摘要
利用203个测站1961～2005年4～10月逐候降水量资料，分析了东北地区雨季降水集中度和集中期时空分布特征及其变化规律。结果表明，东北雨季东部降水较西部更为集中，与年暴雨日数有很好的相关关系，降雨集中期在7月中旬到8月上旬；东北4个区雨季降水在20世纪60年代有不集中的趋势，而后呈集中趋势，到20世纪90年代后期以来变化趋势不明显，这种变化趋势可能与大气系统的强弱变化有关。东北地区的中部区、南部区、西北区雨季降水集中期均经历了趋晚、趋早、趋晚、趋势不明显4个阶段，东部区经历了平稳阶段、趋早、趋晚、趋早4个阶段。各个区转折时间不尽相同。
Based on the precipitation data from 203 survey stations from April to October during 1961 - 2005, the precipitation concentration degree and the centralism time space and time distribution characteristic and the change rule in rainy season in Northeast China were analyzed. The results showed that the eastern part of the rainy season precipitation in the Northeast was more concentrated than the western region, with the number of days of rain in a very good correlation between the concentration of rainfall in mid-July and early August. Four areas during the rainy season precipitation in the Northeast in the 1960s the trend had not focused on, and then was focused on the trend since the late 1990s the trend was not obvious that this trend might be related to atmospheric changes in the strength of the system. The concentrated period of rainfall in the central district, southern district, northwest district of Northeast China during the rainy season all experienced four phases of late, early, late, unobvious trend. The eastern district experienced four stages of smooth phase, early, late, early. The turning time in each district was different.
出处
《安徽农业科学》
CAS
北大核心
2010年第2期806-811,共6页
Journal of Anhui Agricultural Sciences
关键词
东北
降水集中度
降水集中期
大气环流
Northeast China
Precipitation concentration degree
Concentrated period of precipitation
Atmospheric circulation
