Analytical Solutions for the Thermal Forcing Vortices in the Boundary Layer and Its Applications
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摘要: 考虑边界层低涡为受非绝热加热和摩擦强迫并满足热成风平衡的轴对称涡旋系统,采用Boussinesq近似，通过求解柱坐标系中涡旋模式的初值问题，分析了热源强迫对低涡流场结构的影响．结果表明：热源强迫对低涡的流场结构有重要影响，并且这种影响的具体表现形式与加热的径向分布有密切关系．对边界层涡旋解讨论的结果可以解释青藏高原低涡系统的某些重要结构特征．Abstract: Using the Boussinesq approximation, the vortex in the boundary layer was assumed to be axisymmetrical and thermal-wind balanced system forced by diabatic heating and friction, and was solved as an initial-value problem of linearized vortex equation set in cylindrical coordinates. The impacts of thermal forcing on the flow field structure of vortex were analyzed. It is found that thermal forcing has significant impacts on the flow field structure, and the material representative forms of these impacts are closely related to the radial distribution of heating. The discussion for the analytical solutions for the vortex in the boundary layer can explain some main structures of the vortex over the Tibetan Plateau.
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Key words:
- vortex /
- boundary layer /
- analytical solutions /
- thermal forcing /
- structure
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[1] Stull R B.边界层气象学导论[M].杨长新 译.北京：气象出版社，1991，1-23. [2] 叶笃正，高由禧.青藏高原气象学[M].北京：科学出版社，1979，122-126. [3] 罗四维.青藏高原及其邻近地区几类天气系统的研究[M].北京：气象出版社，1992，7-55. [4] 乔全明，张雅高.青藏高原天气学[M].北京：气象出版社，1994，120-155. [5] Dell'osso L，Chen S J.Numerical experiments on the genesis of vortices over the Qinghai-Xizang Plateau[J].Tellus A，1986，38(3)：236-250. [6] Shen R J，Reiter E R，Bresch J F.Some aspects of the effects of sensible heating on the development of summer weather systems over the Tibetan Plateau[J].J Atmos Sci，1986，43(20)：2241-2260. doi: 10.1175/1520-0469(1986)043<2241:SAOTEO>2.0.CO;2 [7] BIN Wang， Oranski I.Study of a heavy rain vortex formed over the eastern flank of the Tibetan Plateau[J].Mon Wea Rev，1987，115(7)：1370-1393. doi: 10.1175/1520-0493(1987)115<1370:SOAHRV>2.0.CO;2 [8] 罗四维，杨洋，吕世华.一次青藏高原夏季低涡的诊断分析研究[J].高原气象，1991，10（1）：1-12. [9] 陈伯民，钱正安，张立盛.夏季青藏高原低涡形成和发展的数值模拟[J].大气科学，1996，20（4）：491-502. [10] 刘式适，刘式达.大气动力学[M].北京：北京大学出版社，1991，77-109，135-137. [11] 刘新，吴国雄，李伟平，等.夏季青藏高原加热和大尺度流场的热力适应[J].自然科学进展，2001，11（1）：33-39. [12] 李伟平，吴国雄，刘屹岷，等.青藏高原表面过程对夏季青藏高压的影响——数值试验[J].大气科学，2001，25（6）：809-816. [13] ZHANG Guang-zhi，XU Xiang-de, WANG Ji-zhi.A dynamic study of Ekman characteristics by using 1998 SCSMEX and TIPEX boundary layer data[J].Adv Atmos Sci，2003，20(3)：349-356. doi: 10.1007/BF02690793 [14] Gray S L，Craig G C.A simple theoretical model for the intensification of tropical cyclones and polar lows[J].Q J R Meteorol Soc，1998，124(547)：919-947. doi: 10.1002/qj.49712454713 [15] Walsh K J E，Watterson I G.Tropical cyclone-like vortices (TCLV) in a limited area model：comparison with observed climatology[J].J Climate，1997，10(9)：2240-2259. doi: 10.1175/1520-0442(1997)010<2240:TCLVIA>2.0.CO;2 [16] Nguyen K C，Walsh K J E.Interannual, decadal, and transient greenhouse simulation of tropical cyclone-like vortices in a regional climate model of the South Pacific[J].J Climate，2001，14(13)：3043-3054. doi: 10.1175/1520-0442(2001)014<3043:IDATGS>2.0.CO;2 -
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