Field Notes

Mayberry: 2021-03-04 11:10:00 (DOY 63)
Author: Daphne Szutu
Others:

Summary: Regular data collection/cleaning, swapped 7500 for calibration, changed eddy clocks +3min, no miniDOT data--fixed, pCO2 data sporadically noisy

2021-03-04
Mayberry

I arrived at 11:10 PST. It was a mild and calm day with blue skies and hazy horizons. The staff gauge read 44 cm.

I downloaded met, camera, and USB GHG data.

The camera was off when I arrived. I didn't see any power issues in the rest of the data, so maybe the wiring is loose somewhere. We turned it back on and restarted it. Swapping the internal battery for the Canon last time seemed to mostly solve the issue of dark/under-exposed afternoon photos. There were still a 1-2 photos in the past week that were under-exposed, but it's much better than before where we were losing 1/2 a day's of photos.

The miniDOT had been left off by accident so there was no data to collect from the past month. I made sure to turn it on this time. I downloaded FD data and cleared its memory. I swapped the desiccant for the miniDOT and water level sensors. The wash reservoir was mostly full; I topped it off. I cleaned flux and rad sensors.

The eosGP sensor for dissolved CO2 was reading noise again since a few days ago. The wiring looked fine, but unplugging and replugging the mux block seemed to help.

The HMP AirT data might have been drifting low recently, but the most recent 2 weeks of data seem fine.

I swapped LI-7500s for calibration: sn 0073 came down and sn 0418 went up. After the swap, I uploaded a new config file and updated the pressure coefficient. I also changed the eddy clocks from 11:32 to 11:35 to match the laptop time. I reset the 7550 box and checked that the USB was logging, the 7700 was connected, and the times still looked good.

LI-7500 readings (sn 0073--> sn 0073 after cleaning --> sn 0418):
CO2 424ppm --> 424 --> 423
H2O 361ppm --> 377 --> 379
T 14.3C --> 14.5 --> 14.5
P 102.2kPa --> 102.2 --> 102.3
SS 97--> 98 --> 95
LI7700 readings:
CH4 2.08ppm
RSSI 67-->79 after cleaning

I left at 11:50 PST.

0 photos found

11 sets found

7 MB_flux graphs found