Response of a tundra ecosystem to elevated atmospheric carbon dioxide and CO{sub 2}-induced climate change. Final report

The overall objective of this research was to document current patterns of CO{sub 2} flux in selected locations of the circumpolar arctic, and to develop the information necessary to predict how these fluxes may be affected by climate change. In fulfillment of these objectives, net CO{sub 2} flux wa...

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Bibliographic Details
Main Author: Oechel, W.C.
Other Authors: United States. Department of Energy. Office of Energy Research.
Format: Report
Language:English
Published: San Diego State Univ., Dept. of Biology, CA (United States) 1996
Subjects:
Climatic Change
Carbon Dioxide
Seasonal Variations
Environmental Impacts
Progress Report
Tundra
Methane
54 Environmental Sciences
Numerical Data
Arctic Regions
Air Pollution Monitoring
Arctic
Climate change
north slope
Alaska
Online Access:https://doi.org/10.2172/307995
http://digital.library.unt.edu/ark:/67531/metadc687029/
Description
Summary:The overall objective of this research was to document current patterns of CO{sub 2} flux in selected locations of the circumpolar arctic, and to develop the information necessary to predict how these fluxes may be affected by climate change. In fulfillment of these objectives, net CO{sub 2} flux was measured at several sites on the North Slope of Alaska during the 1990--94 growing season (June--August) to determine the local and regional patterns of seasonal CO{sub 2} exchange. In addition, net CO{sub 2} flux was measured in the Russian and Icelandic Arctic to determine if the patterns of CO{sub 2} exchange observed in Arctic Alaska were representative of the circumpolar Arctic, while cold-season CO{sub 2} flux measurements were carried out during the 1993--94 winter season to determine the magnitude of CO{sub 2} efflux not accounted for by the growing season measurements. Manipulations of soil water table depth and surface temperature, which were identified from the extensive measurements as being the most important variables in determining the magnitude and direction of net CO{sub 2} exchange, were carried out during the 1993--94 growing seasons in tussock and wet sedge tundra ecosystems. Finally, measurements of CH{sub 4} flux were also measured at several of the North Slope study sites during the 1990--91 growing seasons.

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