| 江汉平原长湖近代沉积物磁性测量及其气候意义 |
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| 引用本文： | 杨汉东 Oldfi.,F.江汉平原长湖近代沉积物磁性测量及其气候意义[J].地理科学,1998,18(2):135-138. |
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| 作者姓名： | 杨汉东 Oldfi. F |
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| 作者单位： | 中国科学院测量与地球物理研究所 |
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| 基金项目： | 国家自然科学基金,中国科学院和英国皇家学会资助 |
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| 摘 要： | 根据１９９２年长湖所取代表性９２－５ 面沉积物磁性测量结果并结合化学分析和孢粉分析，研究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。
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| 关 键 词： | 湖泊 沉积物 磁性测量 气候变化 江汉平原 |
MAGNETIC MEASUREMENTS OF RECENT SEDIMENTS IN LAKE CHANGHU OF THE JIANGHAN PLAIN AND THEIR CLIMATIC IMPLICATIONS |
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| Yang Handong,He Baoyin,Cai Shuming,Frank Oldfield,Zhouxinyu,Neil Rose.MAGNETIC MEASUREMENTS OF RECENT SEDIMENTS IN LAKE CHANGHU OF THE JIANGHAN PLAIN AND THEIR CLIMATIC IMPLICATIONS[J].Scientia Geographica Sinica,1998,18(2):135-138. |
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| Authors: | Yang Handong He Baoyin Cai Shuming Frank Oldfield Zhouxinyu Neil Rose |
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| Institution: | Yang Handong 1 He Baoyin 1 Cai Shuming 1 Frank Oldfield 2 Zhouxinyu 1 Neil Rose 3 1 |
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| 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. |
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| Keywords: | Lake sediment Magnetic measurements Climatic change |
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