Field Notes

Sherman Barn: 2019-11-19 10:40:00 (DOY 323)
Author: Daphne Szutu
Others:

Summary: Regular data collection/cleaning, spectral, AirT reading bad - brought HMP back to lab, tested and adjusted tipping bucket

2019-11-19
Sherman Barn

I arrived at 10:40. Ariane was at Mayberry collecting water samples. It was a windy day with clear skies. The grass around the tower is all brown and short. There were some cows north of the tower.

I downloaded met, USB GHG, and game camera data. I forgot to get the phenocam data. I reset the game camera clock. I cleaned flux and rad sensors and refilled the wash reservoir from 1/3 full. The HMP45 (sn U3030041) AirT reading had been hovering around 2 degC for the past few days(RH looked ok). It wasn't an obvious power or wiring problem, so I brought it back to the lab for testing. This sensor also had AirT spikes a while back. I took spectral measurements.

I tested the tipping bucket sn 49187-109. The funnel looked clean, so I connected it to a CR23x and dripped 475ml of water through the bucket, which should result in 100tips--got 104 tips. I turned both set screws Â½ rotation CCW. It should be retested at the next site visit.

LI-7500 readings:
CO2 402ppm
H2O 524ppm
T 18.1C
P 100.9kPa
SS 94--> 100 after cleaning
LI7700 readings:
CH4 1.90ppm
RSSI 17-->78 after cleaning

I left at 11:40.

0 photos found

3 sets found

4 SB_flux graphs found