Holocene climate changes in the monsoon/arid transition reflected by carbon concentration in Daihai Lake of Inner Mongolia

Holocene - Tập 16 Số 4 - Trang 551-560 - 2006
Jinchong Xiao1, Jintao Wu2, Bin Si2, Wendong Liang1, Toshio Nakamura3, Baolin Liu4, Yoshio Inouchi5
1Institute of Geology and Geophysics, Chinese Academy of Sciences, P.0. Box 9825, Beijing 100029, China;
2CAS - Institute of Geology and Geophysics
3Center for Chronological Research, Nagoya University, Nagoya 464-8602, Japan
4National Laboratory on Scientific Drilling, China University of Geosciences, Beijing 100083, China
5Department of Earth Sciences, Faculty of Science, Ehime University, Matsuyama 790-8577, Japan

Tóm tắt

Two sediment cores recovered in the central part of Daihai Lake in north-central China were analysed at 2-to 4-cm intervals for total inorganic and organic carbon (TIC and TOC) concentrations. The TIC concentration is inferred to reflect temperatures over the lake region and an increase in the TIC concentration implies an increase in the temperature. TOC concentration is considered to reflect the precipitation in the lake basin and higher TOC concentrations denote more precipitations. Thus AMS 14C time series of the TIC and TOC records of Daihai Lake sediments uncovers a detailed history of changes in temperature and precipitation in north-central China during the last c. 12 000 yr. The Holocene, an epoch of postglacial warmth, started c. 11 500 cal. yr BP, and can be subdivided into three stages: the early (c. 11 500-8100 cal. yr BP), middle (c. 8100-3300 cal. yr BP) and the late Holocene (c. 3300-0 cal. yr BP). The climate was warm and dry during the early Holocene, warm and wet during the middle Holocene, and in the late Holocene became cooler and drier but displayed a relatively warmer and wetter interval between c. 1700 and 1300 cal. yr BP. The Holocene Climatic Optimum, defined as a postglacial episode of both megathermal and megahumid climate, might have occurred in north-central China between c. 8100 and 3300 cal. yr BP, and the climate during this period was variable and punctuated by cool and/or dry events. We infer that changes in the temperature were directly controlled by changes in summer solar radiation in the Northern Hemisphere resulting from progressive changes in the Earth's orbital parameters. Whereas an increase in the monsoonal precipitation could be closely related to an increase in the sea surface temperature of the low-latitude Pacific Ocean, an increase in the temperature and size of the Western Pacific Warm Pool and a westward shifted and strengthened Kuroshio Current in the western Pacific.

Từ khóa


Tài liệu tham khảo

An, Z.S., 1990, Loess, Quaternary geology and global change, 1

An, Z.S., 1993, Chinese Science Bulletin, 38, 1302, 10.1360/csb1993-38-14-1302

10.1016/S0277-3791(99)00031-1

Bates, R.L. and Jackson, J.A. , editors 1987: Glossary of geology. American Geological Institute , 788-788 pp.

Chen, F.H., 1991, Scientia Geographica Sinica, 11, 76

Chinese Academy of Sciences (Compilatory Commission of Physical Geography of China) 1984: Physical geography of China. climate. Science Press, 1-30 (in Chinese).

10.1126/science.241.4869.1043

Cui, Z.J., 1992, Journal of Glaciology and Geocryology, 14, 325

Du, N.Q., 1989, Acta Botanica Sinica, 31, 803

10.1177/095968369300300210

10.1016/0277-3791(93)90026-I

Gao, Y.X., 1962, Some questions about the East Asian Monsoon, 1

10.1038/353742a0

Geng, K., 1988, Journal of Beijing Normal University (Natural Science), 4, 94

Gu, Z.Y., 1993, Chinese Science Bulletin, 38, 61, 10.1360/csb1993-38-1-61

10.1016/0031-0182(70)90097-0

10.1007/978-3-642-69274-1

10.1126/science.194.4270.1121

Imbrie, J., 1984, Milankovitch and climate, part I, 269

Jian, Z.M., 1998, Chinese Science Bulletin, 43, 532, 10.1360/csb1998-43-5-532

10.1016/S0012-821X(00)00321-6

Kelts, K., 1989, Eclogae Geologicae Helvetiae, 82, 167

10.1017/S0033822200064973

Kong, Z.C., 1982, Acta Botanica Sinica, 24, 172

10.1038/317130a0

10.1016/S0277-3791(98)00009-2

Lerman, A. 1979: Geochemical processes: water and sediment environments. Wiley, 481-481 pp.

Li, B.Y., 1983, Quaternary geology of the Tibet, 100

Li, H.Z., 1979, Journal of Natural Science of Beijing Normal University, 1, 98

10.18307/1992.0104

Li, W.Y., 1985, Acta Botanica Sinica, 27, 640

10.1016/0031-0182(91)90041-O

Liu, J.L., 1989, Acta Palaeontologica Sinica, 28, 240

10.1016/0009-2541(94)90059-0

10.1016/S0168-583X(00)00398-0

Shi, Y.F. and Kong, Z.C. 1992: The climates and environments of Holocene megathermal in China. China Ocean Press , 213-213 pp. (in Chinese).

Shi, Y.F., 1992, Scientia Sinica B, 12, 1300

Shi, Y.F., 1993, Science in China (Series B), 23, 865

Shieh, Y.T., 1995, Acta Oceanographica Taiwanica, 34, 73

Song, C.Q., 1986, Journal of Beiing Normal University (Natural Science), 26

10.1017/S0033822200019123

Sun, J.Z., 1991, Quaternary of the Loess Plateau, 186

Sun, X.J., 1990, Loess, Quaternary geology and global change, 46

10.1016/0012-821X(92)90036-U

10.1126/science.246.4929.474

10.1016/0033-5894(87)90032-9

Wang, H.C., 1983, Geographical Research, 2, 8

Wang, S.M. , Yu, Y.S. , Wu, R.J. and Feng, M. 1990: The Daihai Lake: environment evolution and climate change. University of Science and Technology of China Press , 191-191 pp. (in Chinese).

Winkler, M.G., 1993, Global climates since the Last Glacial Maximum, 221

Xia, Y.M., 1988, Scientia Geographica Sinica, 8, 240

10.1016/j.quascirev.2004.01.005

Xu, Q.H., 1988, Acta Phytoecologica et Geobotanica Sinica, 12, 143

Zhang, J.C. and Lin, Z.G. 1992: Climate of China. Wiley, 376-376 pp.

Zhang, P.X., 1989, Quaternary Sciences, 1, 66

Zhang, Y.T., 1937, Geological Review, 2, 263

Zhang, Z.B., 1981, Scientia Geologica Sinica, 3, 259

Zhou, K.S., 1984, Quaternary pollen analyses and paleoenvironments, 25

Zhu, K.Z., 1973, Scientia Sinica, 2, 168

Thông tin
Thông tin xuất bản

Holocene

Tập 16 Số 4

551-560

Thông tin tác giả