Field Notes

<--2012-08-08 10:30:00 | 2012-08-22 10:30:00-->
Other sites visited today: Vaira | Tonzi

Tonzi: 2012-08-22 10:00:00 (DOY 235)
Author: Joe Verfaillie
Others: Siyan, Martin, Nhat, Sunny

Summary: Martin did leaf survey, Siyan did standard field work, I removed the old web cam, the co2 profile pump was stuck and restarted, lots of brown leaves.

Tonzi
2012-08-22

I arrived about 10:00am PDT with Martin, Siyan, Nhat and Sunny. It was clear, sunny and warm on its way to hot. There was a light breeze from the west. Many of the trees have brown leaves. Not so much a scattering of brown leaves on all trees but more of individual trees being mostly brown. The leaves were brown and dead looking and not so yellow and senescent. This was visible in trees from Twin Cities Road all the way to Tonzi. There are acorns on the trees, but not as many as last year.

We unloaded and assembled the scaffolding for Martin’s leaf survey work and then went to Vaira. We returned from Vaira about 12:45pm PDT.

Siyan did midday water potential. The existing tanks at the water potential only had about 500psi in them – not enough for the dry conditions. So we borrowed the CO2 tank from the CO2 profile system on the tower that had 1000psi.

The pump for the CO2 profile system was not running. I banged on it and it started up again. Probable carbon buildup inside is blocking the brushes. New pumps should be here next week. Otherwise the system seemed to be running okay.

I removed the old web cam from the tower. It was plugged into the 5V channel on the CR23X. The Phenocam is running on the SW12V port of the 23X.

The radiation sensors looked clean

The Tram was running.

Both the Floor and Tower computers restarted when Siyan tried to collect data.

The USC soil moisture equipment (small solar panel, battery, antenna and two small equipment boxes) are mounted on the tower on the level below the CO2 profile equipment. Walking around on the ground I could only see four or the remote nodes.

Z-cam windows looked clean.

We saw Mr Tonzi as he headed out to a neighbor’s for dinner. He looked well.

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2012-08-22	TZ_floor	27.4
2012-08-22	TZ_road	36.3
2012-08-22	TZ_tower	32

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)
2012-08-22	1	21.8
2012-08-22	102	13.9
2012-08-22	2	14.5
2012-08-22	245	10
2012-08-22	3	18.2
2012-08-22	4	3.1
2012-08-22	5	23.9
2012-08-22	7	15.5
2012-08-22	72	11.1
2012-08-22	79	10.9
2012-08-22	8	6.7