Field Notes

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Other sites visited today: Tonzi
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Vaira: 2022-04-12 16:00:00 (DOY 102)
Author: Joe Verfaillie
Others:

Summary: Another short power outage, Standard data collection, grass turning yellow

Vaira
2022-04-12

I arrived at about 16:00PDT. Rain the day before had left a few puddles in the road but the ground surface was still mostly dry. The morning had been clear, cool and sunny with a nice breeze. This afternoon some isolated clouds began to percolate in from the west. The grass is definitely turning yellow in spots. The white popcorn flowers have been replaced by yellow dandelions.

I measured the well and collected the flux, met, phenocam, and FD data. We have had a few small power drops here and another one since last visit. I check that the connections at the solar controller are good. The drop outs affect everything and multiple lines run from the solar controller box so the problem has to be there or with the batteries. Next time I can load test the batteries.

The 7500 read: 426.3ppm CO2, 173.0mmol/m3 H2O, 100.1kPa, 19.1C, 103.5SS

The soil co2 system didn’t seem to be giving readings – maybe the power outage had messed it up. I reloaded its program after collecting the data. I’m not sure it improved things as the CO2 probes are only read every 10min. Like the Tonzi soil co2, this system is probably not needed any more.

I measured the grass height. It’s really patchy with some grasses having gotten much taller and gone to seed.

Just as I set up to do spectral measurements a cloud started to pass in front of the sun. I thought I would wait for the cloud to pass but it was moving really slowly and I thought the light was stable enough so I did the spectral measurements in the cloud shadow.

I left at about 16:40

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2022-04-12	TZ_floor	25.15
2022-04-12	TZ_road	33.5
2022-04-12	TZ_tower	28.8
2022-04-12	VR_well	53.95

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] => 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] => SoilCO2_West_A_2 [13] => SoilCO2_West_B_2 [14] => SoilCO2_West_C_2 [15] => Tower_3 [16] => Floor_South_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] => Floor_South_4 [26] => Soil_Transect_4_4 [27] => Soil_Transect_3_4 [28] => Soil_Transect_2_4 [29] => Soil_Transect_1_4 [30] => SoilCO2_West_A_4 [31] => SoilCO2_West_B_4 [32] => SoilCO2_West_C_4 [33] => Soil_Transect_1_1 [34] => Floor_South_2 [35] => Soil_Transect_1_2 )

0000

Date	DOY	Rep	Depth	Tower_1	Floor_South_1	Soil_Transect_4_1	Soil_Transect_3_1	Soil_Transect_2_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	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	Soil_Transect_1_1	Floor_South_2	Soil_Transect_1_2	Spacial Count
2022-04-12	102	0	nan	13.2	8.1	14.1	13.8	10.9	19.1	13.5	8.3	17	4.8	16.4	18.2	12.7	6.3	14.2	20.7	20.9	12	15.9	23.5	19	20.1	21.5	14.8	28.8	25.4	15.3	19.3	38.8	19.6	25.1	15.6	18.5
2022-04-12	102	1	nan	13.8	10.6	14.4	13.2	10.6	19.4	13.2	7.4	16.7	7.5	16.4	17.5	13.3	6.3	14.2	19.8	21.5	13.4	16.5	23.5	19.3	20.4	20.9	14.3	28.8	25.2	15.6	19.9	39.1	19.6	24.8	14.8	17.9	5	12.4	9
2022-04-12	102	2	nan																					19.3									19.3				5		9.3
2022-04-12	102	Avg	0-15cm																																					0
2022-04-12	102	Avg	15-30cm																																					0
2022-04-12	102	Avg	30-45cm																																					0
2022-04-12	102	Avg	45-60cm																																					0