Field Notes

<--2017-10-25 09:00:00 | 2017-11-07 09:00:00-->
Other sites visited today: Vaira | Tonzi

Tonzi: 2017-10-25 11:00:00 (DOY 298)
Author: Joe Verfaillie
Others: Siyan

Summary: Added FD chamber, calibrated Vaisala CO2 probes, worked on the tower CO2 profile system.

Tonzi
2017-10-25

Siyan and I arrived at about 11:00am. It was warm and sunny with little to no wind. There was some rain in the wee hours of the morning of the 20th. The ground is still dry but the dead grass may be a little less brittle with the moisture. The trees still have leaves, but there are dead leaves on the ground under the trees.

I installed FD chamber sn 20160002 near the Open co2 soil profile. The chamber started up just fine this time â€“ must have been too warm to start last time. I collected data from both chambers but did not clear their memories.

I finally got the Vaisala CO2 calibration to run. Previous attempts were partially foiled by a program bug where the scan time and â€œif timeâ€ for output were the same. The trick was to remove the â€œif timeâ€ statement and to just set the output flag high each scan. I ran the cal system at the Open profile, then the Tree 1 profile and then the Tree 2 profile for about 20min in each location. I need to double check the order in which the probes are connected to the data logger.

I also worked on the CO2 profile system on the tower. I got the system powered with two DC-DC converters to step down the 24V from the batteries to 12V for the pump, data logger and solenoids. The LI-820 can run directly on the 24V. The pump was okay, the analyzer looked good and the data logger was okay once I reset its clock. But all but one solenoid were stuck. I brought in the solenoid set to see if I can get it unstuck. I left the 10x running but disconnected the LI-820. There is a null modem in the box at the base of the tower but it would be nice to have one at the LI-820 so that we can plug in with a laptop.

Siyan did all the standard fieldwork and data collection.

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2017-10-25	TZ_floor	27
2017-10-25	TZ_road	36.2
2017-10-25	TZ_tower	31.8

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

Date	DOY	Rep	Depth	Tower	Floor_South	Floor_East	Floor_West	Soil_Transect_4	Soil_Transect_3	Soil_Transect_2	Soil_Transect_1	SoilCO2_West_A	SoilCO2_West_B	SoilCO2_West_C	Avg	Spacial Count	Measurement Count
2017-10-25	298	0	0-15cm	4.5	5.7	6.2	10	6.6	3	3.6	0.9	1.2	5.3	3.3
2017-10-25	298	0	15-30cm	12.4	10.3	11.2	5.4	6.1	3.9	11.8	4.2	8.7	1.5	11.5
2017-10-25	298	0	30-45cm	14.5	7.3	13.4		9.2	11.5	15.9	13.4	15.9	15.1	13.1
2017-10-25	298	0	45-60cm	15.3	2.7	13.3		10.7	18.5	25.4	11.3	14.2	13	22.5
2017-10-25	298	1	0-15cm	3.9	3.4	6.8	11.9	7.2	3	3.6	0.9	1.8	6.8	3.3
2017-10-25	298	1	15-30cm	12.1	10.6	12.4	2.9	8.4	12.1	11.8	4.2	6.6	1.5	11.2
2017-10-25	298	1	30-45cm	13.7	7.6	12.9	12.3	9.5	12.6	15.6	13.7	16.2	15.4	13.4
2017-10-25	298	1	45-60cm	15	2.2	13.8	17.9	11.3	19.3	25.6	10.7	14.8	11.6	22.8
2017-10-25	298	Avg	0-15cm	4.2	4.55	6.5	10.95	6.9	3	3.6	0.9	1.5	6.05	3.3	4.68	11	22
2017-10-25	298	Avg	15-30cm	12.25	10.45	11.8	4.15	7.25	8	11.8	4.2	7.65	1.5	11.35	8.22	11	22
2017-10-25	298	Avg	30-45cm	14.1	7.45	13.15	12.3	9.35	12.05	15.75	13.55	16.05	15.25	13.25	12.93	11	21
2017-10-25	298	Avg	45-60cm	15.15	2.45	13.55	17.9	11	18.9	25.5	11	14.5	12.3	22.65	14.99	11	21

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
2017-10-25	298	0	0-15cm	3.6	2.1	5.3	1.5
2017-10-25	298	0	15-30cm	7.8	6.6	5.1	4.5
2017-10-25	298	0	30-45cm	15.1	3.7	7.8	13.7
2017-10-25	298	0	45-60cm	27.4	14.8	11.3	17.6
2017-10-25	298	1	0-15cm	5	2.1	5.3	1.2
2017-10-25	298	1	15-30cm	7.8	6.3	5.1	4.5
2017-10-25	298	1	30-45cm	15.4	3.9	7.8	14
2017-10-25	298	1	45-60cm	27.4	15	11	17
2017-10-25	298	Avg	0-15cm	4.3	2.1	5.3	1.35	3.26	4	8
2017-10-25	298	Avg	15-30cm	7.8	6.45	5.1	4.5	5.96	4	8
2017-10-25	298	Avg	30-45cm	15.25	3.8	7.8	13.85	10.18	4	8
2017-10-25	298	Avg	45-60cm	27.4	14.9	11.15	17.3	17.69	4	8

No TZ grass heigth found

No VR grass heigth found

Tree DBH

Date	Tag#	Reading (mm)
2017-10-25	1	10.5
2017-10-25	102	6.4
2017-10-25	2	20.5
2017-10-25	245	5.4
2017-10-25	3	7.4
2017-10-25	4	6.9
2017-10-25	5	2.8
2017-10-25	7	18.7
2017-10-25	72	6.9
2017-10-25	79	8.5
2017-10-25	8	21.9