Field Notes

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Tonzi: 2020-06-12 12:00:00 (DOY 164)
Author: Joe Verfaillie
Others: Hisashi, Kyoko, Siyan

Summary: Grass is mostly dead, fire to the northeast, replaced z-cam clock batteries and reset clocks, tree circumference for DBH trees

Tonzi
2020-06-12

Hisashi, Kyoko, Siyan and I arrive at 12:00. It was a mild day with a strong gusty wind from the east southeast. We could see a fire burning to the northeast and three firefighting aircraft flew over. The fire was near Grant Line Road and Kiefer Boulevard and was 5000+ acres. The trees look good but the grass is near completely dead. The pond is about half full and no cows were seen. On the way home we got into a bit of rain near Davis.

I checked on the LattePanda computer and it seems fine with the external USB hub. I brought a powered USB hub just in case but adding more components to the system doesnâ€™t seem warranted at this time.

I collected the eddy data, the FD chamber data (did not clear it), and the data loggers not connected by radio. The CR1000 tree IRT had not sent data since last visit. I downloaded it directly. It probably needs an antenna extension to get the antenna away from the metal box.

The Tower 7500 read: 406.8ppm CO2, 470.4mmol/m3 H2O, 21.5C, 99.4kPa, 99.1SS
The Floor 7500 read: 410.3ppm CO2, 435.0mmol/m3 H2O, 24.5V, 99.2kPa, 99.1SS

Siyan did DBH, well measurements and midday water potential.

I serviced the z-cams. Cam 1â€™s clock battery had died last time. I replaced the old battery which still had a voltage of 3.08V with a new one and set its clock to PST. I replaced the batteries in the other two cameras just in case:
Cam 2: battery was 3.06V, its clock was set to PDT, I reset it to PST
Cam 3: battery was 3.07V, its clock was set to PDT, I reset it to PST

I also measured the circumference of the DBH trees in cm by putting a tape around them just above the DBH band. On a larger tree a difference of more than 1cm could occur depending on how I placed the band. Also on trees larger than 100cm I had to measure the circumference in two parts.
Tree, circumference (cm)
245, 54
102, 83
79, 107.5
72, 106
1, 107.8
7, 89.5
4, 80
5, 41.7
6, 53
2, 125.5
3, 111

We left at about 14:30

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2020-06-12	VR_well	55.3
2020-06-12	TZ_floor	27
2020-06-12	TZ_tower	31.6
2020-06-12	TZ_road	36
2020-06-12	VR_pond	17.56

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] => Soil_Transect_1_1 [6] => SoilCO2_West_A_1 [7] => SoilCO2_West_B_1 [8] => SoilCO2_West_C_1 [9] => Tower_2 [10] => Floor_South_2 [11] => Soil_Transect_4_2 [12] => Soil_Transect_3_2 [13] => Soil_Transect_2_2 [14] => Soil_Transect_1_2 [15] => SoilCO2_West_A_2 [16] => SoilCO2_West_B_2 [17] => SoilCO2_West_C_2 [18] => Tower_3 [19] => Floor_South_3 [20] => Soil_Transect_4_3 [21] => Soil_Transect_3_3 [22] => Soil_Transect_2_3 [23] => Soil_Transect_1_3 [24] => SoilCO2_West_A_3 [25] => SoilCO2_West_B_3 [26] => SoilCO2_West_C_3 [27] => Tower_4 [28] => Floor_South_4 [29] => Soil_Transect_4_4 [30] => Soil_Transect_3_4 [31] => Soil_Transect_2_4 [32] => SoilCO2_West_A_4 [33] => SoilCO2_West_B_4 [34] => SoilCO2_West_C_4 )

0000

Date	DOY	Rep	Depth	Tower_1	Floor_South_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	Floor_South_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	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	SoilCO2_West_A_4	SoilCO2_West_B_4	SoilCO2_West_C_4	Spacial Count
2020-06-12	164	0	nan	5.3	6.6	2.4	9.4	3.7	0.3	9.7	5.9	4.7	11.2	11.8	9	15.8	21.9	5.1	14.8	6	13.6	15.6	15.4	11.5	16.5	29.3	14.1	20.1	17	12.6	20.2	7.3	12.5	21.6	27.4	17	23.4	20.5
2020-06-12	164	1	nan	5.3	1.5	2.1	8.8	1.9	0.3	8.3	5.3	5	12.1	11.2	9	15.5	19.1	4.8	12.4	4.5	13	15.6	16.5	10.6	16.5	25.4	14.3	20.1	15.6	12.6	19.9	7.3	13	21.9	27.6	17.6	23.4	19.6
2020-06-12	164	Avg	0-15cm																																				0
2020-06-12	164	Avg	15-30cm																																				0
2020-06-12	164	Avg	30-45cm																																				0
2020-06-12	164	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
2020-06-12	164	0	nan	1.2	0.6	9.3	5.7	4.5	13.4	14.8	15.6
2020-06-12	164	1	nan	1.5	0.6	9.3	5.7	3.7	13.1	13.9	15.3
2020-06-12	164	2	nan	1.2	0.3	9.7	6	3.9	14	14.2	15
2020-06-12	164	3	nan	1.2	1.2	9	5.7	4.5	14	13.6	15.6
2020-06-12	164	Avg	0-15cm									0
2020-06-12	164	Avg	15-30cm									0
2020-06-12	164	Avg	30-45cm									0
2020-06-12	164	Avg	45-60cm									0

No TZ grass heigth found

No VR grass heigth found

Tree DBH

Date	Tag#	Reading (mm)
2020-06-12	1	25.2
2020-06-12	102	16.3
2020-06-12	2	23.0
2020-06-12	245	12.6
2020-06-12	3	15.4
2020-06-12	4	9.0
2020-06-12	6	16.0
2020-06-12	7	19.2
2020-06-12	72	9.4
2020-06-12	79	20.6

Water Potential - mode: raw

Time	Species	Tree	readings (bar)
2020-06-12 13:13:00	OAK	102	-23	-17	-27
2020-06-12 13:13:00	OAK	35	-35	-34	-36
2020-06-12 13:13:00	OAK	92	-31	-27	-26
2020-06-12 13:49:00	PINE	OLD	-1	-5	-4
2020-06-12 13:49:00	PINE	YNG	-1	-5	-7