Field Notes

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Other sites visited today: Gilbert Tract | Mayberry | East End
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West Pond: 2022-09-15 13:00:00 (DOY 258)
Author: Daphne Szutu
Others: Kanishka

Summary: Regular data collection/cleaning, swapped 7500 for calibration, first fall precip expected soon, record-breaking heat wave last week

2022-09-15
West Pond

Kanishka and I arrived, ate lunch and started tower work around 13:00 PDT. It was mild and sunny with hazy clouds, with showers expected this coming Sunday. Last week 2022-09-05 to 2022-09-08, most the Bay Area had a record-breaking heat wave with 3 days of all-time high temperatures. Not much of a breeze here compared to Dutch Slough and Sherman Island. The water level is still going down, and the staff gauge read 22cm. The plants still look green though.

I downloaded met, cam, and USB GHG data. Kanishka cleaned flux and rad sensors. We topped off the wash reservoir. I downloaded the miniDOT data and swapped desiccant for the miniDOT and water level sensors.

We also swapped the LI-7500 for calibration: sn 0073 came off and sn 0035 went on. I uploaded a new config file and updated the pressure coefficients. I changed the eddy clock +30 sec from 12:11:20 to 12:11:50. I reset the box and all looks ok.

Sn 0073 read: 391ppm CO2, 711mmol/m3 H2O, 24.7C, 101.5kPa, 100SS
After cleaning, sn 0073 read: 400ppm CO2, 642mmol/m3 H2O, 14.0C, 101.5kPa, 102SS
sn 0035 read: 405 ppm CO2, 606mmol/m3 H2O, 24.9C, 101.5kPA, 99.3SS
The 7700 read: 2.0ppm CH4, 47RSSI – 87 after cleaning

We left at 13:45 PDT.

2 photos found

WP_autocam_20220916_1015.jpg ( 2022-09-16 10:15:01 ) Full size: 1920x1440
Mourning dove on boom