高坤,张大林. 1994. 非绝热物理过程在模拟飑线系统中β尺度结构中的作用[J]. 气象学报, 52(3):321-331, doi:10.11676/qxxb1994.040
非绝热物理过程在模拟飑线系统中β尺度结构中的作用
THE EFFECTS OF DIABATIC PHYSICAL PROCESSES ON THE SIMULATION OF MESO-β SCALE STRUCTURE OF A SQUALL LINE SYSTEM
投稿时间:1991-09-04  修订日期:1992-04-23
DOI:10.11676/qxxb1994.040
中文关键词:  非绝热物理过程  β尺度结构  飑线  模拟
英文关键词:Diabatic physical processes  Meso-β scale structure  Squall line  Simulation
基金项目:
作者单位
高坤 杭州大学地理系, 杭州, 310028 
张大林 加拿大McGill大学气象系 
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中文摘要:
      利用经改进的中尺度模式,对一次飑线过程进行了多种对流参数化和显式水汽方案及地面加热过程的敏感性试验,结果表明中尺度对流性天气系统的成功预报,不仅取决于次网格尺度对流,而且取决于可分辨尺度相变过程及地面加热引起的边界层日变化。计入湿下沉的Fritsch-Chappell对流参数化方案和计入可分辨尺度凝结蒸发冻结融化等相变过程的预诊性显式方案的结合使用,对于真实模拟飑线等中尺度对流系统和减少或消除与中尺度涡旋及其降水过度加强相联系的类CISK不稳定是十分必要和有效的。
英文摘要:
      The effects of different convective parameterization, explicit moisture schemes and surface heating on the simulation of the meso-β scale structure of a squall line system are investigated using an improved meso-scale model. It is found that the successful prediction of meso-scale convective systems hinges upon not only the sub-grid scale convection, but also the resolvable scale phase change processes and the diurnal variation in the boundary layer. The simultaneous operation of the Fritsch-Chappell convective scheme with parameterized mois downdrafts and the prognostic equations for cloud water (ice) and rainwater (snow) seems to be essential in simulation realisticly MCSs and reducing or eliminating the unrealistic development of the CISK-like instability associated with the squall line system.
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