Atmosphere-biosphere exchange of carbon dioxide in boreal forests
Journal Article
·
· Journal of Geophysical Research; (United States)
- National Center for Atmospheric Research, Boulder, CO (USA)
An ecophysiological model of photosynthesis and respiration by forest ecosystems was used to examine CO{sub 2} fluxes in 23 mature boreal forests near Fairbanks, Alaska. Simulated soil respiration, photosynthesis, decomposition, and moss and tree productivity were consistent with observed data. Monthly ecosystem CO{sub 2} flux and net photosynthesis, averaged over 23 sites, were correlated with atmospheric CO{sub 2} concentrations and {delta}{sup 13}C ratios, respectively, at Barrow, Alaska, suggesting the boreal forests of Alaska play an active role in the seasonal dynamics of atmospheric CO{sub 2} at Barrow. Only one of the 23 stands was a source of CO{sub 2}, and the 23 stands absorbed (mean {plus minus} SE) 1,173 {plus minus} 211 g CO{sub 2} m{sup {minus}2} yr{sup {minus}1}. Observed productivity in these forest spans the range of productivity in the circumpolar boreal forest, suggesting the simulated CO{sub 2} fluxes are representative of the circumpolar boreal forest. If so, metabolic activity in the circumpolar boreal forest results in a significant annual uptake of CO{sub 2}.
- OSTI ID:
- 5401221
- Journal Information:
- Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 96:D4; ISSN 0148-0227; ISSN JGREA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
540110*
ALASKA
ATMOSPHERIC CHEMISTRY
CARBON 13
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON ISOTOPES
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
DEGASSING
DEVELOPED COUNTRIES
ECOSYSTEMS
EVEN-ODD NUCLEI
FEDERAL REGION X
FORESTS
ISOTOPE RATIO
ISOTOPES
LIGHT NUCLEI
MASS TRANSFER
NORTH AMERICA
NUCLEI
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PLANTS
PRODUCTIVITY
RESPIRATION
SOILS
STABLE ISOTOPES
SYNTHESIS
TREES
UPTAKE
USA
540110*
ALASKA
ATMOSPHERIC CHEMISTRY
CARBON 13
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON ISOTOPES
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
DEGASSING
DEVELOPED COUNTRIES
ECOSYSTEMS
EVEN-ODD NUCLEI
FEDERAL REGION X
FORESTS
ISOTOPE RATIO
ISOTOPES
LIGHT NUCLEI
MASS TRANSFER
NORTH AMERICA
NUCLEI
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PLANTS
PRODUCTIVITY
RESPIRATION
SOILS
STABLE ISOTOPES
SYNTHESIS
TREES
UPTAKE
USA