Palaeovegetational and palaeoenvironmental changes since the last deglacial in Gonghe Basin, northeast Tibetan Plateau

Auteur(s) et Affiliation(s)

CHENG, B.

College of Urban and Environmental Sciences, Central China Normal Univ., Wuhan, Chine

CHEN, F.

Key Lab. of Western China's Environmental Systems, Univ., Lanzhou, Chine

ZHANG, J.

Key Lab. of Western China's Environmental Systems, Univ., Lanzhou, Chine

Description :
The AA. present a high-resolution pollen record from a long sediment core (DLH) taken from Dalianhai, a terminal lake situated in the Gonghe Basin for reconstructing the vegetation and climate history since the last deglacial on the basis of a chronology controlled by 10 AMS 14C dates on plant remains preserved in the core sediments. The pollen assemblages in DLH core can be partitioned into 6 pollen zones characterized by the growth and decline of tree or herb pollen percentage. The change of pollen percentage and the evolution of palaeovegetation in Dalianhai since the last deglacial were similar to those recorded in Qinghai Lake. The maximum of forest development in the mid-Holocene was inconsistent with the period of stronger summer monsoon in the early Holocene indicated by stalagmite records, the reason might be related to the complexity of vegetation response to a large-scale climatic change.

Type de document :
Article de périodique

Source :
Journal of geographical sciences. Acta geographica sinica, issn : 1009-637X, 2013, vol. 23, n°. 1, p. 136-146, nombre de pages : 11, Références bibliographiques : 23 ref.

Date :
2013

Editeur :
Pays édition : Chine

Langue :
Anglais