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首页> 外文期刊>Journal of the Atmospheric Sciences >Wavelet Analysis of the Convectively Coupled Equatorial Waves in the Wavenumber-Frequency Domain
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Wavelet Analysis of the Convectively Coupled Equatorial Waves in the Wavenumber-Frequency Domain

机译:数频域对流耦合赤道波的小波分析

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摘要

Wavelet analysis is performed on 31 yr (1975-2007, except 1978 and 1979) of daily outgoing longwave radiation data in the global equatorial region (15 degrees S-15 degrees N). Power spectra in the zonal wavenumber-frequency domain are obtained. With different scales and bandwidths than in previous Fourier-based analysis, peaks of variances that are associated with the various convectively coupled waves are found. Further, possibly because of the ability to resolve shorter waves that have limited zonal extent, significant variances are also found at tropical depression-type scales. However, waves of zonal wavenumber zero cannot be explicitly analyzed.
机译:小波分析是在31年(1975-2007,1978和1979除外)上对全球赤道区域(北纬15度至北纬15度)每日输出的长波辐射数据进行的。得到了地带波数-频域的功率谱。与以前的基于傅立叶的分析相比,具有不同的尺度和带宽,可以找到与各种对流耦合波相关的方差峰值。此外,可能是由于有能力分辨出区域范围有限的短波,因此在热带tropical陷型尺度上也发现了明显的变化。但是,不能明确分析零波带状波。

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