Field Notes

Mayberry: 2020-12-03 15:15:00 (DOY 338)
Author: Daphne Szutu
Others: Camilo

Summary: Regular data collection/cleaning, water samples for Isabel, fluorometer brushes seem fine, couldn't find fluorometer cap

2020-12-03
Mayberry

Camilo and I arrived at 15:15 PST. It was a hazy and still day. Weâ€™re now into month 9 of coronavirus shelter-in-place. The staff gauge read 27cm. I remember seeing mostly brown reeds from the levee road driving in, but from the camera photos it looks mostly green-yellow.

Camilo got in the water with waders to try to pick up the fluorometer cap I dropped last time, but couldnâ€™t find it. The cap shouldnâ€™t affect the readings one or another, but it was a convenient way to ensure the lenses stayed out of the mud. I checked the fluorometer brush locations before and after a cleaning cycle. Both times the brushes were well clear of the lenses. Looking at the data, there are some short periods in the last 2 weeks where the fluorometer data look normal and not noisy. Itâ€™s possible sometimes the brushes stop in different positions.

I downloaded met, cam, USB, and miniDOT data. I swapped the miniDOT and water level sensor desiccant. The wash reservoir was Â½ full; we refilled it. I collected 2 water samples for Isabel at 15:20 PST. I need to find more 20ml vials for her samples. Camilo cleaned flux and rad sensors. The lower 7700 mirror was generally dusty, although the edges were relatively clean.

LI-7500 readings:
CO2 442ppm
H2O 431ppm
T 16.9C
P 102.2kPa
SS 98-->101 after cleaning
LI7700 readings:
CH4 2.4ppm
RSSI 40--> 85 after cleaning

We left at 16:00 PST. At the end of the site visit I dropped my sunglasses in the water by the eddy post but didn't realize until we got back to campus.

7 photos found

20201203MB_FluorometerBrushes.jpg ( 2020-12-03 15:40:55 ) Full size: 1440x1920
Brushes before and after cleaning cycle were clear of lenses, so not sure why data has been noisy

20201203MB_HazySky.jpg ( 2020-12-03 15:53:57 ) Full size: 1920x1024
Clouds reflected in still waters