Field Notes

<--2021-05-13 13:30:00 | 2021-06-09 13:25:00-->
Other sites visited today: Hill Slough | West Pond | Mayberry | Sherman Wetland

East End: 2021-05-26 13:25:00 (DOY 146)
Author: Daphne Szutu
Others: Dennis, Robert

Summary: Regular data collection/cleaning, swapped 7500 for calibration, calibrated 7700

2021-05-26
East End

Dennis, Robert, and I arrived at 13:25 PDT. It was a breezy and warm day. The water level has come up again and the staff gauge read 47cm.

I collected met, camera, and USB GHG data. Robert cleaned flux and rad sensors. The wash reservoir was 90% full; we refilled it.

We calibrated LI-7700 sn TG1-0423 with 2 AMP tanks. The Zero cal gas was a baby tank of N2 that Sebastien B. had dropped off to us in the lab this morning. The Span cal gas is also an AMP tank with CH4 concentration of 4.223 ppm. The zero and span were very close. After the calibration, we reattached the 7700 spray nozzle.

We also swapped the LI-7500 for calibration: sn 0065 came off and sn 1594 went on the tower. I uploaded a new configuration file, updated the pressure coefficients, and reset the box. The small silver USB that I had removed from HS had errors and was not showing as much free space as I expected. I reformatted the drive, which fixed the error.

LI-7500 readings (sn 0065 --> sn 1594):
CO2 416ppm --> 420
H2O 490ppm --> 426
T 28.1C --> 29.6
P 101.5kPa --> 101.4
SS 102 --> 103 after cleaning --> 96 after swap
LI7700 readings:
CH4 2.03
RSSI 40 --> 80 after cleaning

We left at 14:15 PDT.

0 photos found

11 sets found

14 EE_met graphs found