Field Notes

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Vaira: 2023-07-06 11:20:00 (DOY 187)
Author: Daphne Szutu
Others: Dennis, Ngoc

Summary: Regular data collection/cleaning, raised eddy sensors, first heat wave last weekend

2023-07-06
Vaira

Dennis, Ngoc, and I arrived around 11:20 PDT. We stopped at the USGS office in Davis to drop off fDOM calibration solution on the way here, so it was a little later than usual. We are doing regular data collection while Joe is in Japan.

It was sunny, warm, and still. The watering hole was still half full. There was a short heatwave last weekend where temperature were above 40C for 2 days. The trees still look nice and green.

I downloaded met, cam, and USB GHG data. I downloaded data from both FD chambers and cleared their memories. I changed the eddy clock +45sec from 10:34:15 to 10:35:00 PST to match the laptop time and restarted logging afterwards.

The 7500 read: 421ppm CO2, 544mmol/m3 H2O, 28.9C, 99.3kPa, 100.4SS

Dennis measured the well water level and cleaned the radiometer sensors, which he said weren’t too dirty. He noted that the Delta-T BF3 dfPAR dome was missing its weatherstripping and should be decommissioned before the rainy season.

Dennis wanted to raise the eddy flux post to reduce spectral interference from the enclosures directly below the eddy sensors. The sensors were raised 19cm.

Ground to top surface of sonic arm = 135cm before, 154cm after
The sonic orientation was 21 deg true N both before and after.

We left at 12:05 PDT. I will collect the pond data next time.

Field Data

No tank data

Well Depth