| 沔阳地区一万多年来孢粉记录的环境演变 |
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| 引用本文： | 羊向东,朱育新,蒋雪中,吴艳宏,王苏民.沔阳地区一万多年来孢粉记录的环境演变[J].湖泊科学,1998,10(2):23-29. |
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| 作者姓名： | 羊向东 朱育新 蒋雪中 吴艳宏 王苏民 |
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| 作者单位： | 中国科学院南京地理与湖泊研究所湖泊沉积与环境开放实验室!南京210008，中国科学院南京地理与湖泊研究所湖泊沉积与环境开放实验室!南京210008，中国科学院南京地理与湖泊研究所湖泊沉积与环境开放实验室!南京210008，中国科学院南京地理与湖泊研究所湖泊沉积与环境开放实验室!南 |
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| 基金项目： | 中国科学院重点项目!Z－001 |
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| 摘 要： | 依据Ｍ１孔孢粉组合特征及＾１４Ｃ年龄数据，结合孢粉数理统计分析，重建了江汉平原沔阳地区一万多年来的古季风气候变迁序列。研究结果表明，该区气候经历了六个阶段的变化。６．７－４．４ｋａＢＰ间。为水热配置最佳时期。夏季降水显著增多；３．９－１２．７ｋａＢＰ，气温有所下降，但有效湿度很高，为古云楚泽扩张时期，其湿度的增加既受锋面降水带的影响，同时恙长江南移，河床迅速抬高有关。约６ｋａＢＰ后，人类活动在本区
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| 关 键 词： | 古环境 环境演变 孢粉记录 沔阳地区 古气候 |
| 收稿时间： | 1/4/1998 12:00:00 AM |
Environmental Changes from Spore-Pollen Record of Mianyang Region over the Past 10000 Years |
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| Yang Xiangdong,Zhu Yuxin,Jiang Xuezhong,Wu Yanhong and Wang Sumin.Environmental Changes from Spore-Pollen Record of Mianyang Region over the Past 10000 Years[J].Journal of Lake Science,1998,10(2):23-29. |
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| Authors: | Yang Xiangdong Zhu Yuxin Jiang Xuezhong Wu Yanhong and Wang Sumin |
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| Institution: | Lake Sedimentation and Envionment Lab., Nanjing Institute of Geogrtphy and Limnology, CAS. Nanjing 210008,Lake Sedimentation and Envionment Lab., Nanjing Institute of Geogrtphy and Limnology, CAS. Nanjing 210008,Lake Sedimentation and Envionment Lab., Nanjing Institute of Geogrtphy and Limnology, CAS. Nanjing 210008,Lake Sedimentation and Envionment Lab., Nanjing Institute of Geogrtphy and Limnology, CAS. Nanjing 210008 and Lake Sedimentation and Envionment Lab., Nanjing Institute of Geogrtphy and Limnology, CAS. Nanjing 210008 |
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| Abstract: | According to the analyses of spore-pollen assemblages, 14 C data, and numerical method, the palaeomonsoon climatic changes in Mianyang region, Jianghan plain. have been reconstructed in the past 10000 years. The result indicates that climate has undergone changes of six stages in this region. During 6. 5 - 4. 4kaBP, the climate came up to its optimum combination between heating and moisture, and the summer rainfall area caused more precipitation to is region. About 3. 9 - 1. 7kaBP, there was a rapid drop in the temperature, but the higher effective humidity corresponding to the expansion of great lake of Yunmentze was reflected by both rainfall area and the movement of the Yangtze River from north to south. After 6kaBP, human activity occurred in this reglon, undergoing the nature developing process from depending on the nature environment in the early period. to adapting to the environment after 3. 5kaBP, and to changing environment after 9. 7kaBP. |
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| Keywords: | M1 core pollen assemblages Principal Components Analysis palaeomonsoon climate the intensity of human activities |
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