Field Notes

<--2013-04-24 09:30:00 | 2013-05-08 10:30:00-->
Other sites visited today: Tonzi | Vaira
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Tonzi: 2013-04-24 09:30:00 (DOY 114)
Author: Siyan Ma
Others: Joe

Summary: Swapped both co2 profile tanks, tram ok, RH/T profile ok, swapped 7500 at Vaira, standard field work, grass turning yellow

When: Date: 4/24/2013 , Day: 114 , Watch Time: 9:30 am .
Where: Tonzi/Vaira Ranch
Who: Siyan, Joe
Weather: clear, sunny
Phenology: grass starts to turn into yellow, 10% at Tonzi; 50% at Vaira

Summary

Checked and downloaded data from PC at Tower, Floor.
Joe downloaded data and check everything at Vaira and swapped memory cards of CR1000s at three sites.
Joe brought new full tanks of N2 and CO2 for the CO2 profile system.
Joe installed three more Ta and Rh sensor along with the CO2 profile system during this last visiting. The sensors were working reasonably.
Calibrated CO2 profile system; Zero and span seemed not stable.
Collected grass and litter samples for grass LAI.
Read dendrometers
Measured soil moisture
Measure groundwater well:

Date	DOY	Location	Depth without the black thing (feet)
4/24/2013	114	Floor	26.6
		Tower	31.2
		Roadside	39.5

Vaira_Grass Site

Fence and gate power: 12 v.
Joe downloaded data and check everything at Vaira and swapped memory cards of CR1000s at three sites.
Closed gate and set up fence. YES!
Collected soil samples for soil gas diffusion experiments.
Collected grass and litter samples for grass LAI.

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 – 5 v.)

Tower Gill sonic plots screen before downloading data

Screen shot of tower flux data logger table

downloading data from PC.
Swapped the memory cards of CR1000.
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!
Check calibration cylinders;

CO₂ 400 psig; flow 20 psi; 421.63 ppm.
N₂ 600 psig; flow 20 psi.
Is the pump running‌ YES!
Screen shot of Li-800 calibration pre-cal

Zero

Span

Tram

close gate and set up fence. YES!

Toniz_Floor Site

Fence and gate power: 12 v.
Reading from Gillsonic screen before downloading data. (The value of H₂O and CO₂ should be in the range of 0 – 5 v.)

Floor Gill sonic plots screen before downloading data

Screen shot of floor flux data logger table

downloading data from PC. YES!
Swapped the memory cards of CR1000.
Check MD-9 system connections Cannot be connected at the moment, probably because of hot weather conditions.

Screen shot of data logger communications failure

Close gate and set up fence. YES!

Tonzi
Dendrometer

Date	Day	Tag #	Reading (mm)
4/24/2013	114	1	25
		2	18.6
		3	21.4
		4	4
		5	24.3
		7	18.6
		8	9.6
		72	15.4
		79	16.5
		1	25
		2	18.6

tonzi	7931AFE	402165	574B4B	402FF3	574632	7A432E	7A3C6E	7A3B40	7A4AAA
4/24/2013	114
	sm
0-15	13.8	1.5	39.9	13.0	32.0	9.1	30.3	9.9	8.0
15-30	17.2	15.2	19.6	21.2	22.4	11.5	17.0	21.4	7.2
30-45	27.0	21.9	29.5	33.8	30.4	14.8	19.7	25.1	21.2
45-60	24.9	28.5	54.3	56.5	37.3	17.9	27.7	40.4	17.4

	A6D882B	A3D04E8	A6D72F5

0-15	10.9	8.9	5.2
15-30	15.2	0.4	18.5
30-45	24.0	22.3	26.6
45-60	36.2	37.0	23.4

vaira	7933dee	00000128B97F3	00000128B8072	00000128BDDE8
0-15	3.3	4.85	2.9	0.45
15-30	10.8	6.75	5.4	4.8
30-45	13.9	3.8	10.2	11.7
45-60	25.4	13.55	8.2	13.85