Environmental variability within the Chinese desert-loess transition zone over the last 20 000 years

W. J. Zhou, J. Dodson, M. J. Head, B. S. Li, Y. J. Hou, X. F. Lu, D. J. Donahue, A.J. Timothy Jull

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Abstract

The desert/loess transition zone in northern China is sensitive to climate variability, which is controlled mainly by the relative strengths of the East Asian summer and winter monsoons. Sandy loess layers found in the Loess Plateau and palaeosol sequences found in the sandy desert demonstrate latitudinal shifts of the southern desert margin over the last 20 000 years. Stratigraphic investigations together with radiocarbon and some thermoluminescence dating, show that during the last glacial maximum the desert margin was at its most southerly position (38°N). During the early Holocene, it moved northward about three degrees in latitude (41°N). At present, the desert margin is again close to its most southerly position (38°21′N), yet the northern boundary position of modern summer monsoon activity is placed at 41°45′N, which is close to the estimated Holocene Optimum desert margin (41°N). This situation cannot be explained from natural climate models. Hence, an external driving mechanism needs to be considered, and the most obvious one is that caused by human activity on the natural environment over the last 3000 years. Historical evidence tends to reinforce this consideration.

Original languageEnglish (US)
Pages (from-to)107-112
Number of pages6
JournalHolocene
Volume12
Issue number1
DOIs
StatePublished - 2002

Fingerprint

transition zone
loess
desert
monsoon
Holocene
thermoluminescence
summer
paleosol
Last Glacial Maximum
Loess
climate modeling
human activity
plateau
winter
climate
Summer

Keywords

  • China
  • Desert-loess boundary
  • Desertification
  • Human impact
  • Loess Plateau
  • Monsoons
  • Natural environment

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Environmental variability within the Chinese desert-loess transition zone over the last 20 000 years. / Zhou, W. J.; Dodson, J.; Head, M. J.; Li, B. S.; Hou, Y. J.; Lu, X. F.; Donahue, D. J.; Jull, A.J. Timothy.

In: Holocene, Vol. 12, No. 1, 2002, p. 107-112.

Research output: Contribution to journalArticle

Zhou, WJ, Dodson, J, Head, MJ, Li, BS, Hou, YJ, Lu, XF, Donahue, DJ & Jull, AJT 2002, 'Environmental variability within the Chinese desert-loess transition zone over the last 20 000 years', Holocene, vol. 12, no. 1, pp. 107-112. https://doi.org/10.1191/0959683602hl525rr
Zhou, W. J. ; Dodson, J. ; Head, M. J. ; Li, B. S. ; Hou, Y. J. ; Lu, X. F. ; Donahue, D. J. ; Jull, A.J. Timothy. / Environmental variability within the Chinese desert-loess transition zone over the last 20 000 years. In: Holocene. 2002 ; Vol. 12, No. 1. pp. 107-112.
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