Field Notes

<--2013-09-04 10:50:00 | 2013-09-25 11:30:00-->
Other sites visited today: Vaira | Tonzi

Tonzi: 2013-09-25 10:30:00 (DOY 268)
Author: Siyan Ma
Others: Joe, Dennis, Shiping, Eva

Summary: Standard fieldwork, offset in CO2 profile system, LED sensor at Tonzi broken - removed, little rain last weekend, but stiff very dry.

When: Date: 9/25/2013 , Day: 268 , Watch Time: 10:30 am .
Where: Tonzi/Vaira Ranch
Who: Siyan, Joe, Dennis, Eva, Shiping
Weather: clear with some clouds, sunny, nice breeze, perfect temperature (~20^oC)
Phenology: a-week-ago rain wasnâ€™t enough to grass germination; oak trees turned to yellow and more dropped; soil surface pretty dry

Summary

Checked and downloaded data from PC at Tower, Floor.
Joe downloaded Data at Vaira
Swapped memory cards of CR1000s at three sites. Everything worked well.
Calibrated CO2 profile system; 17ppm between data logger and Li-820 software
The cover of LED sensor at Tonzi was broken. Joe took the whole sensor back to the lab for fixing.
Read dendrometers
Measured soil moisture
Measure groundwater well:

Date	DOY	Location	Depth without the black thing (feet)
9/25/2013	268	Floor	31
		Tower	35.5
		Roadside	39
			!!!Decreased 4 feet in past 3 weeks

Vaira_Grass Site

Fence and gate power: 12 v.
Panel and Batteries: - v; - amps; - amps.
Joe downloaded data and Swapped the memory cards of CR1000.
Check the fans of air temp and relative humidity sensors at Vaira. YES!

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

Tonzi_Tower Site

Fence and gate power: 12 v.
Panel and Batteries: - v; - amps; - amps.
Reading from Gillsonic screen before downloading data. (The value of H₂O and CO₂ should be in the range of 0 â€“ 5 v.)

downloading data from PC.
Swapped the memory cards of CR1000 (by Joe).
check the fans of air temp. and relative humidity sensors on the tower and the floor (by Dennis).
Check rain gage, make sure not clogged. YES!
Check calibration cylinders;

CO₂ 1000 psig; flow 20 psi; 404.02 ppm.
N₂ 1500 psig; flow 20 psi.
Is the pump runningâ€Œ YES!

Before zero

After Zero:

Before Span:

After Span at 404.02 ppm

close gate and set up fence. YES!

Toniz_Floor Site

Fence and gate power: 12 v.
Panel and Batteries: - v; - amps; - amps.
Reading from Gillsonic screen before downloading data. (The value of H₂O and CO₂ should be in the range of 0 â€“ 5 v.)

downloading data from PC. YES!
Swapped the memory cards of CR1000 (by Joe).
Check MD-9 system connections YES!

CR23X3 â€“ floor-Met
CR23X6 â€“ tower-Met
CR10X2 â€“ floor-Met
Soil CO₂ profile: CR23X5 â€“ soil CO₂ profile

Close gate and set up fence. YES!

Tonzi
Dendrometer

Date	Day	Tag #	Reading (mm)
9/25/2013	268	2	17.1
		3	20.2
		4	3.9
		5	24.6
		7	16.9
		8	8.8
		72	15.1
		79	17.5
		102	21
		245	13

!!!Decreased 4 feet in past 3 weeks
Groundwater at Tonzi
water table graph

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2013-09-25	TZ_floor	31
2013-09-25	TZ_road	39
2013-09-25	TZ_tower	35.5

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)
2013-09-25	102	21
2013-09-25	2	17.1
2013-09-25	245	13
2013-09-25	3	20.2
2013-09-25	4	3.9
2013-09-25	5	24.6
2013-09-25	7	16.9
2013-09-25	72	15.1
2013-09-25	79	17.5
2013-09-25	8	8.8