Field Notes

<--2022-09-16 10:50:00 | 2022-10-18 14:15:00-->
Other sites visited today: Hill Slough | Bouldin Alfalfa

Bouldin Corn: 2022-09-29 13:10:00 (DOY 272)
Author: Daphne Szutu
Others: Ari

Summary: Regular data collection/cleaning, no harvest yet, swapped FD chamber cable, slightly adjusted level of scaffolding

2022-09-29
Bouldin Corn

Ari and I arrived at 13:10 PDT. Tyler, Charlotte (new grad student taking over the chamber system), and several other Silver Lab members were on site testing the system and organizing their coils upon coils of tubing, wires, and conduit. It was warm, breezy, and without a cloud in the sky, although the horizons were starting to get hazy. No harvest yet for our corn field, and Tyler said he hasn't seen any movements in the fields around our area.

Lots of wasps buzzing around the tower. There was a sleepy group of them in the IRT box.

I downloaded met, cam, and USB GHG data. Not sure if I changed the eddy clock. I downloaded PA data and power cycled it. I downloaded the IRT data by swapping the microSD card and using CardConvert to convert the fast data to TOB1 and the slow data to TOA5. I still couldn't connect to the FD chamber today, so we tried it with a different eos cable from the lab. This new cable worked to connect, so we swapped out the old cable. I downloaded the FD data, and it seemed complete. I cleared its memory. Ari cleaned flux and rad sensors. The wash reservoir was 90% full; we refilled it.

We forgot to check/clean the precip bucket here--next time.

Ari noticed the northeast corner of the scaffolding was slightly leaning west toward the corn field. We tried to raise northwest corner to compensate, but it was difficult to turn the screw handle on the foot. The Silver lab helped us try to raise the north side of the scaffolding so there was less weight bearing down on the foot. We started hammering on the screw handle to get it to run, which worked for maybe 1/2 a revolution until the whole foot started turning. Then we noticed the whole northern side of the scaffolding was lifting up, which meant the northeast corner was staying at the same angle instead of getting more level. I realized belatedly that the tower was still tied down on all corners, which is why it was hard to lift the scaffolding and turn the foot. We released the northern tie-downs and tried to raise the northwest corner again. We made a bit of progress and decided to call it ok for now. I don't think the slight tilt will affect any measurements much. We tightened all the tie-downs again before leaving.

The 7500 read: 416ppm CO2, 680mmol/m3 H2O, 28.4C, 101.5kPa, 99SS -- 100 after cleaning
The 7700 read: 2.0ppm CH4, 46RSSI – 79 after cleaning

We left at 14:20 PDT.

0 photos found

6 sets found

17 BC_met graphs found