Field Notes

<--2011-04-15 00:00:00 | 2011-04-22 00:00:00-->
Other sites visited today: Vaira | Mayberry | Tonzi
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Tonzi: 2011-04-15 12:00:00 (DOY 105)
Author: Joe Verfaillie
Others: Siyan (Sunny, Alex)

Summary: Serviced z-cams - advanced image collection one hour, Fixed unsetup DAC channels on tower LI-7500, changed co2 profile filters.

Tonzi
4/15/2011

I arrived about noon time PDT with Siyan (and Sunny and Alex). It was warm and sunny with some high thin clouds and a light breeze from the west. The ground is much drier but Tonzi’s pond is still full and the wells are still high. There are lots of flowers, but maybe not as much as last year, though it may still be early. The trees have put on lots of leaves, but maybe not as much as Vaira. Maybe about 70% complete.

I serviced the z-cams. All seemed well. I advanced the time on the cameras for the lengthening days. For z-cam one and two I changed the CR10X program from 900 and 1021 (3pm and 5pm) PST to 960 and 1081 (4pm and 6pm) PST. For z-cam three I changed the CR200 clock from 3:18 to 2:15 which makes the image start an hour later. The cameras time tag the images with their internal clocks.

Siyan noticed that the LI-7500 channels on the tower were both zero and I discovered that the DAC channels on the LI-7500 had not been setup. This is the LI-7500 that was recently returned from repair at Licor and probably had been reset to default settings. Two weeks of LI-7500 data lost from the tower top.

I changed the filters in the CO2 profile inlets and replaced two of the funnels. The filter at top inlet was really dirty but the others were okay. I left wrenches, spare filters and funnels in the computer box.

Tram was running.

Sensors at the tower top were okay. I cleaned a little bird poop off of the pyranometer.

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2011-04-15	TZ_floor	10.09
2011-04-15	TZ_road	19.4
2011-04-15	TZ_tower	13.9

No TZ Moisture Point data found

No VR Moisture Point data found

No TZ grass heigth found

No VR grass heigth found

No TZ Tree DBH found

Water Potential - mode: raw

Time	Species	Tree	readings (bar)
2011-04-15 12:04:00	OAK	UNKNOWN	-10.6	-11	-15
2011-04-15 12:04:00	PINE	UNKNOWN	-16.5	-17	-22

No TZ Grass Biomass data found

No TZ OakLeaves Biomass data found

No TZ PineNeedles Biomass data found

10 photos found

tz_7696.jpg ( 2011-04-15 12:46:17 ) Full size: 1600x1200
Green grass and oak trees with fresh leaves

tz_7695.jpg ( 2011-04-15 12:46:10 ) Full size: 1600x1200
Green grass and oaks with new leaves

20110415TZ_ViewOfFloor.jpg ( 2011-04-15 11:49:25 ) Full size: 2560x1920
New leaves and green grass from the tower top

20110415TZ_ViewToRanchoSeco.jpg ( 2011-04-15 11:50:12 ) Full size: 2560x1920
View of pretty new green leave on the oaks and green grass from tower top