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ITEX: Canopy structure and CO2 exchange of arctic ecosystems.Non Acridic Tussock tundra flux measurements


 Field research sites will be at Toolik Field Station and nearby Imnavait Creek in northern Alaska, at the Barrow Arctic Science Consortium in Barrow, Alaska , at the Northeast Science Station, Cherskii, Russia, and at Thule, Greenland. At all sites a primary goal will be to expand the range of vegetation types included in our data base on canopy structure (especially LAI and N content), CO2 fluxes, and production biomass relationships, by surveying a wide range of systems dominated by different plant forms. At Toolik Lake we will focus on trajectories of change, working in longterm experimental plots of the Arctic LTER project based there . At Imnavait Creek, Cherskii, and Barrow we will also work on upscaling our results, by systematic sampling of different patches of vegetation in the footprints of established eddy covariance flux towers.

 As in the past several summers, we will work at Toolik Lake and nearby Imnavait Creek all summer long for all three years, taking a smaller crew on 3-6 week expeditions to the other sites in mid-summer (to Barrow in year 1, to Cherskii in Year 2, and to Thule and/or northern Canada in Year 3).  All sites have well-established, well-described research areas in diverse vegetation types within walking or driving distance of the labs. 

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