Field Notes

<--2012-01-18 09:30:00 | 2012-02-01 09:00:00-->
Other sites visited today: Sherman Island | Mayberry | Twitchell Rice
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Tonzi: 2012-01-25 11:30:00 (DOY 25)
Author: Joe Verfaillie
Others:

Summary: Reinstalled Tram, swapped partially installed LI820 with original LI800, serviced z-cams, floor computer hung up - restarted, check sapflow stations.

Tonzi
2012-01-25

I arrived about 11:30PST. It was clear, sunny and warm with a nice west breeze. The ground was damp but still firm to walk on. Even the low areas were not soft. There was a puddle on the road. Tonzi?s pond did not look much fuller than before the rain. The grass looked a little happier.

I set the tram up on the track and it started up soon afterwards. It seemed like a strange time to start in that it is supposed to run on the hour. Turns out the program was set to run every 5 minutes and the tram quit 5 minutes into its run down the track. I fixed the program and saw the tram complete one full run and start another before I left.

I swapped the LI820 that Siyan started to install with the Li800 freshly returned from a checkup by Licor. The LI800 now has thermocouple connectors on its back side making it easier to remove. I?m not sure I got the thermocouples in the right locations on the data logger. The sample/outlet temperature should be lower than the cell/bench temperature. I set the filter to 0 seconds and turned on pressure compensation. I calibrated the LI800 with the tanks on site: N2 at 2250psi, 421.63ppm CO2 at 1800psi.
12:19PST, 942mB, 52.6C. Zero was +2.4 ppm off and span was 7.9ppm high.

Things at the top of the tower looked okay.

The floor computer was hung up when I got there. The data from the data loggers had a lot of repeated records in them like the computer had been starting and stopping a number of times. I didn?t look at the flux files. Probably power problems.

I tried to splice the serial line to the north sap flow station where it was chewed but still could not connect to that station. There might be problems at the station itself that I did not have time to check. The serial line is two conductors (black and white) plus shield. The south sap flow station had a dead battery that I removed and brought in. The east sap flow station had a good battery but the data logger had other problems so I moved the good battery to the south station. That station seemed to be working when I left. The west sap flow station had a good battery but the data logger may have problems.

I serviced the z-cams swapping cards and cleaning windows.

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

No TZ Tree DBH found

No water potential data found

No TZ Grass Biomass data found

No TZ OakLeaves Biomass data found

No TZ PineNeedles Biomass data found