安徽农业科学Issue(30)：14873-14875,3.
近60年西南地区降水异常的气候特征分析
Analysis on Climatic Characteristics of the Precipitation Anomaly in Southwest China in Recent 60 Years
摘要
Abstract
[Objective] The research aimeil to analyze temporal-spatial distribution characteristics of the precipitation anomaly in southwest China from 1951 to 2010. [ Method] Based on monthly precipitation data of 44 stations in southwest China and 160 stations in China from 1951 lo 2010, by using EOF analysis, wavelet analysis and composite analysis, monthly and seasonal change rules of the precipitation in southwest China were analyzed. Corresponding spatial-temporal distribution characteristics of the precipitation in drought and flood years were studied. Temporal-spatial distribution characteristics of the precipitation anomaly in southwest China in recent 60 years were revealed. [ Result] Seasonal distribution of the precipitation in southwest China was uneven and was typical single-peak type. Precipitation concentrated from May to September, and peak appeared in July. In recent years, rainfall in autumn significantly became less, while that in other seasons had no obvious change. Precipitation in summer had the cycle of 14 years, another for 6 years and 3-4 years of periodic oscillations. In wet years, precipitation in southwest China had same phase with that in southern China, and anti-phase with that in the junction of Qinghai, Gansu, Xinjiang and Xizang. In dry years, precipitation in southwest China had same phase with that in the eastern part of northwest China and northern China. [Conclusion] The research provided reference basis for prediction and warning of the precipitation in the zone.关键词
西南地区/降水异常/气候特征Key words
Southwest China/ Precipitation anomaly/ Climate characteristics分类
农业科技引用本文复制引用
张荣,庞晶,覃军..近60年西南地区降水异常的气候特征分析[J].安徽农业科学,2012,(30):14873-14875,3.
