Field Notes

East End: 2019-01-31 14:00:00 (DOY 31)
Author: Daphne Szutu
Others: Kuno, Jiangong

Summary: Regular data collection/cleaning, 7700 wash reservoir clogged, swapped AirT/RH HMP sensor, updated CR1000 datalogger program

2019-01-31
East End

Kuno, Jiangong, and I arrived at 14:00. It was mostly sunny, windy with some fog. The water level was 38 cm.

Jiangong cleaned the flux and rad sensor. There was bird poop on the lower 7700 mirror. We refilled the wash reservoir, which was still mostly full. I disconnected the wash outlet tube and tested the wash reservoir pump to check, but the outlet port only dribbled out water. The inside of the reservoir bottle looks like it could be clogged with duckweed. Additionally, the outlet tube below the bottle and around the filter was green with algae, and the filter had some electrical tape wrapped around it, so maybe the filter clogged and water is leaking out. There were quite a few wasps buzzing around and inside the wash reservoir box, so we left it as is for now, but should replace or fix it next time.

I downloaded met, camera, USB GHG, and minidot data. The RH data was bad (varied only from 10% to 13% and tracked AirT diurnal cycle, probably a wiring problem in the splice), so we swapped it out: sn U3030046 came down and sn L1740420 went up. This is an HMP60 that just came back from Campbell. I uploaded a new CR1000 program because the wiring changed from differential to single ended. After the swap, AirT=16C and RH=66%.

The eosGP CO2 sensor (sn GP20150111, 2% sensor) was maxing out in the water, and even when we pulled it out of the water for a few minutes it was still recording 5000 mV, which is suspicious. I left it in the water for now.

LI-7500 readings:
CO2 416ppm
H2O 553ppm
T 18.7C
P 101.3kPa
SS 90--> 95

LI7700 readings:
CH4 ??ppm --> didnâ€™t write down after cleaning
RSSI 0 --> 81

We left at 14:50.

0 photos found

11 sets found

14 EE_met graphs found