Field Notes

<--2007-04-05 10:30:00 | 2007-04-12 00:00:00-->

Sherman Island: 2007-04-10 14:00:00 (DOY 100)
Author: Dennis Baldocchi
Others:

Summary: Check & download data at Sherman Island. Take TDR soil moisture readings. Take Spectrometer reflectance reading. Sample additional water table ports. Sample LAI & plant height.

When: Date: april 10, 2007 , Day: 100 , Watch Time: 1400 .

Where: Sherman Island Methane Study

Who: ddb

Weather, clear, nice breeze, mild temperature

Phenology: weeds about 2.5 feet tall

Tasks

check and download data at Sherman Island
Take TDR soil moisture readings
take spectrometer reflectance reading
Sample additional water Table ports
Sample LAI and plant height

Tube inlet at 2.5 m

Need to reste inlet and place closer to sonic.

Put heat flux plate #1 back into the soil.

Sherman Island Pasture Site

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

Time
Path/File name	D:\Data\SI07_ .flx D:\Data\SI07 .raw
	mean	Std		mean	std
w			Ts
u			H₂O	1.7
v			CO₂	2.2
			CH4	1.84

Methane Sensor
1. Cell Pressure (near 159 Torr?): 162_____
2. Cell Temperature: ___29.3__
3. Double Check

i. Sample rate: 10Hz?:____

ii. Methane ppm Hi flow: 1.874 ppm

iii. Methane ppm, low flow (remember to put back in high flow:

iv. Pump status??:___fine_

v. Filter Status:______fine

vi. Check Water in tube:

Water table is measured manually relative to the top of the extruding tube:

3 ft and 4 tenths

Last time I checked the tube was 19 inches

Converted to cm

Water table is 55.37 cm

(feet + inches/10)*12*2.54 â€“ 19*2.54 = depth cm

Used this to compare with Druck from day 97 data logger output:

Which was about -53 cm, ranging between -53 and 56 cm

Druck output psi = mv times range(psi)* supply voltage/sensitivity

Range = 5 psi

Supply voltage on cr10x is 5 vols

Sensitivity is 0.98 mv/V/psi

1 psi = 0.68948 m H20

Sensor is 75 cm below ground level

Depth (cm) = mv * 12.755 * 6.8948 - 75

downloading data
If Swapping Li-7500 Analyzer. (Remove SN# ; install SN# )
Check the fans of air temp. and relative humidity sensors
Check MD-9 system connections
Check CR10X with two multiplexers and sensor values
Check levels of Radiation sensors, clear up surfaces.

T and Rh sensor not working

Pressure sensor not working

Closed gate and set up fence.

Soil moisture - TDR probes			Date:	jDay	Name:
Battery (v) - the first reading after turn on				measurements started from
Site	SN#	Depth	Reading1	Reading2	Reading3
Sherman Island
#1 East in fence	0FEDDAA1	0-15	17.6	16.2		1
		15-30	37.1	37.1		1
		30-45	38.8	40.2		1
		45-60	73.5	83.8		1
#2 West in fence	AB5408F	0-15	13.5	12.1		2
		15-30	30.1	30.1		2
		30-45	34.1	34.3		2
		45-60	97.3	99.3		2
#3	FED8688	0-15	22.3	22.1		3
		15-30	28.6	28.3		3
		30-45	44.4	43.8		3
		45-60	91	92.1		3
#4 Middle T	0FED7C67	0-15				4
Pins bent		15-30				4
		30-45				4
		45-60				4
#5 South T	0A6D8356	0-15	18.8	18.8
		15-30	23.4	24.3
		30-45	37.4	41.3
		45-60	79.5	67.8
#6 North T	0FEDDO1B	0-15	19.7	19.7
		15-30	21.6	21.9
		30-45	39.6	39.4
		45-60	54	52.9