Field Notes

Sherman Wetland: 2018-11-01 14:45:00 (DOY 305)
Author: Daphne Szutu
Others: Dennis, Kuno

Summary: Regular data collection/cleaning, downloaded miniDOT, replaced eosGP CO2 probe, 7700 clock sync error

2018-11-01
Sherman Wetland

Dennis, Kuno, and I arrived at 14:45. It was sunny and breezy with thin clouds. It was dry under the tower. Wildlife report: spiderwebs everywhere, many bird sounds, and some otter poop in the spaces of the wooden lattice, but at least we can step on the lattice to avoid it. PG&E will be removing a transformer from a power pole NE of the tower, but it shouldnâ€™t affect us.

The water level was 52 cm. Kuno also measured the water level sensor inside the well: the sensor was 62cm below water level. Looking at the data back in the lab, the water level sensor was put back in a different place, about 32 cm higher than before.

Kuno cleaned the flux and rad sensor. The wash reservoir was 1/5 empty; I refilled it.

I downloaded met, camera, and USB GHG data. I added an eosGP CO2 probe (sn GP20140084). Kuno installed it by the 3rd post (same post as the miniDOT) in a shallow water pool. The previous CO2 probe was installed off of the 2nd post, but thereâ€™s no water there at the moment.

There was a 7700 clock sync error that was not solved by the usual fix of resetting the 7550 box. I resolved the error by setting the 7700 clock from automatic to slave. I reset the 7550 box, and then couldnâ€™t connect the 7550 software until I restarted the laptop. After finally connecting to the 7550, I confirmed that the 7700 was connected and that there were no clock sync errors.

LI-7500 readings:
CO2 411ppm
H2O 580ppm
T 27.1C
P 101.9kPa
SS 97-->98 after cleaning

LI7700 readings:
CH4 2.13ppm
RSSI 57 --> 82 after cleaning

We left at 15:35.

1 photos found

siwetland_2018_11_01_124405.jpg ( 2018-11-01 13:51:58 ) Full size: 1296x960
Bird in 7700 path