Field Notes

East End: 2023-01-06 15:30:00 (DOY 6)
Author: Daphne Szutu
Others: Dennis

Summary: Regular data collection/cleaning, swapped 7500 for calibration, losing power sporadically, wasp sting when handling boardwalks, storms this week and more rain to come

2023-01-06
East End

Dennis and I arrived at 15:30 PST. The main channel running to the pumphouse seemed higher than before, and there was a “Rental Power” trailer parked by the pumphouse. We again drove through the small lake at the gas pad south of our tower. It was cool and overcast and the canopy has been blown down by the recent storms. We’ve had a string of atmospheric river storms since late December. More storms with potentially high wind are expected this weekend and next week.

The staff gauge read 32cm.

While we were here, we could hear lots of small birds, a frog, and even an owl.

Earlier this week we had removed the upper boardwalk in preparation for the storms. Dennis and I hefted the boardwalk back up onto the tower. Unfortunately there were a few wasps underneath the boardwalk so I got stung on the left wrist, right between my sleeve and my glove. One of those sting relief pads with lidocaine helped with the pain.

I downloaded met, cam, USB GHG, and miniDOT data. I swapped the miniDOT desiccant. The NDVI data was NAN and its power plug was hanging loose by the power strip. Not sure how that happened. I plugged it back in and its data came back on.

The reservoir was empty; Dennis refilled it. We still need to check if the reservoir or in-line filter is leaking.

I forgot to check the conductivity sensor orifice as part of its routine check every 3 months.

We are losing power sporadically here, and have lost about 7 full days in the past month. Maybe a loose connection somewhere. We are also planning on adding another half level of scaffolding to the solar panels to get them higher above the canopy.

We swapped 7500s for calibration: sn 75H-2667 came off and sn 75H-2669 went on. I didn’t write down before-swap numbers before Dennis unplugged the old sensor, but the after-swap numbers look ok. I updated the config file, updated the pressure coefficient, synched the eddy clock to the laptop clock (by ?? seconds) and reset the 7550 box. All looked ok.

Sn 75H-2669 read: 424ppm CO2, 460mmol/m3 H2O, 12.5C, 102.2kPa, 99SS
The 7700 read: 2.2ppm CH4, 21RSSI– 77 after cleaning

Dennis ziptied the upper boardwalk to the tower so we wouldn’t have to lower it again. We left around 16:00 PST.

0 photos found

11 sets found

14 EE_met graphs found