Field Notes

<--2012-11-15 10:00:00 | 2012-12-11 10:30:00-->
Other sites visited today: Vaira | Tonzi

Tonzi: 2012-12-11 09:00:00 (DOY 346)
Author: Siyan Ma
Others: Joe

Summary: Standard field work, Tower CO2 profile down, serviced Vaisala probes, serviced z-cams

When: Date: 12/11/2012 , Day: 346 , Watch Time: 9:00 am .
Where: Tonzi/Vaira Ranch
Who: Siyan, Joe
Weather: clear in the morning; cloudy in the afternoon; foggy in Delta area on the way to Tonzi.
Phenology: green grasses, a lot of moisture, about 5 in rain recently; oak leaves fell.

Summary

checked and downloaded data at Tower, Floor, and Vaira. We lost 11 days data at Vaira because of broken fuss in the main power box.
Swapped memory cards of Zcam.
Gashound gas analyzer gave -9999 value; Joe tried cleaning it in the field, but it didn’t work stably. Joe took it back to the lab.
Checked soil CO2 probes, about half of them were wet outside the probes probably due to condensation. After clean and dry, reinstalled them in the profiles.
Collected above ground organic matters (including grasses, litters, and organic matters near surface 0.5 cm) for LAI and organic matter survey.
Read dendrometers
Measured soil moisture
Measure groundwater well:

Date	DOY	Location	Depth without the black thing (feet)
12/11/2012	346	Floor	30
		Tower	34.6
		roadside	38

Vaira_Grass Site

Fence and gate power: 12 v.
We lost 11 days data at Vaira because of broken fuss in the main power box.
Reading from Gillsonic screen before downloading data. (The value of H₂O and CO₂ should be in the range of 0 – 5 v.)

downloading data
Check the fans of air temp. and relative humidity sensors at Vaira. YES!
Check MD-9 system connections YES!
Check CR23X with two multiplexers

Check levels of Radiation sensors, clear up surfaces. YES.
Check rain gage, make sure not clogged. YES!
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 – 5 v.)

downloading data
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!
Is the pump running‌ Yes, but Gashound gas analyzer gave -9999 value; Joe tried cleaning it in the field, but it didn’t work stably. Joe took it back to the lab.

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 – 5 v.)

downloading data YES!
Check MD-9 system connections YES!

CR23X3 – floor-Met
CR23X6 – tower-Met
CR10X2 – floor-Met

Soil CO₂ profile: CR23X5 – soil CO₂ profile

Close gate and set up fence. YES!

tonzi	7931AFE	402165	574B4B	402FF3	574632	7A432E	7A3C6E	7A3B40	7A4AAA
12/11/2012	346
	sm
0-15	39.3	20.6	38.2	28.5	42.0	26.0	22.3	24.1	23.2
15-30	40.0	36.8	49.1	44.7	47.9	28.0	32.1	31.8	16.3
30-45	41.8	47.6	58.9	49.0	39.6	35.9	33.2	34.6	35.5
45-60	41.4	55.4	63.2	56.8	41.4	36.1	45.7	46.9	34.1

	A6D882B	A3D04E8	A6D72F5

0-15	26.6	23.2	16.8
15-30	27.4	20.2	39.9
30-45	35.0	36.9	59.2
45-60	45.3	50.6	50.8

vaira	57318a	7933dee	00000128B97F3	00000128B8072	00000128BDDE8
0-15	broken	28.6	25.3	15.6	6.5
15-30	broken	32.5	29.2	23.0	22.9
30-45	broken	31.9	11.933333	25.8	30.966667
45-60	broken	43.1	30.9	22.9	32.533333