Field Notes

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Other sites visited today: Bouldin Alfalfa | Bouldin Corn | Gilbert Tract
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Hill Slough: 2023-10-26 15:45:00 (DOY 299)
Author: Daphne Szutu
Others: Dennis, Arman

Summary: Regular data collection/cleaning, swapped 7500 for calibration

2023-10-26
Hill Slough

Dennis, Arman, and I arrived at 15:45 PDT. Today was Arman’s first visit to the Delta. It was breezy and sunny with some clouds near the horizon—overall a lovely fall day. It was near high tide and the staff gauge read 5.95ft at 14:45 PST.

I downloaded met, cam, and USB GHG data. The EXO and dissolved CO2 (eosGP) data look better now that the sensors are out of the mud. Dennis and Arman cleaned flux and rad sensors. We swapped the 7500 for calibration: sn 75H-2176 came off and sn 0418 went on. I uploaded a new config file and updated the pressure coefficients.

2176 dirty: 417ppm CO2, 391mmol/m3 H2O, 20.0C, 101.9kPa, 98SS
2176 clean: 419ppm CO2, 450mmol/m3 H2O, 20.2C, 101.9kPa, 99.6SS
0418 fresh: 423ppm CO2, 318mmol/m3 H2O, 20.4C, 101.9kPa, 98.9SS
The 7700 read 2.02ppm CH4, 54RSSI – 80 after cleaning

I measured the conductivity from the porewater sipper and from the surface water.

Sample, Temperature-compensated conductivity, Sample temperature, Time
Porewater, 8.20mS, 17.7C, 15:00 PST
Surface, 5.40mS, 17.9C, 15:00 PST
We left at 16:05 PDT.

0 photos found

4 sets found

20 HS_met graphs found