Inertia gravity wave activity in the troposphere and lower stratosphere observed by Wuhan MST radar  

作　　者：QING HaiYin ZHOU Chen ZHAO ZhengYu NI BinBin ZHANG YuanNong 

机构地区：[1]Department of Space Physics, School of Electronic Information, Wuhan University

出　　处：《Science China Earth Sciences》2016年第5期1066-1073,共8页中国科学（地球科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 41204111);the Fundamental Research Fund for the Central Universities of China (Grant No. 2014212020202)

摘　　要：The troposphere and lower stratosphere(TLS) is a region with active atmospheric fluctuations. The Wuhan Mesosphere-Stratosphere-Troposphere(MST) radar is the first MST radar to have become operational in China's Mainland. It is dedicated to real-time atmospheric observations. In this paper, two case studies about inertia gravity waves(IGWs) derived from three-dimensional wind field data collected with the Wuhan MST radar are presented. The intrinsic frequencies, vertical wavelengths, horizontal wavelengths, vertical wavenumber spectra, and energy density are calculated and analyzed. In this paper, we also report on multiple waves existing in the lower stratosphere observed by the Wuhan MST radar. Lomb-Scargle spectral analysis and the hodograph method were used to derive the vertical wavenumber and propagation direction. Meanwhile, an identical IGW is observed by Wuhan MST radar both in troposphere and lower stratosphere regions. Combining the observations, the source of the latter IGW detected in the TLS would be the jet streams located in the tropopause region, which also produced wind shear above and below the tropopause.The troposphere and lower stratosphere（TLS） is a region with active atmospheric fluctuations. The Wuhan Mesosphere-Stratosphere-Troposphere（MST） radar is the first MST radar to have become operational in China's Mainland. It is dedicated to real-time atmospheric observations. In this paper, two case studies about inertia gravity waves（IGWs） derived from three-dimensional wind field data collected with the Wuhan MST radar are presented. The intrinsic frequencies, vertical wavelengths, horizontal wavelengths, vertical wavenumber spectra, and energy density are calculated and analyzed. In this paper, we also report on multiple waves existing in the lower stratosphere observed by the Wuhan MST radar. Lomb-Scargle spectral analysis and the hodograph method were used to derive the vertical wavenumber and propagation direction. Meanwhile, an identical IGW is observed by Wuhan MST radar both in troposphere and lower stratosphere regions. Combining the observations, the source of the latter IGW detected in the TLS would be the jet streams located in the tropopause region, which also produced wind shear above and below the tropopause.

关 键 词：Wuhan MST radar TLS Inertia gravity waves Brunt-Vaisala frequency Richardson number 

分 类 号：P412.25[天文地球—大气科学及气象学]