Field Notes

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Tonzi: 2022-03-24 12:30:00 (DOY 83)
Author: Joe Verfaillie
Others:

Summary: Tower house keeping, swapped IRGAs for calibration, fixed cow fences, flipped calkit PAR, mounted solar panel to Road well cap

Tonzi
2022-03-24

I arrived at about 12:30. It was clear sunny and warm with a very light breeze from the west. In quite moments I could hear the drone of busy insects. The trees mostly have leaves though there are a sprinkling of trees mostly west of the tower where the leaves are still just coming on – LiuKang’s tree and the IRT tree are a couple of the late bloomers. The ground surface is dry. There were a bunch of young cows around and some of them halfheartedly followed the truck hoping I would feed them. Late in the day the young cow punks stood around and watched me repair the fences they had destroyed. I put in three more posts for a few of the long spans. After I was done I turned on the power and the cows came to check out the fence – at least one of them got shocked! The only cow damage I noticed was some light chewing on the new Ethernet cable at the tower and the zcam 1 cable.

I started to clean up the tower a little bit for the impending safety inspection. I removed a small motorcycle battery, box and small solar panel from the top – I think it was used to power the met data logger but hasn’t been used in years. I also cleaned up the SMAP equipment – removing tape, hose clamps, cable ties and baling wire in favor of a scaffolding clamp and U-bolts. I also bolted the battery boxes to the platform using fender washers. The SMAP stuff needs more work but it’s much better. I added some cable ties down the northwest corner to manage the cables.

At the Tower top I moved the calkit PAR sensor sn 212225 from the incoming position to the reflected position and collected the data. I cleaned the Pheoncam window. The window is loose and needs some silicon to glues it back in place.

I swapped the 7500s for calibration. On the Tower sn 75H-2180 came off and sn 0418 went on. At the Floor sn 0073 came off and sn 75H-2514 went on.
Tower 2180: 409.4ppm CO2, 533.0mmol/m3 H2O, 99.2kPA, 23.6C, 100.4SS
Tower 0418: 419.0ppm CO2, 431.1mmol/m3 H2O, 99.2kPa, 23.2C, 100.5SS
Floor 0073: 399.0ppm CO2, 523.8mmol/m3 H2O, 99.2kPA, 27.3C, 102.0SS
Floor 2514: 422.1ppm CO2, 353.6mmol/m3 H2O, 99.2kPa, 27.3C, 100.0SS
I updated the pressure coefficients and reset the boxes. I think the change in values is mostly due to the IRGAs I took off being a little dirty. The mount for the bird spikes on 0418 came off so it has no bird spikes for now.

I collected the flux, met, camera and FD data. I did the well, DBH and soil moisture measurements. I serviced the zcams.

The small solar panel I took off the Tower top had a nice plate on the back that made it possible to mount it on the road well cap. I removed the other small panel that the cows have been kicking around and hope this new mounting is strong enough to resist them.

I was hoping to install three new soil matrix water potential sensors from the Ameriflux year of water, but I ran out of time. It was a bit rushed anyway having only received the sensors yesterday – I can do a better job preparing them now and install them next time.

I brought in three segments of the old radiation tram track to be reused most immediately for the advection experiment at BA.

I left at about 17:15 PDT

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2022-03-24	VR_well	53.3
2022-03-24	VR_pond	18.72
2022-03-24	TZ_floor	25.4
2022-03-24	TZ_road	33.65
2022-03-24	TZ_tower	28.9

mode = both
Moisture Point Probes TZ
Array ( [0] => Tower_1 [1] => Floor_South_1 [2] => Soil_Transect_3_1 [3] => Soil_Transect_2_1 [4] => Soil_Transect_1_1 [5] => SoilCO2_West_A_1 [6] => SoilCO2_West_B_1 [7] => SoilCO2_West_C_1 [8] => Tower_2 [9] => Floor_South_2 [10] => Soil_Transect_4_2 [11] => Soil_Transect_3_2 [12] => Soil_Transect_2_2 [13] => Soil_Transect_1_2 [14] => SoilCO2_West_A_2 [15] => SoilCO2_West_B_2 [16] => Tower_3 [17] => Floor_South_3 [18] => Soil_Transect_4_3 [19] => Soil_Transect_3_3 [20] => Soil_Transect_2_3 [21] => Soil_Transect_1_3 [22] => SoilCO2_West_A_3 [23] => SoilCO2_West_B_3 [24] => SoilCO2_West_C_3 [25] => Tower_4 [26] => Soil_Transect_4_4 [27] => Soil_Transect_3_4 [28] => Soil_Transect_2_4 [29] => Soil_Transect_1_4 [30] => SoilCO2_West_A_4 [31] => SoilCO2_West_B_4 [32] => SoilCO2_West_C_4 [33] => Soil_Transect_4_1 [34] => SoilCO2_West_C_2 [35] => Floor_South_4 )

0000

Date	DOY	Rep	Depth	Tower_1	Floor_South_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	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	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	Soil_Transect_4_1	SoilCO2_West_C_2	Floor_South_4	Spacial Count
2022-03-24	83	0	nan	17.3	8.8	13.8	15	10.9	18.8	14.1	8.6	23.1	11.1	11.2	21	21.3	9.7	16.1	7.5	25.8	26.8	15.9	22.1	25.7	25.1	24.6	25.1	18.4	35.7	19.3	27.4	40	23.9	34	25.6	26.2
2022-03-24	83	1	nan	16.5	11.5	13.2	9.1	10.9	19.1	14.4	9.4	22.8	13	12.1	20.6	22.5	10	16.1	7.8	26	27.1	15.6	22.1	26.5	25.7	23.7	24.8	17.6	36.5	19.9	26.8	42.8	23.6	34	25.9	25.6	9.7	17.6	15.3
2022-03-24	83	2	nan								9.4		11.8								27.4							17.9								26.5		17	16.8
2022-03-24	83	Avg	0-15cm																																					0
2022-03-24	83	Avg	15-30cm																																					0
2022-03-24	83	Avg	30-45cm																																					0
2022-03-24	83	Avg	45-60cm																																					0

No VR Moisture Point data found

No TZ grass heigth found

Grass Height VR 17

Date	Height reps (cm)																	Location	Average	Samp	STDEV
2022-03-24	5	2	20	14	7	15	11	7	7	8	5	5	4	5	7	3	7	GH_ALL	7.76	17	4.57

Tree DBH

Date	Tag#	Reading (mm)
2022-03-24	1	18.9
2022-03-24	102	15.7
2022-03-24	2	16.3
2022-03-24	245	4.3
2022-03-24	3	20.2
2022-03-24	4	16.5
2022-03-24	5	8.9
2022-03-24	6	20.3
2022-03-24	7	9.8
2022-03-24	72	13.4
2022-03-24	79	13.1