Field Notes

<--2025-01-02 10:30:00 |
Other sites visited today: Hill Slough
Phenocam link: Searching...

Rush Ranch: 2025-01-16 11:00:00 (DOY 16)
Author: Daphne Szutu
Others: Joe, Carlos, Nico

Summary: Replaced 7700 wash power cable--spray now works!, only a few days of photos--need new camera card, new cross braces for the tower, barometer bad--need a new sensor, updated program to save AM25T reference temp

2025-01-16
Rush Ranch

Joe, Carlos, Carlos’s friend Nico from the USDA, and I arrived around 11:00 PST. Matt gave us permission to drive out to the tower because we haven’t seen much rain since January 2nd. We found the dropped Apogee LW sensor leaning against one of the wooden fence posts next to our tower. It was sealed in its plastic bag and looked fine. There was fresh cow poop near our tower—not sure how the cows got in.

Carlos gave Nico a tour of the tower. Joe worked on cutting and drilling to create new cross braces for the tower. Joe replaced the broken cross brace on the lower level, but it still needs a 2.5” 1/4-20 bolt. He also added one horizontal cross-brace at the top for better safety. The drill died so we’ll need to add the second horizontal cross-brace next time. Joe cut his thumb.

We haven’t been able to get the 7700 spray to work and today I tried a brand new 7700 wash power cable. The 7700 spray worked! I guess the last two wash power cables we tried were bad. Joe re-organized the cables and tubing.

Carlos cleaned flux and rad sensors. He noted that the sonic transducers were poopy. I downloaded met, cam, and USB GHG data. I moved the ethernet connector for then 7550 box from the power strip box to the met box, so now all computer connections can be made from the met box. The camera card only had 2 days of photos; there are some 32GB cards in the lab that we can try to replace this old card. The air pressure data from the barometer data still looks too low. I confirmed that the coefficients in the datalogger program were correct, so we decided we need a new barometer. We might have a spare in the lab. I updated the CR1000 program so it saves the AM25T reference temperature.

The 7500 read: 444ppm CO2, 398mmol/m3 H2O, 14.8C, 102.1kPa, 100SS
The 7700 read: 2.2ppm CH4, 30RSSI — 84 after cleaning

We left around 12:15 PST. It felt weird to be going home so early in the day.

0 photos found

3 sets found

1 RR_cam graphs found