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对流层上传重力波的非线性演化
Alternative TitleNONLINEAR EVOLUTION OF A GRAVITY WAVE PROPAGATING FROM THE TROPOPAUSE
王咏梅; 徐寄遥; 王英鉴; 北京8701信箱
Department空间天气学国家重点实验室
Source Publication地球物理学报
2001
Volume44Issue:2Pages:154-161
ISSN0001-5733
Language中文
Keyword数值模拟 非线性 重力波 破碎
Abstract利用二维全隐欧拉格式对重力波在可压、非等温大气中的非线性传播过程进行了数值模拟和分析 .分析结果表明 ,从对流层顶激发的重力波能稳定地经平流层传到中层顶 ,从而将能量和动量从一个区域带到另一个区域 ;在向上传播过程中 ,重力波经历了发展、位温翻转、对流直至最终破碎的演变 ;重力波的破碎是对流和小尺度波动的重要的源 ,对流不稳定和翻转是非线性现象的一个基本特征 .计算还显示 ,扰动源的大小直接影响着重力波的非线性传播过程 ,当扰动源足够小时 ,重力波能稳定传播 ,而大振幅扰动可以加速重力波的破碎
Other AbstractBy using a Full Implicite Continuous Eulerian (FICE) scheme, a two dimensional numerical model for describing nonlinear propagation of a gravity wave in the compressible and nonisothermal atmosphere is established. The result shows that gravity wave excited by the tropopause forcing can propagate stably to the mesosphere through the stratosphere so that the energy and momentum can be transferred from a region to another. In the propagation, gravity wave undergoes growth, overturning, convection and breaking. The breaking of gravity wave is the important source of convection and smallscale waves,and convective instability and overturn are the character of nonlinear phenomenon. It can be inferred that the size of the perturbing source affects directly the propagation of nonlinear grav- ity wave. When the source is sufficiently small gravity wave can propagate stably,and large amplitude forcing can accelerate the breaking of gravity wave.
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1200
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
王咏梅,徐寄遥,王英鉴,等. 对流层上传重力波的非线性演化[J]. 地球物理学报,2001,44(2):154-161.
APA 王咏梅,徐寄遥,王英鉴,&北京8701信箱.(2001).对流层上传重力波的非线性演化.地球物理学报,44(2),154-161.
MLA 王咏梅,et al."对流层上传重力波的非线性演化".地球物理学报 44.2(2001):154-161.
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