MST Radar Observations of a Saturated Gravity Wave Spectrum
MST Radar Observations of a Saturated Gravity Wave Spectrum
复制标题
DOI：
10.1175/1520-0469(1989)046
复制
发表时间：
1989-08
影响因子：
3.1
通讯作者：
T. Tsuda;T. Inoue;S. Kato;S. Fukao;D. Fritts;T. Vanzandt
中科院分区：
文献类型：
--
作者：
T. Tsuda;T. Inoue;S. Kato;S. Fukao;D. Fritts;T. Vanzandt
本文利用1986年10月和1987年6月日本35°N的MU雷达在对流层、低平流层和中间层的观测资料，以及1983年6月波多黎各18°N的Arecibo UHF雷达在平流层低层的观测资料，给出了中尺度风波动的垂直波数谱。这些光谱比以前可用的光谱更加均匀，因为所有数据都是通过相同的雷达技术观测的，不同大气区域的数据基本上是同时获取的，并且所有光谱都是使用非常相似的方法进行分析的。在观测光谱的大波数范围内，无症状斜率和振幅与Dewan和Good（1986）和Smith等人（1987）开发的饱和重力波谱模型非常一致，该模型的斜率为−3，光谱振幅与浮力频率的平方成比例。模式谱与不同高度的观测谱符合较好。
Abstract We present vertical wavenumber spectra of mesoscale wind fluctuations using data observed in the troposphere, lower stratosphere and mesosphere by the MU radar at 35°N in Japan in October 1986 and June 1987, as well as lower stratospheric spectra obtained by the Arecibo UHF radar at 18°N in Puerto Rico in June 1983. These spectra are much more homogeneous than previously available spectra since all of the data were observed by the same radar technique, the data in the different atmospheric regions were taken essentially simultaneously, and all of the spectra were analyzed using very similar methods. In the large-wavenumber ranges of the observed spectra, the asymptomatic slopes and amplitudes agree well with the saturated gravity wave spectral model developed by Dewan and Good (1986) and Smith et al. (1987), which has a slope of −3 and a spectral amplitude proportional to the buoyancy frequency squared. The good agreement between the model spectrum and the observed spectra from different altitude...