Abstract
The climate is influenced by westerlies year in year out and the aeolian loess is widespread in the Yili region, the Xinjiang Uygur Autonomous Region. Through the study of the loess section with a thickness of 21.5 m, much useful information about climatic change in this region during the last glaciation was gotten. Grain size analysis of loess samples in the section showed that the climatic change in the Yili region was of instability during the last glaciation and similar to those of the North Atlantic Ocean and Greenland. In correspondence with the Heinrich events, the percentage of the size fraction of loess with grain size less than 10 μm decreased in cold stadials in the Yili region. This result suggests that the westerly wind be strengthened during the cold periods. Compared with the stadials, the content of the loess with grain size less than 10 μm was increased in interstadials, which indicated that the strength of the westerly wind was weakened. It is obvious that the climate was instable not only in the North Atlantic Ocean and polar regions, but also in other areas of Northern Hemisphere during the last glaciation.
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References
Heinrich, H., Origin and consequences of cyclic ice rafting in the Northeast Atlantic Ocean during the past 130 000 years, Quaternary Research, 1988, 29: 142.
Dansgaard, W., Johnsen, S. J., Clausen, H. B. et al., Evidence for general instability of past climate from a 250 ka ice-core record, Nature, 1993, 364: 218.
Bond, G., Broecker, W. S., Johnsen, S. et al., Correlation between climate records from North Atlantic sediments and Greenland ice, Nature, 1993, 365: 143.
Broecker, W. S., Massive iceberg discharge as triggers for global climate change, Nature, 1994, 372: 421.
Porter, S. C., An, Z. S., Correlation between climatic events in the North Atlantic and China during the last glaciation, Nature, 1995, 375: 305.
An, Z. S., Sun, D. H., Zhang, X. Y. et al., Accumulation sequence of Chinese loess and climatic records of Greenland ice core during the past 130 ka, Chinese Science Bulletin, 1995, 40(15): 1272.
Ding, Z. L., Ren, J. Z., Liu, T. S. et al., Irregular change of monsoon-desert system on a millennial scale and its mechanism, Science in China, Ser. D (in Chinese), 1996, 26(5): 386.
Chen, F. H., Bloemendal, J., Wang, J. M. et al., High-resolution multi-proxy climate records from Chinese loess: evidence for rapid climatic changes over the last 75 kyr, Palaeogeography, Paleaoclimatology, Palaeoecology, 1997, 130(1–4): 323.
Guo, Z. T., Liu, T. S., Wu, N. Q. et al., Heinrich-rhythm pulses of climates recorded in loess of the last two glaciations, Quaternary Sciences (in Chinese), 1996, (1): 21.
Lu, H. Y., Li, L., Huang, X. P. et al., East winter monsoon oscillation and its correlation with the North Atlantic Heinrich events during the last glaciation, Progress in Natural Science, 1996, 6(6): 711.
Wu, J. L., Wang, S. M., Pan, H. X. et al., Climatic variations in the past 140 ka recorded in core RM, eastern Qinghai-Tibetan Plateau, Science in China, Ser. D, 1997, 40(4): 443.
Yao, T. D., Thompson, L. G., Shi, Y. F. et al., Climate variations since the last interglaciation in Guliya ice core, Science in China, Ser. D, 1997, 40(6): 662.
Wang, L. J., Tadamichi, O., Tele-connections between East Asia monsoon and the high-latitude climate: A comparison between the GISP2 ice core record and the high-resolution marine records from the Japan and the South China Seas, The Quaternary Research, 1998, 37(3): 211.
Yao, T. D., Abrupt climatic changes on the Tibetan Plateau during the Last Ice Age—Comparative study of the Guliya ice core with the Greenland GRIP ice core, Science in China, Ser. D, 1999, 42(4): 358.
Fang, X. M., Pan, B. T., Guan, D. H. et al., A 60 000-year loess-paleosol record of millennial-scale summer monsoon instability from Lanzhou, China, Chinese Science Bulletin, 1999, 44(24): 2264.
Larry, V. B., Steve, P. L., James, W. B. et al., Correlation of Late-Pleistocene lake-level oscillations in Mono Lake, California, with North Atlantic climatic events, Quaternary Research, 1998, 49: 1.
Karl, H. B., Bettina, G., Hans, J. W. et al., North Atlantic ice sheet fluctuations 10 000–70 000 years ago as inferred from deposits on the Reykjanes Ridge Southeast of Greenland, Quaternary Research, 1998, 49: 171.
Pye, K., Aeolian Dust and Dust Deposits, London: Academic Press, 1987, 118–128.
Ye, W., Jin, H. L., Zhao, X. Y. et al., Depositional feature and material sources of loess in the Yili region, Xinjiang, Arid Land Geography (in Chinese), 1998, 21(4): 1.
Bender, M., Sower, T., Dickson, S. et al., Climate correlation between Greenland and Antarctica during the past 100 000 years, Nature, 1994, 372: 663.
Xong, S. F., Ding, Z. L., Liu, T. S. et al., Comparison of paleoclimatic records from China loess and high latitude ice cores and tropical ocean during the last glaciation, Marine Geology & Quaternary Geology (in Chinese), 1998, 18(1): 71.
Linsly, B. K., Oxygen-isotope record of sea level and climate variations in the Sulu Sea over the past 150 000 years, Nature, 1996, 380: 234.
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Ye, W., Dong, G., Yuan, Y. et al. Climate instability in the Yili region, Xinjiang during the last glaciation. Chin.Sci.Bull. 45, 1604–1609 (2000). https://doi.org/10.1007/BF02886222
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DOI: https://doi.org/10.1007/BF02886222