Field Notes

Sherman Island: 2014-01-10 09:30:00 (DOY 10)
Author: Cove Sturtevant
Others: Joe, Dennis

Summary: Swapped LGR. Standard field work. Shadow band for diffuse PAR not turning. Measured collar heights for soil respiration. Soil respiration chamber needs new gasket. Measured sonic north (again).

Sherman
2014-01-10

We arrived about 09:30 PST. It was sunny, calm, and cool. Joe downloaded data and swapped the LGR (removed sn 05-0010, installed sn 08-0114), Dennis did soil respiration and moisture point, and I did spectral and well depth. The gear turning the shadow band on the diffuse PAR sensor was broken; Joe pulled it in for repair.

7500 readings:
CO2: 17.2 mmol m-3 (17.9 after cleaning)
H2O: 340 mmol m-3 (460 after cleaning)
Diag: 248 (247 after cleaning)
P = 102.9 kPa
T = 16.7 C
Sos: 340 m s-1

LGR readings before swap (sn 05-0010): 2.052 ppm, 09:41, 25.04 C, 98.2 Torr, 12.507 us
LGR readings after swap (sn 08-0114): 2.081 ppm, 10:04, 18.29 C, 145.94 Torr, 14.805 us
Joe also cleaned the 40um inlet filter. He sloshed alcohol around inside it and blew it clear with the cal gas.

For the soil respiration measurements, we changed the CO2 target from 390 ppm to 410 ppm to match the ambient concentration near the soil surface. Dennis measured the collar heights and noted that the soil chamber needs a new gasket where it seals with the soil collar. Soil collar heights (above soil surface) are as follows:
1: 1.5 cm
2: 2.7 cm
3: 2.9 cm
4: 3.0 cm
5: 2.2 cm
6: 1.8 cm

Cleaned radiation sensors.
Glued the camera window back in place.
Met looked good.
Also confirmed that the sonic north arrow points to ~10 degrees true north.

0 photos found

7 sets found

No data found for SI_mp.
11 SI_met graphs found