Field Notes

<--2022-02-23 10:45:00 | 2022-03-24 11:10:00-->
Other sites visited today: Tonzi | West Pond
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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 [1] => Floor_South_1 [2] => Soil_Transect_4_1 [3] => Soil_Transect_3_1 [4] => Soil_Transect_2_1 [5] => Soil_Transect_1_1 [6] => SoilCO2_West_A_1 [7] => SoilCO2_West_C_1 [8] => Tower_2 [9] => Floor_South_2 [10] => Soil_Transect_4_2 [11] => Soil_Transect_3_2 [12] => Soil_Transect_2_2 [13] => Soil_Transect_1_2 [14] => SoilCO2_West_A_2 [15] => SoilCO2_West_C_2 [16] => Tower_3 [17] => Floor_South_3 [18] => Soil_Transect_4_3 [19] => Soil_Transect_3_3 [20] => Soil_Transect_2_3 [21] => Soil_Transect_1_3 [22] => SoilCO2_West_A_3 [23] => SoilCO2_West_C_3 [24] => Tower_4 [25] => Soil_Transect_4_4 [26] => Soil_Transect_3_4 [27] => Soil_Transect_2_4 [28] => Soil_Transect_1_4 [29] => SoilCO2_West_A_4 [30] => SoilCO2_West_C_4 )

0000

Date	DOY	Rep	Depth	Tower_1	Floor_South_1	Soil_Transect_4_1	Soil_Transect_3_1	Soil_Transect_2_1	Soil_Transect_1_1	SoilCO2_West_A_1	SoilCO2_West_C_1	Tower_2	Floor_South_2	Soil_Transect_4_2	Soil_Transect_3_2	Soil_Transect_2_2	Soil_Transect_1_2	SoilCO2_West_A_2	SoilCO2_West_C_2	Tower_3	Floor_South_3	Soil_Transect_4_3	Soil_Transect_3_3	Soil_Transect_2_3	Soil_Transect_1_3	SoilCO2_West_A_3	SoilCO2_West_C_3	Tower_4	Soil_Transect_4_4	Soil_Transect_3_4	Soil_Transect_2_4	Soil_Transect_1_4	SoilCO2_West_A_4	SoilCO2_West_C_4	Spacial Count
2022-03-10	69	0	nan	20.9	9.7	10.3	14.4	12.7	12.1	18.5	10.6	26.8	16.4	12.4	23.1	25.8	11.2	11.1	19.1	27.4	28.2	16.8	23.2	28.8	27.1	39.6	24.6	39.7	21.6	32.8	44	26.5	52.6	37.1
2022-03-10	69	1	nan	20.3	10.6	10.6	14.4	12.4	12.1		10	25.8	15.2	13	22.8	25.2	11.5		18.8	26.2	27.9	16.2	23.7	29	27.9		25.7	38.5	21.3	32.2	43.7	26.8		37.4
2022-03-10	69	2	nan	20	10.9	10.6	14.7	12.4	12.1		11.2	26.1	13.9	12.7	22.8	24.6	11.5		19.1	26.8	28.5	17.9	24.3	29	27.1		26	39.1	21.3	32.2	43.1	26.8		38.3
2022-03-10	69	Avg	0-15cm																																0
2022-03-10	69	Avg	15-30cm																																0
2022-03-10	69	Avg	30-45cm																																0
2022-03-10	69	Avg	45-60cm																																0