August 14
Dan Rajewski (in Ames)
Summary: Stations 1-4 operational, no ISFS staff on site,
mostly clear overnight and daytime, some high clouds
winds light and variable starting from N in the overnight and veering through to the S by early evening
Vdsm: 13.4-13.7 V during day, down to 12.4 at night
P: ok, pressure rising 3 mb overnight through 10:30, falling 3mb by the end of the period
T.2m: brief periods where stn 1 is 0.7-1.0 degrees C warmer than other sites and also periods where stn 2 is 0.5-0.7 degrees C cooler stns 3-4; close daytime agreement though slightly cooler at stns 1-2 vs. 3-4 in the mid morning
RH.2m: stns 1&3 about 5%RH lower than stn 4 during the night; stn2 also a few%RH lower than stn 4; daytime: stn4 a few %RH higher than other sites, stn3 1-2%RH lower than stns 1-2
H2O.2m: night: stn 4 about 0.5-0.7 g/m^3 greater vapor than stns 2-3 from 23:00-2:00 and stn4 a bit more moist than other sites the rest of the night and daytime
Wetness: heavy dew event fom 22:30-7:30, sensor dry by 9:15
T.10m: ok, stn 1 slightly warmer than other sites most of the night, stn 4 a bit cooler than other sites after midnight; good daytime agreement
RH.10m: ok, stn 2 about 5-7%RH lower than other sites from 23:00 to 10:00; also slightly drier at stn4 vs. others during the mid morning to early afternoon
H2O.10m ok, stn 2 about 1.0 g/m^3 drier than other sites much of the night and early morning; stn 4 about 0.5 g/m^3 less than the other sites for much of late morning to to late afternoon
Spd.10m: ok, stn1 higher speed of 0.7-1.0 m/s than the other sites up through 20:00-4:00
Dir.10m: ok, from the NW to N during the overnight, switching to E and SE by late afternoon
T.10m - T.2m: night: stn 2 about 0.7-1.0 degrees C warmer at 10 m vs. 2 m from 22:00-2:30; daytime: stns 3-4 a bit warmer at 2m vs. 10m than other site in the mid morning through early afternoon
H2O.10m - H2O.2m: night: several periods where stn2 is 1.0 g/m^3 drier at 10m vs. 2m than for stns 1 & 3, stn4 in a bit drier at 2m than for stns 1 & 3; day: stn 4 about 1.0-1.3 g/m^3 drier at 2m v.s 10m from 10:30 to the end of the period
spd.4.5m: ok, similar for Spd.10m
dir.4.5m: ok, see comments for Dir.10m
w.4.5m: ok, night: least positive or largest negative velocity for stn 4, stns 1& 3 have most upward velocity
tc.4.5m: ok, stn1 is about 0.5-1.0 degrees warmer than other sites for most of the night; stns 1-2 slightly cooler than Sites 3-4 in mid to late afternoon
ldiag: ok, short period around 3:00 where stn3 has a few 100 samples missing
kh2oV: ok, between 250-400 mV for night to day behavior
kh2o: night: stn 4 around about 2 g/m^3 wetter than stn 2 and about 4-5 g/m^3 more moist than stns 1 & 3 for the overnight and daytime;
h2o(licor): ok, stn 1 about 0.5-0.7 g/m^3 drier than stn 3 from much of the night; morning agreement by 9:30
lidiag (licor): ok, few spikes around 7:00
TKE.4.5m: ok, stn 1 higher TKE of 0.1-0.2 m^2/s^2 than other sites most of the night; close daytime agreement
w'w': ok, similar to TKE.4.5m, also seen in u'u' and v'v'
u*: ok, nighttime: stn 1 about 0.05-0.1 m/s higher than other sites; similar to TKE.4.5m, v'w' also similar more-so than u'w'
w'tc': ok, night: larger negative heat flux by 0.01-0.02 C m/s at stn 1 up through 2:00; close agreement in morning and mid-late afternoon, stn2 a bit lower flux than others during 11:30-13:30
tc'tc': ok, similar to w'tc' with Stn 1 having lowest variance most of night; 11:30-1:30 stn 2 about 0.3 degrees C^2 less than stn 4, stns 1 &3 about 0.1-0.15 less than stn 4
w'h2o': ok, stns 2&4 larger negative flux at night (after 22:00-6:30), stn 2 & 4 a bit lower positive flux during the late morning-early afternoon
h2o'h2o' (licor): ok, close agreement for nighttime; stns 1-3 about 0.2 (g/m^3)^2 greater variance than at stn 2 & 4 in the mid afternoon
kh2o'kh2o': night: both kryptons reading 0.05-0.1 units of higher variance than the licors; daytime
w'co2': ok, night: somewhat higher positive flux at stn 1 vs. 3 from 20:00-2:00, less difference after 3:00, early afternoon more negative flux at stn 1 vs. 3
co2'co2': ok, higher variance at stn3 vs. 1 as similar periods for w'co2' close agreement during daytime