Energetics of the high frequency disturbances over South America

Gan M. A.; Rao V. B.

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Energetics of the high frequency disturbances over South America

机译：南美高频干扰的能量学

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A energética dos distúrbios de alta freqüência é estudada por compostos dos sistemas cicl?nicos. Os mapas compostos s?o construídos com dados filtrados da altura geopotencial em 1000 hPa para os dias em que a anomalia negativa no ponto base 70o W, 45o S estava abaixo de dois desvios padr?es. Foram obtidos 61 compostos de sistemas cicl?nicos. A distribui??o espacial da energia potencial disponível dos distúrbios de alta freqüência é similar àquela obtida para os ciclones extratropicais do Hemisfério Norte. O ciclo de energia das anomalias filtradas com passa alta mostra que esses distúrbios crescem por convers?es baroclínicas. Durante a fase de crescimento, fluxos de energia chegando na regi?o e as fontes n?o conservativas s?o também importantes, embora a instabilidade barotrópica parece ter um papel importante sobre o oceano Pacífico durante essa fase. No estágio maduro, o distúrbio come?a a decair barotropicamente e a energia radiativa é exportada para fora da regi?o.

机译：通过旋风系统的化合物研究了高频干扰的能量学。当基点70o W，45o S处的负异常低于两个标准偏差时，使用1000 hPa的地势高度的过滤数据构建合成图。获得了61种旋风系统化合物。来自高频干扰的潜在能量的空间分布与北半球的温带气旋的空间分布相似。高通滤波异常的能量周期表明，这些压力由于斜压转换而增加。在增长阶段，到达该区域的能量流和非保守来源也很重要，尽管在该阶段正压不稳定在太平洋地区似乎起着重要作用。在成熟阶段，疾病开始正压性衰减，放射性能量输出到该区域之外。

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《Revista Brasileira de Geofisica》 |1999年第1期|共页
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Gan M. A.; Rao V. B.;
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Energetics of the high frequency disturbances over South America

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