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| Titel |
East Asian Monsoon and paleoclimatic data analysis: a vegetation point of view |
| VerfasserIn |
J. Guiot, Hai Bin Wu, Wen Ying Jiang, Yun Li Luo |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 4, no. 2 ; Nr. 4, no. 2 (2008-06-26), S.137-145 |
| Datensatznummer |
250001627
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| Publikation (Nr.) |
 copernicus.org/cp-4-137-2008.pdf |
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| Zusammenfassung |
| First we review several syntheses of paleodata (pollen, lake-levels) showing
the climate variations in China and Mongolia from the last glacial maximum to
Present and in particular the precipitation increase at mid Holocene related
to enhanced monsoon. All these results concur to a much enhanced monsoon on
most of China during the first half of the Holocene. Second we present, in
some details, a temporal study of a core (Lake Bayanchagan, Inner Mongolia)
located in an arid region at the edge of the present East Asian Monsoon (EAM)
influence and then sensitive to climatic change. This study involves pollen
data together with other macro-remains and stable isotope curve to obtain a
robust climate reconstruction. This study shows a long wet period between
11 000 and 5000 years BP divided in two parts, a warmer one from 11 000 and
8000 (marked by large evapotranspiration) and a cooler one more favourable to
forest expansion. Third, we present a spatial study based on pollen data only
and covering all China and Mongolia at 6000 years BP, but using a mechanistic
modelling approach, in an inverse mode. It has the advantage to take into
account environmental context different from the present one (lower
atmospheric CO2, different seasonality). This study shows temperature
generally cooler than present one in southern China, but a significant
warming was found over Mongolia, and a slightly higher in northeast China.
Precipitation was generally higher than today in southern, northeast China,
and northern Mongolia, but lower or similar to today in northwest China and
north China. Enhanced EAM was then found in the southern half of China and in
northeast China. |
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