Field Notes

<--2010-03-11 11:50:00 | 2010-04-06 11:00:00-->
Other sites visited today: Twitchell Rice

Sherman Island: 2010-03-18 12:00:00 (DOY 77)
Author: Joe Verfaillie
Others: Jaclyn

Summary: Grass and pepper weed beginning to get ahead of the cows, changed web cam capture rate, checked on location for the levee experiment, Jacyln took soil samples (2 profiles)

Sherman
3/18/2010

Arrived about 12:00 PDT with Jaclyn. Warn and sunny, less wind than at Twitchell but still strong and out of the NNW though it might have swung a little to the west before leaving. The field is dry enough to drive on with small car. The water level in the ditch near the road is very low. Grass and pepper weed inside the cow fence is growing fast ï¿½ maybe better than 60cm. Outside the cow fence, the grass and pepper weed is beginning to get ahead of the cows, but still mostly clipped to less than 10cm.

LGR seemed to be in good order
12:16PST, 1.882ppm, 26.92C, 139.88Torr, 12.545usec, 10Hz

Computer and data loggers remain on PST ï¿½ change to PDT cause no problems

Swapped in calibrated LI7500 using SDM address 7
Sn 0065 off
Sn 0073 on

Also brought in LI7500 sn 0035 from second tower to calibrate before planned levee deployment in first week of April.

I changed the web cam capture rate and time period. It now captures an image every 10 minutes starting a 5am and stopping at 9pm. This creates 96 images a day that I am zipping into daily archives to reduce the clutter of small files.

I put a sunshade on the plant cam but it didnï¿½t seem to improve the image quality. I did not relocate the plant cam.

I brought in the HMP45 and solar shield on the soil moisture set. It was not giving good reading and the tower has that info. I shorted the second HMP45 channel on the soil moisture data logger for a zero, though I think all the soil moisture data is digital.

I checked on the location for the planed levee experiment. Still looks good, wide pull out with plenty of space. There are some old transformers on a power pole across the levee road from this location.

Jacyln measured soil moisture and took soil samples. Notes from her e-mail: "I measured soil moisture with the Moisture Point sensor and well depths. I've been entering the Moisture point and well depth measurements into the file SI_hydro_2010.xls on bspace (path: /NSF-Methane Resources/Data/Water Table & Field Notes). This week north well was 2.4ft, south well 1.55ft and enclosure well 1.4ft. I collected 2 soil profiles, one inside the enclosure and one outside the enclosure. I collected at greater distances than Twitchell: 1cm, 18cm, 30cm, 42cm, and 54cm below the surface. I measured CO2/CH4 efflux as with the Twitchell samples in the lab. Also, I collected 10 pepperweed leaves and analyzed these in the integrating sphere when I returned to the lab - Oliver, I'll send you the results from this later this afternoon or tomorrow."

0 photos found

7 sets found

No data found for SI_mp.
11 SI_met graphs found