| 一种新的垂直速度计算方法 |
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| 引用本文： | 赵向军,丁治英,李莹,高松.一种新的垂直速度计算方法[J].气象科学,2020,40(2):209-219. |
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| 作者姓名： | 赵向军 丁治英 李莹 高松 |
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| 作者单位： | 海洋大气科学中心/海洋科学与工程系, 南方科技大学, 广东 深圳 518071;南京信息工程大学 气象灾害省部共建教育部重点实验室, 南京 210044;南京信息工程大学 大气科学学院, 南京 210044;重庆市气象科学研究所, 重庆 401147 |
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| 基金项目： | 国家自然科学基金资助项目（41575106） |
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| 摘 要： | 在流体的不可压缩条件下,本文通过连续方程给出了一种新的垂直速度计算方法,称为z方法。通过实验得出:z方法下同样可以得出水平涡度与垂直运动的关系,即水平涡度矢量逆时针旋转时,对应上升运动,顺时针旋转时对应下沉运动。通过有效性验证得出:本文的方法在高层具有比较高的可靠性,在低层可靠性比高层稍弱,在中层则不甚理想。通过与p方法求解出的垂直速度的效果进行比较,得出p方法略好于z方法。
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| 关 键 词： | 垂直切变 水平涡度 垂直速度 连续方程 垂直切变的涡度 |
| 收稿时间： | 2018/4/7 0:00:00 |
| 修稿时间： | 2018/9/29 0:00:00 |
A novel method for calculating vertical velocity |
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| ZHAO Xiangjun,DING Zhiying,LI Ying,GAO Song.A novel method for calculating vertical velocity[J].Scientia Meteorologica Sinica,2020,40(2):209-219. |
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| Authors: | ZHAO Xiangjun DING Zhiying LI Ying GAO Song |
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| Institution: | Center for Oceanic and Atmospheric Science at Sustech(COAST)/Department of Ocean Science and Engineering, South University of Science and Technology of China, Guangdong Shenzhen 518071, China;Key Laboratory of Meteorological Disaster, Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China;College of Atmospheric Science, Nanjing University of Information Science & Technology, Nanjing 210044, China; Chongqing Institute of Meteorological Sciences, Chongqing 401147, China |
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| Abstract: | Under the incompressible condition of fluid, this paper presents a new method of calculating vertical velocity by the continuity equation, which is called z-method. The results show that the relationship between horizontal vorticity and vertical motion can also be obtained by the z-method. In other words, when the horizontal vorticity vector rotates counterclockwise, there is a rising motion, and when the horizontal vorticity vector rotates clockwise, there is a sinking motion. The effectiveness verification shows that the method proposed in this paper has high reliability in the high level, and the reliability is slightly weaker in the lower level than that in the upper level, but not ideal in the middle level. A comparisonis made with the effect of the vertical velocity solved by the p-method, finding that the p-method is slightly better than the z-method. |
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| Keywords: | vertical shear horizontal vorticity vertical velocity continuity equation vertical shear vorticity |
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