Field Notes

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Other sites visited today: West Pond | Bouldin Corn | Tonzi
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Vaira: 2021-04-01 11:45:00 (DOY 91)
Author: Joe Verfaillie
Others:

Summary: Dry and warm. Trees half way through putting on leaves.

Vaira
2021-04-01

I arrived at about 11:45 PDT. It was clear sunny and warm with a breeze from the west southwest that would come and go. All trees have some leaves but they are about in the middle of putting on leaves. The grass is beginning to grow too now about 7cm high in the grazed areas. Lots of white â€œpopcornâ€ flowers inside the fence and on hill sides towards the pond â€“ I did not go to the pond. The road was dry, not even damp in the usually wet places.

I measured the well and the moisture point probes. I collected the flux, met, camera and FD chamber data.
The 7500 read: 413.5ppm CO2, 390.3mmol/m3 H2O, 28.6C, 99.6kPa, 102.7SS

The piece of Mylar shading the north FD chamber had come off I put it back on with electrical tape. The shade does seem to reduce the chamberâ€™s temperature by 5-10C so I think it is worth making better quality versions.

I checked the radiometers and cleaned the LW in. I did spectral measurements.

I left at about 12:45 PDT

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2021-04-01	VR_well	56.2
2021-04-01	TZ_road	38.4
2021-04-01	TZ_tower	34.35
2021-04-01	TZ_floor	30.4

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_B_1 [8] => SoilCO2_West_C_1 [9] => Tower_2 [10] => Floor_South_2 [11] => Soil_Transect_4_2 [12] => Soil_Transect_3_2 [13] => Soil_Transect_2_2 [14] => Soil_Transect_1_2 [15] => SoilCO2_West_A_2 [16] => SoilCO2_West_B_2 [17] => SoilCO2_West_C_2 [18] => Tower_3 [19] => Floor_South_3 [20] => Soil_Transect_4_3 [21] => Soil_Transect_3_3 [22] => Soil_Transect_2_3 [23] => Soil_Transect_1_3 [24] => SoilCO2_West_A_3 [25] => SoilCO2_West_B_3 [26] => SoilCO2_West_C_3 [27] => Tower_4 [28] => Floor_South_4 [29] => Soil_Transect_4_4 [30] => Soil_Transect_3_4 [31] => Soil_Transect_2_4 [32] => Soil_Transect_1_4 [33] => SoilCO2_West_A_4 [34] => SoilCO2_West_B_4 [35] => 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_B_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_B_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_B_3	SoilCO2_West_C_3	Tower_4	Floor_South_4	Soil_Transect_4_4	Soil_Transect_3_4	Soil_Transect_2_4	Soil_Transect_1_4	SoilCO2_West_A_4	SoilCO2_West_B_4	SoilCO2_West_C_4	Spacial Count
2021-04-01	91	0	nan	30.5	13.2	38.9	17.3	17.9	13.2	16.2	19.4	15.9	31.3	31	22.8	27.4	29.2	15.2	33.2	14.8	27.7	31.8	41.6	26.2	29	33.8	32.1	41	22.3	36.3	43.1	50.3	30.8	40.3	48.6	33.4	26.2	58.3	49.4
2021-04-01	91	1	nan	30.8	13.8	39.9	17.6	17.3	13.5	15	19.1	16.5	31.3	31.3	23.7	27.1	29.2	16.1	33.8	14.8	27.4	32.7	41.3	25.7	28.5	33.5	31.5	41	31.5	36.8	42	52.3	30.5	41.7	51.7	33.7	26.8	51.4	50.3
2021-04-01	91	Avg	0-15cm																																					0
2021-04-01	91	Avg	15-30cm																																					0
2021-04-01	91	Avg	30-45cm																																					0
2021-04-01	91	Avg	45-60cm																																					0

mode = both
Moisture Point Probes VR
Array ( [0] => Flux_Tower_1 [1] => Biomass_Cage_1 [2] => Flux_Tower_2 [3] => Biomass_Cage_2 [4] => Flux_Tower_3 [5] => Biomass_Cage_3 [6] => Flux_Tower_4 [7] => Biomass_Cage_4 )

0000

Date	DOY	Rep	Depth	Flux_Tower_1	Biomass_Cage_1	Flux_Tower_2	Biomass_Cage_2	Flux_Tower_3	Biomass_Cage_3	Flux_Tower_4	Biomass_Cage_4	Spacial Count
2021-04-01	91	0	nan	8	5.9	24	14.4	12.6	23.5	23.6	25.9
2021-04-01	91	1	nan	7.7	6.2	24	14.2	14	24	24.2	25.6
2021-04-01	91	Avg	0-15cm									0
2021-04-01	91	Avg	15-30cm									0
2021-04-01	91	Avg	30-45cm									0
2021-04-01	91	Avg	45-60cm									0