The effect of topography on quasi—geostrophic frontogenesis |
| |
Authors: | Zhao Ming |
| |
Institution: | Department of Atmospheric Sciences, Nanjing University, Nanjing |
| |
Abstract: | This paper improves Bannon’s work on the quasi-geostrophic frontogenesis in a horizontal deformation field. By setting the
lower boundary condition for the equation of potential temperature on the realistic topography instead of on z = 0, a general
solution for the temperature field is derived after applying conformai mapping to the equation for the potential temperature,
the vertical velocity and divergence field are also calculated. The general characteristics for the frontogenetic process
still are frontolytic for warm front and frontogenetic for cold front in downstream of a mountain and the reverse is true
upstream of a mountain, but more fine spatial structure of the temperature field and frontogenetic characteristics than Bannon’s
are obtained near surface because of the treatment of lower boundary condition. It is concluded that the frontogenetic characteristics
are related to the translating speed of the deformation field with respect to the topography.
This work was supported by the National Natural Science Foundation of China. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
| 点击此处可从《大气科学进展》浏览原始摘要信息 |
| 点击此处可从《大气科学进展》下载免费的PDF全文 |
|