Field Notes

<--2022-08-16 13:45:00 | 2022-09-15 13:55:00-->
Other sites visited today: Gilbert Tract | West Pond | Mayberry
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East End: 2022-08-30 13:50:00 (DOY 242)
Author: Daphne Szutu
Others: Ari

Summary: Regular data collection/cleaning, Apogee650out bad--removed both Apogee sensors, many wasps about

2022-08-30
East End

Ari and I arrived at 13:50. It was warm, mostly clear, and muggy. We didn't have to go through any sheep fences today. Standing on the lower boardwalk, you can hear the breeze in the reeds but you can't feel it. There was only a little water at the tower, and the staff gauge read 10.5cm.

Many wasps were buzzing about, but they weren't aggressive.

I downloaded met, cam, and USB GHG data. I changed the eddy clock +30sec from 12:56:20 to 12:56:50 and restarted logging. Ari cleaned flux and rad sensors. We topped off the wash reservoir.

The Apogee 650out data looked bad, starting shortly after we left the site during our last visit. I tried a power cycle, which is usually pretty effective at fixing SDI-12 sensors if they are hung up for some reason. Not the case today, 650out data was still bad after the power cycle. Both incoming and outgoing sensors are wired to the same C and 12V/G ports. Ari helped me swap the incoming and outgoing Apogee cables to test if it was a cable issue, but nothing changed, so I think it's a sensor issue. We removed both incoming (sn 1053) and outgoing (sn 1054) sensors. I left the cables on the tower (power unplugged), but after coming back to the lab I realized we might not have any spare Apogee cable because the spare pair of Apogee NDVI sensors is deployed at GT.

The 7500 read: 411ppm CO2, 740mmol/m3 H2O, 29.1C, 101.3kPa, 92SS -- 93 after cleaning
The 7700 read: 2.0ppm CH4, 63RSSI – 78 after cleaning

We left at 14:20.

0 photos found

11 sets found

14 EE_met graphs found