地理科学

地理科学 ›› 1998, Vol. 18 ›› Issue (2): 135-138.doi: 10.13249/j.cnki.sgs.1998.02.135

• 论文 • 上一篇    下一篇

江汉平原长湖近代沉积物磁性测量及其气候意义

杨汉东1, 何报寅1, 蔡述明1, Frank Oldfield2, 周新宇1, Neil Rose 3   

  1. 1. 中国科学院测量与地球物理研究所 武汉 430077;
    2. Department of Geography, University of Liverpool, Liverpool L69 3BX, UK;
    3. Environmental Change Research Centre, University College London, London WC1H 0AP, UK
  • 收稿日期:1996-03-05 修回日期:1996-07-23 出版日期:1998-03-20 发布日期:1998-03-20
  • 基金资助:
    国家自然科学基金(49070060号);中国科学院和英国皇家学会资助

MAGNETIC MEASUREMENTS OF RECENT SEDIMENTS IN LAKE CHANGHU OF THE JIANGHAN PLAIN AND THEIR CLIMATIC IMPLICATIONS

Yang Handong1, He Baoyin1, Cai Shuming1, Frank Oldfield2, Zhouxinyu1, Neil Rose3   

  1. 1. Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077;
    2. Department of Geography, University of Liverpool, Liverpool L69 3BX, UK;
    3. Environmental Change Research Centre, University College London, London WC1H 0AP, UK
  • Received:1996-03-05 Revised:1996-07-23 Online:1998-03-20 Published:1998-03-20

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摘要： 根据1992年长湖所取代表性92-5剖面沉积物磁性测量结果并结合化学分析和孢粉分析,研究了长湖近代沉积物磁性参数变化与气候变化的关系,指出该地区最近400a来气候变化总趋势是一个由冷变暖的过程。

Abstract: A research on magnetic measurements has been done on the sediments of core 92-5, which was taken in 1992 and was representative of environment changes in Lake Changhu in the Jianghan Plain, the core can be divided into 4 sediments on the parameters of the magnetic measurements: 1. Zone A (144-140cm in depth, before 1581 A.D.), each magnetic parameter is obviously small, the concentrations of magnetic minerals are low. 2. Zone B (140-74cm in depth, 1581 A.D.-1774 A.D.), each magnetic parameter changes slowly under the fundamental steady prerequisite. 3. Zone C (74-10cm in depth, 1774 A.D.-1964 A.D.), the magnetic parameters are relatively high, the undulations of the magnetic parameters are slightly more. 4. Zone D (10-0cm in depth, 1964 A.D.-1992 A.D.), owing to the growth of aquatic plants and human activities, changes of magneticparameters are complex. The concentration of component of the magnetic minerals in the sediment is high, if the temperature is high and/or the precipitation is large. The magnetic parameters corresponds to hot or cold climate. The magnetic parameters of core 92-5 show that the tendecy of the climatic changes is from cold to warm in the Jianghan Plain in recent 400 years. This is consistent with the historic records and sporo pollen analysis.

中图分类号: 

  • P318.4