| 1978—1994年分省农业旱灾灾情的经验正交函数EOF分析 |
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| 引用本文： | 方修琦,何英茹.1978—1994年分省农业旱灾灾情的经验正交函数EOF分析[J].自然灾害学报,1997,6(1):59-64. |
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| 作者姓名： | 方修琦 何英茹 |
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| 作者单位： | 北京师范大学资源与环境科学系 |
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| 摘 要： | 本文利用１９７８～１９９４年各省、市、自治区的农业旱灾受灾面积及播种面积的资料，以旱灾受灾率（即旱灾受灾面积与播种面积之比）作为刻划旱灾灾情的指标。对标准化的旱灾受灾率进行经验正交函数分析，发现前五个典型场方差贡献达７０．７％，可以概括我国旱灾灾情的空间分布主要类型。其中，前三个典型场的正负区域分界线的大体位置分别为长城一线、秦淮线和江南丘陵北缘
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| 关 键 词： | 农业旱灾 经验正交函数分析 中国 |
AN EOF ANALYSIS ON DROUGHT EFFECT ON AGRICULTURE IN CHINA DURING 1978-1994 |
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| Fang Xuiqi,He Yingru,Zhang Wenbo.AN EOF ANALYSIS ON DROUGHT EFFECT ON AGRICULTURE IN CHINA DURING 1978-1994[J].Journal of Natural Disasters,1997,6(1):59-64. |
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| Authors: | Fang Xuiqi He Yingru Zhang Wenbo |
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| Abstract: | The provincial data of standard ratio of drought affected area and seeded area from 1978 to 1994 is used for EOF analysis.It is found that the first five EOFs,which contribute 70 7% of the total variance,are able to represent the major characteristics of spatial distribution of drought disasters.The zero lines dividing the negative region and the positive region in EOF1,EOF2 and EOF3 approximately locate along the Great Wall,Northern boundary of Jiangnan Hills and Qingling-Huaihe,respectively. |
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| Keywords: | Agricultural drought EOF analysis China |
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