JIELA Qutie,WANG Haijiang,GAO Mengqing,et al.Simulation of Radar Echo from Mesocyclones and Tornadoes based on Rankine Model[J].Journal of Chengdu University of Information Technology,2020,35(01):36-42.[doi:10.16836/j.cnki.jcuit.2020.01.007]
基于蓝金模式下的中气旋与龙卷雷达回波模拟
- Title:
- Simulation of Radar Echo from Mesocyclones and Tornadoes based on Rankine Model
- 文章编号:
- 2096-1618(2020)01-0036-07
- Keywords:
- mesocyclone; tornado; Rankine model; echo data
- 分类号:
- TN959.4
- 文献标志码:
- A
- 摘要:
- 中气旋是强对流灾害性天气发生的特征,其形成过程分为生成阶段、成熟阶段和消亡阶段,处于成熟阶段的中气旋在4个不同高度层上具有不同的速度特征。强烈的中气旋或扩展到地面附近的中等以上强度的中气旋产生龙卷的概率约为40%。绝大多数龙卷发生于中气旋核区内,但并不是所有的中气旋都能发展成龙卷。多普勒天气雷达是探测中气旋与龙卷的射频传感器,但可用的中气旋与龙卷的回波数据有限,对中气旋与龙卷展开数值模拟是一种可供选择的方法。本文首先利用蓝金模式模拟出中气旋的风场和中气旋核区内发生龙卷时的风场。然后使用多普勒雷达对该风场进行探测,生成中气旋与龙卷回波数据,并显示出多普勒雷达径向速度图。生成的回波数据可用于中气旋与龙卷识别算法的验证。
- Abstract:
- In the formation process of a mesocyclone that is the features of hazardous convective weather can be divided into three stages: generation stage, maturity stage and extinction stage. A mesocyclone in maturity stage has diverse velocity characteristics at four different altitudes. The probability of a tornado occurring in a strong mesocyclone or a mesocyclone with moderate or higher intensity extending near the ground is about 40%. Multiple tornadoes occur in the center of mesocyclones, but not all of the mesocyclones can develop into tornadoes. Doppler weather radar is a kind of radio-frequency sensor that can detect mesocyclones and tornadoes, but the amount of echo data available to apply is limited, so the numerical simulation of mesocyclones and tornadoes is an alternative. In this paper, the wind field of mesocyclone and tornado in the center of mesocyclone are initially simulated by Rankine model. Then the mesocyclone and tornado echo data can be generated and then display the Doppler radar velocity image after the wind fields are sounded by Doppler radar. The generated echo data generated can be applied to the verification of mesocyclones and tornadoes identification algorithm.
参考文献/References:
[1] 郑媛媛,俞小鼎,方翀,等.一次典型超级单体风暴的多普勒天气雷达观测分析[J].气象学报,2004,62(3):317-328.
[2] 吴芳芳,俞小鼎,王慧,等.一次强降水超级单体风暴多普勒天气雷达特征[J].大气科学学报,2010,33(3):285-298.
[3] 冯晋勤,汤达章,俞小鼎,等.新一代天气雷达中气旋识别产品的统计分析[J].气象,2010,36(8):47-52.
[4] 魏文秀,赵亚民.中国龙卷风的若干特征[J].气象,1995,21(5):36-40.
[5] 焦中生.气象雷达原理[M].气象出版社,2005.
[6] 俞小鼎,郑媛媛,张爱民,等.安徽一次强烈龙卷的多普勒天气雷达分析[J].高原气象,2006(5):914-924.
[7] Xu Q,Wei L,Nai K.Analyzing Vortex Winds in Radar-Observed Tornadic Mesocyclones for Nowcast Applications[J].Weather and Forecasting,2015,30(5):1140-1157.
[8] Wood V T,White L W.A Parametric Wind-Pressure Relationship for Rankine versus Non-Rankine Cyclostrophic Vortices[J].Journal of Atmospheric and Oceanic Technology, 2013, 30(12):2850-2867.
[9] Brown R A,Wood V T.Detection of the Presence of Tornadoes at the Center of Mesocyclones Using Simulated Doppler Velocity Measurements[J].Weather & Forecasting,2015,30(4).
[10] Burgess D W.Single Doppler radar vortex recognition.Part I:Mesocyclone signatures[C].1976.
[11] Browning K A,Foote G B.Airflow and hail growth in supercell storms and some implications for hail suppression[J].The Quarterly Journal of the Royal Meteorological Society,1976,102(433):499-533.
[12] Doswell C A I,Burgess D W.Tornadoes and toraadic storms:A review of conceptual models[J].Washington Dc American Geophysical Union Geophysical Monograph,1993,79.
[13] Lee B D.The Numerical Simulation of Non-Supercell Tornadogenesis[J]. Journal of the Atmospheric Sciences,1995,54(1):32-60.
[14] Tripoli G J.An explicit three-dimensional nonhydrostatic numerical simulation of a tropical cyclone[J].Meteor.atmos.phys,1992,49(1-4):229-254.
[15] Wicker L J.a Numerical Simulation of a Tornado-Scale Vortex in a Three-Dimensional Cloud Model[J].Water Science & Technology A Journal of the International Association on Water Pollution Research,1990,55(5):249-56.
[16] Davies-Jones, Robert. A review of supercell and tornado dynamics[J].Atmospheric Research,2015,158-291.
相似文献/References:
[1]赵 亮.龙卷过程中雷达合成切变产品的分析[J].成都信息工程大学学报,2017,(03):269.[doi:10.16836/j.cnki.jcuit.2017.03.007]
ZHAO Liang.Analysis of Radar Composite Shear Products in the Process of Tornado[J].Journal of Chengdu University of Information Technology,2017,(01):269.[doi:10.16836/j.cnki.jcuit.2017.03.007]
备注/Memo
收稿日期:2019-03-28基金项目:国家自然科学基金资助项目(U1733103); 四川省科技厅资助项目(2018JZ0030)