Field Notes

<--2014-05-21 12:00:00 | 2014-06-05 13:10:00-->
Other sites visited today: Mayberry | Sherman Island | Twitchell Rice | West Pond | Twitchell Alfalfa

East End: 2014-05-29 14:30:00 (DOY 149)
Author: Cove Sturtevant
Others: Patty, Madeline

Summary: Water level low to reduce erosion. Observed constant ebullition. All well.

East End Wetland
2014-05-29

We arrived about 14:30 PDT. It was hot and sunny with a nice breeze. No significant plant growth yet. The water level has dropped considerably. In surrounding checks, only the channels are filled with water. In our check, much of the surface is still inundated but there is a large patch to the SW where the surface is exposed. I talked to Jim who reported that the water level has been lowered to reduce erosion of the berms. There is a ~8” diameter pipe sitting on the surface along the berm from the north end of the check to the tower. Perhaps to reduce erosion?

While I was downloading data, I followed a trail of bubbles to a point source that was frequently bubbling. At one point I also saw a larger bubble release from a spot about 4m away from the first. I think this indicates subsurface gas channels where gas flows laterally toward a point of low resistance to be released, and the currently low water pressure is facilitating the release of stored CO2 & CH4. It will be interesting to see the fluxes during this drawdown.

Downloaded data. No camera images. Patty found one of the power wires disconnected. Restart fine.

7500 readings:
CO2 = 15.2 mmol m-3 (15.6 after cleaning)
H2O = 369 mmol m-3 (315 after cleaning)
p = 101.3 kPa
t = 29.1 C
Diag: 248 (same after cleaning)
Sos: 346.8 m s-1

7700 readings:
CH4: 1.9 ppm
RSSI: 44% (58% after cleaning)
Reservoir was full.

MET looked good.
Cleaned Rad.

0 photos found

Graphs display:
11 sets found

14 EE_met graphs found

Explore the graph:Temperature and Batt V in a new window

Explore the graph:Soil Moisture and Well Pressure in a new window

Explore the graph:Solar Radiation in a new window

Explore the graph:PAR in a new window

Explore the graph:Soil Heat Flux in a new window

Explore the graph:Water Level and Rain in a new window

Explore the graph:Soil/Water Temperature Set 1 in a new window

Explore the graph:Soil/Water Temperature Set 2 in a new window

Explore the graph:Soil/Water Temperature Set 3 in a new window

Explore the graph:Dissolved Oxygen and Wind Speed in a new window

Explore the graph:SRS NDVI Channels in a new window

Explore the graph:Apogee NDVI in a new window

Explore the graph:NDVI in a new window

Explore the graph:Undercanopy PAR in a new window

Can't check EE_mixed
1 EE_mixed graphs found

Explore the graph:Air Pressure and RH in a new window

8 EE_flux graphs found

Explore the graph:Wind Speeds in a new window

Explore the graph:LI7500 CO2 and H2O in a new window

Explore the graph:LI7700 CH4 and RSSI in a new window

Explore the graph:Flux Counts in a new window

Explore the graph:Instument Temperatures in a new window

Explore the graph:Temp Tower 3 (Mixed Veg) in a new window

Explore the graph:Temp Tower 3 (Mixed Veg) in a new window

Explore the graph:Temp Tower 3 (Mixed Veg) in a new window

Can't check MBWPEESWGT_mixed
No data found for EE_cam.
Can't check MBEEWPSWEPGT_cam
Can't check SIMBTWEE_met
Can't check EE_Temp
5 EE_Temp graphs found

Explore the graph:Sonic SOS in a new window

Explore the graph:LI7500 CO2 in a new window

Explore the graph:Water Level in a new window

Explore the graph:LI-7700 CH4 in a new window

Explore the graph:Wind Speed in a new window

Can't check EE_minidot
1 EE_minidot graphs found

Explore the graph:EE miniDOT Dissolved Oxygen in a new window

Can't check MBSWEEWPBCBA
1 EE_processed graphs found

Explore the graph:CO2 Fluxes in a new window