Field Notes

Mayberry: 2024-03-14 13:25:00 (DOY 74)
Author: Joe Verfaillie
Others: Arman

Summary: Windy, levees mowed, can't find cause of water level NANs, Some sipper data, lower water level

Mayberry
2024-03-14

Arman and I arrived at 13:25 PDT. It was clear and sunny with a brisk wind from the north. The wetland is still mostly brown but there is some green along the edges. The water level is low at 11cm. I walked through the reeds to the southeast of the tower to find enough water to fill a jug for the school field trips next month. All the levees have been recently mowed.

Arman chased a bunch of wasps out of the wash reservoir to refill it and we lowered the eddy sensors for cleaning. I collected the met, flux, and camera data.
The 7500 read: 417.3ppm CO2, 236.2mmol/m3 H2O, 18.6C, 101.0kPa, 101.0SS
The 7700 read: 2.0ppm CH4, 48.5RSSI – 71.9 after cleaning

I checked on the depth reading from the CTD/HYDROS21 sensor that is NAN. I didn’t see anything wrong with the program. The sensor was probably laying in the mud. I rinsed it off and raised it a little. The temperature and conductivity look fine so I think it is a broken pressure sensor. I thought about testing it with the SDI-12 terminal but that meant unwiring things and changing programs. Easier to bring another data logger or that SDI-12 dongle next time.

While I was messing with the water pressure, Arman got conductivity from the sippers:
Black-green, 9.46mS, 16.3C
Red-black, 9.11mS, 18.7C
Red-green, 9.56mS, 17.2C
Surface, 6.70mS, 14.6C

We left at 14:00

0 photos found

11 sets found

7 MB_flux graphs found