Field Notes

Hill Slough: 2021-08-04 07:40:00 (DOY 216)
Author: Daphne Szutu
Others: Carlos

Summary: Regular data collection/cleaning, very windy and cold, new staff gauge with imperial units

2021-08-04
Hill Slough

Carlos and I arrived at 7:40 PDT. It was very windy with clear skies and visible fog over the hills and it felt colder than the 16C (60F) that the sensors were reporting. There was a new staff gauge installed on the southern side of the boardwalk. The gauge is in feet and the 4 ft mark is at ground level. There was no water in the ditch under our boardwalk.

I downloaded met, camera, and USB GHG data. I downloaded FD data and cleared its memory. Carlos cleaned the flux and rad sensors; the LWin sensor was dirty. We topped off the wash reservoir.

LI-7500 readings:
CO2 393ppm
H2O 600ppm
T 15.9C
P 101.5kPa
SS 100 --> 100 after cleaning
LI7700 readings:
CH4 1.9ppm
RSSI 47 --> 71 after cleaning

We left at 8:10 PDT.

1 photos found

20210804HS_Staffgauge.jpg ( 2021-08-04 07:55:04 ) Full size: 1440x1920
New staff gauge probably installed by CDFW by the Hill Slough enclosure. The bottom of the staff gauge is at 4', which is our approximate elevation asl.