Field Notes

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Other sites visited today: Mayberry | East End
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Gilbert Tract: 2025-03-24 10:00:00 (DOY 83)
Author: Carlos Wang
Others: Dennis

Summary: Regular data download and site maintenance, downloaded data from ADCP + mini CH4

Dennis and I arrived at ~10:00 PST. It was sunny and warm with slight breeze. There were quite a bit of overgrowth when accessing the tower, and Dennis cleared out some plants. The staff gauge reads 90cm at 10:14 PST. Dennis also collected water samples for the upcoming school fieldtrip.

At the tower, I dowloaded MET, GHG, camera, and miniCH4 data. Dennis cleaned MET and flux sensors. Dennis also cleaned the diffuse PAR sensor and said the precipitation bucket was clean. The LI-7700 reservoir was 2/3 full, and we refilled it. I tried to download the Song Meter Micro data, but it seems that the batteries need to be replaced as it was not responding. As I was checking the MET data, I noticed TA had many NaNs. The live data also showed NaNs (for TA and RH) after we inspected and cleaned the sensor (removed from the raidation shield). I found a loose wire and reconnected it, but there was still no data. Sensor needs to be replaced.

7500 read: 458ppm CO2, 579mmol/m3 H2O, 21.3 C, 102kPa, 98SS --99 after cleaning
7700 read: 2.3ppm CH4, 41RSSI – 81 after cleaning

Dennis measured the surface water conductivity, but I forgot to tell him that it needs to be switched to "compensated" mode. We did measure the DI conductivity. DI - 1.7 uS, 23.8C and surface - 213 uS, 14.2C

At the channel, we downloaded ADCP data and there waas data upto 03/21 21:55. It took a while for us to connect to the sensor, but we finally were able to connect to it by power cycling it twice. There's not much weed, but we pull the ADCP out and cleaned it anyways. We also downloaded EXO data. The data looks good, but with NaNs for 02-18 to 03-07.

We left the field at around 12:00 PST.

0 photos found

8 sets found

Can't check MBWPEESWGT_mixed
Can't check MBEEWPSWEPGT_cam
16 GT_met graphs found