Field Notes

East End: 2023-08-08 14:10:00 (DOY 220)
Author: Daphne Szutu
Others: Robert

Summary: Regular data collection/cleaning, Decagon NDVI sensors tilted from bird activity

2023-08-08
East End

Robert and I arrived at 14:10 PDT. It was hot and sunny with a slight cooling breeze. The staff gauge read 73cm and the water surface was covered with duckweed. Robert noticed lots of leaf galls on the willow trees by our parking spot. Maybe half of the leaves were affected.

I downloaded met, cam, and USB GHG data. Robert cleaned flux and rad sensors and reported that the Decagon NDVI sensors were tilted and dirty, and the 4-way radiometer was covered in bird gunk (especially the LWin sensor). I think he straightened the Decagon NDVI sensors.

The 7500 read: 419ppm CO2, 801mmol/m3 H2O, 28.4C, 101.2kPa, 99SS--102 after cleaning
The 7700 read: 2.0ppm CH4, 53RSSI--84 after cleaning

We left at 14:25 PDT.

2 photos found

20230808EE_LeafGalls.jpg ( 2023-08-08 14:11:56 ) Full size: 1440x1920
Leaf galls on willow tree by boardwalk. Maybe half of the tree's leaves were affected, although most had fewer galls than the leaves in this photo.

20230808EE_NdviTilt.jpg ( 2023-08-08 14:13:27 ) Full size: 1440x1920
Decagon NDVI sensors were completely tilted, and there were feathers and some dried blood spots on the boom.