When: Date: 10/24/2007 , Day: 297 , Watch Time: 10:30am .
Where: Tonzi/Vaira Ranch
Who: Siyan, Xingyuan
Weather: clear, hot, small wind
Phenology: Mr. Tonzi’s pond was completely dry. 90% oak leaves fell. Grasses germinated but only under litters. It looked still yellow, though. I was captured on the on-site camera.

Summary

1. CO2 tank is very low (~500 psi).
2. Swapped Li-7500 on the three towers.
3. Downloaded data at Tower, Floor, and Vaira. Three EC systems worked well.
4. Took spectrometer measurement at Vaira and Tonzi.
5. Xingyuan took TDR probe measurement and worked on sapflow sensors.

Vaira_Grass Site

1. Fence and gate power: 12 v.
2. Panel and Batteries: 13.4 v; 8.6 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
Path/File name	D:\Data\V07_ 297 .flx D:\Data\VR07 .raw
	mean	std		mean	std
w	0.30	0.203	Ts	28.9	1.497
u	-1.07	0.409	H2O	1.77	0.033
v	0.81	0.661	CO2	1.68	0.022
			Tc	29.2	0.166

1. download data
2. swap Li-7500 (remove SN# 41; install SN # 73)
3. check the fans of air temp. and relative humidity sensors at Vaira. OK.
4. Check MD-9 system connections. OK.
5. Closed gate and set up fence.

Tonzi_Tower Site

1. Fence and gate power: >12 v.
2. Panel and Batteries: 14.0 v; 0.0 amps; 4.9 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
Path/File name	D:\Data\T07_ 297 .flx D:\Data\TW07 .raw
	mean	std		mean	std
w	0.27	0.57	Ts	22.593	0.978
u	1.05	0.81	H2O	2.609	0.033
v	1.3	0.81	CO2	1.941	0.014

1. downloading data
2. swaping Li-7500 Analyzer. (Remove SN# 418 ; install SN# 976 )
3. check the fans of air temp. and relative humidity sensors on the tower and the floor.
4. Check calibration cylinders;

CO₂ 500 psig; flow 20 psi.
N₂ 1000 psig; flow 20 psi.
Manually calibrate Li-800. Following Ted’s instruction: H:\IoneSavanna_2004\Tower_2004\CO2Profile\LI800_Calibration_Procedure_2Nov04.txt
Is the pump running‌ Yes

1. CR10X7 – CO₂ profile

397	433	399	397.9
949	942	943	942.6
45.2	45.2	45.3	45.2
49.9	49.9	49.9	49.9

-0.736	424.7
954.1	951
44.6	44.
49.8	49.7

How to check the CO2 values‌ Click “Ports/Flags” button to see which ports or flags is setting high. Pressure should be less than ambient value. When Flag 8 is high, it may indicate that RRR’s battery is low.

1. close gate and set up fence. OK.

Toniz_Floor Site

1. Fence and gate power: 12 v.
2. Panel and Batteries: 13.3 v; 14.3 amps; 3.2 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\F07_ 297 .flx D:\Data\FL07 .raw
	mean	std		mean	std
w	-0.11	0.241	Ts	23.7	0.493
u	-1.06	0.278	H2O	2.47	0.046
v	0.74	0.593	CO2	9.54	0.023

1. downloading data
2. swaping Li-7500 Analyzer. (Remove SN# 35 ; install SN# 65 )
3. Check MD-9 system connections. OK.
4. Soil CO₂ profile: probes are in the lab for calibration.
5. Close gate and set up fence. Yes.

Soil Moisture

vaira	57318a				7933dee
0-15	3.9	3.6	3.9		8.8	9.7	9.4
15-30	5.1	4.8	5.4		6.9	7.2	6.6
30-45	10.1	10.1	10.1		11.5	11.5	11.5
45-60	12.5	12.8	12.2		16.8	15.3	15.3

1. Close gate and set up fence.

Tonzi
Dendrometer
Date	Day	Tag #	Reading (cm)
10/24/2007	297	71	Broken
		72	2.2
		77	Broken
		78	Broken
		79	Broken
		245	6.5
		248	-0.1
		250	4.1
		255	4.3
		‌252‌	Missing
		102	4.0