Field Notes

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East End: 2025-01-15 14:05:00 (DOY 15)
Author: Daphne Szutu
Others: Joe, Kuno

Summary: Swapped 7500 for calibration, LWin gaps - moved to different mux channel, removed old solar scaffolding from wetland

2025-01-15
East End

Joe, Kuno, and I arrived at 14:05 PST. It was cool and sunny with hazy horizons. The staff gauge read 53cm.

Kuno cleaned flux and rad sensors and swapped out the HMP shield for one that had fresh bolts and nuts. The wash reservoir was 1/2 full; we refilled it. Joe removed a piece of rusting scaffolding from the wetland that was part of the old solar structure. It’s on the boardwalk waiting to be cut up and recycled.

I downloaded met, cam, and USB GHG data. PARin doesn’t have gaps anymore after I moved it to a new mux channel. LWin still has gaps though after I redid the wiring last time, so today I moved it to a different channel, from mux 8 to mux 20. I added a few jumpers to the many empty mux ports, but I need about 6 more jumpers. From mux 1-20, we’re only using about 8 of the channels because of gaps in the earlier channels.

We swapped the LI-7500A for calibration: sn 75H-2669 came off and sn 1594 went on. I uploaded a new config file and updated the pressure coefficient. The 7550 software froze while I was updating the pressure coefficient, so I had to reset the box and redo the pressure coefficient change. I then changed the eddy clock -2min from 14:22:40 to 14:20:30 PST to match the laptop time. The 7550 software froze a second time, so I reset the box, set the clock again, and restarted logging. All seemed fine after that.

Kuno measured the surface water conductivity.
Surface, 793uS, 4.5C

75H-2669 old read: 435ppm CO2, 390mmol/m3 H2O, 19.5C, 102.2kPa, 94SS
1594 fresh read: 451ppm CO2, 307mmol/m3 H2O, 19.5C, 102.2kPa, 95SS
The 7700 read: 2.3ppm CH4, 35RSSI—80 after cleaning

We left at 14:45 PST.

0 photos found

11 sets found

14 EE_met graphs found