The Time Averaged Circulation Of The North Pacific Ocean

DOWNLOAD

Download The Time Averaged Circulation Of The North Pacific Ocean PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get The Time Averaged Circulation Of The North Pacific Ocean book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page

The Time Averaged Circulation Of The North Pacific Ocean

DOWNLOAD
Author : Edward D. Zaron
language : en
Publisher:
Release Date : 1995

The Time Averaged Circulation Of The North Pacific Ocean written by Edward D. Zaron and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Ocean circulation categories.

The time-averaged velocity field in the North Pacific was estimated in two sets of inverse calculations. The planetary geostrophic equations were the basis for dynamical models of the flow in each case. The inverse estimates of the circulation were obtained by minimizing a positive-definite cost function, which measured the inconsistency of the model's predictions against a set of observations comprised of a large, high-quality hydrographic data set, and surface fluxes of heat, fresh water, and momentum. In the first part of this work, four solution methods for the generalized inverse of a linear planetary geostrophic model of the North Pacific are compared. A conjugate gradient solver applied to the equation for the generalized inverse, expressed in terms of a representer expansion, was the most computationally efficient solution method. The other methods, in order of decreasing efficiency, were, a conjugate gradient descent solver (preconditioned with the inverse of the model operators), a direct solver for the representer coefficients, and a second conjugate gradient descent solver (preconditioned so that the diagonal elements of the cost Redacted for Privacy function Hessian were unity). All but the last method were successful at minimizing the penalty function. Inverse estimates of the circulation based on the linear planetary geostrophic model were stable to perturbations in the data, and insensitive to assumptions regarding the model forcing and boundary condition uncertainties. A large calculation, which involved approximately 18,000 observations and 60,000 state variables, indicated that the linear model is remarkably consistent with the observations. The second part of this work describes an attempt to use a nonlinear planetary geostrophic model (which included realistic bottom topography, lateral momentum mixing, out-cropping layers, and air-sea fluxes of heat, freshwater, and momentum) to assimilate the same hydrographic data set as above. Because of the nonlinearity in the model, descent methods (rather than a representer-based method) were used to solve the inverse problem. The nonlinearity of the model and the poor conditioning of the cost function Hessian confounded the minimization process. A solver for the tangent-linearization of the planetary geostrophic system should be used as a preconditioner if calculations of this type are attempted in the future.

Deep Circulation Central North Pacific Ocean

DOWNLOAD
Author : William D. Barbee
language : en
Publisher:
Release Date : 1965

Deep Circulation Central North Pacific Ocean written by William D. Barbee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Ocean circulation categories.

The Average Annual Heat Balance Of The North Pacific Ocean And Its Realation To Ocean Circulation

DOWNLOAD
Author : Klaus Wyrtki
language : en
Publisher:
Release Date : 1965*

The Average Annual Heat Balance Of The North Pacific Ocean And Its Realation To Ocean Circulation written by Klaus Wyrtki and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965* with Ocean temperature categories.

Large Scale Circulation Of The North Pacific Ocean

DOWNLOAD
Author : D. Roemmich
language : en
Publisher:
Release Date : 1989

Large Scale Circulation Of The North Pacific Ocean written by D. Roemmich and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with North Pacific Ocean categories.

Indices Of Mean Monthly Geostrophic Wind Over The North Pacific Ocean

DOWNLOAD
Author : Laurence E. Eber
language : en
Publisher:
Release Date : 1959

Indices Of Mean Monthly Geostrophic Wind Over The North Pacific Ocean written by Laurence E. Eber and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with Geostrophic wind categories.

Geostrophic wind components computed from monthly mean atmospheric sea level pressure charts are employed as indices of wind intensity over the principal current systems in the North Pacific Ocean. Pressure differences across pairs of points at 36 locations and deviations from long-term monthly means are tabulated for a 33-year period, 1926-58. The data for certain locations were combined to form regional indices representing wind components tangential to the major North Pacific Ocean currents. The mean seasonal cycles of these indices show marked differences in phase and amplitude for the various regions. Monthly anomalies are found to have generally larger magnitudes in winter months than in other seasons. Some evidence of long-term trends is indicated by graphical representation of time series and decade means. In particular, weak wind components occurred over the Oyashio and Alaska currents during the winter months of the period 1946-55, while over the California current the wind components were stronger, than during the previous decade.

Atmospheric Circulation And The Related Wind Fields Over The North Pacific

DOWNLOAD
Author : Anna Ilʹinichna Sorkina
language : en
Publisher:
Release Date : 1971

Atmospheric Circulation And The Related Wind Fields Over The North Pacific written by Anna Ilʹinichna Sorkina and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Atmospheric circulation categories.

Report of investigation of synoptic processes over North Pacific Ocean. Discusses main types of synoptic processes and their associated wind fields; frequency, stability, and succession of basic types of synoptic processes; variation in the type of atmospheric circulation during last half century. Translated from Russian.

Physical Oceanography And Climate

DOWNLOAD
Author : Kris Karnauskas
language : en
Publisher: Cambridge University Press
Release Date : 2020-04-02

Physical Oceanography And Climate written by Kris Karnauskas and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-04-02 with Science categories.

An engaging and accessible textbook focusing on climate dynamics from the perspective of the ocean, specifically interactions between the atmosphere and ocean. It describes the fundamental physics and dynamics governing the behaviour of the ocean, and provides numerous end-of-chapter questions and access to online data sets.

The General Circulation In The North Pacific Ocean Referred To A Variable Reference Surface

DOWNLOAD
Author : William Bruce McAlister
language : en
Publisher:
Release Date : 1962

The General Circulation In The North Pacific Ocean Referred To A Variable Reference Surface written by William Bruce McAlister and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with Ocean currents categories.

Report On Oceanic Circulation Based On The Observations Made On Board H M S Challenger And Other Observations

DOWNLOAD
Author : Alexander Buchan
language : en
Publisher:
Release Date : 1895

Report On Oceanic Circulation Based On The Observations Made On Board H M S Challenger And Other Observations written by Alexander Buchan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1895 with Deep-sea temperature categories.

Ocean Circulation

DOWNLOAD
Author : Open Open University
language : en
Publisher: Elsevier
Release Date : 2001-09-17

Ocean Circulation written by Open Open University and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-09-17 with Science categories.

This second edition retains the general structure of the first edition, buthas been updated in the light of recent oceanographic research, and improvedas a teaching text on the basis of feedback from past students and otherreaders.Notable additions include new sections addressing the topic ofnumerical modelling, and more discussion of natural oscillations in theocean-atmosphere system (previously confined to the El Niño phenomenon). Inparticular, the Chapter on the North Atlantic now includes a discussion ofthe North Atlantic Oscillation, as well as of the Great Salinity Anomaly. Inthe final Chapter, treatment of water mass formation has been updated toreflect recent ideas about the processes involved and how they relate toclimatic change over different time-scales, from decades to millennia. High quality full colour diagramsSubstantial chapter summaries ideal for revisionAnswers, hints and notes for questions at back of the book