摘要
[目的]揭示中国东南沿海地区降水集中度（PCD）和集中期（PCP）时空变化特征,为科学应对旱涝灾害和水资源利用等提供依据。[方法]基于东南沿海地区46个气象台站的逐日降水量资料,采用Morlet小波分析、EOF等气候分析方法对1960—2013年东南沿海降水集中度和集中期时空变化特征进行分析。[结果]在时间变化上,PCD波动幅度介于0.10~0.25,存在13~16a,19~23a和33~35a的周期变化;PCP波动幅度介于139.5~208.2,存在13~16a和25~30a的周期变化。在空间变化上,PCD具有明显的地域分异特征,PCP空间差异性大。[结论]1960—2013年中国东南沿海地区降水集中度在增强,且沿海地区值大于内陆地区;降水集中期稳定波动,空间上变化具有一致性。
[Objective]The spatial-temporal variation characteristics of precipitation concentration degree（PCD）and precipitation concentration period（PCP）on the southeast coast of China were studied to provide bases for dealing with drought and flood disasters as well as water resources utilization scientifically.[Methods]Based on daily precipitation data from 46 meteorological stations during 1960—2013on the southeast coast of China,the authors investigated the characteristics of PCD and PCP using wavelet analysis and Empirical Orthogonal Function（EOF）methods.[Results]Fluctuating range of PCD was between 0.10 and 0.25;PCD had three cycles：13~16a,19~23aand 33~35a.PCP ranged between 139.5and 208.2and it had two cycles：13~16aand 25~30a.An obvious characteristic of PCD was regional differentiation.Spatial variation of PCP was notable.[Conclusion]During 1960—2013in the southeast coast area of China,PCD increased,and the values of PCD of coastal areas were higher than those of inland areas.PCP fluctuated steadily.
出处
《水土保持通报》
CSCD
2016年第2期277-282,287,共7页
Bulletin of Soil and Water Conservation
基金
国家社会科学基金重点项目"西部重大灾害时空规律的统计研究"(14AZD094)
国家社会科学基金项目"中国丝绸之路经济带生态文明建设评价与路径研究"(14XKS019)
关键词
降水集中度(PCD)
降水集中期(PCP)
时空特征
东南沿海
precipitation concentration degree（PCD）
precipitation concentration period（PCP）
spatial-temporal variation
southeast coast of China
