Field Notes

Hill Slough: 2023-04-25 16:20:00 (DOY 115)
Author: Daphne Szutu
Others: Robert

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

2023-04-25
Hill Slough

Robert and I arrived at 16:20 PDT. It was sunny, windy, and cool. It was near low tide and the water level was below the staff gauge.

I downloaded met, cam, and USB GHG data. Robert cleaned flux and rad sensors and topped off the wash reservoir.

We also swapped the LI-7500A for calibration: sn 0042 came off and sn 0041 went on. I did not have a chance to write down “before” numbers before Robert removed the old sensor. After the swap, I uploaded a new config file, updateted the pressure coefficient, changed the clock +45sec from 15:27 to 15:27:45 to match the laptop time, and rest the 7550 box. All seemed ok.

Sn 0041 fresh read: 417ppm CO2, 543mmol/m3 H2O, 27.4C, 101.3kPa, 98SS after cleaning
The 7700 read: 2.04ppm CH4, 55RSSI-- 74 after cleaning

We removed the EXO from the channel to bring back to the lab for calibration. We did our best to rinse off as many mysids (“shrimps”) as we could. Sensors removed:
sn 22E106072 Turbidity
sn 22E100649 fDOM
sn 22D102641 pH/ORP
sn 22C103416 EXO2

We left at 16:45 PDT.

0 photos found

4 sets found

20 HS_met graphs found