Field Notes

Sherman Island: 2013-07-16 09:00:00 (DOY 197)
Author: Cove Sturtevant
Others: Sara, Yanel

Summary: Plant activity diminishing. Standard field measurements. Found 2 cm soil CO2 probe (profile A) partly out of soil - reinstalled. Took more instrument orientation measurements.

Sherman
2013-07-16

We arrived about 09:00 PDT. It was sunny, windy, and cool (18 C). The field has certainly wilted a bit, the plants a duller green and partly tan with a full top of white flowers. I measured the general vegetation height at about 50 cm.

I checked the tower while Yanel did spectral and Sara did soil CO2 flux and moisture point. I did well depth at the end. Sara reinstalled the 2 cm soil CO2 probe in profile A (the west profile) because it was partly out of the soil.

I had a hard time deciphering the photos that Joe took of the sensor orientation, so I did a few more specific measurements.
Height to middle of sonic: 3.2 m
Sonic orientation (+x direction): 0 N (magnetic)
Laterally from mid-sonic to mid-7500: 26 cm @ 280 N (magnetic)
Laterally from mid-sonic to LGR inlet: 20 cm @ 90 N (magnetic)

The ant traffic in the computer box was much less and the remaining ants were still visiting the ant baits.

LGR readings: 1.90 ppm, 09:00, 25.4 C, 129.0 Torr (adjusted to 146 Torr), 10 Hz

7500 readings:
CO2: 16.13 mmol m-3 (same after cleaning)
H2O: 600 mmol m-3 (same after cleaning)
diag: 248
p: 101.3 kPa
t: 21.4 C
sos = 343.7 m s-1

MET looked good.
Soil CO2 looked good.

1 photos found

SI_autocam_20130716_0815.jpg ( 2013-07-16 08:15:02 ) Full size: 1920x1440
Fieldwork