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The influence of climate on peatland extent in Western Siberia since the Last Glacial Maximum.

ABSTRACT: Boreal and subarctic peatlands are an important dynamical component of the earth system. They are sensitive to climate change, and could either continue to serve as a carbon sink or become a carbon source. Climatic thresholds for switching peatlands from sink to source are not well defined, and therefore, incorporating peatlands into Earth system models is a challenging task. Here we introduce a climatic index, warm precipitation excess, to delineate the potential geographic distribution of boreal peatlands for a given climate and landscape morphology. This allows us to explain the present-day distribution of peatlands in Western Siberia, their absence during the Last Glacial Maximum, their expansion during the mid-Holocene, and to form a working hypothesis about the trend to peatland degradation in the southern taiga belt of Western Siberia under an RCP 8.5 scenario for the projected climate in year 2100.

SUBMITTER: Alexandrov GA

PROVIDER: S-EPMC4837369 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature

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The influence of climate on peatland extent in Western Siberia since the Last Glacial Maximum.

Alexandrov G A GA Brovkin V A VA Kleinen T T

Scientific reports 20160420

Boreal and subarctic peatlands are an important dynamical component of the earth system. They are sensitive to climate change, and could either continue to serve as a carbon sink or become a carbon source. Climatic thresholds for switching peatlands from sink to source are not well defined, and therefore, incorporating peatlands into Earth system models is a challenging task. Here we introduce a climatic index, warm precipitation excess, to delineate the potential geographic distribution of bore ...[more]

PMID: 27095029

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