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Climate change and Arctic ecosystems: 2. Modeling, paleodata-model comparisons, and future projections

Kaplan, J.O., Bigelow, N.H., Prentice, I.C., Harrison, S.P., Bartlein, P.J., Christensen, T.R., Cramer, W., Matveyeva, N.V., McGuire, A.D., Murray, D.F., Razzhivin, V.Y., Smith, B., Walker, D.A., Anderson, P.M., Andreev, A.A., Brubaker, L.B., Edwards, M.E. and Lozhkin, A.V. (2003) Climate change and Arctic ecosystems: 2. Modeling, paleodata-model comparisons, and future projections Journal of Geophysical Research, 108, (D19), 12-[17pp]. (doi:10.1029/2002JD002559).

Record type: Article

Abstract

Large variations in the composition, structure, and function of Arctic ecosystems are determined by climatic gradients, especially of growing-season warmth, soil moisture, and snow cover. A unified circumpolar classification recognizing five types of tundra was developed. The geographic distributions of vegetation types north of 55°N, including the position of the forest limit and the distributions of the tundra types, could be predicted from climatology using a small set of plant functional types embedded in the biogeochemistry-biogeography model BIOME4. Several palaeoclimate simulations for the last glacial maximum (LGM) and mid-Holocene were used to explore the possibility of simulating past vegetation patterns, which are independently known based on pollen data. The broad outlines of observed changes in vegetation were captured. LGM simulations showed the major reduction of forest, the great extension of graminoid and forb tundra, and the restriction of low- and high-shrub tundra (although not all models produced sufficiently dry conditions to mimic the full observed change). Mid-Holocene simulations reproduced the contrast between northward forest extension in western and central Siberia and stability of the forest limit in Beringia. Projection of the effect of a continued exponential increase in atmospheric CO2 concentration, based on a transient ocean-atmosphere simulation including sulfate aerosol effects, suggests a potential for larger changes in Arctic ecosystems during the 21st century than have occurred between mid-Holocene and present. Simulated physiological effects of the CO2 increase (to >700 ppm) at high latitudes were slight compared with the effects of the change in climate.

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Submitted date: 23 May 2002
Published date: 8 October 2003
Keywords: tundra, biome, vegetation modeling, biogeography, ice age, mammoths
Organisations: Environmental Processes & Change

Identifiers

Local EPrints ID: 14807
URI: http://eprints.soton.ac.uk/id/eprint/14807
ISSN: 0148-0227
PURE UUID: 54a27766-11c1-4a05-9f2b-2ebdad823c6a
ORCID for M.E. Edwards: ORCID iD orcid.org/0000-0002-3490-6682

Catalogue record

Date deposited: 02 Mar 2005
Last modified: 17 Jul 2017 16:52

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Contributors

Author: J.O. Kaplan
Author: N.H. Bigelow
Author: I.C. Prentice
Author: S.P. Harrison
Author: P.J. Bartlein
Author: T.R. Christensen
Author: W. Cramer
Author: N.V. Matveyeva
Author: A.D. McGuire
Author: D.F. Murray
Author: V.Y. Razzhivin
Author: B. Smith
Author: D.A. Walker
Author: P.M. Anderson
Author: A.A. Andreev
Author: L.B. Brubaker
Author: M.E. Edwards ORCID iD
Author: A.V. Lozhkin

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