When: Date: 8/17/2006 , Day: 229 , Watch Time: 10:51 .
Where: Tonzi/Vaira Ranch
Who: Siyan, DDB, Jessica, YoungRyre, a reporter, and a photographer
Weather: clear, hot, breeze sometimes
Phenology: dead grass, decomposed, dry soil. Todd Dawsom’s lab were collecting air (CO2/H2O) samples from the tower, overnight, every two hours, and measuring leave water potential, branch samples for C13, leave respired CO2 for C13.
Summary

1. I was planning to swap Li-7500 on Floor, but Vaira’s Li-7500 was broken on D227. DDB comments to always bring an extra set of Li-7500, in case something goes wrong.
2. Vaira’s Raw data stopped at VR062271300.raw. Looks like accurate thermal couple hasn’t been installed yet. After it is installed, RAW.ccp need update.
3. Tower and Floor worked well. Need to swap Floor’s Li-7500 next visit.
4. Correct PC and datalogger time with GPS at tower and floor sites.
5. samples of oak leaves and branches for SLA
6. no soil moisture measurement since TDR machine sent back to company for calibration
7. spectrometer measurement at Tonzi and Vaira

Vaira_Grass Site

1. Fence and gate power: >12 v.
2. Panel and Batteries: - v; - amps; - 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
Path/File name	D:\Data\V06_ .flx D:\Data\VR06 .raw
	mean	std		mean	std
w	.4		Ts	28.6
u	.19		H2O	-.37	Too low
v	.77		CO2	.37	Too low

1. downloading data
2. swaping Li-7500 Analyzer. (Remove SN# 65 ; install SN# 41 )
3. check the fans of air temp. and relative humidity sensors at Vaira.
4. Check levels of Radiation sensors, clear up surfaces.
5. Closed gate and set up fence.

Tonzi_Tower Site

1. Fence and gate power: >12 v.
2. Panel and Batteries: 13.4 v; 9.5 amps; 1.9 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	10:57:22
Path/File name	D:\Data\T06_229 .flx D:\Data\TW0622910000.raw
	mean	std		mean	std
w	0.53	0.995	Ts	25.6	1.919
u	4.08	1.599	H2O	2.47	0.043
v	-0.7	1.074	CO2	1.609	0.035

1. downloading data
2. check the fans of air temp. and relative humidity sensors on the tower and the floor. OK.
3. no CO2 profile running
4. RRR stopped. Battery 13.2. Reset button may be broken. DDB disconnected reset button and connected power to datalogger directly. Then, RRR started working again.
5. close gate and set up fence.

Toniz_Floor Site

1. Fence and gate power: >12 v.
2. Panel and Batteries: v; amps; 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
Path/File name	D:\Data\F06_ .flx D:\Data\FL06 .raw
	mean	std		mean	std
w	-0.12	.2	Ts	30.9	1.3
u	-.62	.5	H2O	1.8	0.02
v	2.75	.5	CO2	1.6	0.02

1. downloading data
2. Check MD-9 system connections: all good.

CR23X3 – floor-Met
CR23X5 – soil CO₂ profile
CR23X6 – tower-Met
CR10X2 – floor-Met
CR10X4 – sap-flow
CR10X7 – CO₂ profile
CR10X8 – wind profile

1. Soil CO₂ profile

Reading from datalogger

Panel temp		38.7
Battery voltage		12.88
CO2E_1	264	TCE_1	47	CO2W_1	396	TCW_1	29
CO2E_2	310	TCE_2	51	CO2W_2	607	TCW_2	26
CO2E_3	385	TCE_3	39	CO2W_3	1237	TCW_3	24
CO2E_4	469	TCE_4	31	CO2W_4	1200	TCW_4	26

Reading from panels of analyzers

depth	Open	order	depth	Tree	order
2cm (1%)	520	1	2cm (1%)	800	1
4cm	620	2	4cm	2370	4
8cm	790	3	8cm	1210	2
16cm	970	4	16cm	0.47%	3

1. Close gate and set up fence.