Field Notes

<--2017-09-21 09:30:00 | 2017-10-05 09:30:00-->
Other sites visited today: Vaira | Twitchell Alfalfa

Vaira: 2017-09-21 10:30:00 (DOY 264)
Author: Joe Verfaillie
Others: Daphne, Siyan

Summary: Standard fieldwork, upgraded soil CO2 system adding Eosense probes, measured instrument heights.

Vaira
2017-09-21

Daphne, Siyan and I arrived at about 10:30. I was mostly clear and sunny with a light variable breeze. There were thunder clouds over the sierras.

I reinstalled two of the Vaisala CO2 profiles and added a profile of four new Eosense CO2 probes. For the Vaisala profiles I moved the three cables from the West profile to the North profile and moved two of the cables from the North profile to the East profile. I made new frames that are staked to the ground with rebar and hold four PVC tubes at -2, -4, -8, and -16 cm deep. I used a drill to dig the holes. The tubes are pressed tightly to the bottom of the holes but I had to back fill some along the sides of the holes. There are now four probes at each location instead of three. The third TC was chewed at both ends. I cut off the bad parts shortening it and re-soldered the end. We forgot to bring the extra Vaisala probes with us so I left the 4cm locations empty.

sn y2030049 - North 2cm - ch1 labeled I-1 (2cm)
no co2 probe - North 4cm - ch2 labeled I-2 (4cm)
sn l2010070 - North 8cm - ch3 labeled I-3 (8cm)
sn g0230062 - North 16cm - ch4 labeled II-1 (2cm)
sn k1310103 - East 2cm - ch5 labeled II-2 (4cm)
no co2 probe - East 4cm - ch6 labeled II-3 (8cm)
sn y2009109 - East 8cm - ch7 labeled III-1 (2cm)
sn k1350102 - East 16cm - ch8 labeled III-2 (4cm)

The thermocouples for the East profile need to be double checked. All the labels need to be updated and the program needs to be double checked.

The Eosense probes were added to the end of the multiplexor â€“ four CO2 (purple) followed by four temperatures (blue). The cables have the bulky connectors on the ends. They also have a 0-5V range which is over range for the CR10x â€“ might replace with a CR23x.

sn GP20160042 - West 2cm - ch1
sn GP20170028 - West 4cm - ch2
sn GP20160117 - West 8cm - ch3
sn GP20160012 - West 16cm - ch4

Daphne measured heights of sensors and Siyan did the standard fieldwork.

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2017-09-21	TZ_floor	24.8
2017-09-21	TZ_road	34.3
2017-09-21	TZ_tower	29.8

mode = both
Moisture Point Probes TZ
Array ( [0] => Tower [1] => Floor_South [2] => Floor_East [3] => Floor_West [4] => Soil_Transect_4 [5] => Soil_Transect_3 [6] => Soil_Transect_2 [7] => Soil_Transect_1 [8] => SoilCO2_West_A [9] => SoilCO2_West_B [10] => SoilCO2_West_C )

Date	DOY	Rep	Depth	Tower	Floor_South	Floor_East	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
2017-09-21	264	0	0-15cm	3	5.2	3.9	2.1	1.6	0.9	4.2	0.4	3.9	6.8	1.2
2017-09-21	264	0	15-30cm	13	11.2	11.1	3.5	8.1	13.6	11.8	4.5	6.6	10.6	11.5
2017-09-21	264	0	30-45cm	15.4	8.1	15.8	14	9.2	15.6	15.9	13.4	17.3	15.9	14.3
2017-09-21	264	0	45-60cm	15.3	3.6	16.9	17	11	18.8	27.9	11.6	17.6	13.6	35.4
2017-09-21	264	1	0-15cm	2.4	5.1	3.3	4.7	2.8	1.2	3.3	0.7	3.9	7.1	0.9
2017-09-21	264	1	15-30cm	13	10	10.9	1.1	7.8	13.6	12.1	4.5	6.9	1.1	11.5
2017-09-21	264	1	30-45cm	15.8	7.8	17	13.1	9.8	15.6	16.2	13.4	16.2	15.9	14.3
2017-09-21	264	1	45-60cm	15.3	3.6	16.9	17.9	12.5	18.5	28.5	11	16.8	13.3	24.8
2017-09-21	264	Avg	0-15cm	2.7	5.15	3.6	3.4	2.2	1.05	3.75	0.55	3.9	6.95	1.05	3.12	11	22
2017-09-21	264	Avg	15-30cm	13	10.6	11	2.3	7.95	13.6	11.95	4.5	6.75	5.85	11.5	9	11	22
2017-09-21	264	Avg	30-45cm	15.6	7.95	16.4	13.55	9.5	15.6	16.05	13.4	16.75	15.9	14.3	14.09	11	22
2017-09-21	264	Avg	45-60cm	15.3	3.6	16.9	17.45	11.75	18.65	28.2	11.3	17.2	13.45	30.1	16.72	11	22

mode = both
Moisture Point Probes VR
Array ( [0] => Solar_Panels [1] => Flux_Tower [2] => Gate [3] => Biomass_Cage )

Date	DOY	Rep	Depth	Solar_Panels	Flux_Tower	Gate	Biomass_Cage	Avg	Spacial Count	Measurement Count
2017-09-21	264	0	0-15cm	0.1	1.9	0.6	0.3
2017-09-21	264	0	15-30cm	10.6	6.3	5.1	4.5
2017-09-21	264	0	30-45cm	15.6	5.3	9	14.8
2017-09-21	264	0	45-60cm	26.2	15	11	18.2
2017-09-21	264	1	0-15cm	0.9	0.4	0.9	0.4
2017-09-21	264	1	15-30cm	10.6	5.7	5.7	3.5
2017-09-21	264	1	30-45cm	15.4	4.5	9.5	14.3
2017-09-21	264	1	45-60cm	29.1	15	11	18.2
2017-09-21	264	Avg	0-15cm	0.5	1.15	0.75	0.35	0.69	4	8
2017-09-21	264	Avg	15-30cm	10.6	6	5.4	4	6.5	4	8
2017-09-21	264	Avg	30-45cm	15.5	4.9	9.25	14.55	11.05	4	8
2017-09-21	264	Avg	45-60cm	27.65	15	11	18.2	17.96	4	8