Alaska ecosystem carbon fluxes estimated from MODIS satellite data inputs from 2000 to 2010

Carbon Balance and Management

Vanessa Genovese²  Steven Klooster²  Christopher Potter¹ 

[1] NASA Ames Research Center, Mail Stop 232-21, Moffett Field, CA 94035, USA;California State University Monterey Bay, Seaside, CA, USA

关键词: Alaska;    Ecosystems;    MODIS EVI;    Net carbon flux;   

Others  :  790510
DOI  :  10.1186/1750-0680-8-12

 received in 2013-08-06, accepted in 2013-11-19,  发布年份 2013

【 摘 要 】

Background

Trends in Alaska ecosystem carbon fluxes were predicted from inputs of monthly MODerate resolution Imaging Spectroradiometer (MODIS) vegetation index time-series combined with the NASA-CASA (Carnegie Ames Stanford Approach) carbon cycle simulation model over the past decade. CASA simulates monthly net ecosystem production (NEP) as the difference in carbon fluxes between net primary production (NPP) and soil microbial respiration (Rh).

Results

Model results showed that NEP on a unit area basis was estimated to be highest (> +10 g C m^-2 yr^-1) on average over the period 2000 to 2010 within the Major Land Resource Areas (MRLAs) of the Interior Brooks Range Mountains, the Arctic Foothills, and the Western Brooks Range Mountains. The lowest (as negative land C source fluxes) mean NEP fluxes were predicted for the MLRAs of the Cook Inlet Lowlands, the Ahklun Mountains, and Bristol Bay-Northern Alaska Peninsula Lowlands. High levels of interannual variation in NEP were predicted for most MLRAs of Alaska.

Conclusions

The relatively warm and wet years of 2004 and 2007 resulted in the highest positive NEP flux totals across MLRAs in the northern and western coastal locations in the state (i.e., the Brooks Range Mountains and Arctic Foothills). The relatively cold and dry years of 2001 and 2006 were predicted with the lowest (negative) NEP flux totals for these MLRAs, and likewise across the Ahklun Mountains and the Yukon-Kuskokwim Highlands.

【 授权许可】

   
2013 Potter et al.; licensee BioMed Central Ltd.

【 图 表 】

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