News

Publication of Imnavait data in Ecosphere

Jan
30

We have a new paper out in Ecosphere this month discussing multiyear results of our work at Imnavait Cr.  Click here for the abstract or the full article, titled Seasonal Patterns of Carbon Dioxide and Water Fluxes in Three Representative Tundra Ecosystems in Northern Alaska.

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Renewal proposal is funded

Nov
01

The National Science Foundation has approved our renewal proposal to continue and expand monitoring of carbon, water and energy fluxes at the established AON sites in Alaska and Russia. Understanding the role of these key processes in regulating basic ecosystem functions and their response to climate change remain the primary objectives of our research. Through continuing collaborations between UAF, U-M and MBL, we will also initiate studies of methane flux at the Fen station and water chemistry at Imnavait Cr. In 2012, the Tussock station will be upgraded to year-round data collection and the Fen station will begin continuous methane flux monitoring.

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Imnavait Cr sites are prepared for winter

Oct
28

The Ridge and Fen stations were prepared for their fifth winter season of year-round eddy covariance measurements. The seasonally operated Tussock station will revert to recording only meteorological data for the darkest portion of winter. All gas analyzers were calibrated, and communications equipment is now fine tuned for power savings during winter operation.

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A successful visit to Cherskiy, Russia

Sep
27

Operations were restored to the carbon dioxide flux component at the 35m tower in Pleistocene Park (near Cherskiy). The eddy covariance instruments were calibrated and redeployed after wiring failures halted data collection in spring 2010. We are looking forward to continuing both the carbon dioxide and methane flux measurements in Siberia and are currently planning further improvements.

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Imnavait webcam repaired

Jul
29

A replacement webcam was installed at the Imnavait Cr. Ridge site after the previousunit failed in March. The angle and field of view are comparable, though slightly different, to those of the previous camera. Check back soon for an improved webcam archiving tool. Please visit here for more local image monitoring from nearby Toolik Field Station.

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Version system introduced to AON data sets

Jul
01

The Data page now displays a version number along side each data set, with a corresponding number appearing within the file header. Version numbers are automatically updated if files are updated or reprocessed. This will help ensure that data users are able to easily see if a file is up to date. All files from prior years were set to version 10 by default. Contact Colin Edgar for more details.

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Tussock Station at Imnavait Creek now operational

Mar
03

The Tussock station is up and running at Imnavait Creek. It is operating this season with an improved power system and will collect data until mid-October, when it enters hibernation for the winter.

Tussock

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Presentation of AON data at 2011 AmeriFlux meetings

Jan
15

Dr. Eugenie Euskirchen is presenting data from the Imnavait Creek sites at the 2011 AmeriFlux/NACP meetings in New Orleans, LA.

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Winter site visits planned in Alaska

Jan
01

The UAF technician will be making periodic winter maintenance trips to the tower sites at Imnavait Creek. In mid-December the gas analyzers were calibrated and some communication upgrades were made.

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Presentation of Imnavait Creek data at 2010 AGU conference

Dec
01

Dr. Eugenie Euskirchen is presenting the first three years of tower data from the heath, tussock and wet sedge tundra sites at Imnavait Creek, Alaska during the 2010 Fall meetings of the American Geophysical Union (AGU) in San Francisco, CA. Former AON project member Anja Kade also will also present there. Both posters can be found here.

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