搜索结果: 1-15 共查到“海洋科学 Subduction”相关记录19条 . 查询时间(0.25 秒)
Manufacturing Continental Crust in the Subduction Factory
Manufacturing Continental Crust Subduction Factory
2015/7/24
Subduction zones have been consuming oceanic lithosphere since the dawn of plate tectonics on this planet (Figure 1). Raw materials such as pelagic and terrigenous sediments, altered and fresh basalti...
Seamounts are ubiquitous features of the seafloor that form part of the fabric of oceanic crust. When a seamount enters a subduction zone, it has a major affect on forearc morphology, the uplift histo...
The "Subduction Factory" is a metaphor for the geochemical processing of subducted oceanic crust and sediment into components that are either incorporated into the volcanic arc or recycled into Earth'...
From basalts to boninites: The geodynamics of volcanic expression during induced subduction initiation
volcanic expression induced subduction initiation
2014/4/8
Subduction initiation may unfold via different pathways in response to plate strength, plate age, and driving mechanism. Such pathways
infl uence volcanism on the overriding plate and may be p...
On the Relationship between Subduction Rates and Diabatic Forcing of the Mixed Layer
Subduction Rates Diabatic Forcing Mixed Layer
2008/12/24
The transport of mass between a mixed layer, exposed to mechanical and thermodynamic forcing, and an adiabatic thermocline is studied for gyre-scale motions. It is shown that if the mixed layer can be...
Inferring the Subduction Rate and Period over the North Atlantic
Subduction Rate North Atlantic mixed-layer fluid
2008/12/18
The annual rate at which mixed-layer fluid is transferred into the permanent thermocline—that is, the annual subduction rate Sann and the effective subduction period eff—is inferred from climatologica...
Ventilation of the North Atlantic and North Pacific：Subduction Versus Obduction
North Atlantic North Pacific Subduction Versus Obduction
2008/12/12
Ventilation in the North Atlantic and North Pacific is examined by analyzing the Levitus climatological data and the Hellerman and Rosenstein wind stress data. Ventilation between the permanent pycnoc...
On the Thermodynamics of Subduction
surface mixed layer ideal-fluid thermocline Thermodynamics
2008/12/11
The thermodynamic processes attendant on the transfer of fluid between a surface mixed layer and a stratified thermocline beneath are discussed. For a parcel of fluid in the mixed layer to pass into t...
Shallow Pycnoclines and Mode Water Subduction in the Eastern North Atlantic
Shallow Pycnoclines Eastern North Atlantic Subpolar Mode Water
2008/12/3
A Lagrangian one-dimensional model is used to study the subduction of Subpolar Mode Water in the eastern North Atlantic and to analyze recently observed hydrological features related to this process.
A Numerical Investigation of Effects of a Tilt of the Zero Wind Stress Curl Line on the Subduction Process
three-dimensional ocean general circulation model nonzonal wind stress curl
2008/11/18
A three-dimensional ocean general circulation model is used to investigate the effects of an idealized, nonzonal wind stress curl on the subduction process in the subtropical gyre. Idealized zonal win...
Evolution of Subduction Planetary Waves with Application to North Pacific Decadal Thermocline Variability
Subduction Planetary Waves North Pacific Decadal Thermocline Variability
2008/8/13
The evolution of decadal subduction temperature anomalies in the subtropical North Pacific is studied using a simple and a complex ocean model. It is found that the amplitude of the temperature anomal...
Mesoscale Subduction at the Antarctic Polar Front Driven by Baroclinic Instability
Mesoscale Subduction Antarctic Polar Front Driven Baroclinic Instability
2008/8/7
A study of mesoscale subduction at the Antarctic Polar Front (PF) is conducted by use of hydrographic data from a high-resolution, quasi-synoptic survey of the front. The geostrophic velocity and isop...
Interannual Variability in the Thermodynamics of Subduction over the North Atlantic
Interannual Variability Subduction North Atlantic
2008/7/25
Subduction requires a buoyancy input into the mixed layer, which over the gyre scale can either be achieved by an atmospheric input or a wind-induced Ekman redistribution of buoyancy. The buoyancy bud...
A Numerical Investigation of the Subduction Process in Response to an Abrupt Intensification of the Westerlies
Numerical Investigation Subduction Process Abrupt Intensification Westerlies
2008/7/17
A three-dimensional ocean general circulation model, forced by idealized zonal winds, is used to investigate the effect of an abrupt intensification of westerly winds on the subduction process. Four e...
Subduction of Decadal North Pacific Temperature Anomalies: Observations and Dynamics
Subduction Decadal North Pacific Temperature Dynamics
2008/7/10
Observations of oceanic temperature in the upper 400 m reveal decadal signals that propagate in the thermocline along lines of constant potential vorticity from the ventilation region in the central N...