Field Notes

<--2021-03-17 09:20:00 | 2021-04-18 13:30:00-->
Other sites visited today: West Pond | Bouldin Corn | Tonzi

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] => 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_B [8] => 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_B	SoilCO2_West_C	Avg	Spacial Count	Measurement Count
2021-04-01	91	0	0-15cm	30.5	13.2	38.9	17.3	17.9	13.2	16.2	19.4	15.9
2021-04-01	91	0	15-30cm	31.3	31	22.8	27.4	29.2	15.2	33.2	14.8	27.7
2021-04-01	91	0	30-45cm	31.8	41.6	26.2	29	33.8	32.1	41	22.3	36.3
2021-04-01	91	0	45-60cm	43.1	50.3	30.8	40.3	48.6	33.4	26.2	58.3	49.4
2021-04-01	91	1	0-15cm	30.8	13.8	39.9	17.6	17.3	13.5	15	19.1	16.5
2021-04-01	91	1	15-30cm	31.3	31.3	23.7	27.1	29.2	16.1	33.8	14.8	27.4
2021-04-01	91	1	30-45cm	32.7	41.3	25.7	28.5	33.5	31.5	41	31.5	36.8
2021-04-01	91	1	45-60cm	42	52.3	30.5	41.7	51.7	33.7	26.8	51.4	50.3
2021-04-01	91	Avg	0-15cm	30.65	13.5	39.4	17.45	17.6	13.35	15.6	19.25	16.2	20.33	9	18
2021-04-01	91	Avg	15-30cm	31.3	31.15	23.25	27.25	29.2	15.65	33.5	14.8	27.55	25.96	9	18
2021-04-01	91	Avg	30-45cm	32.25	41.45	25.95	28.75	33.65	31.8	41	26.9	36.55	33.14	9	18
2021-04-01	91	Avg	45-60cm	42.55	51.3	30.65	41	50.15	33.55	26.5	54.85	49.85	42.27	9	18

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
2021-04-01	91	0	0-15cm	8	5.9
2021-04-01	91	0	15-30cm	24	14.4
2021-04-01	91	0	30-45cm	12.6	23.5
2021-04-01	91	0	45-60cm	23.6	25.9
2021-04-01	91	1	0-15cm	7.7	6.2
2021-04-01	91	1	15-30cm	24	14.2
2021-04-01	91	1	30-45cm	14	24
2021-04-01	91	1	45-60cm	24.2	25.6
2021-04-01	91	Avg	0-15cm	7.85	6.05	6.95	2	4
2021-04-01	91	Avg	15-30cm	24	14.3	19.15	2	4
2021-04-01	91	Avg	30-45cm	13.3	23.75	18.53	2	4
2021-04-01	91	Avg	45-60cm	23.9	25.75	24.83	2	4