Field Notes

Twitchell Alfalfa: 2017-02-14 13:32:00 (DOY 45)
Author: Daphne Szutu
Others: Sam Chamberlain

Summary: Swapped HMP60, collected eosense forced diffusion data, otherwise regular data collection/cleaning

We arrived at 13:35. It was sunny, mild, and mostly clear. There were hundreds of geese in the field to our east. At some point while we were there they were all startled into flight. There are many holes by the tower legs. We should bring a shovel next time to try to fill them in.

The road approaching the alfalfa field and the ditch road were very muddy, so we parked by the road about 100m before we usually turn into the ditch and then walked to the tower. There were sheep in our footprint.

Sam cleaned the radiation and 7500 sensors. He also took soil respiration measurements.

I collected the met, soil CO2, USB GHG and camera card data. On the soil CO2 logger, STC12 = NAN and STC14 = NAN

We collected the eosense forced diffusion data, cleared the data, and power-cycled the sensor.

I swapped the HMP60 and attached the fan to 24V power. The new HMP60 read AirT = 17.44 and RH = 60.34. Some of the cables going to the datalogger were rotting; we taped some of them up with electrical tape, but ran out of electrical tape before we covered all of them.

The 7500 read:
CO2 415.5 ppm
H2O 543.8 mmol/m3
T 8.9 C
P 101.9 kPa
SS 102.85 --> 103.4 after cleaning

We left at 14:40.

0 photos found

7 sets found

Can't check TA_met
11 TA_met graphs found