Field Notes

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Gilbert Tract: 2023-09-06 09:55:00 (DOY 249)
Author: Daphne Szutu
Others: Kyle

Summary: Regular data collection/cleaning, shadowband not spinning--fixed, ADCP data missing velocity beam data--power cycled

2023-09-06
Gilbert Tract

Kyle and I arrived at 9:55 PDT. It was windy, cool, and sunny. The wetland still looks very green. The staff gauge read 78cm at 9:25 PST.

I downloaded met, cam, and USB GHG data. Kyle cleaned flux and rad sensors. The reservoir was ¾ full; Kyle refilled it. The diffuse PAR sensor had stopped working yesterday. When I opened the motor enclosure and tugged on the screw terminal, the motor started turning again. There was some corrosion on two ports of the screw terminal, which might have been affecting the contact. I swapped out the screw terminal and I will see if that fixes it.

There were a lot of dead ants in the met box and live ants in the dfPAR CR10X box. I left mothballs in both.

The 7500 read: 399ppm CO2, 767mmol/m3 H2O, 20.0C, 101.2kPa, 101->103SS
The 7700 read: 2.1ppm CH4, 46RSSI – 81 after cleaning

We got to the channel at 10:35 PDT to download Flo’s data. I reset the clock and downloaded data. Velocity beam data was all 0 for the past 2 weeks. I power cycled the sensor and restarted data collection. I waited for the live data to show up again and it looked ok. System status = all clear, Vel beam 1 = -0.04, Bel beam 2 = 0.04.

Screenshot from last month of data. Velocity beam data was 0 for the last 2 weeks.
ADCP screenshot showing crappy data