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  Climate change and Arctic ecosystems: I. Vegetation changes north of 55 degrees N between the last glacial maximum, mid-Holocene, and present

Bigelow, N. H., Brubaker, L. B., Edwards, M. E., Harrison, S. P., Prentice, I. C., Anderson, P. M., et al. (2003). Climate change and Arctic ecosystems: I. Vegetation changes north of 55 degrees N between the last glacial maximum, mid-Holocene, and present. Journal of Geophysical Research-Atmospheres, 108(D19), 8170. doi:10.1029/2002JD002558.

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Bigelow, N. H., Autor
Brubaker, L. B., Autor
Edwards, M. E., Autor
Harrison, S. P.1, Autor           
Prentice, I. C.2, Autor           
Anderson, P. M., Autor
Andreev, A. A., Autor
Bartlein, P. J., Autor
Christensen, T. R., Autor
Cramer, W., Autor
Kaplan, J. O.3, Autor           
Lozhkin, A. V., Autor
Matveyeva, N. V., Autor
Murray, D. F., Autor
Mcguire, A. D., Autor
Razzhivin, V. Y., Autor
Ritchie, J. C., Autor
Smith, B.2, Autor           
Walker, D. A., Autor
Gajewski, K., Autor
Wolf, V., AutorHolmqvist, B. H., AutorIgarashi, Y., AutorKremenetskii, K., AutorPaus, A., AutorPisaric, M. F. J., AutorVolkova, V. S., Autor mehr..
Affiliations:
1Research Group Paleo-Climatology, Dr. S. P. Harrison, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497765              
2Department Biogeochemical Synthesis, Prof. C. Prentice, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497753              
3Department Biogeochemical Systems, Prof. D. Schimel, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497754              

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Schlagwörter: vegetation maps, mid-Holocene, last glacial maximum, Arctic ecosystems, palaeoclimate, biomization Late-quaternary vegetation; wisconsin radiocarbon-dates; modern pollen spectra; 6000 years bp; contorta ssp latifolia; plant macrofossil data; c-14 yr bp; holocene vegetation; northwestern alaska; lake-sediments
 Zusammenfassung: [1] A unified scheme to assign pollen samples to vegetation types was used to reconstruct vegetation patterns north of 55degreesN at the last glacial maximum (LGM) and mid-Holocene (6000 years B. P.). The pollen data set assembled for this purpose represents a comprehensive compilation based on the work of many projects and research groups. Five tundra types (cushion forb tundra, graminoid and forb tundra, prostrate dwarf-shrub tundra, erect dwarf-shrub tundra, and low- and high-shrub tundra) were distinguished and mapped on the basis of modern pollen surface samples. The tundra-forest boundary and the distributions of boreal and temperate forest types today were realistically reconstructed. During the mid-Holocene the tundra-forest boundary was north of its present position in some regions, but the pattern of this shift was strongly asymmetrical around the pole, with the largest northward shift in central Siberia (similar tO200 km), little change in Beringia, and a southward shift in Keewatin and Labrador (similar tO200 km). Low- and high-shrub tundra extended farther north than today. At the LGM, forests were absent from high latitudes. Graminoid and forb tundra abutted on temperate steppe in northwestern Eurasia while prostrate dwarf-shrub, erect dwarf-shrub, and graminoid and forb tundra formed a mosaic in Beringia. Graminoid and forb tundra is restricted today and does not form a large continuous biome, but the pollen data show that it was far more extensive at the LGM, while low- and high-shrub tundra were greatly reduced, illustrating the potential for climate change to dramatically alter the relative areas occupied by different vegetation types.

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 Datum: 2003
 Publikationsstatus: Erschienen
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 Identifikatoren: DOI: 10.1029/2002JD002558
Anderer: BGC0655
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Titel: Journal of Geophysical Research-Atmospheres
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Washington, D.C. : American Geophysical Union
Seiten: - Band / Heft: 108 (D19) Artikelnummer: - Start- / Endseite: 8170 Identifikator: ISSN: 0148-0227
CoNE: https://pure.mpg.de/cone/journals/resource/991042728714264_1