摘要
利用完全弹性三维冰雹云模式,模拟研究了初始扰动对积云发生发展的影响。模拟结果表明,对流发生层结条件满足的情况下,不同初始扰动会导致云不同的发生发展。扰动中心位温偏差大小适当,仅增加扰动厚度或降低扰动中心高度均能使积云发展更快、强度更大;适当减小水平扰动半径能促使积云提前发展,但会导致对流强度减弱;而增大扰动中心位温偏差,不但能增加对流强度,还能促使积云提前发展。
A threc-dimensional hailstorm numerical model with fully elastic primitive equations is used to simulate the effects of the initial disturbance on the occurrence and development of convective clouds. The simulation results with the environmental stability starting convection show that the initial perturbation is one of the key elements that influence the development of the cumulus. And increasing the disturbance thickness or reducing the perturbation center height separately will strengthen and quicken the cumulus when the initial potential temperature deviation is adequacy; the convective will develop faster with a smaller disturbance horizontal radius, but it will be weakened under this condition; nevertheless the cumulus develops faster and more intensely with a larger disturbance potential temperature deviation.
出处
《气候与环境研究》
CSCD
北大核心
2008年第3期238-252,共15页
Climatic and Environmental Research
基金
国家自然科学基金资助项目40537034
中国科学院知识创新工程重要方向项目KZCX3-SW-225
南京信息工程大学气象灾害江苏省重点实验室课题KLME05006
关键词
初始扰动
水平扰动半径
扰动厚度
扰动中心位温偏差
扰动中心高度
initial perturbation, disturbance horizontal radius, disturbance thickness, disturbance potential tem- perature deviation, perturbation center height
