Field Notes
<--2014-02-05 14:45:00 | 2014-03-07 10:35:00-->Other sites visited today: Sherman Island | Mayberry | East End | Twitchell Rice | West Pond
Twitchell Alfalfa: 2014-02-25 14:45:00 (DOY 56)
Author: Cove Sturtevant
Others: Dennis, Patty
Summary: Field extensively grazed by sheep. Moved 7700 over to East End. Regular field work. Data download. Reset radiation 10x.
| Twitchell Alfalfa 2014-02-25 We arrived about 14:45 PST, having first dropped off Joe and the new scaffold at East End. It was partly cloudy, warm, and breezy. About 2/3 of the field has been grazed to dirt by sheep which are presently confined to the middle third of the field. Should make for interesting fluxes. I downloaded data and cleaned the flux instruments while Dennis removed the 7700 (sn 0155) for install at East End. Patty took spectral measurements and cleaned the radiation sensors and solar panels. 7500 readings: CO2 = 394 ppm (410 after cleaning) H2O = 599 mmol m-3 (535 after cleaning) SS = 75.5% (77.87% after cleaning) T = 20.3 C p = 101.1 kPa sos = 346.5 m s-1 7700 readings: CH4: 2.3 ppm RSSI: 5% Reservoir was empty. MET looked good. The radiation 10x wasn’t working and the solar panel was flat. Tilted solar panel to the south and recycled connection from battery to solar controller. 10x restarted. |
3 photos found
20140225TA_SheepOnField.jpg ( 2014-02-25 15:21:20 ) Full size: 1920x1440
Sheep on the alfalfa field
20140225TA_AfterSheep.jpg ( 2014-02-25 15:23:01 ) Full size: 1920x1440
Already sheep mowed by tower.
TA_autocam_20140225_1545.jpg ( 2014-02-25 15:45:02 ) Full size: 1920x1440
Sheep on field
7 sets found
Can't check TA_met
11 TA_met graphs found
Can't check TA_rad
3 TA_rad graphs found
Can't check TA_flux
5 TA_flux graphs found
Can't check TA_soilco2
7 TA_soilco2 graphs found
No data found for TA_arable.
1 TA_cam graphs found
Can't check TATWBABCSB_cam