Field Notes

Mayberry: 2025-03-07 12:00:00 (DOY 66)
Author: Joe Verfaillie
Others:

Summary: 7700 wash head off - reattached, RH/T fan might be dead, miniCH4 reporting -10 - removed, tried to cut up old scaffolding - need plan B.

Mayberry
2025-03-07

I arrived at about 12:00 PST. It was clear and sunny but a cold wind was blowing. The levees and upland areas are super emerald green with tall weeds but the wetland is still brown, even the phragmites that usually get green before the tules and cattails. The water level was 60.0cm at 12:32 PST.

At the tower, the wash box was empty because the spray head was left off after the 7700 calibration last time. I refilled the wash box and reattached the spray head. I think part of the nozzle cracked when I pushed it on but I did a manual spray and spin and it seemed to function okay. I collected the met, flux and camera data. I had to set up a new data logger connection on the TZ/VR laptop and collected data by date (from 2/19). The phenocam password is InsertTheRealPassword.
The 7500 read: 428.0ppm CO2, 265.7mmol/m3 H2O, 17.3C, 101.3kPa, 106.5SS - 107.7 after cleaning
The 7700 read: 2.11ppm CH4, 22.8RSSI - 71 after cleaning

I cleaned the eddy sensors but forgot the radiometers and think maybe the phenocam might have needed cleaning. I can check the data.

I think the RH/T fan is dead. I didn't try to replace it partly because it was windy and I think is was replaced recently - want to check the notes.

I collected the minDot data (I didn't have new desiccant). The Eosense CO2 has started reading again - need to look at that data to decide what to do.

I didn't have the salinity meter because it was with Daphne and Arman so no salinity data today.

I downloaded the miniCH4 data but similar to the one at the GT channel it had started reading -10 for CH4 but everything else seemed okay. I went to remove it and found that it had fallen out of its mounts and the sensor end was probably on the bottom. I tried to get a reading in the air but couldn't figure out how to do that. I think setting it for continuous readings might be the easiest way. Anyway I brought it in for testing.

I didn't find a tape measure in the backup field kit so couldn't measure the heights of the radiometers. I took a photo that I might be able to measure from.

I tried to cut up the old scaffolding with a grinder blade on the battery powered skill saw. It was very loud and very slow - I might be faster with a hand held hack saw.

I took some photos of the solar panels and pushed some weeds down around them. I think using the pipe mounts from West Pond that I have been unable to get the fittings off might be a good way to remount the panels here.

I left at about 13:10.

Looking at the camera photos back in the lab, the lens was dirty starting Feb 22. Clean next time.

0 photos found

11 sets found

7 MB_flux graphs found