Field Notes

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

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 [1] => Floor_South_1 [2] => Floor_East_1 [3] => Floor_West_1 [4] => SoilCO2_1 [5] => Soil_Transect_4_1 [6] => Soil_Transect_3_1 [7] => Soil_Transect_1_1 [8] => SoilCO2_West_A_1 [9] => SoilCO2_West_B_1 [10] => Tower_2 [11] => Floor_South_2 [12] => Floor_East_2 [13] => Floor_West_2 [14] => SoilCO2_2 [15] => Soil_Transect_4_2 [16] => Soil_Transect_3_2 [17] => Soil_Transect_2_2 [18] => Soil_Transect_1_2 [19] => SoilCO2_West_A_2 [20] => SoilCO2_West_B_2 [21] => SoilCO2_West_C_2 [22] => Tower_3 [23] => Floor_South_3 [24] => Floor_East_3 [25] => Floor_West_3 [26] => SoilCO2_3 [27] => Soil_Transect_4_3 [28] => Soil_Transect_3_3 [29] => Soil_Transect_2_3 [30] => Soil_Transect_1_3 [31] => SoilCO2_West_A_3 [32] => SoilCO2_West_B_3 [33] => Floor_South_4 [34] => Floor_East_4 [35] => Floor_West_4 [36] => SoilCO2_4 [37] => Soil_Transect_4_4 [38] => Soil_Transect_3_4 [39] => Soil_Transect_2_4 [40] => Soil_Transect_1_4 [41] => SoilCO2_West_A_4 [42] => SoilCO2_West_B_4 [43] => SoilCO2_West_C_4 [44] => SoilCO2_West_C_1 [45] => SoilCO2_West_C_3 )

0000

Date	DOY	Rep	Depth	Tower_1	Floor_South_1	Floor_East_1	Floor_West_1	SoilCO2_1	Soil_Transect_4_1	Soil_Transect_3_1	Soil_Transect_1_1	SoilCO2_West_A_1	SoilCO2_West_B_1	Tower_2	Floor_South_2	Floor_East_2	Floor_West_2	SoilCO2_2	Soil_Transect_4_2	Soil_Transect_3_2	Soil_Transect_2_2	Soil_Transect_1_2	SoilCO2_West_A_2	SoilCO2_West_B_2	SoilCO2_West_C_2	Tower_3	Floor_South_3	Floor_East_3	Floor_West_3	SoilCO2_3	Soil_Transect_4_3	Soil_Transect_3_3	Soil_Transect_2_3	Soil_Transect_1_3	SoilCO2_West_A_3	SoilCO2_West_B_3	Floor_South_4	Floor_East_4	Floor_West_4	SoilCO2_4	Soil_Transect_4_4	Soil_Transect_3_4	Soil_Transect_2_4	Soil_Transect_1_4	SoilCO2_West_A_4	SoilCO2_West_B_4	SoilCO2_West_C_4	SoilCO2_West_C_1	SoilCO2_West_C_3	Spacial Count
2014-06-25	176	0	nan	10.9	1.3	11.2	6.8	3.4	0.1	2	3.6	5.6	2.1	9.7	13.6	10.9	10	8.4	17	21	13.3	5.4	7.5	0.5	18.5	18.7	12.3	13.4	15.4	18.4	11.1	22.1	-16.2	12.3	15.9	16.5	6.4	21.1	12.2	11.1	21.3	13.6	23.4	11	20.8	14.8	15.3
2014-06-25	176	1	nan	9.1	1.2			2.4	1.2	2.5	1.8			9	13.6		10	8.7	10	21.9	13.3	4.8			17.6	18.4	11.7		15.1	18.7	10.3	23.2	15.4	12.9			7.9		15.6	11.1	11.3	14.8	22.8	10.7			15.6	21	30.8
2014-06-25	176	Avg	0-15cm																																															0
2014-06-25	176	Avg	15-30cm																																															0
2014-06-25	176	Avg	30-45cm																																															0
2014-06-25	176	Avg	45-60cm																																															0

mode = both
Moisture Point Probes VR
Array ( [0] => Solar_Panels_1 [1] => Flux_Tower_1 [2] => Gate_1 [3] => Biomass_Cage_1 [4] => Solar_Panels_2 [5] => Flux_Tower_2 [6] => Gate_2 [7] => Biomass_Cage_2 [8] => Solar_Panels_3 [9] => Flux_Tower_3 [10] => Gate_3 [11] => Biomass_Cage_3 [12] => Solar_Panels_4 [13] => Flux_Tower_4 [14] => Gate_4 [15] => Biomass_Cage_4 )

0000

Date	DOY	Rep	Depth	Solar_Panels_1	Flux_Tower_1	Gate_1	Biomass_Cage_1	Solar_Panels_2	Flux_Tower_2	Gate_2	Biomass_Cage_2	Solar_Panels_3	Flux_Tower_3	Gate_3	Biomass_Cage_3	Solar_Panels_4	Flux_Tower_4	Gate_4	Biomass_Cage_4	Spacial Count
2014-06-25	176	0	nan	0.1	1.8	0.9	0.7	10	6.6	5.4	3.2	14.3	2	8.4	10.6	26.5	11.6	8.2	13.6
2014-06-25	176	1	nan	0.3	2.4	0.9	0.4	9	6.3	5.7	3.2	13.1	1.4	8.4	10.3	27.6	10.7	8.7	13
2014-06-25	176	Avg	0-15cm																	0
2014-06-25	176	Avg	15-30cm																	0
2014-06-25	176	Avg	30-45cm																	0
2014-06-25	176	Avg	45-60cm																	0

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	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