Biogeosciences www.biogeosciences.net 1726-4170 1726-4189 6 6 2009 10.5194/bg-6-1115-2009 http://www.biogeosciences.net/6/1115/2009/ http://www.biogeosciences.net/6/1115/2009/bg-6-1115-2009.html http://www.biogeosciences.net/6/1115/2009/bg-6-1115-2009.pdf 1115 1126 2009-06-25 Contrasting carbon dioxide fluxes between a drying shrub wetland in Northern Wisconsin, USA, and nearby forests B. N. Sulman bnsulman@wisc.edu A. R. Desai B. D. Cook N. Saliendra D. S. Mackay Dept. of Atmospheric and Oceanic Sciences, University of Wisconsin – Madison, Madison, WI, USA Dept. of Forest Resources, University of Minnesota – Twin Cities, Minneapolis, MN, USA Institute for Applied Ecosystem Studies, US Forest Service Northern Research Station, Rhinelander, WI, USA Dept. of Geography, State University of New York – Buffalo, Buffalo, NY, USA Wetland biogeochemistry is strongly influenced by water and temperature dynamics, and these interactions are currently poorly represented in ecosystem and climate models. A decline in water table of approximately 30 cm was observed at a wetland in Northern Wisconsin, USA over a period from 2001–2007, which was highly correlated with an increase in daily soil temperature variability. Eddy covariance measurements of carbon dioxide exchange were compared with measured CO₂ fluxes at two nearby forests in order to distinguish wetland effects from regional trends. 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