Field Notes

<--2022-02-23 10:45:00 | 2022-03-24 11:10:00-->
Other sites visited today: Tonzi | West Pond

Vaira: 2022-03-10 11:30:00 (DOY 69)
Author: Joe Verfaillie
Others: Dennis

Summary: Trees putting on leaves, popcorn flowers, swapped 7500, removed cal kit

Vaira
2022-03-10

Dennis and I arrived at about 11:30 PST. It was clear, sunny and mild with a gusty wind. The trees have begun to put on leaves in earnest. The grass looks a little thicker but not any taller. I also noticed a brown patch – no rain since early January, low RH today ~16%. The ground surface is dry but the water hole was still mostly full. The white popcorn flowers are beginning to appear in large patches.

Dennis measured the well, did spectral measurements and veg height.

I collected the met, flux, image and FD data. I swapped the IRGA for calibration: sn 75H-2182 came off and sn 75H-2667 went on. I updated the pressure coefficients and restarted the box.

2182 read: 419.2ppm CO2, 160.8mmol/m3 H2O, 99.9kpa, 18.4C, 99.5SS
2667 read: 409.8ppm CO2, 239.6mmol/m3 H2O, 99.9kPa, 18.3C, 102.0SS

I collected the data from the cal kit CR1000 and then removed the cal kit system from the radiometer boom. The following equipment was moved to Tonzi Tower.
CR1000 sn 23865
CNR4 sn 120788
PAR sn 212225
NDVI in sn 1049
NDVI out sn 1050
HMP155 sn T2930114

We left at about 12:15 for Tonzi

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2022-03-10	VR_well	52.9
2022-03-10	TZ_floor	26.8
2022-03-10	TZ_road	33.8
2022-03-10	TZ_tower	29.2

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 )

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	Avg	Spacial Count	Measurement Count
2022-03-10	69	0	0-15cm	20.9	9.7	10.3	14.4	12.7	12.1	18.5	10.6
2022-03-10	69	0	15-30cm	26.8	16.4	12.4	23.1	25.8	11.2	11.1	19.1
2022-03-10	69	0	30-45cm	27.4	28.2	16.8	23.2	28.8	27.1	39.6	24.6
2022-03-10	69	0	45-60cm	39.7		21.6	32.8	44	26.5	52.6	37.1
2022-03-10	69	1	0-15cm	20.3	10.6	10.6	14.4	12.4	12.1		10
2022-03-10	69	1	15-30cm	25.8	15.2	13	22.8	25.2	11.5		18.8
2022-03-10	69	1	30-45cm	26.2	27.9	16.2	23.7	29	27.9		25.7
2022-03-10	69	1	45-60cm	38.5		21.3	32.2	43.7	26.8		37.4
2022-03-10	69	2	0-15cm	20	10.9	10.6	14.7	12.4	12.1		11.2
2022-03-10	69	2	15-30cm	26.1	13.9	12.7	22.8	24.6	11.5		19.1
2022-03-10	69	2	30-45cm	26.8	28.5	17.9	24.3	29	27.1		26
2022-03-10	69	2	45-60cm	39.1		21.3	32.2	43.1	26.8		38.3
2022-03-10	69	Avg	0-15cm	20.4	10.4	10.5	14.5	12.5	12.1	18.5	10.6	13.69	8	22
2022-03-10	69	Avg	15-30cm	26.23	15.17	12.7	22.9	25.2	11.4	11.1	19	17.96	8	22
2022-03-10	69	Avg	30-45cm	26.8	28.2	16.97	23.73	28.93	27.37	39.6	25.43	27.13	8	22
2022-03-10	69	Avg	45-60cm	39.1		21.4	32.4	43.6	26.7	52.6	37.6	36.2	7	19