Field Notes

Sherman Barn: 2019-07-25 09:40:00 (DOY 206)
Author: Daphne Szutu
Others: Dennis, Alex, Josep Penuelas

Summary: Regular data collection/cleaning, spectral, swapped LI-7500A for calibration

2019-07-25
Sherman Barn

Dennis, our visitor Josep Penuelas, Alex, and I arrived at 9:40. It was mild and sunny with scattered cirrus clouds. The pasture was brown (green weeds inside our exclosure). The former ponds are dry, and we didnâ€™t see any cows on the field.

The small silver laptop keyboard was working only sporadically. I had spilled some rubbing alcohol on it the previous day. I downloaded met, camera, USB GHG, and the game camera data. The wash reservoir was mostly full; we topped it off. Alex cleaned flux and rad sensors. Dennis took spectral measurements. We swapped the LI-7500A for calibration: sn 75H-2669 came down, and sn 75H-2667 went up. I uploaded a new configuration file, updated the pressure coefficients, and reset the box.

LI-7500 readings (sn 75H-2669 --> sn 75H-2669 after cleaning --> sn 75H-2667):
CO2 407ppm --> 420 after cleaning --> 413
H2O 817ppm --> 596 after cleaning --> 731
T 29.8C --> 30 after cleaning --> 29.9
P 101.1kPa --> 101.1 after cleaning --> 101.0
SS 85--> 86 after cleaning --> 99
LI7700 readings:
CH4 1.95ppm
RSSI 30--> 83 after cleaning

We left at 10:25.

0 photos found

3 sets found

4 SB_flux graphs found