Field Notes

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Vaira: 2025-01-22 15:00:00 (DOY 22)
Author: Joe Verfaillie
Others: Kuno

Summary: Dry and mild, standard data collection, looked at RevBowen code but no change, moved Mark 3 to avoid shadows on BF3.

Vaira
2025-01-22

Kuno and I arrived at about 15:00 PST. It was clear, sunny and mild with almost no wind. It's been dry for the last 20 days or so. No puddles on the road, some water in the water hole. The cows have beat down the grass a bit.

Kuno did the well depth. I tried to do spectral but getting a reference value that didn't over or under expose the sample data was hard due to low sun angle I think.

I collected the data at the tower: flux, met, camera, and FD chambers.
The 7500 read: 429.3ppm CO2, 350.9mmol/m3 H2O, 16.6C, 100.6kPa, 100.7SS - 101.3 after cleaning

I looked at the RevBowen calculations in the data logger code but need to double check with Carlos that I've got the correct equations.

I moved the Mark 3 arable to the next fence most to the north to try to avoid shading the Diffuse PAR sensor. I think the radiometer tower still might case a shadow on in the late winter afternoons. It shouldn't mess with diffuse PAR but I found dips in total PAR that needed cleaning.

We left at about 15:30 PST

Field Data

No tank data

No VR Well data found

No TZ Moisture Point data found

No VR Moisture Point data found

No TZ grass heigth found

No VR grass heigth found

No VR Tree DBH found

No water potential data found

No VR Grass Biomass data found

No VR OakLeaves Biomass data found

No VR PineNeedles Biomass data found