Field Notes

<--2018-02-28 13:40:00 | 2018-03-19 09:20:00-->
Other sites visited today: Twitchell Alfalfa

West Pond: 2018-03-07 12:40:00 (DOY 66)
Author: Daphne Szutu
Others: Joe

Summary: Leveled scaffolding, fixed Licor GHG columns, swapped camera enclosure

2018-03-07
West Pond

Joe and I arrived at 12:40. It was mostly sunny, warm with a cool breeze, and there were low clouds near the horizon.
I collected met and USB data. The LicorGHG columns had been storing extra sonic columns. Under Site Setup, I changed the sonic connection option from SmartFlux to 7550 Analog Inputs. Hopefully the sonic data has been ok. This seemed to fix the extra columns. I checked the time sync, clocks, pressure coefficients, and that the data was logging.

The 7500 read: 442ppm CO2, 446mmol/m3 H2O, 19.4C, 101.6kPa, 97SS
The 7700 read: 2.4ppm CH4 (after Joe started walking around in the mud), 57RSSI â€“ 77 after cleaning

Joe got in the water and raised the western side of the Scaffolding with the sheepherderâ€™s jack to level the tower. He attached two galvanized fence post pipes to the horizontal cross bars of the scaffolding frames with 90 degree clamps and placed a concrete pier under each pipe to spread out the weight. It was difficult to place the concrete piers in the correct position since the water was about thigh-deep, cold, and mucky on the bottom.

He leveled the sonic and radiometers and took some height measurements. Top of folding boom to water level: 3.69m. Top of canopy to water level: 1.8m.

I swapped the camera enclosure since the previous one tended to collect dew on the inside and tightened its connection to the wooden post. I restarted the camera but did not collect the camera data.

We left at 15:10.

1 photos found

20180307WP_scaffoldjack.JPG ( 2018-03-07 13:47:15 ) Full size: 1080x1440
Joe leveling the WP scaffolding by jacking up the tower, attaching new legs onto the tower, and positioning concrete pier blocks under the water.