Field Notes

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Tonzi: 2004-01-08 09:50:00 (DOY 8)
Author: Dennis Baldocchi
Others: Jianwu, Matthias, Ilse

Summary: Tower PC dead of HD crash, Floor clocks falsely set ahead 20min reset later, Floor sonic temp high, Tower HMP fan dead, rain gauge under cross arm.

Where: Tonzi Ranch
When: Jan 8, 2004
Who: DDB, Jianwu Tang, Matthias Falk, Ilse Mercado-Ruiz

Arrived around 0950. It was a cloudy, damp day. Had rained overnight. Green grass, but short.

PC on the Tower was dead. Had died around day 5. Hard drive crash. We were able to save some data.
Cal gases, N2 400 psi, CO2, 1000 psi

Power, Tower 12.7 V, load 2.8 amp

Floor system
Battery 12v, solar generation 8.2amp, load 2.7 amp (battery recharge, plus running flux system).

Reset clocks with GPS. It seems I was not locked on to the satellite, so the GPS indicated that the PC time was off 20 minutes. I reset the time in error and corrected this latter in the afternoon. In the am GPS 10:46:20, PC 10:28:01.

In pm GPS 14:56:44, PC 1518, reset PC at 1458.
Lat: 38 25.903N
Long: 120 57.978W

Downloaded data

W: .12; u: 0.4;v:-.2;T: 24.0; q: 2.22;C: 2.1

Tsonic seems very high! Tair was about 12 C. Probably should swap out sonics.

Climbed Tower. Aspirator was dead. Rain gauge is under cross arm of tower. Exposure needs improvement.

Field Data

No tank data

No TZ 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 TZ Tree DBH found

No water potential data found

No TZ Grass Biomass data found

No TZ OakLeaves Biomass data found

No TZ PineNeedles Biomass data found