Field Notes

<--2021-02-10 09:30:00 | 2021-03-17 11:00:00-->
Other sites visited today: Vaira | Hill Slough

Tonzi: 2021-03-02 11:30:00 (DOY 61)
Author: Joe Verfaillie
Others:

Summary: Nice day, swapped 7500s, fixed minor issues with zcams, remove calibration kit from Tower top

Tonzi
2021-03-02

I arrived at about 11:30. It was mild with patchy high thin clouds and a cool breeze â€“ warm in the sun cool in the shade. The road is mostly dry except the usual puddles near the tower. The pond may have even gone down a tiny bit. The grass is somewhat yellow probably due to cold weather as the soil is mostly damp â€“ saturated at the bottom almost dry at the very surface.

I swapped the 7500s for calibration. At the Tower sn 75H-2180 came down and sn 75H-2150 went up. At the Floor sn 0035 came down and sn 75H-2176 went up. Pressure coefficients were update and the 7550 boxes reset.

2180 read: 420.1ppm CO2, 244.0mmol/m3 H2O, 16.4C, 98.8kPa
2150 read: 420.4ppm CO2, 219.3mmol/m3 H2O, 15.9C, 98.8kPa

0035 read: 428.2ppm CO2, 269.8mmol/m3 H2O, 18.3C, 98.8kPa
2176 read: 434.8ppm CO2, 257.7mmol/m3 H2O, 19.9C, 98.8kPa

I removed the calibration kit from the top of the tower. The following equipment came off

HMP155 sn S3410851
METER ATMOS14
PAR sn 060831 (Ameriflux)
CR1000 sn 4190
Sonic sn 153805

I collected data from the other data loggers (IRT CR1000 still needed reset to send data) and the FD chambers. I did the Moisture Point, DBH and manual well measurements.

I serviced the z-cams. Cam 3 had lost its time just before my last visit. This time I replaced its clock battery with a new CR1225 lithium coin cell. Last time I put the lid on z-cam1 backwards so the window did not line up with the lens. All the photos from z-cam 1 this time are trash. However the trees have been leafless for the entire period so little real data was lost.

I left at 14:30

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2021-03-02	VR_well	57.1
2021-03-02	TZ_floor	31
2021-03-02	TZ_road	38.65
2021-03-02	TZ_tower	36.9

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

Date	DOY	Rep	Depth	Tower	Floor_South	Soil_Transect_4	Soil_Transect_3	Soil_Transect_2	Soil_Transect_1	SoilCO2_West_A	SoilCO2_West_C	SoilCO2_West_B	Avg	Spacial Count	Measurement Count
2021-03-02	61	0	0-15cm	33.8	23.5	16.2	17.1	18.8	15.9	27.6	23.2
2021-03-02	61	0	15-30cm	31.9	25.8	26.5	29.5	30.7	18.2	24.3	29.5	17.3
2021-03-02	61	0	30-45cm	31	38.8	26.8	31.3	33.5	33.2	34.3	37.7	22.3
2021-03-02	61	0	45-60cm	42	52	33.1	43.1	46.8	34	43.4	48.8	58.6
2021-03-02	61	1	0-15cm	34.1	23.5	16.8		18.5	15.6	26.1	23.2	24.4
2021-03-02	61	1	15-30cm	31.3	25.5	24.6	29.8	30.4	18.8	24	30.4	17.6
2021-03-02	61	1	30-45cm	31.5	39.6	27.9	31	34.3	32.9	32.7	36.6	23.5
2021-03-02	61	1	45-60cm	42	52.6	31.9		47.7	34	43.7	48	60
2021-03-02	61	2	0-15cm				22.3
2021-03-02	61	2	15-30cm				29.2
2021-03-02	61	2	30-45cm				31.3
2021-03-02	61	2	45-60cm				40.8
2021-03-02	61	Avg	0-15cm	33.95	23.5	16.5	19.7	18.65	15.75	26.85	23.2	24.4	22.5	9	17
2021-03-02	61	Avg	15-30cm	31.6	25.65	25.55	29.5	30.55	18.5	24.15	29.95	17.45	25.88	9	19
2021-03-02	61	Avg	30-45cm	31.25	39.2	27.35	31.2	33.9	33.05	33.5	37.15	22.9	32.17	9	19
2021-03-02	61	Avg	45-60cm	42	52.3	32.5	41.95	47.25	34	43.55	48.4	59.3	44.58	9	18

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

Date	DOY	Rep	Depth	Biomass_Cage	Flux_Tower	Avg	Spacial Count	Measurement Count
2021-03-02	61	0	0-15cm	8
2021-03-02	61	0	15-30cm	16.7	28.3
2021-03-02	61	0	30-45cm	27.4	15.4
2021-03-02	61	0	45-60cm	29.4	26.2
2021-03-02	61	1	0-15cm	7.4	10.3
2021-03-02	61	1	15-30cm	17.3	28.6
2021-03-02	61	1	30-45cm	26.8	14.8
2021-03-02	61	1	45-60cm	29.1	26.5
2021-03-02	61	Avg	0-15cm	7.7	10.3	9	2	3
2021-03-02	61	Avg	15-30cm	17	28.45	22.73	2	4
2021-03-02	61	Avg	30-45cm	27.1	15.1	21.1	2	4
2021-03-02	61	Avg	45-60cm	29.25	26.35	27.8	2	4

No TZ grass heigth found

No VR grass heigth found

Tree DBH

Date	Tag#	Reading (mm)
2021-03-02	1	11.5
2021-03-02	102	7.1
2021-03-02	2	11.3
2021-03-02	245	13.2
2021-03-02	3	17.3
2021-03-02	4	11.2
2021-03-02	5	4.3
2021-03-02	6	16.9
2021-03-02	7	19.5
2021-03-02	72	11.2
2021-03-02	79	10.5