Field Notes

<--2014-05-08 05:50:00 | 2014-06-11 05:00:00-->
Other sites visited today: Vaira

Tonzi: 2014-05-22 05:30:00 (DOY 142)
Author: Joe Verfaillie
Others:

Summary: Predawn water potential, cleaned co2 profile cell, tram brought in for repair, z-cams serviced, no Tower phenocam images, Floor HMP45 fan replaced.

Tonzi
2014/05/22

I arrived about 5:30am PDT for predawn water potential. Sunrise was about 5:47PDT according to NOAA, so it was not pitch dark. There was enough light to see by but no direct sun yet.

There are lots of flowers everywhere, but the ground is pretty dry and the grass is only still a little green in the low areas. Tonziâ€™s pond still only looks about half full. There was heavy dew on the grass and the zcam windows were wet â€“ maybe a little drizzle over night.

After water potential I checked on the tower. I could not find anything wrong with the LED sensor or the 4-chan radiation sensor that would cause the offset I see in the LED reflected blue channel or the SW-in channel. There was condensation in the diffuse PAR sensor. I replaced the desiccant pack inside the housing.

The tower did not collect Phenocam photos because the ftproot folder had been removed from the C drive. I fixed this and it was getting photos again. The Phenocam clock was okay.

I checked the Tower sonic heading (see photo). Magnetic north -72 degrees is 302 True.
The Floor sonic heading was magnetic north +16 degrees = 30 degrees True.
These match Siyanâ€™s iPhone readings of 308 and 25.

I went to Vaira about 8am.

I serviced the z-cams. Test photos at 1: 7:04, 2: 7:13, 3: 7:19

The tram was stuck mid-track again. I restarted it, but discovered a short circuit in the box and (independently?) the south motor seemed to lock up â€“ maybe it just needs some grease. I brought the tram in for maintenance.

I forgot to bring the well senor, so no well data. I could not find the trees that Siyan does DBH on, so no DBH data. I did the Moisture Point measurements. A number of the probes seem to be giving bad readings due to loose connections. We might replace the meter cable or buy some conductive grease to improve the connections.

I fixed the Loggernet display for the Soil CO2 system on the floor computer â€“ the labels now match the data.

I replaced the fan on the floor HMP45 that died several weeks ago.

The CO2 Profile readings were off scale. I cleaned the sample cell of the LI-820. There were a few grains of dust visible in the cell. After cleaning, I calibrated the system. Last cal was 2014-05-08. Zero was off more that -58ppm (railed). Span was off only by about 3ppm.

I did midday water potential before I left.

Field Data

CO2 Profile Tanks

Date	Tank	Pressure (psi)	ppm
2014-05-22	CO2	1700	402.68
2014-05-22	N2	500	0

No TZ Well data found

mode = both
Moisture Point Probes TZ
Array ( [0] => Tower [1] => Floor_South [2] => Floor_East [3] => Floor_West [4] => SoilCO2 [5] => Soil_Transect_3 [6] => Soil_Transect_2 [7] => Soil_Transect_1 [8] => SoilCO2_West_A [9] => SoilCO2_West_B [10] => SoilCO2_West_C [11] => Soil_Transect_4 )

Date	DOY	Rep	Depth	Tower	Floor_South	Floor_East	Floor_West	SoilCO2	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
2014-05-22	142	0	0-15cm	13	6.2	39.9	11.1	8	3.9	2.1	5.6	10.1	6.8	25.6
2014-05-22	142	0	15-30cm	10.9	16.4	22.5	13.3	9	13.9	15.2	6.9	9.7	0.3	18.2	10.9
2014-05-22	142	0	30-45cm	21.5	15.1	24.3	19	9	39.6	20.4	17.6	17.6	18.4		12.3
2014-05-22	142	0	45-60cm	41.4	13.6	19.9	11.1	11.1	41.1	35.4	14.2	31.4	25.4	15.9	13.9
2014-05-22	142	1	0-15cm	13	7.4	39.9	11.1	7.1	6.5	1.2	6.2	10.9	5.3
2014-05-22	142	1	15-30cm	11.5	16.4	33.8	13	10	16.1	15.5	6.3	7.8	6.6	16.7	11.2
2014-05-22	142	1	30-45cm	20.9	15.6	17	20.1	8.7	11.2	20.9	17.3	18.7	21.8	17.6	11.7
2014-05-22	142	1	45-60cm	41.4	12.2	24.2	11.1	11.1	31.7	45.1	14.2	31.1	27.1		13.9
2014-05-22	142	2	0-15cm											5.3	3.9
2014-05-22	142	2	15-30cm											15.8	11.8
2014-05-22	142	2	30-45cm											18.2	11.7
2014-05-22	142	2	45-60cm											25.9	13.9
2014-05-22	142	Avg	0-15cm	13	6.8	39.9	11.1	7.55	5.2	1.65	5.9	10.5	6.05	15.45	3.9	10.58	12	23
2014-05-22	142	Avg	15-30cm	11.2	16.4	28.15	13.15	9.5	15	15.35	6.6	8.75	3.45	16.9	11.3	12.98	12	26
2014-05-22	142	Avg	30-45cm	21.2	15.35	20.65	19.55	8.85	25.4	20.65	17.45	18.15	20.1	17.9	11.9	18.1	12	25
2014-05-22	142	Avg	45-60cm	41.4	12.9	22.05	11.1	11.1	36.4	40.25	14.2	31.25	26.25	20.9	13.9	23.48	12	25

mode = both
Moisture Point Probes VR
Array ( [0] => Solar_Panels [1] => Flux_Tower [2] => Gate [3] => Biomass_Cage )

Date	DOY	Rep	Depth	Solar_Panels	Flux_Tower	Gate	Biomass_Cage	Avg	Spacial Count	Measurement Count
2014-05-22	142	0	0-15cm	3.6	5.6	10.3	0.3
2014-05-22	142	0	15-30cm	7.8	10.3	12.7	4.5
2014-05-22	142	0	30-45cm	2.3	14.3	15.9	11.7
2014-05-22	142	0	45-60cm	13.9	26.8	11.6	14.2
2014-05-22	142	1	0-15cm	4.7	5.3	8.3	0.1
2014-05-22	142	1	15-30cm	7.8	10.3	8.7	4.8
2014-05-22	142	1	30-45cm	2	13.7	12	11.2
2014-05-22	142	1	45-60cm	13	26.2	11.3	13.9
2014-05-22	142	Avg	0-15cm	4.15	5.45	9.3	0.2	4.78	4	8
2014-05-22	142	Avg	15-30cm	7.8	10.3	10.7	4.65	8.36	4	8
2014-05-22	142	Avg	30-45cm	2.15	14	13.95	11.45	10.39	4	8
2014-05-22	142	Avg	45-60cm	13.45	26.5	11.45	14.05	16.36	4	8

No TZ grass heigth found

No VR grass heigth found

Tree DBH

Date	Tag#	Reading (mm)

Water Potential - mode: raw

Time< h>	Species	Tree	readings (bar)
2014-05-22 05:45:00	OAK	102	-4	-4	-5
2014-05-22 05:45:00	OAK	35	-8	-6	-7
2014-05-22 05:45:00	OAK	92	-4.5	-4.5	-4.5
2014-05-22 06:00:00	PINE	OLD	-6	-13	-8	-13
2014-05-22 06:00:00	PINE	YNG	-4.5	-8	-13	-9
2014-05-22 12:25:00	OAK	102	-11	-29	-27
2014-05-22 12:25:00	OAK	35	-24	-24	-35
2014-05-22 12:25:00	OAK	92	-15	-26	-28
2014-05-22 12:45:00	PINE	OLD	-22	-18	-18
2014-05-22 12:45:00	PINE	YNG	-12	-17	-10

No TZ Grass Biomass data found

Biomass TZ OakLeaves

Date	rep	LEAFNO (count)	LEAFAREA (cm2)	Green WETWT (g)	Green DRYWT (g)	Area/Leaf (cm2/leaf)	Green WETWT/AREA (g/m2)	Green DRYWT/AREA (g/m2)	Brown WETWT/AREA (g/m2)	Brown DRYWT/AREA (g/m2)
2014-05-22	0	63	213	6.27	3.38	3.38	294.37	158.69	0	0
2014-05-22	1	86	159.5	3.57	1.88	1.85	223.82	117.87	0	0
2014-05-22	2	51	175.7	4.9	2.69	3.45	278.88	153.1	0	0
2014-05-22	SUM
2014-05-22	CNT	3	3	3	3	3	3	3
2014-05-22	AVG					2.89	265.69	143.22