检索结果-南通市图书馆

Evolution mechanisms of the intraseasonal oscillation associated with the Yangtze River Basin flood in 1998

Science China Earth Sciences 2005年第7期48卷 957-967页

作者： chen guixing li weibiao yuan zhuojian wen zhiping Department of Atmospheric Science/Center of Monsoon and Environment Sun Yat-Sen University Guangzhou 510275 China Department of Atmospheric Science/Center of Monsoon and Environment Sun Yat-Sen University Guangzhou 510275 China Department of Atmospheric Science/Center of Monsoon and Environment Sun Yat-Sen University Guangzhou 510275 China Department of Atmospheric Science/Center of Monsoon and Environment Sun Yat-Sen University Guangzhou 510275 China

With 1998 NCEP reanalysis data and the linear diagnostic equation for local me- ridional circulation, four main processes and the boundary effects with relatively large contribu- tions to the intraseasonal oscillation of the vertical branches of the East Asian meridional circula- tion are quantitatively identified among all the processes involved in the quasi-primitive equations used in the derivation of the linear diagnostic equation. The numerical results show that the main processes with maximal contributions in the lower latitudes include the latent heating and vertical transports of sensible heat. These processes are mainly associated with the tropical convective activities and result in the low-frequency cyclones in the lower latitudes. The main processes with maximal contributions in the higher latitudes are the horizontal transports of westerly momentum and horizontal temperature advections. These processes are mainly associated with the fluctua- tions in the westerlies and result in the low-frequency cyclones in the higher latitudes. The low-frequency cyclones propagating away from lower latitudes not only interact with those from higher latitudes to enhance the lifting of the moist air in the Yangtze River Basin (YRB), but also leave room for the development of the low-frequency anticyclones over the South China Sea (SCS). The southwesterly in the northwestern quadrant of the SCS anticyclones provides the YRB with abundant moisture. This favorable moisture condition along with the enhanced rising motion in the YRB leads to the extraordinary flood in 1998.

关键词： intraseasonal oscillation convective activities low-frequency circulation flood.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

作者

语言

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

作者

语言

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：