Field Notes

<--2021-03-16 12:10:00 | 2021-04-15 12:50:00-->
Other sites visited today: Hill Slough | Bouldin Corn | West Pond | East End
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Bouldin Alfalfa: 2021-03-30 12:50:00 (DOY 89)
Author: Daphne Szutu
Others:

Summary: Regular data collection/cleaning, windy day, spectral, changed phenocam clock time +3min, RH/T sensor had fallen off tower -- repairable

2021-03-30
Bouldin Alfalfa

I arrived at 12:50 PDT. It was windy, sunny, and warm. The horizons were hazy but skies overhead were clear. The alfalfa looks about the same, green and lush around the tower/Arable structures but a bit chewed elsewhere.

I took spectral measurements were for the first time in a few months. I changed the phenocam clock from 12:06 to 12:09 to match the laptop time. I manually changed the time because the time zone disconnect between the laptop and the phenocam were leading to an incorrect time when I used the â€œSyncâ€ button in the Stardot software.

I downloaded met, camera, and USB GHG data; downloaded FD data and cleared its memory; cleaned met and rad sensors and topped off the wash reservoir.

As I was standing at the met box I heard something fall from the tower to the ground. HMP155 sn S3420870 had fallen out of its shield and was on the ground. The cable head had broken and the wires needs to be reattached via screw terminals. I brought the sensor and cable back to the lab for repair. From the phenocam photos, the sensor fell out of its shield between 8:45 and 9:15 on windy 2021-03-23.

LI-7500 readings:
CO2 404ppm
H2O 280ppm
T 22.2C
P 101.6kPa
SS 100--> 101 after cleaning

I left at 13:35 PDT.

Next Mowing: 2021-04-25

0 photos found

7 sets found

5 BA_flux graphs found