^3 drier than stn 4 and about 2 g/m^3 drier than stn 2
lidiag (licor): ok, a few samples not taking during and after rain fall (9:00-12:00)
TKE.4.5m: ok, stn 1 consistently lower TKE (0.20 m^2/s^2) in overnight than other sites (0.3-0.4 m^2/s^2), stn4 peak values (~0.6 m^2/s^2)
slight periods where stn 3 & 4 have TKE close to stn 1 value
daytime slightly lower TKE (0.3 m^2/s^2) at stn 3 & 4 vs. other sites
w'w': ok, see comment for TKE.4.5m, also similar pattern in u'u' and v'v'
u* : ok, see comment for TKE.4.5m, 0.05 m/s lower at stn 1 vs. other sites for much of overnight, also pattern seen in u'w' and v'w'
greater departure in stn 1 v.s other sites v'w' stress than u'w' stress
w'T' : ok, nighttime: stn 4 more cooling (-0.03 C m/s) than other sites (-0.01 C m/s)
daytime: no major differences among sites
w'h2o': ok, stn 3 & 4 give largest positive daytime flux max~0.20 g/m^2/s
stn 2 least upward flux max~0.15 g/m^2/s, about 0.025 g/m^2/s less than at stn 3
h2o'h2o': ok, stns 1,3 mostly in agreement
kh2o'kh2o': not ok, krypton sensors at sites 2,4 give high anomalous readings after the morning rainfall until 15:00
co2: ok, stn 1 > stn 3 by 0.01 g/m^3 much of nighttime
daytime stn 1 > stn 3 by 0.02 g/m^3
w'co2': ok, see comments for co2 (slight flux > 0 at stn 3 vs. stn 1 in overnight)
more flux < 0 at stn 3 vs. stn 1 during daytime
co2'co2': ok, very small, but less variance at stn 3 than stn 1 for most of nighttime
after sensor dries from rain: slightly larger variance at stn 3 vs. stn 1 also in daytime