Field Notes

When: Date: Dec. 15, 2004 , Day: 350 , Watch Time: 11:30am .
Where: Tonzi/Vaira Ranch
Who: S.M. and J. C.
Weather: very foggy on the way, partial cloudy on the site
Phenology: green grass and no-leave tree

Tasks

1. Check Flux systems and swap three Licor-7500s.
2. Spectrum measurements
3. Alex’s isotope samples
4. Measure soil moisture
5. Collect leave samples: Vaira grass, Tonzi understory grass

Tonzi_Tower Site

1. Fence and gate power: >12 v.
2. Panel and Batteries: 13.5 v; 0.0 amps; 4.0 amps.
3. Reading from Gillsonic screen before downloading data. (The value of H₂O and CO₂ should be in the range of 0 – 5 v.). Windows version

   Time	13:06:30
   Path/File name	Fl4_350.flx
   	mean	std		mean	std
   w	0.11	0.129	Ts	23.306	0.349
   u	-0.87	0.289	H2O	2.364	0.041
   v	-0.15	0.476	CO2	1.9	0.012

4. Download data. New computer was working well.
5. Remove sn 0035; install sn 0042
6. Check calibration cylinders;
   CO₂ 1000 psig; flow 10 psi.
   N₂ 600 psig; flow 4 psi.
7. Check the values of CR10X datalogger. Good.
8. Check the values of CR23X datalogger. Good.
9. close gate and set up fence.

Tonzi_Floor Site

1. Fence and gate power: >12 v.
2. Panel and Batteries: 12.5 v; 21.7 amps; 2.9 amps.
3. Reading from Gillsonic screen before downloading data. (The value of H₂O and CO₂ should be in the range of 0 – 5 v.)

   Time	13:06:30
   Path/File name	Fl4_350.flx
   	mean	std		mean	std
   w	0.11	0.129	Ts	23.306	0.349
   u	-0.87	0.289	H2O	2.364	0.041
   v	-0.15	0.476	CO2	1.9	0.012

4. Download data.
5. Reading from Gillsonic screen after downloading data or swapping Li-7500 Analyzer. (Remove sn 0065; install sn 0073)

   Time	13:44:21
   Path/File name	Fl4_350.flx
   	mean	std		mean	std
   w	0.29	0.161	Ts	23.612	1.014
   u	-1.16	0.383	H2O	2.179	0.03
   v	0.22	0.579	CO2	2.154	0.023

6. Closed gate and set up fence.