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首页> 外文学位 >Kinetic energy diagnostic studies of extratropical cyclones based on storm relative motion.
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Kinetic energy diagnostic studies of extratropical cyclones based on storm relative motion.

机译：基于风暴相对运动的温带气旋的动能诊断研究。

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摘要

The kinetic energy equations for earth and storm relative motions and their radial and tangential components are derived. The equations are used to estimate quasi-Lagrangian kinetic energy budgets of two extratropical cyclones representing different types of development, one with strong latent heat release, the other with little latent heat release. The intensification of the circulation during the evolution of both storms is uniquely identified by the kinetic energy of storm relative motion, while the kinetic energy of earth relative motion fails to make a unique identification. Decomposition of the storm relative kinetic energy budget into tangential and radial components allows the evolution of the storm's cyclonic circulation to be distinguished from kinetic energy advection and mass-momentum adjustment associated with the relative influence of the upstream and downstream jets.;Composite budgets are constructed from four storms. The results reveal a strong production of radial storm relative kinetic energy by baroclinic processes, a substantial portion of which is transformed to tangential storm relative kinetic energy through inertial processes. This source combines with inward kinetic energy transport to increase the cyclonic circulation against losses through frictional dissipation and outward ageostropic radial flow.;The relations between tangential storm relative kinetic energy and angular momentum are derived. During development accompanied by strong latent heat release, intensification of the cyclone's vortex occurs through a simultaneous increase of both angular momentum and tangential storm relative kinetic energy throughout the troposphere. Sources and sinks of storm relative tangential kinetic energy and angular momentum correspond closely with each other. The relationships between sources in the two budgets are interpreted through absolute angular momentum balance requirements in conjunction with the adjustment of the upper tropospheric circulation to lower tropospheric thermal advection and Eliassen's (1951) perspective on the forcing of the meridional mass circulation of vortices.
机译：推导了土和风暴相对运动的动能方程及其径向和切向分量。该方程用于估计代表不同发育类型的两个温带气旋的准拉格朗日动能收支，一种具有强潜热释放，另一种具有低潜热释放。通过风暴相对运动的动能可以唯一地识别出两种风暴在演化过程中环流的加剧，而地球相对运动的动能却无法进行独特的识别。将风暴的相对动能预算分解为切向和径向分量，可以使风暴的气旋循环的演化与动能对流和质量动量调整相区别，后者与上游和下游喷气机的相对影响有关。来自四场风暴。结果表明，斜压过程强烈产生了径向风暴相对动能，其中很大一部分通过惯性过程转化为切向风暴相对动能。该源与向内动能输运相结合，以增加气旋环流，防止由于摩擦耗散和向外变质径向流而造成的损失。得出切向风暴相对动能与角动量之间的关系。在伴随强潜热释放的发育过程中，整个对流层的角动量和切向风暴相对动能的同时增加，使旋风的涡旋加剧。风暴相对切向动能和角动量的源和汇彼此紧密对应。通过绝对对角动量平衡的要求以及对流层上层环流向低层对流层热平流的调整以及Eliassen（1951）关于强迫子午线质量流强迫的观点，来解释这两个预算中源之间的关系。

著录项

  • 作者

    Spaete, Paul Ernest.;

  • 作者单位

    The University of Wisconsin - Madison.;

  • 授予单位 The University of Wisconsin - Madison.;
  • 学科 Physics Atmospheric Science.
  • 学位 Ph.D.
  • 年度 1988
  • 页码 300 p.
  • 总页数 300
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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