Field Notes

Mayberry: 2024-02-28 12:10:00 (DOY 59)
Author: Daphne Szutu
Others: Joe

Summary: Water level lower, cattails coming up, attempted all porewater sippers and got 4 samples

2024-02-28
Mayberry

Joe and I arrived at 12:10 PST. It was clear, sunny, and warm. The water level has gone down again and looks very brown. The staff gauge read 14cm. There are lots of green cattails coming up here, especially on the channel edges and immediately northeast of the scaffolding, where the “water” radiometers used to be measuring. Eventually our floating bucket will be in cattails, not in open water.

The wash was 2/3 full; we refilled it. Joe cleaned flux and rad sensors. I downloaded met, cam, and USB GHG data. I downloaded miniDOT data and swapped its desiccant. I checked the Campbell conductivity sensor as part of its routine check every 3 months: there was a little mud in the orifice that I pushed out. I raised the sensor a bit to keep it out of the mud and tightened the ziptie it’s hanging from.

Joe tested all of Kyle's recently installed porewater sippers. He was able to get enough sample from 4 sippers: Green (50cm) and Black (40cm) depth from the Red and Black profiles. None of the other depths worked, and nothing from the Blue profile. We need about 30ml of sample total: 5-10ml to pre-rinse the probe and 20-25ml to sample.

Sample (Profile-Depth), Temperature-compensated conductivity, Temperature, Notes
Surface, 6.22 mS, 17.7 degC
Red-Green, 9.64 mS, 19.1 degC
Red-Black, 8.53 mS, 21.2 degC, Sample was sitting in sun for a minute before measuring so temperature is probably warmer than the porewater in the soil
Black-Black, 12.38 mS, 18.1 degC
Black-Green, 9.13 mS, 20.3 degC, Sample was sitting in sun for a minute before measuring so temperature is probably warmer than the porewater in the soil

The 7500 read: 426ppm CO2, 259mmol/m3 H2O, 17.2C, 101.1kPa, 101SS—102 after cleaning
The 7700 read: 2.0ppm CH4, 43RSSI – 72 after cleaning

We left at 12:50 PST.

0 photos found

11 sets found

7 MB_flux graphs found