Field Notes

East End: 2018-01-31 10:50:00 (DOY 31)
Author: Daphne Szutu
Others: Elke, Kyle, Rory French

Summary: Regular data collection/cleaning, removed old SHF plate, installed 2 new SHF plates, lowered miniDOT sensor

2018-01-31
East End

We arrived at 10:50. It was sunny and cool with some thin, high clouds.

Elke refilled the wash reservoir; it was completely empty. The miniDOT was barely touching the water, so Elke lowered the sensor.

Elke cleaned the rad and flux sensors. The CO2 sensor was very wet and there was no "before cleaning" values. I collected met, camera, and USB data. I swapped the desiccant for the water level sensor.

LI-7500 readings:
CO2 *.* --> 445 ppm after cleaning
H2O *.* --> 599 mmol/m3 after cleaning
T ?? --> 14.6 C after cleaning
P ?? --> 102 kPa after cleaning
SS 0 --> 101 after cleaning

LI7700 readings:
CH4 2.4 ppm
RSSI 56 --> 73 after cleaning

Kyle removed the old soil heat flux plate, sn 00244. This sensor was wired to channel 14 and storing data to the "SHFP_Avg(3)" column. Its data had been changing by steps recently. Kyle installed 2 soil heat flux plates:

-sn 001604, wired to channel 12, SHFP_Avg(1) data column, in open patch left of rad boom
-sn 10822, wired to channel 13, SHFP_Avg(2) data column, to right of rad boom in vegetation

The plates were both reading slightly negative values (-0.1) as we left.

Elke adjusted the 7550 box position so that water would not pool in the lower lip of the cover.

We left at 11:20.

1 photos found

20180131EE_7550BoltSpacingMountClose.jpg ( 2018-01-31 11:20:52 ) Full size: 1440x1920
Close up picture of new mount of 7550 box at East End to prevent water pooling.