The Dry Holocene Megathermal in Inner Mongolia

Chen, Chen‐Tung Arthur; Lan, Hsin-Chi; Lou, Jie-Chung; Chen, Yan-Cheng

doi:10.1016/s0031-0182(03)00225-6

Cited by 160 publications

(117 citation statements)

References 67 publications

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“…These evidences suggested that the climate had arid-cold prone characteristics. Contemporarily, climatic change in the Mu Us Desert had similar characteristics [22] , arid event occurred all over the Inner Mongolia region [27] ; the southwest monsoon weakened steadily [25] . Correlatively, the Indian monsoon weakened all of a sudden at about 4.3 kaBP [23] ; consequently, the lakes in Thar Desert rapidly shrank since 4200 BC, and entirely dried up till 3500 BC [26] .…”

Section: Resultsmentioning

confidence: 99%

Holocene climatic change in Hunshandake Desert

Jin¹

2004

Chinese Sci Bull

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Research on the geological data of Hunshandake Desert in China monsoon region revealed that Holocene summer monsoon had experienced six prevailing periods and seven weakening periods. The climatic humidity and the vegetation had also undergone the similar periodical variation influenced by the monsoon periodicity. The period when summer monsoon prevailed or winter monsoon weakened and climatic humidity and vegetation coverage relatively increased, corresponded to the global warming events; whereas the period when summer monsoon weakened or winter monsoon prevailed and climatic humidity and vegetation coverage relatively decreased, corresponded to the arid events in middle to low latitudes and the cold events in North Atlantic. As for the changing regularity of summer monsoon intensity there were two distinct periodicities of 1456 years and 494 years, also these two periodicities had global significance.

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Section: Resultsmentioning

confidence: 99%

Holocene climatic change in Hunshandake Desert

Jin¹

2004

Chinese Sci Bull

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“…[3] Previous studies have shown that a dry climate followed early Holocene humid conditions in northern China [e.g., An et al, 2000;Zhou et al, 2001Zhou et al, , 2002C.-T. A. Chen et al, 2003;Jiang et al, 2006]. However, the initiation of mid-Holocene drying varies between sites in northern China, starting between 9000 and 4000 years ago [e.g., An et al, 1993;Chen et al, 1999;Zhou et al, 2001Zhou et al, , 2002Liu et al, 2002;Shi et al, 2002;C.-T. A. Chen et al, 2003;F.-H. Chen et al, 2003;An et al, 2003;Li et al, 2003;He et al, 2004;Jiang et al, 2006].…”

Section: Introductionmentioning

confidence: 99%

Timing and spatial distribution of mid‐Holocene drying over northern China: Response to a southeastward retreat of the East Asian Monsoon

Jiang

Liu

2007

J. Geophys. Res.

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[1] To determine the timing and spatial distribution of mid-Holocene drying over northern China, the mineralogical and oxygen isotopic composition of authigenic carbonate from a closed lake at Bayanchagan, southern Inner Mongolia, were measured. Further analysis and synthesis of the spatial geological data were performed. Results from Lake Bayanchagan show a significant drying at 6000 calendar years (cal years) B.P., indicated by dolomite precipitation and a striking rise in d 18 O values. The synthesis of spatial data reveals a zonal distribution for timing of drying over northern China in the mid-Holocene, which began at 9000-7000 cal years B.P. in deserts of north-central China. At 7000-5500 cal years B.P., drying extended into the desert-steppe transitional zone and at $4500 cal years B.P. into northeastern and south-central China. This pattern indicates that the east Asian summer monsoon has significantly retreated southeastward since the mid-Holocene, which may be related to orbitally induced Northern Hemisphere insolation changes. A retreat of $400-550 km is inferred for the front of the summer monsoon from 6500 to 4500 cal years B.P.

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“…However, this is not true at a higher temporal resolution in a short period such as the Holocene. Although abrupt climatic changes happened in the region during the epoch [e.g., Xiao et al, 2002;Fowell et al, 2003;Chen et al, 2003], they were much less dramatic than during the glacial-interglacial transitions, and most of all, the regime of the combination in climatic parameters was not collapsed and have kept relatively constant throughout the whole period. The spatial movement of the dry region and the vegetation zones in it as well as of the relative distribution of C3 and C4 plants have happened on a background similar to that of nowadays.…”

mentioning

confidence: 99%

Carbon isotope of bulk organic matter: A proxy for precipitation in the arid and semiarid central East Asia

Lee

Zhang

Guo

et al. 2005

Global Biogeochemical Cycles

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Carbon isotope composition (δ13C) of bulk organic matter in soil and lake sediment sequences has been widely used to infer past climate changes. The specific climatic representation of the isotopic signature, however, lacks for examination. With excellent gradients of temperature and precipitation, as well as the gradients of vegetation zone, central East Asia provides an ideal background for developing the relationship between the δ13C and the climatic parameters. Analysis of surface soil organic matter from a transect that crosses the various climatic and vegetation zones reveals a significant linear correlation between δ13C and the mean precipitation from May to September yet a very poor relationship between δ13C and temperature. The close correlation between the δ13C and the precipitation is also corroborated by measurement of some C3 shrubs along the transect. Precipitation in the arid central East Asia is a key factor controlling the relative competition or the distribution of plant species with different photosynthetic pathways, thus the carbon isotope signature in the bulk organic matter. Its variation, therefore, can be recovered by measurement of δ13C in soils or lake sediment sequences with terrestrial organic matters.

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The Dry Holocene Megathermal in Inner Mongolia

Cited by 160 publications

References 67 publications

Holocene climatic change in Hunshandake Desert

Holocene climatic change in Hunshandake Desert

Timing and spatial distribution of mid‐Holocene drying over northern China: Response to a southeastward retreat of the East Asian Monsoon

Carbon isotope of bulk organic matter: A proxy for precipitation in the arid and semiarid central East Asia

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