Field Notes

<--2014-06-11 05:00:00 | 2014-06-25 04:40:00-->
Other sites visited today: Tonzi | Vaira

Tonzi: 2014-06-25 04:30:00 (DOY 176)
Author: Joe Verfaillie
Others: Siyan

Summary: Predawn water potential, fixed CO2 profile calibration solenoids and dirty cell, fixed Tram bad wheel, mapped trees, checked tower sonic settings

Tonzi
2014-06-25

I arrived at about 4:30am with Siyan. The trees still look good, but the grass is completely dead. The ground is hard and dry. I met Mr. Tonziâ€™s grandson about 5:15am. His comment was itâ€™s like a desert out there. Siyan said the well levels dropped by 3 to 6 feet from two weeks ago.

Siyan did predawn water potential.

I worked on the CO2 profile system. The solenoids that control the cal gases were chattering when I got there and the N2 tank was empty. I finally decided that there was a ground problem the let the relay control signal from the data logger to float around the activation voltage of the relays. The CR10X is on an isolating power supply half way up the tower. So the data logger ground may not be the same as the towerâ€™s power system ground. I ran a jumper from the data logger ground to the tower power ground and this seemed to improve the situation. The whole power distribution system on the tower could be overhauled.

The LI820 was dirty again. I cleaned its path and it ran much better but was not calibrated well. With the N2 tank being empty I did not have a zero, but then I remembered a tank of 2% ch4 in air that was used for water potential had little to no CO2. That tank uses a 590 fitting instead on the 580 on the N2 tank. So I had to swap the regulator of the CO2 span tank, but it worked. Zero was off by about 130ppm and span was off -137ppm. Last cal was 2014-05-22. On the manual tab the coefficients were 0.9547, 1.9421 and 6.7374e-10 after calibration.

We went to Vaira about 8:30am

The tram was not running again. I was derailed. The cotter pin in its south wheel had falled out. I replaced it with some wire and I reset it but it derailed again. Just before leaving I reset it and watched it run. It seemed the drive wheels were a little narrow for the track. I was able to add a washer to the south wheel and I think it will fix the problem.

I walked around the tower area and matched the trees to Martinâ€™s Lidar map. They matched very well.

The software for the Global Water pressure sensor was not reinstalled correctly on the netbook when it was rebuilt. Seems its missing a USB to serial driver.

I checked the sonic settings on the tower, but could not talk to the floor sonic.
Tower sonic settings:
B3 â€“ 9600 baud
E1 â€“ Full duplex
F1 â€“ 8 bits, no parity
G1 â€“ measurement average off
J2 â€“ Two differential channels
J5 â€“ No SE channels
L1 -
M7 â€“ UVW continuous binary
NA â€“ id A
O1 â€“ ASCII format comma separated
P6 â€“ 10 samples per second
U1 â€“ m/s
Z1 - unknown
X1 â€“ Align U to Axis

This seems to indicate that the U axis is aligned with the transducer head and not the north spar. This could introduce a 30 degree offset to wind directions.

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2014-06-25	TZ_floor	30.6
2014-06-25	TZ_road	39
2014-06-25	TZ_tower	41.4

mode = both
Moisture Point Probes TZ
Array ( [0] => Tower [1] => Floor_South [2] => Floor_East [3] => Floor_West [4] => SoilCO2 [5] => Soil_Transect_4 [6] => Soil_Transect_3 [7] => Soil_Transect_1 [8] => SoilCO2_West_A [9] => SoilCO2_West_B [10] => Soil_Transect_2 [11] => SoilCO2_West_C )

Date	DOY	Rep	Depth	Tower	Floor_South	Floor_East	Floor_West	SoilCO2	Soil_Transect_4	Soil_Transect_3	Soil_Transect_1	SoilCO2_West_A	SoilCO2_West_B	Soil_Transect_2	SoilCO2_West_C	Avg	Spacial Count	Measurement Count
2014-06-25	176	0	0-15cm	10.9	1.3	11.2	6.8	3.4	0.1	2	3.6	5.6	2.1
2014-06-25	176	0	15-30cm	9.7	13.6	10.9	10	8.4	17	21	5.4	7.5	0.5	13.3	18.5
2014-06-25	176	0	30-45cm	18.7	12.3	13.4	15.4	18.4	11.1	22.1	12.3	15.9	16.5	-16.2
2014-06-25	176	0	45-60cm		6.4	21.1	12.2	11.1	21.3	13.6	11	20.8	14.8	23.4	15.3
2014-06-25	176	1	0-15cm	9.1	1.2			2.4	1.2	2.5	1.8				21
2014-06-25	176	1	15-30cm	9	13.6		10	8.7	10	21.9	4.8			13.3	17.6
2014-06-25	176	1	30-45cm	18.4	11.7		15.1	18.7	10.3	23.2	12.9			15.4	30.8
2014-06-25	176	1	45-60cm		7.9		15.6	11.1	11.3	14.8	10.7			22.8	15.6
2014-06-25	176	Avg	0-15cm	10	1.25	11.2	6.8	2.9	0.65	2.25	2.7	5.6	2.1		21	6.04	11	17
2014-06-25	176	Avg	15-30cm	9.35	13.6	10.9	10	8.55	13.5	21.45	5.1	7.5	0.5	13.3	18.05	10.98	12	21
2014-06-25	176	Avg	30-45cm	18.55	12	13.4	15.25	18.55	10.7	22.65	12.6	15.9	16.5	-0.4	30.8	15.54	12	20
2014-06-25	176	Avg	45-60cm		7.15	21.1	13.9	11.1	16.3	14.2	10.85	20.8	14.8	23.1	15.45	15.34	11	19

mode = both
Moisture Point Probes VR
Array ( [0] => Solar_Panels [1] => Flux_Tower [2] => Gate [3] => Biomass_Cage )

Date	DOY	Rep	Depth	Solar_Panels	Flux_Tower	Gate	Biomass_Cage	Avg	Spacial Count	Measurement Count
2014-06-25	176	0	0-15cm	0.1	1.8	0.9	0.7
2014-06-25	176	0	15-30cm	10	6.6	5.4	3.2
2014-06-25	176	0	30-45cm	14.3	2	8.4	10.6
2014-06-25	176	0	45-60cm	26.5	11.6	8.2	13.6
2014-06-25	176	1	0-15cm	0.3	2.4	0.9	0.4
2014-06-25	176	1	15-30cm	9	6.3	5.7	3.2
2014-06-25	176	1	30-45cm	13.1	1.4	8.4	10.3
2014-06-25	176	1	45-60cm	27.6	10.7	8.7	13
2014-06-25	176	Avg	0-15cm	0.2	2.1	0.9	0.55	0.94	4	8
2014-06-25	176	Avg	15-30cm	9.5	6.45	5.55	3.2	6.18	4	8
2014-06-25	176	Avg	30-45cm	13.7	1.7	8.4	10.45	8.56	4	8
2014-06-25	176	Avg	45-60cm	27.05	11.15	8.45	13.3	14.99	4	8

No TZ grass heigth found

No VR grass heigth found

Tree DBH

Date	Tag#	Reading (mm)
2014-06-25	1	99
2014-06-25	1	7.4
2014-06-25	102	22.8
2014-06-25	102	4.4
2014-06-25	2	20.9
2014-06-25	2	10.3
2014-06-25	245	18.0
2014-06-25	3	23.3
2014-06-25	3	6.8
2014-06-25	4	99
2014-06-25	4	10.1
2014-06-25	5	26.1
2014-06-25	5	8.3
2014-06-25	7	21.8
2014-06-25	7	8.4
2014-06-25	72	18.2
2014-06-25	79	23.0
2014-06-25	79	10.9
2014-06-25	8	12.3

Water Potential - mode: raw

Time< h>	Species	Tree	readings (bar)
2014-06-25 04:40:00	OAK	102	-10	-15	-14
2014-06-25 04:40:00	OAK	35	-15	-21	-19
2014-06-25 04:40:00	OAK	92	-7	-8	-8.5
2014-06-25 05:01:00	PINE	OLD	-10	-15	-18
2014-06-25 05:01:00	PINE	YNG	-8	-7	-3