Field Notes

<--2013-09-11 09:00:00 | 2013-10-02 09:15:00-->
Other sites visited today: Mayberry | Twitchell Rice | DWR Corn | Twitchell Alfalfa | West Pond

Sherman Island: 2013-09-18 08:30:00 (DOY 261)
Author: Cove Sturtevant
Others: Joe, Laurie

Summary: Regular site visit and field work. Removed west moisture point sensor for repair.

Sherman
2013-09-18

We arrived about 08:30 PDT. It was partly cloudy, calm, and cool (17 C). The ditch to the north of the tower was brimming with water. Vegetation to the west of the tower continues to shrink in stature with continued cow trampling. For some reason the cows dont seem to enjoy the south or east of the field as much; the vegetation is clearly more trampled to the west. There is a patchy short green grass layer amidst the trampled pepperweed.

Joe and I attended to the tower while Laurie did moisture point and soil CO2 flux. The PC in the box restarted upon arrival.

Joe pulled the moisture point sensor sn 00000AB5408F in the west of the enclosure because it had some broken pins. Joe also did well depth and I did spectral measurements.

LGR readings: 2.0 ppm, 08:33, 25.25 C, 134.8 Torr (adjusted to 145.5 Torr), 12.56 us, 10 Hz

7500 readings:
CO2: 16.75 mmol m-3 (same after cleaning)
H2O: 620 mmol m-3 (same after cleaning)
diag: 248
p: 101.4 kPa
t: 18.8 C
sos: 343.7 m s-1

MET looked good.
Soil CO2 looked good.
Cleaned radiation instruments.

Water pressure sensor in the new perforated PVC tube was reading 0.89, water table height was 48 cm.

4 photos found

view of field site
20130918SI_ShipCove.jpg ( 2013-09-18 08:55:03 ) Full size: 1920x1440
view of field site

view of field site
20130918SI_ShipDiablo.jpg ( 2013-09-18 08:54:24 ) Full size: 1920x1440
view of field site

Someone on site
SI_autocam_20130918_0745.jpg ( 2013-09-18 07:45:02 ) Full size: 1920x1440
Someone on site

Cows and birds
SI_autocam_20130917_1745.jpg ( 2013-09-17 17:45:03 ) Full size: 1920x1440
Cows and birds

Graphs display:
7 sets found

No data found for SI_mp.
11 SI_met graphs found

Solar Radiation

Energy

Soil Temperatures Set 1

Soil Temperatures Set 2

Soil Temperatures Set 3

Soil Temperature at -16cm

LED NDVI Sensor Output

Solar Radiation from CNR1

Sherman Island Rain

Sherman Well Level

Box Temperatures

Can't check SI_mixed
2 SI_mixed graphs found

Theta Probes

Sherman Island Air Temperatures

4 SI_flx graphs found

Sonic Wind

CH4 Concentrations

Sample Counts

LI7500 CO2 and H2O

3 SI_soilco2 graphs found

Sherman Island Vaisala Soil CO2

Soil CO2 Temperatures

Soil CO2 Reference Soil Temperatures

Can't check TWSI_mixed
Can't check SIMBTWEE_met