Field Notes

Bouldin Corn: 2021-09-03 10:10:00 (DOY 246)
Author: Daphne Szutu
Others: Carlos

Summary: Regular data collection/cleaning, no harvesting yet, some gaps in met data on multiplexer, changed eddy clock +1min

2021-09-03
Bouldin Corn

Carlos and I arrived at 10:10 PDT. It was a mild day with a cool breeze and super hazy skies. Tyler had moved his chambers out of the field yesterday and had cleared some of the weeds behind our tower on the levee slope. We didnâ€™t see any signs of harvesting around us, but our field does seem drier than the surrounding fields, so it may be harvested sooner rather than later.

I collected met, cam, and USB GHG data. There were some gaps in the mux sensors, so I unplugged and replugged the mux blocks connecting it to the datalogger. Carlos cleaned flux and rad sensors and topped off the wash reservoir.

I changed the eddy clock +1min to match the laptop time. I reset the 7550 and checked that the clock still looked good.

I downloaded the FD data and cleared its memory. I downloaded the PA data and cycled its power. It didn't seem to startup the first time, but it seemed ok the second time I power cycled the sensor. I downloaded the IRT data by swapping microSD cards and using CardConvert to convert the fast data to TOB1 and the slow data to TOA5.

LI-7500 readings:
CO2 412ppm
H2O 607ppm
T 24.3C
P 101.4kPa
SS 102-->103 after cleaning
LI7700 readings:
CH4 2.0
RSSI 44-->78 after cleaning

We left at 10:45 PDT.

Looking at the data back in the lab, there is some weirdness with the HMP60 data where it has been topping out at ~33 deg for the last few days. Maybe this was related to the mux data hiccup and was fixed when I un/replugged the mux blocks on this visit.

2 photos found

20210904BC_Tower.jpg ( 2021-09-03 10:21:08 ) Full size: 1920x671
Panoramic of BC tower