Field Notes

<--2012-07-10 10:00:00 | 2012-08-08 10:30:00-->
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Tonzi: 2012-07-25 05:30:00 (DOY 207)
Author: Siyan Ma
Others:

Summary: Standard fieldwork, swapped 7500s at all towers, removed CO2 profile pump.

When: Date: 7/25/2012 , Day: 207 , Watch Time: 5:30 am .
Where: Tonzi/Vaira Ranch
Who: Siyan
Weather: clear, sunny, hot
Phenology:

Summary

Measured pre-dawn water potential of oak leaves and pine needles: ~-30 bar for oak; ~-10 bar for pine.
checked and downloaded data at Tower, Floor, and Vaira
Swapped Li-7500 at TZ Tower, Floor, and Vaira.
Turn off the CO2 profile system because the pump might not work properly. The pump was removed and brought back to the lab.
Read dendrometers
Measured soil moisture
Measure groundwater wells

Date	DOY	Location	Depth without the black thing (feet)
7/25/2012	207	Floor	25.7
		Tower	30.4
		roadside	34.9

Vaira_Grass Site

Fence and gate power: 12 v.
Panel and Batteries: 12.4 v; 0.4 amps; 2.6 amps.
Reading from Gillsonic screen before downloading data. (The value of H₂O and CO₂ should be in the range of 0 ï¿½ 5 v.)

Vaira Gill sonic plots screen before downloading data

Swap Li-7500: Remove sn 0042 install sn 0041
Downloaded data: raw, met, soil CO2 profile, pictures(2).
Check the fans of air temp. and relative humidity sensors at Vaira. YES!
Check MD-9 system connections YES!
Check CR23X with two multiplexers

Screen shot of Vaira soil co2 data logger table

Check levels of Radiation sensors, clear up surfaces. Sorry, forgot!
Check rain gage, make sure not clogged. Sorry, forgot!
Closed gate and set up fence. YES!

Tonzi_Tower Site

Swap Li-7500: Remove sn 1594 install sn 0976
Fence and gate power: 12 v.
Panel and Batteries: 12.2 v; 0.0 amps; 4.4 amps.
Reading from Gillsonic screen before downloading data. (The value of H₂O and CO₂ should be in the range of 0 ï¿½ 5 v.)

Floor Gill sonic plots screen before downloading data

downloading data YES!
Swap Li-7500: Remove #1594; install #0976.
check the fans of air temp. and relative humidity sensors on the tower and the floor. YES!
Check rain gage, make sure not clogged. YES!
Turn off the CO2 profile system because the pump might not work properly. The pump was removed and brought back to the lab.
close gate and set up fence. YES!

Toniz_Floor Site

Swap Li-7500: Remove sn 0035 install sn 0073
Fence and gate power: 12 v.
Panel and Batteries: - v; - amps; - amps. (about 7:00 am local time)
Reading from Gillsonic screen before downloading data. (The value of H₂O and CO₂ should be in the range of 0 ï¿½ 5 v.)
downloading data YES!
Check MD-9 system connections YES!

CR23X3 ï¿½ floor-Met
CR23X6 ï¿½ tower-Met
CR10X2 ï¿½ floor-Met
Screen shot of soil moisture data logger table

Screen shot of floor met data logger table

Screen shot of tower met data logger table

Screen shot of sap flow data logger table

Soil CO₂ profile: CR23X5 ï¿½ soil CO₂ profile

Screen shot of soil co2 data logger table

Close gate and set up fence. YES!

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2012-07-25	TZ_floor	25.7
2012-07-25	TZ_road	34.9
2012-07-25	TZ_tower	30.4

No TZ Moisture Point data found

No VR Moisture Point data found

No TZ grass heigth found

No VR grass heigth found

Tree DBH

Date	Tag#	Reading (mm)
2012-07-25	1	21.6
2012-07-25	102	14
2012-07-25	2	15
2012-07-25	245	10.4
2012-07-25	3	19
2012-07-25	4	3.3
2012-07-25	5	23.9
2012-07-25	7	16.1
2012-07-25	72	11.8
2012-07-25	79	11.4
2012-07-25	8	7.2

Water Potential - mode: raw

Time	Species	Tree	readings (bar)
2012-07-25 04:27:00	OAK	UNKNOWN	-26	-33	-28	-9	-7	-8.5
2012-07-25 04:27:00	PINE	UNKNOWN	-13.5	-7.5	-8.5	-3.5	-4.5	-2.5
2012-07-25 08:42:00	PINE	UNKNOWN	-20		-3.5	-3.5
2012-07-25 08:42:00	OAK	UNKNOWN				-23.5	-30	-32
2012-07-25 10:48:00	PINE	UNKNOWN	-19.5	-3.5	-7	-4	-1.5	-1.5	-4.5	-5
2012-07-25 10:48:00	OAK	UNKNOWN				-33	-31.5	-31.5
2012-07-25 12:24:00	PINE	UNKNOWN	-11		-4	-6
2012-07-25 12:24:00	OAK	UNKNOWN				-38.5	-37.5	-35