Observational and Modelling Studies of the California Current Mesoscale PDF Download
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Author:
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ISBN:
Category :
Languages : en
Pages : 0
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Book Description
The goal of this project was to use observations from the Eastern Boundary Currents (EBC) field experiment and a quasigeostrophic model to describe and predict the dynamical balances of nonlinear eddies observed in the California Current System (CCS). The synoptic, 2-D, quantitative estimates of horizontal shears, vorticity, and divergence resolved by our observations are new, and they have revealed a mesoscale eddy field that is strongly nonlinear, with Rossby numbers of O(1). Model reconstruction of one of the anticyclones confirms the large Rossby number and nonlinearity. The model results suggest that the anticyclones are submesoscale coherent vortices.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
The goal of this project was to use observations from the Eastern Boundary Currents (EBC) field experiment and a quasigeostrophic model to describe and predict the dynamical balances of nonlinear eddies observed in the California Current System (CCS). The synoptic, 2-D, quantitative estimates of horizontal shears, vorticity, and divergence resolved by our observations are new, and they have revealed a mesoscale eddy field that is strongly nonlinear, with Rossby numbers of O(1). Model reconstruction of one of the anticyclones confirms the large Rossby number and nonlinearity. The model results suggest that the anticyclones are submesoscale coherent vortices.
Author: Amoreena MacFadyen
Publisher:
ISBN:
Category : Juan de Fuca Eddy
Languages : en
Pages : 222
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Book Description
Author: Mary L. Batteen
Publisher:
ISBN:
Category : Ocean circulation
Languages : en
Pages : 61
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Book Description
This bibliography has been prepared for use in the Ocean Prediction Through Observation, Modeling and Analysis (OPTOMA) program. It updates the 1980 publication: Bibliography for the Coastal Circulation of the Eastern North Pacific. In addition, mesoscale ocean modeling references related to the California Current System have been included. Originator-supplied keywords include: California Current, Ocean modeling, Mesoscale eddies, and Physical oceanography.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
This bibliography has been prepared for use in the Ocean Prediction Through Observation, Modeling and Analysis (OPTOMA) program. It updates the 1980 publication: Bibliography for the Coastal Circulation of the Eastern North Pacific. In addition, mesoscale ocean modeling references related to the California Current System have been included. Originator-supplied keywords include: California Current, Ocean modeling, Mesoscale eddies, and Physical oceanography.
Author:
Publisher:
ISBN:
Category : Ocean engineering
Languages : en
Pages : 332
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Book Description
Author: Christopher D. Miller
Publisher:
ISBN:
Category : Ocean circulation
Languages : en
Pages : 46
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Book Description
Author: Nathalí Cordero Quirós
Publisher:
ISBN:
Category :
Languages : en
Pages : 97
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Book Description
The California Current System (CCS) is one of the most productive regions in the whole world, and as such, one of the most studied as well. Observational records throughout the years have shown scientists that CCS is under the influence of major climate events such as El Niño Southern Oscillation (ENSO). Yet there are still many questions regarding the exact mechanisms trough which ENSO teleconnections imprint variability in the physical conditions of the CCS, and how this further impacts the California Current Ecosystem (CCE). The focus of this dissertation is to shed light over the regional expressions of ENSO over the CCS, and how physical-biogeochemical interactions drive a coherent response associated with El Niño and La Niña events. The first part describes the response of the CCS to ENSO as captured by one coarse resolution model and one eddy-resolving high-resolution model. The findings help to better understand the mechanistic response of the CCS to ENSO and build on the existing framework for ecosystem predictability. A key result from the first part is that the cooling of the CCS associated with La Niña is more consistent than the warming associated with El Niño. Also, with the high-resolution model we are able to show the bottom-up response of the CCE, and the diversity in the response among different trophic groups. The last part focuses on proposing new avenues for future research to untangle the intricate components of the CCE response that are associated with mesoscale activity, and how they are affected by ENSO variability.
Author: Joseph R. Donato
Publisher:
ISBN: 9781423555384
Category :
Languages : en
Pages : 78
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Book Description
The high resolution DIECAST ocean model, with improved physics, is used to simulate the annual cycle of mesoscale variability in the California coastal region. Model improvements include reduced numerical dispersion, an annual cycle of climatological wind stress forcing enhanced in magnitude near the coastal headlands, and barotropic and baroclinic boundary inflows and outflows. A six year simulation produced results in general agreement with recent observations of the annual cycle in the California Current although the gradients of sea surface temperature and dynamic height are generally stronger, and show more structure than observed. The stronger gradients indicate increased coastal upwelling and produced faster geostrophic currents than observed. A region of maximum Eddy Kinetic Energy (EKE), originally formed in the upper ocean over the continental slope in late spring, migrates westward on a seasonal timescale consistent in magnitude and phase with observations. At the same, the EKE spreads vertically into the deep ocean, decreasing the surface EKE west of about 126 deg W. This result clearly identifies a non-dissipative process that can account for the pronounced decrease of EKE west of 126 deg W recently documented in the literature. Deficiencies in the simulation include some artificial influences from the incompletely open western boundary, an exaggerated response of the surface circulation to the Mendocino escarpment and the absence of a significant poleward surface current along the coast in winter.
Author: Helmut Z. Baumert
Publisher: Cambridge University Press
ISBN: 9780521837897
Category : Science
Languages : en
Pages : 664
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Book Description
This book gives a comprehensive overview of marine turbulence and mixing for students, scientists, engineers.
Author: Shu-Tang Liu
Publisher: Springer Nature
ISBN: 9811618399
Category : Technology & Engineering
Languages : en
Pages : 258
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Book Description
This book focuses on universal nonlinear dynamics model of mesoscale eddies. The results of this book are not only the direct-type applications of pure mathematical limit cycle theory and fractal theory in practice but also the classic combination of nonlinear dynamic systems in mathematics and the physical oceanography. The universal model and experimental verification not only verify the relevant results that are obtained by Euler's form but also, more importantly, are consistent with observational numerical statistics. Due to the universality of the model, the consequences of the system are richer and more complete. The comprehensive and systematic mathematical modeling of mesoscale eddies is one of the major features of the book, which is particularly suited for readers who are interested to learn fractal analysis and prediction in physical oceanography. The book benefits researchers, engineers, and graduate students in the fields of mesoscale eddies, fractal, chaos, and other applications, etc.
