摘要
利用１９５１～１９９８ 年中国１６０ 站逐月降水和气温资料，分析了长江中下游降水异常的基本特征，并着重分析了它与全国其他地区降水和气温异常的关系。结果表明：长江中下游降水异常有明显的季节、年际和年代际变化特征，６～７ 月降水异常程度大、频数多，以７ 月为最；在近４８ 年中，该地区的降水异常表现为３ 个明显不同的气候时段，可选出１０ 个涝年和８ 个旱年。旱、涝年降水异常合成分析的ＥＯＦ分解指出，旱涝年时全国降水异常具有不同的时空分布特征，用同样的方法还研究了旱、涝年时全国气温异常在前期和后期的不同特点。
The monthly precipitation and temperature data of 160 stations in China during 1951～1998 are used to analyze the basic properties of the precipitation anomalies in the middle lower reaches of the Yangtze River with focus on their relationships with the precipitation and temperature anomalies in China.Results indicate that there are remarkable seasonal,interannaual and interdecadal variations of the precipitation anomalies in the middle lower reaches of the Yangtze River,with the magnitude and frequency anomalies occurring in Jun. to Jul.,especially in Jul..In the recent 48 years,there are three obvious climate periods of the precipitation anomalies in the middle lower reaches of the Yangtze River,ten flood years and eight drought years can be selected.The EOF analyses of the composite precipitation anomalies in flood and drought years in the middle lower reaches of the Yangtze River show that spatial and temporal distribution properties of precipitation anomalies in China are different in drought and flood years;the different characteristics of temperature anomalies in drought and flood years in China in the prior and following month are also studied.
出处
《南京气象学院学报》
CSCD
1999年第4期685-691,共7页
Journal of Nanjing Institute of Meteorology
基金
国家自然科学基金重点项目!"中国区域气候变化分析和机理研究"(49735170)
关键词
长江中下游
降水异常
气温异常
时空分布
the middle lower reaches of the Yangtze River
precipitation anomaly
temperature anomaly
spatial and temporal distribution
