Field Notes

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Other sites visited today: Mayberry | East End | Bouldin Alfalfa | Hill Slough
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Bouldin Corn: 2021-12-01 13:10:00 (DOY 335)
Author: Daphne Szutu
Others: Joe

Summary: Regular data collection/cleaning, calibrated 7700, removed barometer

2021-12-01
Bouldin Corn

Joe and I arrived at 13:10 PST. It was cool but sunny with blue skies. Many, many geese flying by in long strings. The grass and volunteer corn are still coming up in the corn field. Joe checked and tightened the tie downs in the corner.

We calibrated 7700 sn TG1-0357. The optics RH was 24%, so after the calibration we flushed the headspace with zero air until it read 10% and swapped out the desiccant bottle for one with fresh drierite. The calibration looked good.

I downloaded met, cam, and USB GHG data. I downloaded the FD data and cleared its memory. I downloaded the IRT data by swapping the microSD card and using CardConvert to convert the fast data to TOB1 and the slow data to TOA5.

No PurpleAir data because the sensor still needs a new part. However, recent air quality has generally been poorer than average (AQI>100) because of the winter inversion.

The mux data still look ok after I tightened the CLK/RES/12V/G screws on the mux on the last visit.

The Vaisala barometer sn L2340502 was giving bad data of about 80 kPa. We removed it and brought it back to the lab for testing. We don't plan on replacing it. The flux processor should substitute li75p or li77p instead.

At one point a hunter drove by and requested our tower bring in more ducks and geese for them.

LI-7500 readings:
CO2 457ppm
H2O 599ppm
T 22.9C
P 101.8kPa
SS 99 --> forgot to write after cleaning
LI7700 readings:
CH4 2.5ppm
RSSI 63 --> 73 after cleaning

We left at 14:05 PST.

0 photos found

6 sets found

17 BC_met graphs found