Field Notes

<--2022-03-10 12:15:00 | 2022-04-12 11:00:00-->
Other sites visited today: Vaira

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] => Floor_South [2] => Soil_Transect_3 [3] => Soil_Transect_2 [4] => Soil_Transect_1 [5] => SoilCO2_West_A [6] => SoilCO2_West_B [7] => SoilCO2_West_C [8] => Soil_Transect_4 )

Date	DOY	Rep	Depth	Tower	Floor_South	Soil_Transect_3	Soil_Transect_2	Soil_Transect_1	SoilCO2_West_A	SoilCO2_West_B	SoilCO2_West_C	Soil_Transect_4	Avg	Spacial Count	Measurement Count
2022-03-24	83	0	0-15cm	17.3	8.8	13.8	15	10.9	18.8	14.1	8.6
2022-03-24	83	0	15-30cm	23.1	11.1	21	21.3	9.7	16.1	7.5		11.2
2022-03-24	83	0	30-45cm	25.8	26.8	22.1	25.7	25.1	24.6	25.1	18.4	15.9
2022-03-24	83	0	45-60cm	35.7		27.4	40	23.9	34	25.6	26.2	19.3
2022-03-24	83	1	0-15cm	16.5	11.5	13.2	9.1	10.9	19.1	14.4	9.4	9.7
2022-03-24	83	1	15-30cm	22.8	13	20.6	22.5	10	16.1	7.8	17.6	12.1
2022-03-24	83	1	30-45cm	26	27.1	22.1	26.5	25.7	23.7	24.8	17.6	15.6
2022-03-24	83	1	45-60cm	36.5	15.3	26.8	42.8	23.6	34	25.9	25.6	19.9
2022-03-24	83	2	0-15cm								9.4
2022-03-24	83	2	15-30cm		11.8						17
2022-03-24	83	2	30-45cm		27.4						17.9
2022-03-24	83	2	45-60cm		16.8						26.5
2022-03-24	83	Avg	0-15cm	16.9	10.15	13.5	12.05	10.9	18.95	14.25	9.13	9.7	12.84	9	18
2022-03-24	83	Avg	15-30cm	22.95	11.97	20.8	21.9	9.85	16.1	7.65	17.3	11.65	15.57	9	19
2022-03-24	83	Avg	30-45cm	25.9	27.1	22.1	26.1	25.4	24.15	24.95	17.97	15.75	23.27	9	20
2022-03-24	83	Avg	45-60cm	36.1	16.05	27.1	41.4	23.75	34	25.75	26.1	19.6	27.76	9	19

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