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Efficient estimation of time-mean states of ocean models using 4D-Var and implicit time-stepping
Efficient estimation time-mean states ocean models 4D-Var implicit time-stepping
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2009/11/3
We propose an efficient method for estimating a time-mean state of an ocean model subject to given observations using implicit time-stepping. The new method uses (i) an implicit implementation of the ...
On the Variability of Surface Tension with Mean Wind Speed
Surface Tension Mean Wind Speed
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2009/3/7
In situ measurements of surface tension obtained by R.V. Gauss under coastal (North Sea of the Island of Sylt) and by R.V. Meteor under open sea conditions (GATE area) are Compared with time variation...
Numerical Simulation Studies of Oceanic Anomalies in the North Pacific Basin. I：The Ocean Model and the Long-Term Mean State
Oceanic Anomalies North Pacific Basin Long-Term Mean State
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2009/2/23
A three-dimensional, prognostic numerical model of the North Pacific Ocean, possessing an actual coastal configuration and ten layers (but constant depth), has been developed in order to show the phys...
Stable Jet Modes：A Special Case of Eddy and Mean Flow Interaction
Stable Jet Modes Eddy Mean Flow Interaction
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2009/2/23
The quasi-geostrophic, small-amplitude free modes of oscillation are examined for a midlatitude ocean basin with mean currents. Attention is restricted to a particular class of mean currents which are...
Monthly Mean Wind Fields for the South Atlantic Bight
Monthly Mean Wind Fields South Atlantic Bight
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2009/2/18
A total of 339 389 marine weather observations have been analyzed to Produce Monthly mean wind fields for the South Atlantic Bight. The results of plotting wind vectors on a 1/2° latitude by 1/2° long...
Some Eulerian-Scale Analysis Results：Eddy Terms in the Mean Heat, Momentum and Vorticity Equations
Eulerian-Scale Analysis Results Eddy Terms Mean Heat Vorticity Equations
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2009/2/18
The question of the importance of mesoscale motions in the long time averaged ocean circulation is examined from the viewpoint offered by Eulerian scale estimates of the magnitudes of the explicit edd...
On the Structure and Dynamics of Monthly Mean Sea Level Anomalies along the Pacific Coast of North and South America
Monthly Mean Sea Level Anomalies America
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2009/2/16
The behavior and relationship of anomalies of monthly mean sea level, coastal sea surface temperature and alongshore wind stress for the eastern Pacific Ocean during the period 1950–74 have been studi...
A Theory of the Mean Flow Driven by Long Internal Waves in a Rotating Basin, with Application to Lake Kinneret
Mean Flow Driven Rotating Basin Long Internal Waves
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2009/2/13
The rectified flow induced by wind-driven internal seiches in a rotating lake is studied. Friction and nonlinearity combine to generate a secondary mean flow which is calculated analytically for the c...
The Effect of the Oceanic Boundary Layer on the Mean Drift of Pack Ice：Application of a Simple Model
Oceanic Boundary Layer Pack Ice Mean Drift
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2009/2/13
Smoothed records of ice drift, surface wind and upper ocean currents at four manned stations of the 1975–76 AIDJEX experiment in the central Arctic have been analyzed to provide a statistical relation...
Simulation and Verification of Lake Ontario’s Mean State
International Field Year for the Great Lakes Mean State
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2009/2/10
A numerical dynamic model based on primitive equations has been developed for Lake Ontario. Many experimental tests for parameter selections and alternative formulations of physical processes in the m...
Monthly Mean Sea Level Fluctuations at Honolulu and San Francisco and the Intervening Geostrophic Currents
Monthly Mean Sea Level Fluctuations Honolulu San Francisco Intervening Geostrophic Currents
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2009/2/10
Monthly mean dynamic topography (0/500 db) along the great-circle section between Honolulu and San Francisco reveals four principal current regimes: a northerly flow immediately adjacent to the Hawaii...
Annual Mean Surface Heat Fluxes in the Tropical Pacific Ocean
Mean Surface Heat Fluxes Tropical Pacific Ocean
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2009/2/9
The four components of the long-term annual mean net surface heating of the tropical Pacific Ocean between 30°N and 40°S are calculated and portrayed. These flux elements were derived by using the bul...
Steady-State Diagnostic Model of Summer Mean Circulation on the Georgia Shelf
Steady-State Diagnostic Model Georgia Shelf Summer Mean Circulation
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2009/2/8
The Galt (1975) diagnostic model was used to investigate summer circulation on the Georgia shelf. The steady-state model uses a finite-element method to solve the depth-integrated vorticity equation f...
The Effects of Mean Shear Flow on Equatorial Basin Modes
Mean Shear Flow Equatorial Basin Modes
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2009/2/8
We test the sensitivity of energy trapping by equatorial basin modes to the presence of mean currents in a series of numerical experiments. At low frequency, trapping persists in the form of modified ...
Monthly Mean Sea-Level Variability Along the West Coast of North America
Monthly Mean Sea-Level Variability North America West Coast
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2009/2/8
Linear statistical estimators are used to examine 29 years of nonseasonal, monthly-mean, tide-gauge sea-level data along the west coast of North America. The objective is exploration of the structure,...