Field Notes

<--2011-09-16 09:00:00 | 2011-09-29 10:00:00-->
Other sites visited today: Vaira

Tonzi: 2011-09-23 10:00:00 (DOY 266)
Author: Joe Verfaillie
Others: Dennis, Naama, Sara

Summary: EMI survey, Tower IRGA blocked by bird dropping - cleaned, Floor computer okay, Dead tree list, changed z-cam programs.

Tonzi
2011-09-23

I arrived about 10PST with Dennis, Naama and Sara. It was clear, sunny, and hot. There is still water in Tonzi?s pond, but the ground is very dry. The trees still look good, but are beginning to lose leaves and there are acorns on the ground.

We did an EMI survey. The EMI sensor was bolted to a plastic snow sled with plastic bolts. This held the sensor?s center about 15cm above the ground. When dragging the sled the GPS unit was about 2.5m in front of the center of the EMI sensor.

Naama and Sara dragged the area to the north of the dirt road. Sara and I and Dennis dragged the area south of the road. It was difficult to stay on line and avoid rocks, down trees, and litter cages. Maybe next time I can add a layer to the GPS with pre ?defined lines. Also would be better to mount GPS antenna at the middle of the sled.

The tower IRGA?s path was blocked bird droppings about two days after our last visit a week ago. I cleaned the IRGA?s windows and extended the bird spikes on the top. The bird spikes on the sonic were also pushed to the side. I fixed this when I remounted the IRGA.

I checked on the Floor computer and it seemed to be running just fine. I made no changes.

I changed the programs on the z-cams to take images at 30 minute intervals (instead of 60 minute) before sunset.

Naama recorded GPS positions of root pits.

We noticed a number of dead trees:
Tag number Notes
230 Near Floor, lots of gopher holes
291 North of Floor site
11851
11859
11860 Three trunks of same tree
11861 Three trunks of same tree
11862 Three trunks of same tree
12044
12231
12307
12437
11935
12054
12173 Pine
12174 Pine

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