检索结果-南通市图书馆

Probing signals of atmospheric gravity waves excited by the July 29,2021 M_(W)8.2 Alaska earthquake

Geodesy and Geodynamics 2024年第3期15卷 219-229页

作者： Geng Zhang Jianqiao Xu Xiaodong Chen Heping Sun Lizhuo Gong State Key Laboratory of Geodesy and Earth's Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan430077China University of Chinese Academy of Sciences Beijing100049China

It is commonly believed that the atmosphere is decoupled from the solid ***,it is difficult for the seismic wave energy inside the Earth to propagate into the atmosphere,and atmospheric pressure wave signals excited by earthquakes are unlikely to exist in atmospheric *** increasing number of studies have shown that earthquakes,volcanoes,and tsunamis can perturb the Earth's atmosphere due to various coupling ***,the observations mainly focus on acoustic waves with periods of less than 10 min and inertial gravity waves with periods of greater than 1 *** are almost no clear observations of gravity waves that coincide with observations of low-frequency signals of the Earth's free oscillation frequency band within 1 *** paper investigates atmospheric gravity wave signals within1 h of surface-atmosphere observations using the periodogram method based on seismometer and microbarometer observations from the global seismic network before and after the July 29,2021 M_(w)8.2 Alaska earthquake in the United *** numerical results show that the atmospheric gravity wave signals with frequencies similar to those of the Earth's free oscillations _(0)S_(2) and _(0)T_(2) can be detected in the microbaro meter *** results con firm the existence of atmospheric gravity waves,indicating that the atmosphere and the solid Earth are not decoupled within this frequency band and that seismic wave energy excited by earthquakes can propagate from the interior of the Earth to the atmosphere and enhance the atmospheric gravity wave signals within 1 h.

关键词： atmospheric gravity modes atmospheric gravity waves Alaska earthquake Normal modes Coupling of solid earth and atmosphere

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

atmospheric frontal gravity waves observed in satellite SAR images of the Bohai Sea and Huanghai Sea

引用

Acta Oceanologica Sinica 2010年第5期29卷 35-43页

作者： LIU Shuming LI Ziwei YANG Xiaofeng Pichel William G YU Yang ZHENG Quanan LI Xiaofeng The First Institute of Oceanography State Oceanic Administration Qingdao 266061 China National Marine Data and Information Service Tianjin 300171 China Institute of Remote Sensing Applications Chinese Academy of Science Beijing 100101 China NOAA/NESDIS Center for Satellite Applications and Research Camp Springs MD 20746-4304 USA Department of atmospheric and Oceanic Science University of Maryland Maryland 20742-2425 USA IMSG at NOAA/NESDIS NOAA E/RA3 WWBG Room 102 5200 Auth Road Camp Springs MD 20746-4304 USA.

In the satellite synthetic aperture radar（SAR） images of the Bohai Sea and Huanghai Sea,the authors observe sea surface imprints of wave-like patterns with an average wavelength of 3.8 *** SAR observations with sea surface wind fields and surface weather maps,the authors find that the occurrence of the wave-like phenomena is associated with the passing of atmospheric *** authors define the waves as atmospheric frontal gravity *** dynamical parameters of the wave packets are derived from statistics of 9 satellite SAR images obtained from 2002 to 2008.A two-dimensional linear physical wave model is used to analyze the generation mechanism of the *** atmospheric frontal wave induced wind variation across the frontal wave packet is compared with wind retrievals from the SAR *** CMOD-5（C-band scatterometer ocean geophysical model function） is used for SAR wind retrievals VV（transmitted vertical and received vertical） for ENVISAT and HH（transmitted horizontally and received horizontally） for RADARSAT-1.A reasonable agreement between the analytical solution and the SAR observation is *** new SAR frontal wave observation adds to the school of SAR observations of sea surface imprints of AGWs including island lee waves,coastal lee waves,and upstream atmospheric gravity waves（AGW）.

关键词： atmospheric gravity waves atmospheric front generation mechanism synthetic aperture radar

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Amplitude Factorization Method in the atmospheric gravity-Wave Equation

引用

Communications in Computational Physics 2007年第5期2卷 993-1006页

作者： Rein Room Marko Zirk Institute of Environmental Physics Tartu UniversityUlikooli 18Tartu 50090Estonia.

A novel amplitude factorization method is applied to solve a discrete buoyancy wave equation with arbitrary wind and temperature height *** solution is given in the form of a cumulative product of complex factors,which are computed by a nonlinear,inhomogeneous,two-member recurrence formula,initiated from a radiative condition on *** of the wave equation due to evanescent winds are eliminated by turbulent *** method provides an estimation of the minimal vertical resolution,required to attain a stable accurate *** areas of application of the developed numerical scheme are high resolution modelling of orographic waves for arbitrary orography in general atmospheric stratification conditions,and testing of adiabatic kernels of numerical weather prediction models.

关键词： atmospheric gravity waves linear buoyancy wave equation arbitrary stratification numerical solution amplitude factorization method.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Symmetry Analysis of Nonlinear Incompressible Non-Hydrostatic Boussinesq Equations

引用

Communications in Theoretical Physics 2010年第4期53卷 609-614页

作者：刘萍高晓楠 Department of Electronic Engineering University of Electronic Science and Technology of China Zhongshan Institute Department of Physics Shanghai Jiao Tong University

The symmetries of the （2＋1）-dimensional nonlinear incompressible non-hydrostatic Boussinesq （INHB） equations, which describe the atmospheric gravity waves （GWs）, are researched in this paper. The Lie symmetries and the corresponding reductions are obtained by means of classical Lie group approach. Calculation shows the INHB equations are invariant under some Galilean transformations, scaling transformations, and space-time translations. The symmetry reduction equations and similar solutions of the INHB equations are proposed.

关键词： incompressible non-hydrostatic Boussinesq equations classical Lie group approach symmetries similarity reductions atmospheric gravity waves

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Wavelike perturbations in Titan’s ionosphere and their compositional variation:A preliminary survey of Cassini Ion Neutral Mass Spectrometer measurements

引用

Earth and Planetary Physics 2022年第6期6卷 522-528页

作者： ShiQi Wu DanDan Niu WeiQin Sun XiaoShu Wu HaoYu Lu Jun Cui School of Space and Environment Beihang UniversityBeijing 100191China Institute of Space Science and Applied Technology Harbin Institute of TechnologyShenzhen 518055GuangdongChina Planetary Environmental and Astrobiological Research Laboratory(PEARL) School of Atmospheric SciencesSun Yat-sen UniversityZhuhai 519082GuangdongChina Center for Excellence in Comparative Planetology Chinese Academy of SciencesHefei 230026China

Wavelike perturbations in the ionosphere of Titan,the largest satellite of Saturn,are explored based on the Cassini Ion Neutral Mass Spectrometer(INMS)*** wavelike perturbations are identified for more than twenty ion species,from simple ones such as N^(+)and CH_(4)^(+)to complex ones such as C_(2)H_(3)CNH^(+)and C_(4)H_(7)^(+).Simultaneous wavelike perturbations in background N_(2),indicative of atmospheric gravity waves,are also observed,motivating us to speculate that the INMS-derived ion perturbations are *** amplitudes of the ion perturbations are found to be larger than that of the N_(2)*** compositional variation is revealed by the data:heavier ion species exhibit greater *** observations might be understood based on considerations either of force balance or chemical loss in Titan’s ionosphere.

关键词： Titan atmospheric gravity waves ionospheric perturbations ionospheric composition Cassini

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Monitoring traveling ionospheric disturbances using the GPS network around China during the geomagnetic storm on 28 May 2011

Monitoring traveling ionospheric disturbances using the GPS ...

引用

中国科学院地质与地球物理研究所2013年度（第13届）学术年会

作者： SONG Qian DING Feng WAN WeiXing NING BaiQi ZHAO BiQiang CAS Key Laboratory of Ionospheric Environment Institute of Geology and GeophysicsChinese Academy of Sciences Beijing National Observatory of Space Environment Institute of Geology and GeophysicsChinese Academy of Sciences University of Chinese Academy of Sciences

Larger-scale traveling ionospheric disturbances(LSTTDs) are studied using the total electron content(TEC) data observed from 246 GPS receivers in and around China during the medium storm on 28 May *** is the first attempt to get the two-dimensional TEC perturbation maps in *** LSTID events are detected:one is in southwestern China before midnight propagating from low to middle latitude to the distance of about 1200 km with the phase front extending to about 500 km, and the other is in northeastern China after midnight propagating from middle to low latitudes to the distance of about 1200 km with the phase front extending to nearly 1400 *** using the multichannel maximum-entropy method,we get the propagation parameters of these two *** LSTID that occurs before midnight has a higher horizontal phase velocity and a larger damping rate corresponding to the after midnight LSTID,and this may be caused by the relatively large vertical background TEC and high atmospheric temperature in the southwest of China before *** to the variations of magnetic H component observed in high latitudes,the source region for the after midnight LSTTD is likely to be located 1400-2600 km east of 140°E and north of 42°N;the before midnight LSTID is propably excited by the atmospheric gravity waves(AGWs) generated by the Joule heating of the equatorial electrojet.

关键词： GPS large scale traveling ionospheric disturbances atmospheric gravity waves total electron content

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：