Field Notes

Sherman Wetland: 2021-03-04 09:30:00 (DOY 63)
Author: Daphne Szutu
Others:

Summary: Regular data collection/cleaning, swapped 7500 for calibration, changed eddy clocks +2min, changed HMP fan but need more HMP shield bolts next time

2021-03-04
Sherman Wetland

I arrived at 9:30 PST. It has now been a year since the start of COVID shelter-in-place orders, but vaccines have started rolling out to more people so maybe by the next 7500 swap, we'll have some new social expectations. It was a mild and calm day with blue skies and hazy horizons. Lots of birds in the air and in the water. There are some old bunches of green tules still sticking around, and some new cattails coming up out of the water that were at least 20cm tall. The staff gauge read 98 cm.

I downloaded met, camera, USB GHG, and miniDOT data. I swapped the desiccant for the miniDOT and water level sensors. The conductivity sensor orifice looked clean. I cleaned flux and rad sensors. The reservoir was Â¾ full; I refilled it.

I swapped LI-7500s for calibration: sn 0065 came down and sn 0035 went up. After the swap, I uploaded a new config file and updated the pressure coefficient. I also changed the eddy clocks from 9:45 to 9:47 to match the laptop time. I reset the 7550 box and checked that the USB was logging, the 7700 was connected, and the times still looked good. I forgot to write the GHG numbers after the swap, but they were reasonable.

The HMP fan was dead so I swapped it out but dropped one of the HMP bolts in the process. This shield has only 1 bolt now. Next time to bring: replacement HMP45 shield with a 24V fan inside, wire strippers to re-strip fan power cable, new screw terminal with grease on the screws terminals.

LI-7500 readings (sn 0065 --> sn 0065 after cleaning):
CO2 433ppm --> 435
H2O 386ppm --> 394
T 13.4 --> 14.1
P 102.4kPa --> 102.5
SS 108--> 110
LI7700 readings:
CH4 2.08ppm
RSSI 60-->80 after cleaning

I left at 10:40 PST.

0 photos found

7 sets found

Can't check MBWPEESWGT_mixed
Can't check MBEEWPSWEPGT_cam
16 SW_met graphs found