张菡,巩远发,郑昊,马振峰.江淮流域旱涝年夏季降水与东亚季风区低频OLR的变化特征.气象科学,2009,(2):165-172 Zhang Han,Gong Yuanfa,Zheng Hao,Ma Zhenfeng.Variation characteristics of OLR LFO in monsoon region of east Asia and its relationship with precipitation of Yangtze-Huathe River.Journal of the Meteorological Sciences,2009,(2):165-172
江淮流域旱涝年夏季降水与东亚季风区低频OLR的变化特征
Variation characteristics of OLR LFO in monsoon region of east Asia and its relationship with precipitation of Yangtze-Huathe River
投稿时间:2007-11-01  
DOI:10.3969/2012jms.00**
中文关键词:  OLR分布特征  江淮流域旱涝  低频振荡
英文关键词:Characteristics of OLR distribution,Drought/flood of Yangtze-Huaihe River,Low-frequency oscillation
基金项目:国家重点基础研究发展规划(973计划),国家自然科学基金?
作者单位
张菡 四川省气象局气候中心成都 610071 成都信息工程学院 大气科学系,成都 610041 
巩远发 成都信息工程学院 大气科学系,成都 610041 南京信息工程大学 大气科学学院南京210044 
郑昊 四川省气象局气候中心成都 610071 
马振峰 四川省气象局气候中心成都 610071 
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全文下载次数: 2011
中文摘要:
      用美国NOAA卫星提供的1974-2004年逐日OLR资料,选取江淮流域典型旱涝年进行合成分析,再利用Butterworth带通滤波器进行滤波,分别得到旱涝年30~60 d的OLR低频分量,并分析了旱涝年夏季OLR及其低频振荡分布特征与传播差异,最后研究了夏季青藏高原南侧与华北地区OLR低频变化与江淮降水的关系,结果表明:旱涝年夏季东亚地区OLR低频分量的经纬向传播差异是造成江淮地区夏季旱涝的原因之一;典型旱年江淮流域降水与青藏高原南侧逐候的OLR低频分量显著正相关,而在典型涝年则是负相关;华北地区存在负(正)OLR低频分量可能导致滞后其20 d的江淮流域降水偏少(多).
英文摘要:
      By using the CAC daily outgoing long wave radiation(OLR) data, the representative droughts and floods are chosen, and 30—60 day low-frequency oscillation(LFO) of OLR is found by the band-pass filter. Then the different distribution characteristics and propagation of the OLR and OLR-LFO in summer are analyzed. Finally, the relationship between the OLR-LFO in Southern Tibetan Plateau,north China and the rainfall in Yangtze and Huaihe River area are studied. The results show that: in drought years OLR as well as OLR-LFO is remarkably different compared to the cases in flood years, and the different precipitation may be caused by the different meridional and zonal-travelling of the OLR-LFO; there is close positive correlation between the Southern Tibetan Plateau and the rainfall in representative drought years, however it is negative in flood years; positive/negative OLR-LFO of north China can lead to the twenty days lagged abnormal drought/flood in the Yangtze and Huaihe River.
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