Field Notes

Vaira: 2020-10-22 11:45:00 (DOY 296)
Author: Joe Verfaillie
Others: Siyan

Summary: Tested tipping bucket, soil co2 gradient system down due to dead batteries - FD chamber running, fixed bad reading from Vaisala pressure sensor, Phenocam clock 20min ahead - fixed.

Vaira
2020-10-22

I arrived at about 11:45. Siyan was already there just finishing up and heading to Tonzi. I came by way of Bouldin Island where there was a strong north breeze but here there is a strong west breeze. No rain yet and the trees are hanging on to a few green leaves.

I tested the tipping bucket getting 104 out of 100 tips â€“ good enough.

I collected the data and cleaned the radiometers. The soil CO2 system was acting oddly and missing data. I saw that the battery voltage was low and checked the solar system. The charge controllerâ€™s idiot lights were showing the batteries depleted at midday. I disconnected the batteries and isolated them. All four have voltages of around 6-8V â€“ dead. The forced diffusion chamber is still running on the main solar system â€“ I collected and clear the chamberâ€™s memory. We need to discuss whether it is worthwhile revamping the soil co2 gradient system.

The 7500 read: 431.2ppm CO2, 334.2mmol/m3 H2O, 99.1kPa, 30.3C, 103.6SS

The Vaisala pressure sensors has been reading low (~95kPa). I reset its connector and pulled on its wires. A yellow wire broke off at the multiplexor. I fixed the wire connection and the reading seemed better ~99kPa.

The clock on the phenocam was about 20min ahead. I changed it from 12:09PST to 11:49PST

Siyan had collected the pond data, soil moisture and well measurement.

I left at about 12:30.

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2020-10-22	VR_well	59.6
2020-10-22	TZ_floor	31
2020-10-22	TZ_tower	35.6
2020-10-22	TZ_road	38.6
2020-10-22	EE	1.08
2020-10-22	MB	1.41
2020-10-22	SW	-0.56

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

Date	DOY	Rep	Depth	Tower	Floor_South	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
2020-10-22	296	0	0-15cm	2.4	2.8	3.9	0.3	0.1	2.1	0.1	5.3	6.8	5.7
2020-10-22	296	0	15-30cm	10.3	10.3	6	5.7	12.1	11.2	4.2	5.7	1.2	10.6
2020-10-22	296	0	30-45cm	13.7	12.6		9.5	11.5	25.1	13.4	15.1	9.4	10.9
2020-10-22	296	0	45-60cm	16.6	4.2	16.8	10.7	17.9	24.5	13	13.9	11.1	17.9
2020-10-22	296	1	0-15cm	3	2.1	3.9	0.1	0.1	1.8	0.1	5.6	4.2	0.1
2020-10-22	296	1	15-30cm	2.7	10.3	4.8	5.7	12.1	10.9	3.9	6.3	1.2	10.6
2020-10-22	296	1	30-45cm	12.9	12.9	10.9	9.5	10.6	15.9	13.4	15.1	8.4	10.3
2020-10-22	296	1	45-60cm	17.6	3.9	18.2	10.2	18.2	23.9	13	14.5	11.1	18.5
2020-10-22	296	Avg	0-15cm	2.7	2.45	3.9	0.2	0.1	1.95	0.1	5.45	5.5	2.9	2.53	10	20
2020-10-22	296	Avg	15-30cm	6.5	10.3	5.4	5.7	12.1	11.05	4.05	6	1.2	10.6	7.29	10	20
2020-10-22	296	Avg	30-45cm	13.3	12.75	10.9	9.5	11.05	20.5	13.4	15.1	8.9	10.6	12.6	10	19
2020-10-22	296	Avg	45-60cm	17.1	4.05	17.5	10.45	18.05	24.2	13	14.2	11.1	18.2	14.79	10	20

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

Date	DOY	Rep	Depth	Flux_Tower	Biomass_Cage	Avg	Spacial Count	Measurement Count
2020-10-22	296	0	0-15cm	0.7	0.1
2020-10-22	296	0	15-30cm	6.9	3.2
2020-10-22	296	0	30-45cm	3.7	13.4
2020-10-22	296	0	45-60cm	13.9	16.8
2020-10-22	296	1	0-15cm	1.3	0.4
2020-10-22	296	1	15-30cm	6.3	3.9
2020-10-22	296	1	30-45cm	4.9	12.6
2020-10-22	296	1	45-60cm	13	16.5
2020-10-22	296	Avg	0-15cm	1	0.25	0.63	2	4
2020-10-22	296	Avg	15-30cm	6.6	3.55	5.08	2	4
2020-10-22	296	Avg	30-45cm	4.3	13	8.65	2	4
2020-10-22	296	Avg	45-60cm	13.45	16.65	15.05	2	4