| 东亚土地覆盖动态与季风气侯年际变化的关系 |
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| 引用本文： | 香宝,刘纪远.东亚土地覆盖动态与季风气侯年际变化的关系[J].地理学报,2002,12(1):42-48. |
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| 作者姓名： | 香宝 刘纪远 |
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| 作者单位： | 中国科学院地理科学与资源研究所 北京100101
(香宝)，中国科学院地理科学与资源研究所 北京100101(刘纪远) |
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| 基金项目： | 中国科学院资源环境领域知识创新工程方向性重大项目（KZCX2－308），内蒙古自治区自然科学基金项目（20010905－14） |
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| 摘 要： | 以东亚地区 １９８２～１９８９年时间序列降水资料及 ＡＶＨＲＲ ８ ｋｍ ＮＤＶＩ数据为基本数据源，应用地理信息系统技术，分别研究了东亚地区夏季（５－９月）降水及土地覆盖的年际变化，并揭示了研究时间段内各自的变化规律。进一步用奇异值分解（ＳＶＤ）模型方法分析了以降水变化为表征的东亚地区气候年际变化与土地覆盖年际变化之间的关系。
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| 关 键 词： | 东亚 土地覆盖动态 季风气候 年际变化 奇异值分解 |
| 收稿时间： | 2001-10-20 |
| 修稿时间： | 2001-11-30 |
Relationship between land cover and monsoon interannual variations in east Asia |
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| XIANG Bao,LIU Ji-yuan.Relationship between land cover and monsoon interannual variations in east Asia[J].Acta Geographica Sinica,2002,12(1):42-48. |
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| Authors: | XIANG Bao LIU Ji-yuan |
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| Institution: | Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101,China |
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| Abstract: | Asian monsoon have multiple forms of variations such as seasonal variation, intra-seasonal variation, interannual variation, etc. The interannual variations have not only yearly variations but also variations among several years. In general, the yearly variations are described with winter temperature and summer precipitation, and the variations among several years are reflected by circulation of ENSO events. In this study, at first, we analyze the relationship between land cover and interannual monsoon variations represented by precipitation changes using Singular Value Decomposition method based on the time series precipitation data and 8km NOAA AVHRR NDVI data covering 1982 to 1993 in east Asia. Furthermore, after confirmation and reclassification of ENSO events which are recognized as the strong signal of several year monsoon variation, using the same time series NDVI data during 1982 to 1993 in east Asia, we make a Principle Component Analysis and analyzed the correlation of the 7th component eigenvectors and Southern Oscillation Index (SOI) that indicates the characteristic of ENSO events, and summed up the temporal-spatial distribution features of east Asian land cover’s inter-annual variations that are being driven by changes of ENSO events. |
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| Keywords: | East Asia land cover dynamic monsoon climate interannual changes Singular Value Decomposition(SVD) |
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