Field Notes

<--2011-12-01 09:00:00 | 2011-12-18 00:00:00-->
Other sites visited today: Twitchell Rice | Vaira | Tonzi

Tonzi: 2011-12-01 10:00:00 (DOY 335)
Author: Joe Verfaillie
Others: Siyan, Laurie, Erika

Summary: Check Stardot, replace SFH5, brought sap flow serial lines out of the trees, fixed sap flow west and south.

Tonzi
2011-12-01

I arrived about 10:00 with Siyan, Laurie and Erika. It was clear and cool with strong gusty wind. The trees have lost most of their leaves. The grass is still green but doesn?t look like it has grown much. The ground is damp in low spots, but seemed dry in higher spots and under the trees.

I collected the Stardot camera photos. Looks like it ran okay but a few files were zero length.

I replaced SHF plate 5 sn 000144 on the under canopy met set. The one self-calibrating plate in the bunch has opposite wire colors.

The tube extension I taped to the end of the co2 profile pump outlet fell off. Still need a connector for it. It was so windy today I couldn?t hear the pump from the ground.

The tram had stopped. The battery was still above 12V. A power cycle sent it back to park and it then ran as normal. Maybe fighting against the wind caused the trip back to the east to time out. I inadvertently left a spare battery on the end of the track.

Siyan and I went to Vaira about 11:30.

Returning to Tonzi, I fished the serial lines to the North and East sap flow stations out of the trees. One of the ranchers had mentioned to me a while back that the wires were dangerous to cowboys riding through. We will see how long the lines last on the ground.

I resent the program to the west sap flow station (C1) and it seemed to start functioning again.

The south sap flow station (C478) had a very low battery (5V), I disconnected the heaters and the battery voltage began to climb. Maybe it will be okay after a day or two of solar power.

The east sap flow station (C56) has been down for a long time.

The north sap flow station (C23) has been working well. I found a soccer ball sized fungus growing on an oak branch near this station.

I cleaned the z-cam windows.

Siyan did the standard fieldwork, Laurie and Erika attempted to take soil and tree cores.

Field Data

No tank data

No TZ Well data found

No TZ Moisture Point data found

No VR Moisture Point data found

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)
2011-12-01 11:48:00	OAK	UNKNOWN	-11.5	-16	-16
2011-12-01 11:48:00	PINE	OLD	-21	-21	-6.5
2011-12-01 11:48:00	PINE	YNG	-4	-3.5	-10

OAK_UNKNOWN	Whole Study	20111201	11:48:00	twig/leaf cluster	-1.5	0.26	3
PINE_OLD	Whole Study	20111201	11:48:00	twig/leaf cluster	-1.6	0.84	3
PINE_YNG	Whole Study	20111201	11:48:00	twig/leaf cluster	-0.6	0.36	3