Field Notes

<--2022-03-24 11:10:00 | 2022-04-27 16:20:00-->
Other sites visited today: Tonzi

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 The white popcorn flowers have been replaced by yellow dandelions.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] => Floor_South [2] => Soil_Transect_4 [3] => Soil_Transect_3 [4] => Soil_Transect_2 [5] => SoilCO2_West_A [6] => SoilCO2_West_B [7] => SoilCO2_West_C [8] => Soil_Transect_1 )

Date	DOY	Rep	Depth	Tower	Floor_South	Soil_Transect_4	Soil_Transect_3	Soil_Transect_2	SoilCO2_West_A	SoilCO2_West_B	SoilCO2_West_C	Soil_Transect_1	Avg	Spacial Count	Measurement Count
2022-04-12	102	0	0-15cm	13.2	8.1	14.1	13.8	10.9	19.1	13.5	8.3
2022-04-12	102	0	15-30cm	17		4.8	16.4	18.2	12.7	6.3	14.2
2022-04-12	102	0	30-45cm	20.7	20.9	12	15.9	23.5	20.1	21.5	14.8	19
2022-04-12	102	0	45-60cm	28.8	25.4	15.3	19.3	38.8	25.1	15.6	18.5	19.6
2022-04-12	102	1	0-15cm	13.8	10.6	14.4	13.2	10.6	19.4	13.2	7.4	5
2022-04-12	102	1	15-30cm	16.7	12.4	7.5	16.4	17.5	13.3	6.3	14.2	9
2022-04-12	102	1	30-45cm	19.8	21.5	13.4	16.5	23.5	20.4	20.9	14.3	19.3
2022-04-12	102	1	45-60cm	28.8	25.2	15.6	19.9	39.1	24.8	14.8	17.9	19.6
2022-04-12	102	2	0-15cm									5
2022-04-12	102	2	15-30cm									9.3
2022-04-12	102	2	30-45cm									19.3
2022-04-12	102	2	45-60cm									19.3
2022-04-12	102	Avg	0-15cm	13.5	9.35	14.25	13.5	10.75	19.25	13.35	7.85	5	11.87	9	18
2022-04-12	102	Avg	15-30cm	16.85	12.4	6.15	16.4	17.85	13	6.3	14.2	9.15	12.48	9	17
2022-04-12	102	Avg	30-45cm	20.25	21.2	12.7	16.2	23.5	20.25	21.2	14.55	19.2	18.78	9	19
2022-04-12	102	Avg	45-60cm	28.8	25.3	15.45	19.6	38.95	24.95	15.2	18.2	19.5	22.88	9	19