Field Notes

<--2013-10-02 11:15:00 | 2013-10-24 12:00:00-->
Other sites visited today: Sherman Island | Mayberry | Twitchell Alfalfa | DWR Corn | West Pond

Twitchell Rice: 2013-10-16 11:25:00 (DOY 289)
Author: Cove Sturtevant
Others: Joe, Laurie, Pascal

Summary: Moved tower west ~10 m into field. Flooding working its way to the tower. Reinstalled ground sensors. Left wooden box open to get rid of critters. Initialized but aborted rain gauge test.

Twitchell Rice
2013-10-16

We arrived about 11:25 PDT. It was sunny, warm (21 C) and calm. The field is a bed of golden straw with a sprinkling of green shoots. Flooding of the field has begun, but only the north end of field 1 had visible standing water.

We moved the tower west about 10 m, into the rice field. The radiation boom was over the swath of cattails in front of the tower and unrepresentative of the footprint. After moving the tower we reinstalled all ground sensors and moved the rain gauge bucket also into the field (the cable wouldnt reach otherwise). We moved the serial and Ethernet cable connections to the logger box on the tower and left open the doors of the wooden box to encourage all the critters to move out. We initialized a rain gauge test but ended up aborting it to move the tower. Make sure to delete the rain measured from the test.

7500 readings:
CO2 = 399 ppm (420 after cleaning)
H2O = 450 mmol m-3 (370 after cleaning)
signal strength = 84.0% (87.6% after cleaning)
t = 22.4 C
p = 102.4 kPa
sos = 346.0 m s-1

7700 readings:
CH4 = 2.1 ppm (2.2 after cleaning)
RSSI = 21% (53% after cleaning)

4 photos found

view of field site
20131016TW_NewTower Location.jpg ( 2013-10-16 13:10:26 ) Full size: 1920x1440
view of field site

view of field site
20131016TW_EgretOnSheep.jpg ( 2013-10-16 11:08:37 ) Full size: 1920x1440
view of field site

Joe on site
TW_autocam_20131016_1015.jpg ( 2013-10-16 10:15:02 ) Full size: 1920x1440
Joe on site

Hawk on boom
TW_autocam_20131017_0845.jpg ( 2013-10-17 08:45:02 ) Full size: 1920x1440
Hawk on boom

Graphs display:
6 sets found

12 TW_met graphs found

Soil Heat Flux

Solar Radiation

Air Temperature

Soil Temperature Set 1

Soil Temperature Set 2

Soil Temperature Set 3

Water Temperature

RH and Pressure

Soil Moisture

Rain and Water Level

Disolved Oxygen

LED NDVI Channels

5 TW_flux graphs found

Sonic Anemometer Winds

LI7700 CH4 and RSSI

Twitchell CH4

LI7500 CO2 and H2O

Twitchel Rice Flux Counts

Can't check TWSI_mixed
Can't check SIMBTWEE_met
1 TW_cam graphs found

TW Rice Autocam

Can't check TATWBABCSB_cam