Field Notes

Mayberry: 2017-05-10 14:25:00 (DOY 130)
Author: Daphne Szutu
Others: Elke Eichelmann, Joe Verfaillie, Isabel Reche

Summary: Data collection/cleaning, no flux data, downloaded water sensors and changed the height of the water sensors, HOBO conductivity data was full, re-wired some sensor wires to figure out intermittent NANs (atmospheric pressure, LWin/out), new CR1000 program

2017-05-10
Mayberry Wetland

We arrived at 14:25. It was sunny, windy, with high and thin clouds. The water level was much lower than last time. The bottom of the fluorometer was ~15cm above the water surface when we arrived.

We collected met, USB GHG, and camera data and cleaned the flux and radiation sensors. The USB GHG data only had 1 summary data with one line of data. The USB was loose in the interface box when I went to go swap it, so maybe that is why there were only a few hours of data on it. I didn't notice if the USB status light in the interface box had been blinking or not before I removed the USB.

CO2 404.4 umol/mol
H2O 620.8 mmol/m3
T 19.9 Celsius
P 101.5 kPa
SS 94.3 -> 95.1 after cleaning

LI7700 readings:
CH4: 1.88
RSSI: 31.7 -> 75.2 after cleaning

We downloaded the three miniDOTs and the HOBO conductivity sensor. Since the water level was so low, Joe adjusted the position of the sensors. The 3 miniDOTs (sn 1219, sn 1220, sn 1221) and 3 eos CO2 probes are now all set to the same height, ~10 cm below the water surface and ~20 cm above the sediment. Joe also lowered the HOBO conductivity sensor so it was in the water.

The HOBO conductivity sensor memory was full. We weren't sure if the new data automatically replaces the oldest data in the sensor's storage, so we left the sensor as is. In the future, re-launching the sensor after downloading data would clear the memory.

The atmospheric pressure and LW in/out data had been having intermittent NANs. To test whether the mux channels were faulty, I moved these sensors to different channels. I moved the PTB110 to channel 21 and moved the LWin and LWout wires to channels 19 and 20. I uploaded a new program to the CR1000 to reflect this new wiring.

Isabel took a few water samples at the fluorometer location.

We left at 15:10.

0 photos found

11 sets found

7 MB_flux graphs found