Field Notes

<--2021-06-02 13:00:00 | 2021-07-13 11:50:00-->
Other sites visited today: Bouldin Corn | Vaira
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Tonzi: 2021-06-24 14:40:00 (DOY 175)
Author: Joe Verfaillie
Others:

Summary: Reinstalled cal panel IRT, added sun shield to open FD chamber, added water to Floor and soil co2 battery banks, swapped road well power pack.

Tonzi
2021-06-24

I arrive at about 14:40 PDT. It was clear sunny and hot with a variable breeze. There were some thunderheads to the northeast. The pond is nearly dry. From the top of the tower several oak tress seem to have some yellow leave on their tops. Some of the pines also seem to have clumps of brown needles. Iâ€™m not sure this is exceptional; maybe Iâ€™m hyper sensitive due the dry conditions this year.

I collected the eddy, met, soil moisture, well depth, dbh and zcam data. This was the first collection of the eddy data since upgrading the firmware â€“ no issues found.
The Tower 7500 read: 410.5ppm CO2, 511.5mmol/m3 H2O, 98.9kPa, 28.8C, 99.3SS
The Floor 7500 read: 415.8ppm CO2, 455.6mmol/m3 H2O, 99.0kPa, 32.2C, 101.2SS
I wonder if the difference in the water vapor is the trees.

Both scales fell off the dendrometer on tree 245 - I found the larger one. A couple of the other dendrometers had higher readings than expected. I'm wondering if woodpeckers are vandalizing them - pounding the ribbons into cracks.

I added a sun shield to the open FD chamber. The sun shield is a split piece of pipe the fits around the body of the chamber and a mirrored Mylar hat that bolts to the guywire ring. The other FD chamber is under the trees and doesnâ€™t get as hot but Iâ€™ll look at the data to see if it needs a sun shield too. I downloaded and cleared the FD data.

I finally got the wiring right on the Apogee IRT sn 1624 on the cal panel â€“ reinstalled and working.

I swapped the lithium power pack on the Global Water sensor. The last one died soon after my last visit. I might put a small solar panel on this one like the Vaira pond.

I checked the water level in the batteries on the Floor battery bank sn BB-TF and the soil co2 battery bank sn BB-TZ_soilco2. I didnâ€™t see any plates exposed but added about 1.5 gallons to each bank of four batteries. Iâ€™ll need to bring more water for the Tower batteries next time. We should probably check the Delta batteries too.

I left at about 17:30

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2021-06-24	VR_well	57.95
2021-06-24	VR_pond	14.92
2021-06-24	TZ_floor	31.95
2021-06-24	TZ_road	38.9
2021-06-24	TZ_tower	35.5

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] => Soil_Transect_4_3 [20] => Soil_Transect_3_3 [21] => Soil_Transect_2_3 [22] => Soil_Transect_1_3 [23] => SoilCO2_West_A_3 [24] => SoilCO2_West_B_3 [25] => SoilCO2_West_C_3 [26] => Tower_4 [27] => Soil_Transect_4_4 [28] => Soil_Transect_3_4 [29] => Soil_Transect_2_4 [30] => Soil_Transect_1_4 [31] => SoilCO2_West_A_4 [32] => SoilCO2_West_B_4 [33] => 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	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	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	Spacial Count
2021-06-24	175	0	nan	4.5	3.1	2.5	1.5	3	4.2	7.1	3.1	1.2	12.1	4.8	7.8	13.9	12.4	4.5	6.6	1.4	11.8	14.3	10.1	12.6	16.5	13.4	15.9	17.3	11.7	18.5	12.5	19.3	29.4	13.3	19.9	10.2	14.8
2021-06-24	175	1	nan	4.7	0.1	2.1	1.8	2.7	4.2	7.4		1.8	11.5		7.5	13	11.8	4.2	7.5		11.8	14.5	10.3	13.1	16.5	13.4	16.8		12	19.6	12.2	19.1	28.8	13.3	19.3		14.5
2021-06-24	175	Avg	0-15cm																																			0
2021-06-24	175	Avg	15-30cm																																			0
2021-06-24	175	Avg	30-45cm																																			0
2021-06-24	175	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
2021-06-24	175	0	nan	0.7	0.4	7.5	4.2	3.9	12	11.6	15
2021-06-24	175	1	nan	0.1	0.1	7.8	4.2	4.2	12.3	11.3	15
2021-06-24	175	Avg	0-15cm									0
2021-06-24	175	Avg	15-30cm									0
2021-06-24	175	Avg	30-45cm									0
2021-06-24	175	Avg	45-60cm									0

No TZ grass heigth found

No VR grass heigth found

Tree DBH

Date	Tag#	Reading (mm)
2021-06-24	1	13.7
2021-06-24	102	8.3
2021-06-24	2	13.8
2021-06-24	3	17.3
2021-06-24	4	11.9
2021-06-24	5	7.0
2021-06-24	6	20.7
2021-06-24	7	23.8
2021-06-24	72	12.6
2021-06-24	79	12.0