Field Notes

Bouldin Corn: 2020-12-16 13:55:00 (DOY 351)
Author: Daphne Szutu
Others:

Summary: Regular data collection/cleaning, hunters at the club, new combo lock on red gate, removed esoNFD chambers and brought back to lab, changed stardot time, changed eddy clocks +1min

2020-12-16
Bouldin Corn

I arrived at 13:55 PST. It was an overcast and cool day. There were many ducks flying overhead, and 2 groups of hunters prepping at the duck club. The PurpleAir PM2.5 AQI was around 145. The Rio Vista AirNow station had an AQI of around 70. There was a new combo lock on the red gate. It was open so I was able to see the combo, which Iâ€™ve emailed to Joe and Tyler.

The field was even more flooded than last week, and the water was about shin height under the tower. It was 47cm (1.54â€™) from the top of the pipe to the water level. I changed the water level desiccant.

I downloaded met, camera, USB GHG data, and PA data. I changed the stardot camera time from 4/16/2020 to 12/16/2020. The time was correct. For some reason the stardot changed from Dec to April starting Dec 1.

I downloaded and cleared the FD chamber and moved its power wiring to the met box. I removed the 4 eos NFD chambers with their cables, ground stakes, clamps, and the grey box with the power screw terminal. I brought everything back to the lab so that Joe can download data, update the firmware, and install them at BA on Friday.

I cleaned the flux and rad sensors. I swapped the 7700 hat for one with a full set of spikes. There was a 7700 time sync error. I changed the eddy clock from 14:06 to 14:07 on the 7550 to match the laptop time. I reset the box, and the time sync error went away. I topped off the wash reservoir.

LI-7500 readings:
CO2 466ppm
H2O 470ppm
T 12.2C
P 101.6kPa
SS 102-->103 after cleaning
LI7700 readings:
CH4 2.5 after cleaning
RSSI 67-->86 after cleaning

I left at 15:05 PST.

4 photos found

20201216BC_TowerFlooded.jpg ( 2020-12-16 13:55:25 ) Full size: 1440x1920
Water level has risen since last site visit. Area under tower is flooded about shin height.