Field Notes

Sherman Wetland: 2021-04-15 17:30:00 (DOY 105)
Author: Daphne Szutu
Others:

Summary: Regular data collection/cleaning, conductivity sensor out of the water--fixed, removed intercomparison sonic, changed GHG columns back to normal, dropped desiccant jar in the water

2021-04-15
Sherman Wetland

I arrived at 17:30 PDT. It was breezy, sunny, and mild. The staff gauge read 88cm. This was the first site visit in a month because I didnâ€™t get to Sherman Island 2 weeks ago. A helicopter alternated between hovering and flying back and forth over Antioch (maybeâ€”it was hard to gauge how far away it was).

Camilo, Ariane, and Pattyâ€™s student Julie were also at the wetland doing CH4 hotspot measurements in the mudflats and they stopped by around 18:00 to get the LGR data.

The conductivity sensor was out of the water and pulled all the way up to the boardwalk, probably by Camilo/Ari when they were getting their inflatable boat in the water earlier today. I lowered the sensor into the water.

I removed sonic sn 153805 which was here for an intercomparison after Joe repaired it post its BC dunk. This sonic data had been stored in the 7700 aux columns, and I changed the GHG columns to remove these 4 data columns. I reset the box and checked that the 7700 was connected, the USB was logging, and the GHG columns and eddy clocks looked good.

I downloaded met, camera, USB GHG, and miniDOT data. I cleaned flux and rad sensors. The wash reservoir was 1/2 empty; I refilled it. I scrubbed the staff gauge and changed the minidot and water level sensor desiccants. I dropped one of the desiccant jars in the water by the miniDOT, and Iâ€™ll have to get it next time with waders. Hopefully it will stay afloat since then.

LI-7500 readings:
CO2 404ppm
H2O 423ppm
T 20.8C
P 101.5kPa
SS 94--> 98 after cleaning
LI7700 readings:
CH4 2.0ppm
RSSI 41--> 82 after cleaning

I left at 18:15 PDT.

7 photos found

siwetland_2021_04_15_094405.jpg ( 2021-04-15 09:45:36 ) Full size: 1296x960
Camilo, Ari, and Julie sampling open water location