Field Notes

Sherman Island: 2014-04-03 10:30:00 (DOY 93)
Author: Sara Knox
Others: Patty

Summary: Standard field work. Reloaded old program for soil CO2.

Sherman
2014-04-03

We arrived about 10:30 PDT. It was slightly overcast and cool with a mild breeze. The pepperweed continues to grow and the grass understory is still present.

Patty did spectral, and moisture point while I attended to the tower. Met and Flux readings looked good. We decided not to pull soil moisture probes 1 and 3 since the values seemed similar to the theta probes near the CO2 system. Soil moisture probe 2 was actually giving much lower readings then all the other probes (~100 vs 500-600 mV). I did veg height, well depth and LAI 2000 measurements while Patty reloaded the old program for the soil CO2 system since the latest program didnâ€™t seem to be working.

LGR readings: 1.977 ppm, 20.95 C, 142.16 Torr, 14.77 us, 10 Hz

7500 readings:
CO2: 17.64 mmol m-3 (same after cleaning)
H2O: 503 mmol m-3 (same after cleaning)
P = 101.84 kPa
T = 13.89 C
Diag: 249 (same after cleaning)
Sos: 341.2 m s-1

Veg Height (cm): Tape measure from ground to top of plant - short green grass layer and pepperweed really taking off
75, 69, 79, 2, 67, 2, 40, 38, 30, 0, 45, 30, 70, 32, 2, 58, 0, 40, 62, 64, avg = 40.3, stdev = 27.55

1 photos found

SI_autocam_20140403_1545.jpg ( 2014-04-03 15:45:03 ) Full size: 1920x1440
view of field site