Field Notes

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Other sites visited today: West Pond | Bouldin Corn | Bouldin Alfalfa
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East End: 2020-08-21 10:00:00 (DOY 234)
Author: Daphne Szutu
Others: Christiana

Summary: Regular data collection and cleaning, terrible air quality because of wildfire smoke, water level is still low, swapped 7500 for calibration

2020-08-21
East End

Christiana and I arrived at 10:00 PDT. The day was warm and the air quality was terrible because of wildfires that started earlier this week. The sky was murky brown and the sunlight was reddish. Weâ€™re now into month 6 of coronavirus shelter-in-place.

The wetland is about Â½ brown, itâ€™s still dry under the tower, and all the water sensors are in the air. Thereâ€™s been no water in the water level sensor well since early June. The water level is below the staff gauge. I cleaned the conductivity sensor, which was a little muddy but otherwise clean. I needed a wrench to get the brush out of the sensor.

I downloaded met, cam, USB GHG, and miniDOT data. I checked the eddy clocks and adjusted it slightly: when the clock said 9:30, I changed it to 9:33. The pi-cam had tilted about 20-30deg; I corrected it. I swapped the LI-7500A for calibration: sn 0042 came off and sn 1594 went on. I updated the configuration file, changed the pressure coefficient, and reset the box. I cleaned flux and rad sensors, topped off the wash reservoir, and swapped the miniDOT and water level desiccant.

LI-7500 readings (sn 0042 --> sn 0042 after cleaning --> sn 1594):
CO2 403ppm --> 421 --> 424
H2O 870ppm --> 760 --> 737
T 24.7C --> 25.4 --> 26.4
P 100.9kPa --> 100.9 --> 100.9
SS 96--> 102 --> 96
LI7700 readings:
CH4 1.95ppm
RSSI 36-->80 after cleaning

Christiana left around 10:10 PDT and I left at 11:00 PDT. I gave Christiana the gate code; she may be back to do some GPS mapping around the island (ground truthing of vegetation patches).

1 photos found

20200821EE_BrownSky.jpg ( 2020-08-21 10:18:17 ) Full size: 1920x1350
Brown sky, brown wetland. The air quality is terrible today because of wildfires starting earlier this week.