Field Notes

East Pond: 2019-04-18 12:25:00 (DOY 108)
Author: Daphne Szutu
Others: Alex, Jiangong

Summary: Regular data collection/cleaning, swapped 7500 for calibration, uploaded new CR1000 program, water level above outlet boards

2019-04-18
East Pond

Alex, Jiangong, and I arrived at 12:25. It was warm and sunny with a mostly clear sky (some cirrus clouds). The water level at the tower was 53 cm. At the outlet drain, the water level was above the boards. Alex cleared out the drain but the water did not drain, so it must be plugged elsewhere or the water level in EE (on the other side of the levee road) may be higher. She walked around the outlet drain and measured water depths around 40-50cm.

Jiangong cleaned flux and rad sensors. We refilled the wash reservoir; we left the reservoir box top open to dissuade wasps. I downloaded met, camera, and USB GHG data. I disrupted ants and eggs in the datalogger enclosure and left them some mothballs. After last weekâ€™s re-wiring, AirT looks good, with no obvious gaps. PARin and PARout had synchronized, but random gaps, which is strange because they are on opposite ends of the mux. I decided to move PARout to the end of the mux (from channel 3 to channel 15) and uploaded a new CR1000 program.

We swapped the 7500: sn 0073 came down and sn 0065 went up. After the swap, I uploaded a new configuration file, updated the pressure coefficients, and reset the 7550 box. The 7700 had a flickering time sync error which went away after I swapped the USB and reset the box again.

LI-7500 readings (sn 0073--> sn 0065):
CO2 407ppm --> 421
H2O 540ppm --> 547
T 25.9C --> 27.2
P 102.3kPa --> 102.3
SS 94--> 98 after swap

LI7700 readings:
CH4 2.0ppm
RSSI 51 --> 72 after cleaning

We left at 13:00.

0 photos found

5 sets found

Can't check MBEEWPSWEPGT_cam
9 EP_met graphs found