Field Notes

<--2013-04-26 09:30:00 | 2013-05-15 15:00:00-->
Other sites visited today: Mayberry | Twitchell Rice | West Pond | DWR Corn

Sherman Island: 2013-05-09 15:30:00 (DOY 129)
Author: Cove Sturtevant
Others: Joe, Iryna, Laurie

Summary: Regular field work. Swapped out CNR1 and put split tubing to protect wires from sun. LGR inlet was lying on ground, replaced. Soil CO2 was off due to low voltage disconnect, reset.

Sherman
2013-05-09

Joe and I arrived about 15:30 PDT. It was sunny, breezy, and warm. The site is filling in well with grass and pepperweed. The pepperweed is beginning to flower - white patches in places. Laurie and Iryna were at the site earlier and did regular field work (LAI, soil respiration, spectral well depth, moisture point).

We did general tower maintenance and swapped out the CNR1 net radiometer. S/N 020476 came off and S/N 990181 was installed. We also put split tubing around the net radiometer wires and several other wires to protect them from sun damage.

LGR readings: 1.888 ppm, 14:33, 22.67 C, 123.48 Torr (adjusted to 143.7 Torr), 16.813 us, 10 Hz
A connection to the LGR air inlet near the sonic was broken and the inlet funnel was lying on the ground. The broken component was removed and the inlet was reinstalled.

7500 readings:
CO2: 15.98 mmol m-3
H2O: 644 mmol m-3
diag: 248, no change after cleaning
p: 101.84 kPa
t: 24.88 C

MET looked good.
Soil CO2 was off and the low voltage disconnect on the solar controller was active. Joe reset it.

1 photos found

SI_autocam_20130510_1915.jpg ( 2013-05-10 19:15:02 ) Full size: 1920x1440
Nice sunset