Field Notes

Mayberry: 2015-03-05 09:40:00 (DOY 64)
Author: Cove Sturtevant
Others: Joe, Sara

Summary: Data download. PAR tule still bad, maybe bad MX channel. Need better glue for copper mesh on CO2 probes. Bottom MiniDOT probe ok.

Mayberry
2015-03-05

We arrived at about 09:40 PST. It was sunny, cool, and calm. Sara did water samples and cleaned water sensors while I attended to the tower and Joe replaced the PAR tule sensor. It was reading super high after re-install, and after zeroing the channel in the multi-plexor it read the same thing. Channel might be bad. Joe will think about it and fix later. We also wanted to swap out a forerunner water CO2 probe with copper mesh on it to keep out the critters, but after pulling the profile we realized that the glue holding the copper mesh doesnâ€™t stick well to the probe. No probes have copper mesh at present.

Downloaded all data, including MiniDOT data. Left the bottom sensor out of water for a while and it showed a substantial rise from 0 to 7 mV, increasing about the same as the higher probes. I think this sensor is fine, thereâ€™s just no oxygen close to the sediment surface.

Tule 1 TS16 is bad.

Readings
CO2: 407 ppm (416 after cleaning)
H2O: 450 mmol m-3 (420 after cleaning)
signal strength = 98.86% (102.54% after cleaning)
p = 102.8 kPa
t: 12.6 Â°C
sos = 340 m s-1
CH4: 2.1 ppm
RSSI: 38-40% (69% after cleaning)

Cleaned rad.
Forgot to check 7700 reservoir, but none of the others were close to empty so it should be fine.
â€ƒ

0 photos found

11 sets found

7 MB_flux graphs found