Field Notes

Mayberry: 2013-12-06 12:30:00 (DOY 340)
Author: Cove Sturtevant
Others: Sara, Joe

Summary: Installed new conductivity probe, but need to check program. Swapped IRGA.

Mayberry
2013-12-06

We arrived about 12:30 PST. It was sunny and cool with minimal breeze. Joe and Sara went out into the water to clean the sensors, take water samples, and install the new conductivity probe while I checked the tower, downloaded data, and swapped the IRGA for a freshly calibrated one (removed sn 75H-2150, installed sn 75H-2180).

Joe installed the new conductivity probe at the crossbar of the scaffold, about 50 cm below the water surface. We need to grab the serial number for the probe next time (Note added by Daphne 2024-02-06: sn 6097 according to equipment history). At the tower I changed the program to fix a bug in the conductivity probe code but this made the readings for the new probe go from reasonable to bad, so we switched the program back to the old one and will re-evaluate the program in the lab.

There was no power to the autocam. The negative lead had been pulled off the battery. I reattached.

7500 readings:
CO2: 428 ppm (447 after cleaning, 440 after swap)
H2O: 318 mmol m-3 (260 after cleaning, 296 after swap)
signal strength = 92.75% (98.3% after cleaning, 93.7% after swap)
t: 10.6 C
p = 102.2 kPa (102.4 kPa after swap with correct pressure cal)
sos = 336.5 m s-1

Current 7700 readings:
CH4 = 2.75 ppm (same after cleaning)
RSSI = 44% (88 after cleaning)
The reservoir was 2/3 full. Refilled.

MET looked good.

0 photos found

11 sets found

7 MB_flux graphs found