Gravity wave momentum flux spectra observed from satellite in the summertime subtropics: Implications for global modeling
Gravity wave momentum flux spectra observed from satellite in the summertime subtropics: Implications for global modeling
复制标题
从卫星观测到的夏季副热带重力波动量通量谱：对全球建模的启示
DOI：
10.1029/2012gl052659
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发表时间：
2012
影响因子：
5.2
通讯作者：
P. Preusse
中科院分区：
文献类型：
--
作者：
M. Ern;P. Preusse
首次推导了重力波动量通量空间观测的水平波数和垂直波数的谱分布。本文着重于副热带高分辨率动力学测深仪(HIRDLS)的观测，并将特别强的深对流强迫的谱与从动量通量较小的区域推断的背景进行比较。在较宽的垂直波数和相速度范围内，当水平波数较大时，深对流谱明显增强。观测结果表明，深对流产生的GW是背景谱上的一个重要贡献，这是由于其他GW源(纬向平均至少约20-30%来自对流性GW)。讨论了其对全球建模的影响。
The spectral distribution in terms of horizontal and vertical wavenumber is deduced for gravity wave (GW) momentum flux observations from space for the first time. The paper focuses on High Resolution Dynamics Limb Sounder (HIRDLS) observations in the subtropics and compares spectra over particularly strong deep convective forcing with a background inferred from regions of less momentum flux. The deep convective spectra are strongly enhanced at high horizontal wavenumbers over a wide range of vertical wavenumbers and phase speeds. The observations indicate that GWs generated by deep convection are an important contribution on top of the background spectrum due to other GW sources (at least about 20–30% on zonal average is from convective GWs). The implications for global modeling are discussed.