| 叶燕华,郭江勇,王风.黄土高原春季降水的气候特征分析[J].干旱地区农业研究,2004,(1):11~17 |
| 黄土高原春季降水的气候特征分析 |
| The climatic feature of spring precipitation on the Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2004.01.03 |
| 中文关键词: 黄土高原 春季降水 时空分布 |
| 英文关键词:the Loess Plateau spring precipitation spatial and temporal features |
| 基金项目:中国气象局兰州干旱气象研究所2002年启动资金"黄土高原春旱变化规律及成因"(兰干研发(2002)08号)； 中国科学院农办项目"黄土高原生态型商品畜牧业优化发展模式研究 |
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| 中文摘要: |
| 利用黄土高原56站40a的春季降水资料,用REOF方法进行了春季降水气候分区,并用EOF方法和MHF(黑西哥帽函数)小波方法分析了其时空分布特征和变化规律。结果表明:黄土高原春季降水具有明显的南北差异和东西差异,在时间分布上干旱年份与多雨年份交替出现;黄土高原春季降水可分为8个气候区,各区域代表站春季降水量主要有准7a、19a和22a的变化周期。 |
| 英文摘要: |
| Precipitation data at 56 observational stations from 1961 to 2000 are used to divide up the climate regions with REOF method, and to analyze the spatial and temporal features with the MHF wavelet analysis and EOF method. It is indicated that there exit remarkbly differences of spring precipitation among different regions on the Loess Plateau, and the wet years alternate with the drought years. The Loess Plateau can be divided into 8 climate regions in line with the spring precipitation, and there exit the periods of quasi-7 a, 19 a and 22 a for the variation of spring precipitation at the representative stations. |
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