淮河流域降水过程时空特征及其对ENSO影响的响应研究

发布时间：2018-05-08 13:07

本文选题：降水过程 + ENSO事件　；参考：《地理科学》2016年01期

【摘要】：基于淮河流域35个站点1961~2008年日降水资料,从成因角度研究不同厄尔尼诺-南方涛动事件(ENSO)事件对流域降水过程时空演变特征的影响。研究表明:1流域降水过程出现沂沭泗河水系变干、淮河水系降水量缓慢增大的特征。2 CPW年,年最长连续降水日数、年最长连续降水量的距平变化幅度大且为负值;EPC年,年最长连续无降水日数较常年明显增多;EPW年,连续降水日数变长、连续降水量减少。3 ENSO对流域强降水影响较大,在CPW和EPW年淮河水系暴雨、大雨日数较常年多,而沂沭泗河水系暴雨、大雨日数比常年少;EPC年与此相反。4 ENSO对连续4 d以上降水影响显著,其中EPC年影响最大。
[Abstract]:Based on the daily precipitation data from 1961 to 2008 at 35 stations in the Huaihe River Basin, the influence of different ENSO events on the temporal and spatial evolution of precipitation process was studied from the point of view of the cause of formation. The results show that the precipitation process of the river Yishusi becomes dry, the precipitation of the Huaihe River system increases slowly. 2 CPW years, the longest continuous precipitation days and the anomaly range of the longest continuous precipitation in the year are large and negative. The number of continuous precipitation days in each year is obviously more than that in other years. The number of continuous precipitation days becomes longer, and the decrease of continuous precipitation of 3. 3 ENSO has a great influence on the heavy rainfall in the basin. In the years of CPW and EPW, the number of heavy rain days in the Huaihe River system is more than that in the normal years. However, in Yishusi River, the number of days of heavy rain is less than that of normal year. On the contrary, 4. 4 ENSO has a significant effect on precipitation over 4 days in succession, among which EPC year has the greatest effect.
【作者单位】：中山大学华南地区水循环与水安全广东省普通高校重点实验室;中山大学水资源与环境系;宿州学院地球科学与工程学院;
【基金】：国家杰出青年科学基金项目(51425903) 新疆维吾尔自治区科技计划项目(201331104) 香港特别行政区研究资助局(CUHK441313)项目中山大学滨海小流域自然地理综合过程观测与实验平台建设(2012年度)项目资助~~
【分类号】：P732;P426.6

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