Daily status 9 Jan 2011
On site: Dong, Oncley (Militzer expected later today)
IOP5 ended early this morning with a cold front bringing 1-2" of snow.
Weather: low overcast in the valley, clear at higher elevations.
Summary: Everything working as expected. Some comments:
- Kryptons have had continual problems with frost/snow. Most clear themselves during the day.
- TRH's have plugged up in riming conditions. Use data with caution. (It will be challenging to identify these cases.)
- Props occasionally read lower even in winds greater than stall speed. <might> be real, but icing also possible.
- Precip tips overnight are the first real observations we've seen since we've been here (2 Jan)
- Soils are freezing, making Qsoil measurements (that only measure liquid water) decrease
- Conditions yesterday had Gsoil nearly constant; the digitizing resolution (0.1 W/m2) is seen in the data at all sites (except 7)
Vdsm: ok, lowest values 12.0-12.3V. We may brush off panels today.
Vmote.rad: ok. lowest values 12.5-12.9 V
Vmote.soil(aux): ok, lowest values 12.3-12.9.
Current Conditions:
P: ok 835 to 870 mb, with weak minimum last night. Now rising.
Tbaro:
T: ok -14 to -6 degC now, with up to 7 C drop at 6 overnight (but 2,5,7 show no drop)
RH: 85 to 97% now
Q: ok
Rainr (3,4,6): Tips overnight at all sites are real 1.0--3.1mm total
Spd (1,6): ok, 1,5 m/s now.
Dir (1,6): ok, westerly now.
csat diag: ok. Some spiking at 4,6 (and perhaps others) associated with snow.
samples.sonic: drop at 7AM this morning at 2,3,6 presumably snow related
spd: ok, 1--5 m/s now
dir: ok, W or N across network
u'u': ok, 0 to 1 m^2/s^2 dominated by events at 1 and 6 yesterday
v'v': ok, 0 to 1 m^2/s^2 dominated by events at 1 and 5 yesterday
w'w': ok, 0 to 0.2 m^2/s^2 (rather quiet in yesterday's haze)
u*: ok, 0 to 0.4 m/s
sigma_w/u*: 1 and 5 sometimes low
tc: ok, -16 to -6 degC now
tc'tc': ok < 0.7 degC^2; large nighttime values at 1,5,6
w'tc': ok, -0.03 to 0.05 m/s degC (-30 to +50 W/m^2)
kh2oV: all but 6 and 7 went to zero in last nights snow. 1 is recovering itself. Max values yesterday 0.7--3.1 V. Time to clean 2,3,4.
kh2o'kh2o': daytime very small, large values as sensors were covered last night
w'kh2o': small values during day; night values larger due to snow
All uplooking radiometers likely have snow on them this morning...
Rsw.in: ok, max only 400 W/m^2 yesterday
Rsw.out: ok, max 300 W/m^2 yesterday (snow cover at all sites)
albedo: ok, 0.7-0.9 at all sites, some with sun angle dependence
Rsw.dfs (1,7): up to 350 W/m^2 at Playa, 200 at River (large values could be real in yesterday's haze);
SPN-1 agreed with shadowband yesterday, but differs today, likely due to snow.
Rsw.global (1,7): max 250 W/m^2 yesterday
Rlw.in: ok, 200-290 W/m^2
Rpile.in: ok, -90 to 0 W/m^2
Tcase.in: ok, -15 to +1 degC
Tdome.in (1,2,5): ok, -15 to +1 degC
Rlw.out: ok, 220-300 W/m^2
Rpile.out: ok, -50 to +10 W/m^2
Tcase.out: ok, -14 to +1 degC
Tdome.out (1,2,5): ok, -14 to +1 degC
soil.aux at E & W Slope (5,6)
Tsoil: ok, abc2, eslope5aux, river7 now frozen. Some sites have very little variation (which is ok)
Gsoil: ok, with little surface forcing yesterday, fluxes nearly constant -- see digitizing resolution in data.
Qsoil: 7 (Eslope/River) to 29 (Hiland) %vol; expect values to go to 0 as soils freeze.
Cvsoil: ok, 5e5 (Wvalley, Eslope, River) to 1.8e6 (Playa, Wslope) J/(m^3 degK); strange abc jump yesterday.