Field Notes

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Tonzi: 2021-09-01 12:00:00 (DOY 244)
Author: Joe Verfaillie
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Summary: Swapped 7500s, swapped FD chamber in open location, add power pack back to road well, z-cam cards in wrong cameras but okay, midday water potential

Tonzi
2021-09-01

I arrived at about 12:00 PDT. It was clear sunny and warm with a nice cool breeze from the west. I could see the smoke plume from the Caldor fire near Tahoe on the horizon but I think the breeze kept the smoke away. There is still a little bit of water in the pond. The trees are looking brown again but about the right time of year for that.

I swapped 7500s for calibration. At the tower sn 0035 came off and sn 75H-2514 went on. At the Floor sn 0418 came off and sn 75H-2669 went on. I uploaded the new config files, updated the pressure coefficients and reset the 7550 boxes.
Tower 0035 read: 399.1ppm CO2, 458.8mmol/m3 H2O, 98.4kPa, 23.3C, 97.2SS
Tower 2514 read: 409.0ppm CO2, 417.2mmol/m3 H2O, 98.3kPa, 22.9C, 102.0SS
Floor 0418 read: 406.6ppm CO2, 482.2mmol/m3 H2O, 98.5kPa, 26.3C, 97.2SS
Floor 2669 read: 409.4ppm CO2, 444.9mmol/m3 H2O, 98.5kPa, 26.3C, 101.1SS

I collected flux, met and camera data. I measured the wells, soil moisture and DBH gauges. I did midday water potential. Itâ€™s getting hard to find twigs with all green leaves. Pressures are more negative and one tree maxed out the tank I have â€“ probably last measurement for the year.

I swapped the open FD chamber sn FD20180026 came off and sn FD20190027 went on. The existing chamber failed two performance checks with different concentration from the two samples.

I put a lithium power pack back on the road well. All seemed well.

I serviced the z-cams. The memory cards for cam 1 and cam 2 were swapped but seemed to work fine. I was careful to put them away correctly. The window on z-cam one has come loose. I put it back in place and it should be okay since itâ€™s not likely to rain soon but needs to be re-glued.

I left at about 15:30 PDT.

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2021-09-01	VR_well	60
2021-09-01	VR_pond	12.88
2021-09-01	TZ_floor	32
2021-09-01	TZ_road	39.7
2021-09-01	TZ_tower	36.7

mode = both
Moisture Point Probes TZ
Array ( [0] => Tower_1 [1] => Soil_Transect_4_1 [2] => Soil_Transect_3_1 [3] => Soil_Transect_2_1 [4] => Soil_Transect_1_1 [5] => SoilCO2_West_A_1 [6] => SoilCO2_West_B_1 [7] => SoilCO2_West_C_1 [8] => Tower_2 [9] => Soil_Transect_4_2 [10] => Soil_Transect_3_2 [11] => Soil_Transect_2_2 [12] => Soil_Transect_1_2 [13] => SoilCO2_West_A_2 [14] => SoilCO2_West_B_2 [15] => SoilCO2_West_C_2 [16] => Tower_3 [17] => Soil_Transect_4_3 [18] => Soil_Transect_3_3 [19] => Soil_Transect_2_3 [20] => Soil_Transect_1_3 [21] => SoilCO2_West_A_3 [22] => SoilCO2_West_B_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_B_4 [31] => SoilCO2_West_C_4 )

0000

Date	DOY	Rep	Depth	Tower_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	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	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	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
2021-09-01	244	0	nan	2.1	4.6	0.1	2.4	1.2	7.1	3	3.3	10.6	4.2	12.7	11.5	3.2	5.7	1.4	11.2	13.4	9.5	12.3	15.4	12.6	14.8	14	10.9	18.8	10.2	19.9	25.9	13	15.9	7.9	11.6
2021-09-01	244	1	nan	2.7	6.6	0.1	2.1	1.8	6.5	3.6	2.7	11.2	6.3	12.1	10.6	3.2	5.7	1.7	11.2	14	9.2	10.6	15.9	12.9	14.5	13.7	10.3	18.2	10.5	20.2	26.5	12.8	15.6	9.9	11.3
2021-09-01	244	Avg	0-15cm																																	0
2021-09-01	244	Avg	15-30cm																																	0
2021-09-01	244	Avg	30-45cm																																	0
2021-09-01	244	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
2021-09-01	244	0	nan	0.1	1	6	3.2	3.4	12.3	11.9	15.3
2021-09-01	244	1	nan	0.1	0.4	5.4	3.2	2.8	10.9	11.3	15.3
2021-09-01	244	Avg	0-15cm									0
2021-09-01	244	Avg	15-30cm									0
2021-09-01	244	Avg	30-45cm									0
2021-09-01	244	Avg	45-60cm									0

No TZ grass heigth found

No VR grass heigth found

Tree DBH

Date	Tag#	Reading (mm)
2021-09-01	1	12.7
2021-09-01	102	7.4
2021-09-01	2	11.3
2021-09-01	245	3.2
2021-09-01	3	17.1
2021-09-01	4	11.9
2021-09-01	5	7.5
2021-09-01	6	19.4
2021-09-01	7	6.2
2021-09-01	72	10.3
2021-09-01	79	11.5