Field Notes

Mayberry: 2019-07-25 11:40:00 (DOY 206)
Author: Daphne Szutu
Others: Dennis, Alex, Josep Penuelas

Summary: Regular data collection/cleaning, water samples for Isabel, swapped PAR_water sensor, swapped Rnet_water sensor, swapped LI-7500A for calibration, downloaded miniDOT, swapped miniDOT batteries

2019-07-25
Mayberry

Dennis, our visitor Josep Penuelas, Alex, and I arrived at 11:40. It was sunny, warm, and mostly clear. The water level was 43 cm. Alex collected water samples for Isabel at 10:45 PST. The wash reservoir was mostly full; we topped it off.

We swapped the Rnet_water sensor because it had a broken wire: sn 990350 came down, and sn 990351 went up. The new Rnet_water reading was 9.8 mV. We also swapped the PAR_water sensor because it had been spiky since early July: sn 040412 came off and sn 010161 went on. The new PAR_water reading was 0.5 mV (90 umol).

We also swapped the LI-7500A for calibration: sn 75H-2182 came down, and sn 0042 went up. I uploaded a new configuration file, updated the pressure coefficients, and reset the box.

I downloaded met, cam, USB, and miniDOT data. This site has only the upper miniDOT; we should think about whether we still want a second miniDOT at this tower. We cleaned the flux and rad sensors. We attempted to clean the fluorometer, but there seems to be streaks of biological gunk dried on. We swapped the miniDOT batteries and the desiccant for the miniDOT and water level sensors.

The camera post pin needs a leash, and the Rnet water needs an additional small hose clamp. We used cable ties for now.

LI-7500 readings (sn 75H-2182 --> sn 75H-2182 after cleaning --> sn 0042):
CO2 407ppm --> 420 after cleaning --> 413
H2O 817ppm --> 596 after cleaning --> 731
T 29.8C --> 30 after cleaning --> 29.9
P 101.1kPa --> 101.1 after cleaning --> 101.0
SS 85--> 86 after cleaning --> 99
LI7700 readings:
CH4 1.95ppm
RSSI 30--> 83 after cleaning

We left at 12:50.

0 photos found

11 sets found

7 MB_flux graphs found