Abstract
Ecological impacts of the recent warming trend in the Arctic are already noted as changes in tree line and a decrease in tundra area with the replacement of ground cover by shrubs in northern Alaska and several locations in northern Eurasia. The potential impact of vegetation changes to feedbacks on the atmospheric climate system is substantial because of the large land area impacted and the multi-year persistence of the vegetation cover. Satellite NDVI estimates beginning in 1981 and the Köppen climate classification, which relates surface types to monthly mean air temperatures from 1901 onward, track these changes on an Arctic-wide basis. Temperature fields from the NCEP/NCAR reanalysis and CRU analysis serve as proxy for vegetation cover over the century. A downward trend in the coverage of tundra group for the first 40 yr of the twentieth century was followed by two increases during 1940s and early 1960s, and then a rapid decrease in the last 20 yr. The decrease of tundra group in the 1920–40 period was localized, mostly over Scandinavia; whereas the decrease since 1990 is primarily pan-Arctic, but largest in NW Canada, and eastern and coastal Siberia. The decrease in inferred tundra coverage from 1980 to 2000 was 1.4 × 106 km2, or about a 20% reduction in tundra area based on the CRU analyses. This rate of decrease is confirmed by the NDVI data. These tundra group changes in the last 20 yr are accompanied by increase in the area of both the boreal and temperate groups. During the tundra group decrease in the first half of the century boreal group area also decreased while temperate group area increased. The calculated minimum coverage of tundra group from both the Köppen classification and NDVI indicates that the impact of warming on the spatial coverage of the tundra group in the 1990s is the strongest in the century, and will have multi-decadal consequences for the Arctic.
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References
CAVM Team: 2003, ‘Circumpolar Arctic Vegetation Map’. Scale 1:7,500,000. Conservation of Arctic Flora and Fauna (CAFF) Map No. 1. U.S. Fish and Wildlife Service, Anchorage, Alaska. [http://www.geobotany.uaf.edu/cavm].
Guetter, P. and Kutzbach, J. E.: 1990, ‘A modified Köppen classification applied to model simulations of glacial and interglacial climates’, Clim. Change 16, 193–215.
Justice, C. O., Townshend, J. R. G., Holen, B. N., and Tucker, C. J.: 1985, ‘Analysis of the phenology of global vegetation using meteorological satellite data’, Int. J. Remote Sens. 6, 1271–1218.
Kalnay, E., et al.: 1996, ‘The NCEP/NCAR 40-year reanalysis project’, Bull. Am. Meteorol. Soc. 77, 437–471.
Köppen, W.: 1931, ‘Grundriss der Klimakunde’, Walter de Gruyter, Berlin, 388pp.
Morison, J. V. et al.: 2001, ‘SEARCH: Study of Environmental Arctic Change, Science Plan’, Polar Science Center, University of Washington, Seattle, 85pp.
Myneni, R. B., Keeling, C. D., Tucker, C. J., Asrar, G., and Nemani, R. R.: 1997, ‘Increased plant growth in the northern high latitudes from 1981 to 1991’. Nature 386, 698–702.
Myneni, R. B., Tucker, C. J., Asrar, G., and Keeling, C. D.: 1998, ‘Interannual variations in satellite-sensed vegetation index data from 1981 to 1991’. J. Geophys. Res. 103, 6145–6160
New, M., Hulme, M., and Jones, P.: 1999, ‘Representing twentieth-century space-time climate variability Part I: Development of a 1961–90 mean monthly terrestrial climatology’, J. Clim. 12, 829–856.
New, M., Hulme, M., and Jones, P.: 2000, ‘Representing twentieth-century space-time climate variability, Part II: Development of 1901–96 monthly grids of terrestrial surface temperature’, J. Clim. 13, 2217–2238.
Overland, J. E., Spillane, M. C., and Soreide, N., N.: 2004a, ‘Integrated anaysis of physical and biological pan-Arctic change’, Clim. Change 63, 291–322.
Overland, J. E., Spillane, M. C., Percival, D. B., Wang, M., and Mofjeld, H. O.: 2004b, ‘Seasonal and regional variation of Pan-Arctic air temperature over the instrumental record’, J. Clim. (in press).
Percival, D. B., Overland, J. E., and Mofjeld, H. O.: 2002, ‘Interpretation of North Pacific variability as a short- and long-memory process’, J. Clim. 14, 4545–4559.
Przybylak, R.: 2003, ‘The Climate of the Arctic’, Kluwer Academic, Dordrecht, 270pp.
Serreze, M. C., et al.: 2000, ‘Observational evidence of recent change in the northern high-latitude environment’, Clim. Change 46, 159–207.
Serreze, M. C., et al.: 2003, ‘A record minimum Arctic sea ice extent and area in 2002’, Geophys. Res. Lett. 30, doi:10.1029/2002GL016406
Shiyatov, S. G.: 2003, ‘Rates of change in the upper treeline ecotone in the polar Ural mountains’, Past Global Changes (PAGES) News, Vol. 11, No.1.
Song, X., Dong, J., and Myneni, R. B.: 2003, ‘Improved NDVI, LAI and FPAR Data Sets’, (downloaded from ftp://crsa.bu.edu/pub/xiangdong/PDF/ndvi.lai.fpar.pdf)
Sturm, M., Racine, C., and Tape, K.: 2001, ‘Increasing shrub abundance in the Arctic’, Nature 411, 546–547.
Thompson, D. W. J. and Wallace, J. M.: 1998, ‘The Arctic oscillation signature in the wintertime geopotential height and temperature fields’, Geophys. Res. Lett. 25, 1297–1300.
Trewartha, G. T. and Horn, L. H.: 1980, ‘An Introduction to Climate’, 5th (edn.), McGraw-Hill, New York, 437pp.
Walsh, J. E., Chapman, W. L., and Shy, T. L.: 1996, ‘Recent decrease of sea level pressure in the central Arctic’, J. Clim. 9, 480–486.
Walter, H.: 1984, ‘Vegetation of the Earth and Ecological Systems of the Geobiosphere’, 3rd (edn.) Springer-Verlad, Berlin, 318pp.
Zhou, L., Tucker, C. J., Kaufimann, R. K., Slayback, D., Shabanov, N. V., and Myneni, R. B.: 2001, ‘Variations in northern vegetation activity inferred from satellite data of vegetation index during 1981 to 1999’, J. Geophys. Res. 106, 20069–20083.
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WANG, M., OVERLAND, J.E. Detecting Arctic Climate Change Using KÖppen Climate Classification. Climatic Change 67, 43–62 (2004). https://doi.org/10.1007/s10584-004-4786-2
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DOI: https://doi.org/10.1007/s10584-004-4786-2