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| 近44年青海东部农业区夏季降水变化特征及突变分析 | |
| 引用本文： | 刘彩红,余锦华,王黎俊. 近44年青海东部农业区夏季降水变化特征及突变分析[J]. 安徽农业科学, 2007, 35(21): 6536-6538 |
| 作者姓名： | 刘彩红 余锦华 王黎俊 |
| 作者单位： | 1. 南京信息工程大学江苏省气象灾害和环境变化重点实验室,江苏南京,210044;青海省气象局,青海西宁,810001 2. 南京信息工程大学江苏省气象灾害和环境变化重点实验室,江苏南京,210044 3. 青海省气象局,青海西宁,810001 |
| 摘 要： | 利用青海东部地区12个台站1961~2004年的气象资料,分析了近44年来的降水变化时空分布特征、变化趋势及突变。结果表明:青海东部农业区夏季降水量的总趋势呈水平,降水量无显著变化;对于10年及以上相对较大的时间尺度,17年左右的振荡周期较为明显;而对于10年以下相对较小的时间尺度,8~10年的周期突出;近44年东部夏季降水存在两次突变,分别发生在1970年,降水有弱回升趋势;1999年左右突变,降水有较弱的下降趋势。 |
| 关 键 词： | 夏季降水 区域特征 突变 |
| 文章编号： | 0517-6611（2007）21-06536-03 |
| 修稿时间： | 2007-04-01 |
Analysis of the Precipitation Variation Characteristics and its Abrupt Change in Eastern Qinghai |
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| LIU Cai-hong et al. Analysis of the Precipitation Variation Characteristics and its Abrupt Change in Eastern Qinghai[J]. Journal of Anhui Agricultural Sciences, 2007, 35(21): 6536-6538 | |
| Authors: | LIU Cai-hong et al |
| Affiliation: | Jiangsu Province key Laboratory of Meteorological Disaster and Environmental Variation in Nanjing University of Information Science and Technology; Nanjing; Jiangsu 210044 |
| Abstract: | Monthly precipitation data of 12 stations in eastern Qinghai from 1961 to 2004 were analyzed.The results indicated that the trend of summer precipitation was invariable change.There was relevant variation of summer precipitation in time in 10 years' period or less and the period of 8-10 years was very significant.From the large time scale of equal to or more than 10 years,the period of 17 years was very clear.The abrupt change was detected in eastern Qinghai in 1970 and 1999 separately. |
| Keywords: | Summer precipitation Characteristic Abrupt change |
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