摘要
本文提出一种利用实测风场、高度场、温度场和地面三小时气压变化资料,考虑风场和质量场之间基本满足准地转平衡关系,大气具有准无辐散性,但又保留一部分与地面气压变化相应散度的地转偏差,将以实测的等压面风场插到σ坐标的风场进行订正的初值化方法,并用一个单时资料进行初步试验.文中还对风场初值化问题进行了讨论.
A new approach for wind initialization using the observed wind, geopotential height, temperature and surface pressure change fields is presented in this paper, in which not only the qua-si-geostrophic equilibrium between wind and pressure fields is essentially taken into account; but also certain geostrophic deviation associated with the surface pressure change is retained. It also takes into account the quasi-nondivergence of the atmosphere and revises the winds in crcoordinates interpolated from the observed winds in p-coordinates. A preliminary test was conducted with a set of real-time data for verifying this technique. Some aspects of wind initialization were also discussed .
出处
《大气科学》
CSCD
北大核心
1992年第3期302-312,共11页
Chinese Journal of Atmospheric Sciences
基金
国家"七五"科技攻关项目"中期数值天气预报研究"的子课题
关键词
数值预报
风场
初值化
Wind field
Initialization
Numerical weather prediction .
