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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Linking entropy flow with typhoon evolution: a case-study
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Linking entropy flow with typhoon evolution: a case-study

机译：将熵流与台风演化联系起来：一个案例研究

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This paper is mainly aimed at investigating the relationship of entropy flow with an atmospheric system (typhoon), based on the observational analyses covering its whole life-cycle. The formula for calculating entropy flow is derived starting with the Gibbs relation with data from the NCEP/NCAR reanalysis. The results show that: (i) entropy flow characteristics at different vertical layers of the system are heterogeneous with predominant negative entropy flow in the large portion of the troposphere and positive ones at upper levels during its development; (ii) changes in the maximum surface wind velocity or the intensity of a typhoon are synchronous with the total entropy flow around the typhoon centre and its neighbourhood, suggesting that the growth of a severe atmospheric system relies greatly upon the negative entropy flow being strong enough, and that entropy flow analysis might provide a particular point of view and a powerful tool to understand the mechanism responsible for the life-cycle of an atmospheric system and associated weather events; and (iii) the horizontal pattern of negative entropy flow near the surface might contain some significant information conducive to the track forecast of typhoons.
机译：本文的主要目的是在涵盖整个生命周期的观测分析的基础上，研究熵流与大气系统（台风）的关系。从Gibbs关系开始，并结合来自NCEP / NCAR重新分析的数据，得出用于计算熵流的公式。结果表明：（i）系统不同垂直层的熵流特征是非均质的，在对流层的大部分区域，熵负流占主导地位，在对流层的发展过程中，熵流处于较高水平; （ii）最大表面风速或台风强度的变化与台风中心及其附近地区的总熵流同步，这表明严重的大气系统的增长在很大程度上取决于负熵流足够强，并且熵流分析可能会提供一种特殊的观点和强大的工具，以了解负责大气系统生命周期和相关天气事件的机制; （iii）地表附近负熵流的水平模式可能包含一些有助于台风径迹预报的重要信息。

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