Field Notes

Mayberry: 2014-07-31 10:00:00 (DOY 212)
Author: Cove Sturtevant
Others: Dennis, Patty

Summary: Moved portable tower to High Veg. Installed quick plugs on portable thermocouple leads. Sulfur smell at High Veg. Water samples at all sites. Fixed error in pressure measurement at permanent tower. Took photos for Ameriflux site visit. Lots of cattail her

Mayberry
2014-07-31

Portable Tower
We arrived at the Low Veg portable tower site at about 10:00 PDT and moved it to the High Veg site. I put quick release connectors on the thermocouple leads that plug into the 10x at both locations. They are labeled with letters corresponding to matching lettered connectors plugging into the 10x.

Downloaded the data. I took water samples at both locations. Took pictures of High Veg footprint. Good readings from the sonic, so the fix last week worked well.

I installed a longer post 15-20 m within the footprint of the High Veg site and attached the 10x box to it, installing permanently the thermocouple rod in about 20 cm of water with thick cattails around it.

There was a sulfur smell as I walked through the High Veg footprint.

Sonic N at Low Veg site: 275Â° N magnetic.
Tower height (High Veg): 3.33 m from sonic arm to truck bed, 61 cm from sonic arm to mid-sonic, 81 cm from truck bed to berm, ~30 cm from berm to water surface. Total height = 5.05 m

Readings after install at Low Veg
CO2: 385 ppm
H2O: 750 mmol m-3
signal strength = 91.4%
t: 23.7 Â°C
p = 101.3 kPa
sos = 346.8 m s-1
CH4: 1.95 ppm
RSSI: 49.5% (73% after cleaning)

Permanent Tower
All well. Collected data. Patty took water samples. There are A TON of caterpillars eating the cattails. The edges of the cattails look serrated due to all the herbivory (see photo). The tules do not appear affected.

I installed a new Met program fixing an error in the pressure readings. I also took lots of photos of the site setup for the Ameriflux folks.

Readings:
CO2: 393 ppm (same after cleaning)
H2O: 810 mmol m-3 (same after cleaning)
signal strength = 95.46 after cleaning
t: 25.5 Â°C
p = 101.2 kPa
sos = 347.8 m s-1
CH4 = 2.0 ppm (same after cleaning)
RSSI = 62% (after cleaning)
Reservoir full.
Met looked good.
Cleaned rad.

1 photos found

20140731MB_CattailHerbivory.jpg ( 2014-07-31 12:15:55 ) Full size: 1434x1920
The edges of the cattails look serrated due to all the herbivory