Field Notes

<--2020-11-11 13:15:00 | 2020-12-18 12:15:00-->
Other sites visited today: Tonzi | Mayberry

Vaira: 2020-12-01 09:15:00 (DOY 336)
Author: Joe Verfaillie
Others:

Summary: Swapped 7500, removed most of the soil CO2 system, Stardot reset its clock to April, standard field work

Vaira
2020-12-01

I arrived at 9:15. It was cool clear and sunny with a light breeze from the southwest. There are cows (moms and calves) around. We got some rain almost two weeks ago but not much â€“ enough to clean the solar panels. The ground is no longer crispy instead damp with dew. There is some grass struggling to sprout up through the litter but not enough to see unless you look carefully. I met Dale Vaira and his wife on their way in to do some road repairs towards the east end of their land. Dale asked about wild pigs â€“ seems the neighbors are still having trouble with them. A few trees still have some green leaves â€“ down in the flat just uphill from Rancho Seco many of the trees still have green leaves.

The plan was to swap 7500s today but I discovered that I had forgotten to copy the new config files from the other laptop. Luckily I had other work to do removing most of the soil CO2 system and while I was doing that Daphne came to the rescue emailing me the files. I was able to use my phone as a hot spot and tether the Fluxalot laptop to my phone to download the config files. So I was able to swap the 7500s after all. But later I accidently deleted the screen shots so I donâ€™t have before and after measurements. CO2 was around 450ppm and H2O was around 320mmol/m3 both before and after the swap. I changed the pressure coefficients and restarted the 7550. Sn 75H-2176 came off and sn 0418 went on.

I removed the soil co2 box with CR10X sn 20139, AM16/32 mux sn 5609, and 9 Vaisala GMP interface boxes. I ran a new power wire in conduit from the main solar controller box to the new 23x box and removed the old solar controller sn 03220377. I also removed the probes and cables for the North and East profiles:

North
2cm sn Y2030049
4cm sn K1350101
8cm sn L2010070
16cm sn G0230062

East
2cm sn K1310103
4cm sn L2010067
8cm sn Y2009109
16cm sn K1350102

I left the plastic casing pipe and spooled up the thermocouple wires for the embedded thermocouples just in case. At the east profile I removed the four extra thermocouples inside the plastic pipes with the CO2 probes. I mounted the other box with the CR23x sn ???? on the post with cable ties because it had narrower holes that didnâ€™t fit the U-bolt from the original box. The west profile of Eos GP sensors is running and collected by the cr23x. I was thinking about swapping the current standard power relay with a solid state switch. The relay is active for 8min each half hour so there might be some power savings. I need to check the relay power consumption and the Eos GP sensor power needs.

I did the two Moisture Point readings, the well depth, cleaned the radiation sensors and did a handful of spectra measurements.

The Stardot reset its clock at the beginning of December â€“ the month got changed to April but otherwise okay I think.

I left at 11:50

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2020-12-01	VR_well	60.5
2020-12-01	TZ_road	39
2020-12-01	TZ_tower	36
2020-12-01	TZ_floor	31.45

mode = both
Moisture Point Probes TZ
Array ( [0] => Tower [1] => Floor_South [2] => Floor_West [3] => Soil_Transect_4 [4] => Soil_Transect_3 [5] => Soil_Transect_2 [6] => Soil_Transect_1 [7] => SoilCO2_West_A [8] => SoilCO2_West_B [9] => SoilCO2_West_C )

Date	DOY	Rep	Depth	Tower	Floor_South	Floor_West	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
2020-12-01	336	0	0-15cm	8.3	6.2	14.4	2.7	9.7	9.4	1.8	16.8	12.7	6.5
2020-12-01	336	0	15-30cm	10.6	5.7	3.9	7.2	13.9	10.9	3.5	6.9	1.4	10.9
2020-12-01	336	0	30-45cm	13.1	12	39.6	9	9.2	14.8	12.6	13.7	7.6	10.3
2020-12-01	336	0	45-60cm	15.3	2.2	41.4	10.2	12.8	21.6	11.6	12.5	11.1	12.2
2020-12-01	336	1	0-15cm	7.7	5.3	13.8	2.7	9.1	8.8	1.8	15.9	13.2	5.9
2020-12-01	336	1	15-30cm	10.6	5.6	5.4	8.1	13.9	10.9	3.5	8.4	1.7	10.9
2020-12-01	336	1	30-45cm	13.4	11.5	11.1	7.6	9.2	15.1	12.6	14.3	7.8	9.8
2020-12-01	336	1	45-60cm	15.6	1.9	41.4	9.9	12.2	20.8	11	11	11.1	12.5
2020-12-01	336	Avg	0-15cm	8	5.75	14.1	2.7	9.4	9.1	1.8	16.35	12.95	6.2	8.64	10	20
2020-12-01	336	Avg	15-30cm	10.6	5.65	4.65	7.65	13.9	10.9	3.5	7.65	1.55	10.9	7.7	10	20
2020-12-01	336	Avg	30-45cm	13.25	11.75	25.35	8.3	9.2	14.95	12.6	14	7.7	10.05	12.72	10	20
2020-12-01	336	Avg	45-60cm	15.45	2.05	41.4	10.05	12.5	21.2	11.3	11.75	11.1	12.35	14.92	10	20

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
2020-12-01	336	0	0-15cm	6.2	4.5
2020-12-01	336	0	15-30cm	10.6	8.1
2020-12-01	336	0	30-45cm	3.7	14
2020-12-01	336	0	45-60cm	13.3	14.5
2020-12-01	336	1	0-15cm	4.7	4.5
2020-12-01	336	1	15-30cm	11.5	8.7
2020-12-01	336	1	30-45cm	3.9	13.7
2020-12-01	336	1	45-60cm	13.6	14.8
2020-12-01	336	Avg	0-15cm	5.45	4.5	4.98	2	4
2020-12-01	336	Avg	15-30cm	11.05	8.4	9.73	2	4
2020-12-01	336	Avg	30-45cm	3.8	13.85	8.83	2	4
2020-12-01	336	Avg	45-60cm	13.45	14.65	14.05	2	4