Field Notes

<--2020-07-28 11:00:00 | 2020-08-26 09:30:00-->
Other sites visited today: Tonzi | Vaira | Bouldin Alfalfa

Tonzi: 2020-08-26 08:30:00 (DOY 239)
Author: Joe Verfaillie
Others: Siyan, Gerardo JPL

Summary: JPL swapped radiometers, swapped 7500, tower loosing power (smoke?), 80% leaves turned brown, swapped road well power pack, OSU SP1 chewed wires spliced, new water potential tank.

Tonzi
2020-08-26

I arrived at about 8:30 PDT. Gerardo from JPL was there having arrived just before me. Siyan arrived later, about 10:30 after having visited Vaira. Maybe more than 80% of the trees have turned brown. A few individual trees still are mostly green (Liukangâ€™s tree, the small tree with IRTs), some trees have a mixture of brown and green but most trees look completely brown. There is still some water in the pond but even trees near the pond are brown. The ground is very hard and dry. The dust is pockmarked from recent thunderstorms but it doesnâ€™t look like much rain fell. Today was hazy. I could see Rancho Seco and there was only a hint of smoke in the air.

Gerardo swapped out the radiometers that had quit on the tower and was on his way out in an hour or so.

The 7500s were dirty from the rain. I swapped them out for calibration. On the Floor sn 75H-2514 came off and sn 0042 went on. On the Tower sn 75H-2180 came off and sn 0041 went on.
Floor 2514: 417.4ppm CO2, 513.5mmol/m3 H2O, 98.6kPa, 28.1C, 100.9SS â€“ after cleaning
Floor 0042: 416.9ppm CO2, 506.5mmol/m3 H2O, 99.1kPa, 29.6C, 99.9SS

Tower 2180: 380.3ppm CO2, 613.9mmol/m3 H2O, 98.5kPa, 27.7C, 96.2SS â€“ before cleaning
Tower 2180: 409.3ppm CO2, 491.0mmol/m3 H2O, 98.5kPa, 27.4C, 102.0SS â€“ after cleaning
Tower 0041: 416.6ppm CO2, 511.8mmol/m3 H2O, 98.4kPa, 28.6C, 101.0

The tower computer seemed okay. Some of the data logger files had not been updated but I was able to connect to the data loggers and update the files manually with no trouble. I had to reset the radio at the IRT CR1000 to get it to connect. The FLIR may have lost some images too but I was able to connect with it and its clock seemed to be correct. I didnâ€™t notice that the last of the FLIR images were blurry. The phenocamâ€™s clock got reset. I fixed it, but it is not clear if this was a one-time event or is happening each night when the camera is turned off. I need to be prepared to remove the relay next time if the clock get reset again.

I collected the FD chamber data and cleared their memories.

I noticed that some creature had chewed a couple of wires on the OSU SP1 system to pieces. One SHF and the PPT cable were shredded where they enter the box. I spliced them with some screw terminals for the time being. This looked like fox damage to me.

The lithium power pack at the road well was drained. I knew it was low and brought a fresh one for the swap. I also removed an extra length of power wire when I put the new power pack in.

I serviced the z-cams. All their clocks seemed good.

I brought a new small tank of breathing air for Siyan to do midday water potential. I was pretty sure the fittings were the same but Siyan says they werenâ€™t and that she was unable to do water potential.

The tower has been losing power since the 20th. This coincides with the heavy smoke in the area and it is classic solar power failure just before sunrise. None of the other solar system are losing power and I donâ€™t think the tower should be that close to the edge. I need to check to make sure something isnâ€™t pulling unusual amounts of power.

I left at about 11:30.

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2020-08-26	VR_well	58
2020-08-26	TZ_floor	29.8
2020-08-26	TZ_tower	34.3
2020-08-26	TZ_road	37.8
2020-08-26	VR_pond	14.56

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
2020-08-26	239	0	0-15cm	3.6	9.5	4.7	1.9	0.3	3	0.3	8.6	2.7	2.1
2020-08-26	239	0	15-30cm	10.9	8.1	4.2	6	13.3	1.8	4.2	6.9	2.7	11.8
2020-08-26	239	0	30-45cm	13.7	10.6		10.6	12	15.9	13.7	15.4	15.4	11.5
2020-08-26	239	0	45-60cm	18.8	2.7		11	17	27.1	13.3	16.2	22.5	17.3
2020-08-26	239	1	0-15cm	3.3	2.2	5	2.2	0.6	3.3	0.6	8.8	3.6	2.4
2020-08-26	239	1	15-30cm	10.9	8.4	6.3	6	13.3	11.6	4.5	6	0.8	11.5
2020-08-26	239	1	30-45cm	13.4	13.7		9.5	12.9	15.9	13.1	15.9	14.3	11.5
2020-08-26	239	1	45-60cm	16.8	2.4		11	17.3	26.8	13	16.2	23.1	16.8
2020-08-26	239	Avg	0-15cm	3.45	5.85	4.85	2.05	0.45	3.15	0.45	8.7	3.15	2.25	3.44	10	20
2020-08-26	239	Avg	15-30cm	10.9	8.25	5.25	6	13.3	6.7	4.35	6.45	1.75	11.65	7.46	10	20
2020-08-26	239	Avg	30-45cm	13.55	12.15		10.05	12.45	15.9	13.4	15.65	14.85	11.5	13.28	9	18
2020-08-26	239	Avg	45-60cm	17.8	2.55		11	17.15	26.95	13.15	16.2	22.8	17.05	16.07	9	18

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
2020-08-26	239	0	0-15cm	0.4	0.1
2020-08-26	239	0	15-30cm	7.5	3.9
2020-08-26	239	0	30-45cm	4.5	14
2020-08-26	239	0	45-60cm	14.5	17
2020-08-26	239	1	0-15cm	0.4	0.4
2020-08-26	239	1	15-30cm	7.5	3.5
2020-08-26	239	1	30-45cm	3.9	13.7
2020-08-26	239	1	45-60cm	13.6	17.3
2020-08-26	239	Avg	0-15cm	0.4	0.25	0.33	2	4
2020-08-26	239	Avg	15-30cm	7.5	3.7	5.6	2	4
2020-08-26	239	Avg	30-45cm	4.2	13.85	9.03	2	4
2020-08-26	239	Avg	45-60cm	14.05	17.15	15.6	2	4

No TZ grass heigth found

No VR grass heigth found

Tree DBH

Date	Tag#	Reading (mm)
2020-08-26	1	25.0
2020-08-26	102	2.9
2020-08-26	2	22.8
2020-08-26	245	11.5
2020-08-26	3	15.2
2020-08-26	4	8.9
2020-08-26	5	15.9
2020-08-26	7	19.1
2020-08-26	72	9.5
2020-08-26	79	19.9