Field Notes

<--2009-03-27 10:00:00 | 2009-04-17 05:10:00-->
Other sites visited today: Twitchell Rice

Tonzi: 2009-04-03 05:30:00 (DOY 93)
Author: Siyan Ma
Others:

When: Date: 4/3/2009 , Day: 93 , Watch Time: 5:30am .
Where: Tonzi/Vaira Ranch
Who: Siyan
Weather: clear, nice warm
Phenology: oak leaf out, vaira grass white flowers, Tonzi grass yellow flowers
Summary

measure predawn and midday leaf water potential (-6.89 bar and -13.38 bar, respectively).
Flux systems were working well at Tower, Floor, and Vaira, and data were downloaded.
Vaira 10Hz thermocouple looked fine in the early morning but very spiky in the late morning.
Calibrated Li-800 in the field (bring the copy of Ted’s instruction).
read dendrometers
took soil moisture measurements
spectrometer (Youngryle)
filed pictures
groundwater wells:

Date	DOY	Location	Depth from the black thing (feet)
4/3/2009	93	Floor	26.71
		Tower	30.55
		roadside	34.91

Soil CO₂ profile

Reading from datalogger

Panel temp		21
Battery voltage		13
CO2E_1	719	TCE_1	22	CO2W_1	1507	TCW_1	19
CO2E_2	1138	TCE_2	27	CO2W_2	2085	TCW_2	20
CO2E_3	1917	TCE_3	19	CO2W_3	3885	TCW_3	21
CO2E_4	1719	TCE_4	15	CO2W_4	2752	TCW_4	16

Reading from panels of analyzers

depth	Open	order	depth	Tree	order
2cm (1%)	1460	1	2cm (1%)	3030	1
4cm	2280	2	4cm	4160	4
8cm	3860	3	8cm	1770	2
16cm	6970	4	16cm	1.12%	3

Tonzi
Dendrometer

Date	Day	Tag #	Reading (mm)
4/3/2009	93	71	X
		72	x
		77	X
		78	X
		79	‌
		245	6.2
		248	X
		250	14.7
		255	X
		‌252‌	X
		102	7.9

Notes: “X” means not working any more.

tonzi	7931AFE	402165	574B4B	402FF3	574632	7A432E	7A3C6E	7A3B40	7A4AAA
4/3/2009	93
	SM
0-15	28.5	5.9	17.9	15.3	16.8	21.2	18.2	16.5	12.4
15-30	35.0	27.7	33.2	30.7	23.4	18.5	22.8	25.5	16.4
30-45	38.0	37.7	39.4	36.3	42.4	22.1	21.5	28.2	30.4
45-60	41.4	54.9	64.3	46.0	40.3	26.8	37.7	45.7	24.8

	A6D882B	A3D04E8	A6D72F5

0-15	22.8	19.1	10.6
15-30	17.0	19.7	24.0
30-45	28.2	28.8	32.7
45-60	35.7	46.6	50.0

vaira	57318a	7933dee
0-15	10.1	2.3
15-30	14.7	17.9
30-45	18.0	21.5
45-60	25.1	30.1