Field Notes

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Other sites visited today: Mayberry | West Pond | East End
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Gilbert Tract: 2022-08-03 10:20:00 (DOY 215)
Author: Daphne Szutu
Others:

Summary: Regular data collection/cleaning, warm/muggy, lots of dead/live ants in and around met box, no met data for 2 weeks from 7/13 to 7/25 but ok now maybe

2022-08-03
Gilbert Tract

I arrived to Flo at 10:20 PDT. It was relatively mild with a cool breeze and good visibility. The water level was middling and the tide was ebbing. I connected to the ADCP and saw the usual message about the sensor clock being off from the laptop time, but again the time on the data seemed fine. The software prompted me to calibrate the pressure sensor; I declined. I downloaded data and restarted data collection. I ran into Mckenna from USGS on the way out: they were reinstalling their EXO post that had been mysteriously knocked over.

I arrived at the main tower at 10:40 PDT. The weather was getting warmer and muggier. The staff gauge read 58cm at 11:40 PDT. There were tons of dead ants and some live ants in the met box. Lots of live ants outside of the box and on the scaffolding and cables by the box. I used canned air to clean out the dead ants from the box and left them some fresh mothballs before I left.

I downloaded met, cam, and USB GHG data. I cleaned flux and rad sensors and topped off the wash reservoir.

There was no met data since the last visit until the CR1000 mysteriously restarted itself on 2022-07-25 at 22:00. There was the full set of GHG and camera data. I inspected the pluggable power blocks in the met box and sprayed some dead ants out of the pluggable power strip and the CR1000 power plug. I checked all of the datalogger and mux screws; they were fine. Joe thinks something on the SDI-12 channels hung up the entire CR1000 until a power cycle on 2022-07-25 around 22:00 restarted everything.

Since there were no issues with flux or cam data, I don’t think it’s a general power problem, but the timing is suspicious because at the last visit, Ari and I had to shift the battery box back into a secure position on the boardwalk. Today I checked the battery terminals again and the charge controller connections—they all look snug and fine. There's no lock on the action packer but there is one on the charge controller enclosure.

I changed the eddy clock +30sec from 10:18:15 to 10:18:45 to match the laptop clock and restarted logging afterwards.

The dfPAR sensor still looked level, although I just eyeballed it because the level was not in the toolbox.

On the last visit, I changed the phenocam overlay from “testcam”to “gilberttract” and saved config through StarDot Tools. Checking today, the photos themselves still say “testcam,” even though the overlay seen through Stardot Tools says “gilberttract.” I connected to the camera directly through telnet to check the overlay file (overlay0.conf?)--it also says “gilberttract”. I rebooted the camera—not sure if I did that last time after changing the config.

The camera was connected directly to the datalogger. I wanted to manually trigger a photo to test the overlay, so I changed the cables around to connect both camera and datalogger to the Ethernet switch. However, I didn’t see any lights on the switch, even after confirming it was getting 5V (measured voltage on screw terminal on outgoing side of DC-DC converter). I brought the switch home and connected the cameras back to the datalogger. I checked a final time in StarDot Tools that the camera was running before I left.

The 7500 read: 390ppm CO2, 865mmol/m3 H2O, 25.2C, 101.2kPa, 89SS – 97 after cleaning
The 7700 read: 2.04ppm CH4, 33RSSI – 79 after cleaning

I left at 11:50 PDT.

Looking at the data back in the lab, TC+15cm on Profile C has much larger magnitude after the power cycle. Check its wiring next time (TC_temp18).

Water sensors still seem like they're out of the water at low tide. We can run the extension cable in a straight line instead of running along the shore to get a little more cable length out of our current setup.

1 photos found

gilberttract_2022_08_03_101405.jpg ( 2022-08-03 11:16:10 ) Full size: 1296x960
Daphne cleaning radiometers