摘要
建立了一个适用于复杂地形的冰雹云模式。模式是二维、弹性、非静力、采用地形跟随坐标、包含双变参数冰相微物理过程参数化。使用实测的初值条件和环境场进行试验。对理想对称型山地的不同初始位温扰动作模拟。结果表明 ,当初始位温扰动在迎风坡和山顶时冰雹云发展较弱 ,而当初始位温扰动在背风坡和平原时冰雹云发展较强。当初始位温扰动在背风坡时冰雹云的降雹量约为当初始位温扰动在迎风坡时冰雹云降雹量的 6倍。山地上冰雹云的发展可能主要受山地上中层扰动气流和冰雹云微物理过程相结合的影响。
A hail cloud model that is two dimensional elastic non hydrostatic, uses a terrain following coordinate system and includes double parameters for ice phase microphysics, has been developed. Numerical experiments were performed using the observed data under different domains of the initial potential temperature perturbation over symmetric mountainous terrain. The results show that the hail cloud which domain of the initial potential temperature perturbation is located inwindward slope and top of mountain is weak,but stronger in lee slope and plain. The hail fall of the hail cloud which domain of the initial potential temperature perturbation is located in lee slope is 6 times as large as in windward slope. The hail cloud over the mountainous terrain may be effected by the air flow of middle layer over the mountainous terrain and the microphysical processes of the hail cloud.
出处
《高原气象》
CSCD
北大核心
2000年第1期59-65,共7页
Plateau Meteorology
基金
国家自然科学基金!( 496 752 4 7)
LASG资助项目
关键词
山地
冰雹云
数值模拟
初始位温扰动
Mountainous terrain Numerical simulation of hail cloud Initial potential temperature perturbation
