搜索结果: 16-30 共查到“海洋科学 Instability”相关记录76条 . 查询时间(0.177 秒)
The Langmuir Circulation Instability as a Mixing Mechanism in the Upper Ocean
Langmuir Circulation Instability Mixing Mechanism Upper Ocean
2009/2/16
A numerical study of the fully nonlinear instability of the ocean to Langmuir circulations is reported. The extended Craik-Leibovich theory is used to compute the development of a mixed layer in an oc...
An Instability of Packets of Short Gravity Waves in Waters of Finite Depth
Short Gravity Waves Finite Depth
2009/2/13
We consider the stability of a solitary wave packet of short gravity waves propagating in waters of moderate depth. It is shown that such wave packets are unstable to long transverse disturbances. The...
Instability and Splitting of Mesoscale Rings using a Two-Layer Quasi-Geostrophic Model on an f-Plane
Mesoscale Rings f-Plane Two-Layer Quasi-Geostrophic Model
2009/2/10
Asymmetric instability of a circular Gaussian ring and evolution of a ring shape in a nonlinear case are studied using a two-layer quasi-geostrophic model on an f plane. Ring behavior is classified on...
Baroclinic Instability in a Downstream Varying Channel：Shelikof Strait, Alaska
Baroclinic Instability Shelikof Strait Downstream Varying Channel
2009/2/10
Moored current-meter observations obtained from upstream and downstream locations in Shelikof Strait, between Kodiak and Afognak Islands and the Alaskan mainland in the northwest Gulf of Alaska, show...
Instability of Baroclinic Flows with Horizontal Shear Along Topography
Topography Baroclinic Flows Horizontal Shear
2009/2/9
The stability of baroclinic flows with horizontal shear over sloping topography is analyzed with special emphasis on the structure and energetics of the unstable perturbatiorts. The study is conducted...
A linearized baroclinic instability model is applied to the Drake Passage area. The predictions of the model are found to be in good agreement with observations. Temporal and spatial scales are predic...
Statistics of Richardson Number and Instability in Oceanic Internal Waves
probability density function Oceanic Internal Waves Richardson Number
2009/2/8
The probability density function (pdf) of Richardson number in a Gaussian internal-wave field is derived. It is found to compare well with available data. The pdf depends on only parameter λ, the rms ...
We consider a linear model of a topographically induced shear instability, described by Pedlosky (1980). The perturbation technique used by Pedlosky, to establish the existence of unstable normal mode...
The linear stability of zonal, parallel shear flow on a beta-plane is discussed. While the localized shear region supports unstable waves, the far-field can support Rossby waves because of the ambient...
Linear Instability of a Current Flowing Along a Bottom Slope Using a Three-Layer Model
Linear Instability Current Flowing Bottom Slope Using Three-Layer Model
2009/1/22
A quasi-geostrophic model of a three-layer fluid on an f-plane is employed to study instability of a current flowing over a uniform bottom slope with isobaths parallel to the current. The model has a ...
Modal Decomposition of the Low-Frequency Currents and Baroclinic Instability at Drake Passage
Low-Frequency Currents Baroclinic Instability Drake Passage
2009/1/16
Recently collected hydrographic data show that each of the four water mass zones previously identified in Drake Passage is characterized by a distinctly different vertical profile of Brunt-Väis&a...
Barotropic Instability of Long Continental Shelf Waves In a Two-Layer Ocean
free continental shelf waves Two-Layer Ocean Barotropic Instability
2009/1/10
A two-layer model is used to examine the properties of free continental shelf waves in the presence of a mean longshore horizontally sheared barotropic current. We allow for discontinuities in the cur...
Pedlosky's theory explaining the behavior of unstable baroclinic waves in the β-plane is modified to include a sloped bottom (although the β effect is ignored). The result found is the same sort of no...
Shear Instability in a Highly Stratified Estuary
Highly Stratified Estuary vertical exchange Shear instability
2009/1/8
Shear instability is found to be the principal mechanism of vertical exchange within the pycnocline of a salt wedge estuary. A field program involving high-resolution velocity and density measurements...
The Local Baroclinic Instability of Geostrophic Spirals in the Eastern North Pacific
Local Baroclinic Instability Geostrophic Spirals Eastern North Pacific
2009/1/8
We analyze the pre-1975 hydrographic data of the Northeast Pacific and compute the large-scale two-dimensional geostrophic flow with respect to 3000 m. Using a linear three-level quasi-geostrophic mod...