Field Notes

<--2017-12-14 09:30:00 | 2018-01-03 10:00:00-->
Other sites visited today: Vaira | Tonzi

Tonzi: 2017-12-14 11:00:00 (DOY 348)
Author: Joe Verfaillie
Others: Siyan

Summary: Calibration of soil co2 sensors with zero air, pulled broken Moisture Point, shutdown Tower CO2 profile and brought in LI-820 for cleaning and cal.

Tonzi
2017-12-14

I arrived with Siyan at about 11am. It was clear sunny and mild without a breath of wind. The ground is still damp in the low places but no puddles. The trees no longer have leaves at all.

I worked on recalibrating the soil co2 profiles, this time using zero air to go all the way to zero. The small tank of zero air I had nearly ran out and I refilled it partially from the N2 tank for the tower CO2 profile. After downloading the 23x data I uploaded a new program that starts recoding 10sec samples when flag 8 is set high. All three profiles seemed to calibrate okay.

I collected the data from both FD chambers then cleared their data. The pump on the FD chamber sn 20160002 in the Open (East) location seems to be running but both CO2 concentrations are the same. Maybe there is a solenoid or something that is not switching between cells properly. I removed the chamber since itâ€™s not working. Both chambers here also had some sprouting grass inside their collars but not as much as Vaira.

I pulled out the Moisture Point probe sn 000000574632 near the soil co2 profiles that has not been working for a while. Its bottom most pin is broken, but I donâ€™t think that pin is used.

I checked on the Tower co2 profile. The LI-820 sn CGA-556 was giving mostly bad readings. I shut off the gas, the pump and the solenoids and brought back the LI-820 for cleaning and calibration in the lab.

Siyan did all the data collection and regular fieldwork.

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2017-12-14	TZ_floor	28.6
2017-12-14	TZ_road	37.4
2017-12-14	TZ_tower	33.6

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
2017-12-14	348	0	0-15cm	19.4	188	30.5	25.8	17.9	22.3	18.5	10.3	25.6	26.1	12.7
2017-12-14	348	0	15-30cm	28	30.4	31.9	20.6	22.2	30.1	30.1	12.1	24	17.6	28.6
2017-12-14	348	0	30-45cm	27.4	37.4	38.5	31	22.3	29	30.7	25.4	35.2	32.1	36
2017-12-14	348	0	45-60cm	35.7	35.1	42	41.4	26.2	41.1	38	16.5	39.1	45.7	45.4
2017-12-14	348	1	0-15cm	18.5	18.5	31.4		17.6	23.5	18.5	10.3	26.7	26.1	12.4
2017-12-14	348	1	15-30cm	27.7	31	31.6	21.6	21.9	30.1	29.2	11.8	24	17.6	26.3
2017-12-14	348	1	30-45cm	26.2	37.4	38	32.1	21.8	29.6	30.1	25.1	32.7	31.8	36.6
2017-12-14	348	1	45-60cm	35.7	36.8	40.3	41.7	25.9	40.8	38.5	16.8	39.1	46	45.1
2017-12-14	348	Avg	0-15cm	18.95	103.25	30.95	25.8	17.75	22.9	18.5	10.3	26.15	26.1	12.55	28.47	11	21
2017-12-14	348	Avg	15-30cm	27.85	30.7	31.75	21.1	22.05	30.1	29.65	11.95	24	17.6	27.45	24.93	11	22
2017-12-14	348	Avg	30-45cm	26.8	37.4	38.25	31.55	22.05	29.3	30.4	25.25	33.95	31.95	36.3	31.2	11	22
2017-12-14	348	Avg	45-60cm	35.7	35.95	41.15	41.55	26.05	40.95	38.25	16.65	39.1	45.85	45.25	36.95	11	22

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
2017-12-14	348	0	0-15cm	16.5	15.3	20.3	12.1
2017-12-14	348	0	15-30cm	25.8	27.4	19.1	19.7
2017-12-14	348	0	30-45cm	29.3	15.4	21.8	29.9
2017-12-14	348	0	45-60cm	41.4	27.4	20.5	29.9
2017-12-14	348	1	0-15cm	12.1	15	20.3	13
2017-12-14	348	1	15-30cm	25.5	28.6	19.4	19.1
2017-12-14	348	1	30-45cm	29.3	15.1	22.6	29
2017-12-14	348	1	45-60cm	40.5	27.1	20.8	30.2
2017-12-14	348	Avg	0-15cm	14.3	15.15	20.3	12.55	15.58	4	8
2017-12-14	348	Avg	15-30cm	25.65	28	19.25	19.4	23.08	4	8
2017-12-14	348	Avg	30-45cm	29.3	15.25	22.2	29.45	24.05	4	8
2017-12-14	348	Avg	45-60cm	40.95	27.25	20.65	30.05	29.73	4	8

No TZ grass heigth found

No VR grass heigth found

Tree DBH

Date	Tag#	Reading (mm)
2017-12-14	1	13.5
2017-12-14	102	9.1
2017-12-14	2	21.3
2017-12-14	245	8.0
2017-12-14	3	13.1
2017-12-14	4	7.5
2017-12-14	5	5.8
2017-12-14	7	19.8
2017-12-14	72	10.9
2017-12-14	79	10.1
2017-12-14	8	23.0