(Article of periodic en Anglais - 2008)

Document title

Numerical analysis of modern and fossil pollen data from the Tibetan plateau

Authors(s) and Affiliation(s)

SHEN C. (1 2) ; LIU K.-B. (3) ; TANG L. (2) ; OVERPECK J.T. (4) ;
(1) Atmospheric Sciences Research Center, State Univ. of New York, Albany, ETATS-UNIS
(2) Nanjing Inst. of Geology and Paleontology, Nanjing, CHINE
(3) Dept. of Oceanography and Coastal Sciences, State Univ., Louisiana, ETATS-UNIS
(4) Inst. for the Study of Planet Earth and Dept. of Geosciences, Univ. of Arizona, ETATS-UNIS


This study applies a number of multivariate numerical techniques in the analysis of modern and fossil pollen data for the purpose of paleovegetational reconstruction in the Tibetan Plateau. Modern pollen spectra from 227 sampling sites in the Tibetan Plateau were classified into groups using cluster analysis and detrended correspondence analysis. By comparing the quantitatively derived groups with local vegetation types at sampling locations, the modern pollen spectra were assigned into 5 major vegetation types : shrubland, forest, meadow, steppe, and desert. These were used as a priori groups for discriminant analysis. The discriminant functions were then applied to a fossil pollen record from Yidun Glacial Lake near the Sichuan-Tibet border to reconstruct the major pattern of vegetational changes since the last glacial maximum. The results demonstrate that discriminant analysis is a useful technique for reliable reconstruction of paleovegetation in the Tibetan Plateau


Article of periodic

published at : Annals of the Association of American Geographers / ISSN 0004-5608 / CODEN AAAGAK

Editor : Association of American Geographers, Washington, DC - ETATS-UNIS (1911)

Millesime : 2008, vol. 98, no4 [pp. 755-772]

Bibliographic references : 52 ref.

Collation : 8 fig., 2 tabl.




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