检索结果-南通市图书馆

Study on Two Categories of Sudden Stratospheric Warming

Acta meteorologica Sinica 2007年第4期21卷 450-464页

作者：张恒德高守亭陆维松 National Meteorological Center Institute of Atmospheric Physics Chinese Academy of Sciences Department of Atmospheric Sciences Nanjing University of Information Science & Technology

Invoking 45-yr daily European Centre for Medium-range Weather Forecasts （ECMWF） reanalysis data, firstly all the sudden stratospheric warming （SSW） events are selected in these years, which can be classified into two categories： downward-propagating event and non-downward-propagating event. And then, based on potential vorticity distribution on isentropic surfaces （IPV）, temperature field, and zonal wind field, a detailed description of the SSW occurring during the winter-spring （December and the following January, February, March） in 2000-01 and 2001-02 is given. Finally, the evolvement of polar vortex during warming process and the impact of warming on troposphere are discussed. It is found that （1） there is inter-decadal variation for stratospheric warming phenomenon; （2） the SSW event lasting from late January till early March in 2001 can propagate downward to troposphere; （3） during this SSW, there is zonal-mean easterly winds in both stratosphere and troposphere; （4） the two warming events during December 2001 and March 2002 cannot propagate downward to troposphere, while zonal easterly winds only appear in stratosphere; and （5） in the process of the two types of warming, a long and narrow high-value IPV “tongue” extends out from main polar vortex, which breaks out the gradient of IPV. Compared with the non-downward-propagating stratospheric warming case, the highest value of IPV departs farther from pole and the “tongue” is longer and narrower during the downward-propagating warming event. Pinched by anticyclone from middle latitude, the stratospheric polar vortex will displace, distort or breakdown. By contrast, the change of polar vortex is greater in the course of downward-propagating warming event. Also, troposphere circulation and polar vortex evolve in different degree, and usually both of them go with blocking, but the above evolvement in the downward-propagating warming is more distinct.

关键词： stratospheric warming downward-propagate non-downward-propagate polar vortex

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

机构

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

机构

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：