Field Notes

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Sherman Wetland: 2017-07-14 13:10:00 (DOY 195)
Author: Daphne Szutu
Others: Joe Verfaillie

Summary: Regular data collection/cleaning, added diffuse PAR sensor, upgraded Licor software from 8.0.0 to 8.7.5

2017-07-14
Sherman Wetland

We arrived around 13:10. It was sunny with scattered clouds, and it was windy but not too bad. The water level was higher than last month. The bottom 2/3 of the CO2 sensor was under water.

I downloaded met, camera, and Licor GHG data, and cleaned the EC and radiation sensors. The wash reservoir was mostly full, and I topped it off.

LI7500 readings:
CO2 = 388.9 umol/mol --> 399.9 after cleaning
H2O = 403.6 mmol/m3
T = 24.9 C
P = 101.6 kPa
SS = 100.9 --> 103.3 after cleaning

LI7700 readings:
CH4 = 2.00
RSSI = 55.7 --> 72.0 after cleaning

I was having trouble re-setting the Licor software clock, and it has been having persistent 7700 clock sync errors. I upgraded the Licor interface sn AIU-1569 from 8.0.0 to 8.7.5., but the same problems remained after the upgrade.

Joe installed a diffuse PAR sensor on the SE corner of the scaffolding, on the same wooden post as the camera. He sawed off 60cm from the top of the post so that it would not shadow the radiometers, and then re-installed the camera at the top. The PAR sensor is sn 140457 and the CR10X is sn 25799. The PAR sensor is connected to a CR10X (mounted in a separate enclosure). The CR10X is connected to the CR1000 through a control port, and the CR1000 pings the CR10X for data through SDI-12.

We left around 14:45.

2 photos found

20170714SW_radmtD.JPG ( 2017-07-14 13:31:12 ) Full size: 1920x1440
Radiation sensors over Sherman Wetland with Mt. Diablo in the background