Download or read book UN MODELE SIMPLIFIE DU SYSTEME OCEAN ATMOSPHERE written by IONELA.. ROTARU MUSAT and published by . This book was released on 1998 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: UN MODELE COUPLE SIMPLIFIE OCEAN DE SURFACE - ATMOSPHERE DEJA EXISTANT AU LMD A ETE ADAPTE ICI POUR FAIRE UN OUTIL STRICTEMENT COMPARABLE AU MODELE COUPLE GLOBAL DE L'IPSL. UNE ANALYSE COMPAREE DES SIMULATIONS CLIMATIQUES CONDUITES AVEC CES 2 MODELES COUPLES OCEAN-ATMOSPHERE PARALLELES, UTILISANT LE MEME MODELE D'ATMOSPHERE, MAIS DES MODELES D'OCEAN DE COMPLEXITE DIFFERENTES, NOUS A PERMIS DE METTRE EN EVIDENCE DES BIAIS SYSTEMATIQUES COMMUNS, QUI PAR AILLEURS SONT PRESENTS EGALEMENT DANS D'AUTRES MODELES CLIMATIQUES (KIEHL, 1998). IL S'AGIT D'UN REFROIDISSEMENT DU BASSIN PACIFIQUE TROPICAL OUEST ET D'UN ASSECHEMENT DU PACIFIQUE CENTRAL QUI S'ACCOMPAGNE DE LA PENETRATION D'UNE LANGUE D'EAU FROIDE DEPUIS L'EST DU BASSIN. CE BIAIS SE MARQUE AUSSI PAR UN REFROIDISSEMENT DE LA HAUTE TROPOSPHERE TROPICALE AU DESSUS DE 30\ S. AFIN DE DEGAGER LE ROLE DE L'ATMOSPHERE DANS LA DERIVE THERMIQUE TROPICALE DU CLIMAT SIMULE, NOUS AVONS FAIT DES EXPERIENCES DE SENSIBILITE DONT NOUS PENSONS QU'ELLES AFFECTENT NOTABLEMENT L'ENERGETIQUE DE LA HAUTE TROPOSPHERE. CES EXPERIENCES DE SENSIBILITE CONCERNENT : LES NUAGES HAUTS DE GLACE, LA REPRESENTATION DE LA CONVECTION ET LE TAUX D'OZONE DES HAUTES COUCHES ATMOSPHERIQUES. LES RESULTATS DE CES SIMULATIONS NOUS PERMETTENT DE SUGGERER QUE LA DERIVE THERMIQUE TROPICALE A LA SURFACE DE L'OCEAN EST CONTROLEE PAR UN DESEQUILIBRE ENERGETIQUE AU SOMMET DE L'ATMOSPHERE. LA TRANSMISSION DE CES BIAIS A LA SURFACE DE L'OCEAN EST ENSUITE FAITE PAR LES BRANCHES DE SUBSIDENCE DES CELLULES DE HADLEY-WALKER. CETTE ANALYSE DES RETROACTIONS ATMOSPHERIQUES EST COMPLETEE PAR UNE ETUDE DES TRANSPORTS ATMOSPHERIQUES D'ENERGIE (TAE). NOUS VALIDONS LES TAE SIMULES PAR LE MCGA DU LMD PAR RAPPORT AUX TRANSPORTS DERIVES DES REANALYSES DE L'ECMWF ET NOUS NOUS INTERESSONS ENSUITE A LA VARIATION DE CES TRANSPORTS DANS UN CHANGEMENT CLIMATIQUE. POUR LES DIFFERENTS TYPES D'ENERGIE, LA REPONSE DU TRANSPORT ATMOSPHERIQUE D'ENERGIE A UNE MODIFICATION PRESCRITE DES TEMPERATURES DE SURFACE DE L'OCEAN CORRESPONDANT A UN 2CO 2 EST DIRECTEMENT LIEE AU GRADIENT THERMIQUE EQUATEUR-TROPIQUES. CEPENDANT, LES VARIATIONS DES DIFFERENTS TERMES D'ENERGIE SE COMPENSENT PARTIELLEMENT AU NIVEAU DU TRANSPORT D'ENERGIE STATIQUE HUMIDE. L'ANALYSE EN TERME DE DIVERGENCE DU TRANSPORT ATMOSPHERIQUE D'ENERGIE PERMET DE QUANTIFIER L'IMPORTANCE DES RETROACTIONS DYNAMIQUES PAR RAPPORT AUX RETROACTIONS RADIATIVES. LE TRANSPORT D'ENERGIE STATIQUE HUMIDE VARIE DE 10-20 WM 2 ; CES VARIATIONS SONT DU MEME ORDRE DE GRANDEUR QUE LES VARIATIONS DES FLUX RADIATIFS INDUITES A LA TROPOPAUSE DANS UNE EXPERIENCE DE 2CO 2. PAR CONTRE, LES VARIATIONS AU NIVEAU DES DIFFERENTS TYPES D'ENERGIE SONT D'UN ORDRE DE GRANDEUR PLUS IMPORTANTES. ENFIN, NOUS MONTRONS QUE LA COMPOSANTE HYDROLOGIQUE DU TAE EST AFFECTEE PAR LA PARAMETRISATION DU PROCESSUS DE PRECIPITATIONS.
Download or read book Un mod le simplifi du syst me oc an atmosph re written by Ionela Rotaru-Musat and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Un modele couple simplifie ocean de surface - atmosphere deja existant au lmd a ete adapte ici pour faire un outil strictement comparable au modele couple global de l'ipsl. Une analyse comparee des simulations climatiques conduites avec ces 2 modeles couples ocean-atmosphere paralleles, utilisant le meme modele d'atmosphere, mais des modeles d'ocean de complexite differentes, nous a permis de mettre en evidence des biais systematiques communs, qui par ailleurs sont presents egalement dans d'autres modeles climatiques (kiehl, 1998). Il s'agit d'un refroidissement du bassin pacifique tropical ouest et d'un assechement du pacifique central qui s'accompagne de la penetration d'une langue d'eau froide depuis l'est du bassin. Ce biais se marque aussi par un refroidissement de la haute troposphere tropicale au dessus de 30\ s. Afin de degager le role de l'atmosphere dans la derive thermique tropicale du climat simule, nous avons fait des experiences de sensibilite dont nous pensons qu'elles affectent notablement l'energetique de la haute troposphere. Ces experiences de sensibilite concernent : les nuages hauts de glace, la representation de la convection et le taux d'ozone des hautes couches atmospheriques. Les resultats de ces simulations nous permettent de suggerer que la derive thermique tropicale a la surface de l'ocean est controlee par un desequilibre energetique au sommet de l'atmosphere. La transmission de ces biais a la surface de l'ocean est ensuite faite par les branches de subsidence des cellules de hadley-walker. Cette analyse des retroactions atmospheriques est completee par une etude des transports atmospheriques d'energie (tae). Nous validons les tae simules par le mcga du lmd par rapport aux transports derives des reanalyses de l'ecmwf et nous nous interessons ensuite a la variation de ces transports dans un changement climatique. Pour les differents types d'energie, la reponse du transport atmospherique d'energie a une modification prescrite des temperatures de surface de l'ocean correspondant a un 2co 2 est directement liee au gradient thermique equateur-tropiques. Cependant, les variations des differents termes d'energie se compensent partiellement au niveau du transport d'energie statique humide. L'analyse en terme de divergence du transport atmospherique d'energie permet de quantifier l'importance des retroactions dynamiques par rapport aux retroactions radiatives. Le transport d'energie statique humide varie de 10-20 wm 2 ; ces variations sont du meme ordre de grandeur que les variations des flux radiatifs induites a la tropopause dans une experience de 2co 2. Par contre, les variations au niveau des differents types d'energie sont d'un ordre de grandeur plus importantes. Enfin, nous montrons que la composante hydrologique du tae est affectee par la parametrisation du processus de precipitations.
Download or read book A Simple Model of Ocean atmosphere Interactions in the Topical Climate System written by Michael A. Kelly and published by . This book was released on 1999 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flexible Global Ocean Atmosphere Land System Model written by Tianjun Zhou and published by Springer Science & Business Media. This book was released on 2013-11-19 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coupled climate system models are of central importance for climate studies. A new model known as FGOALS ( the Flexible Global Ocean-Atmosphere-Land System model), has been developed by the Sate Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences (LASG/IAP, CAS), a first-tier national geophysical laboratory. It serves as a powerful tool, both for deepening our understanding of fundamental mechanisms of the climate system and for making decadal prediction and scenario projections of future climate change. "Flexible Global Ocean-Atmosphere-Land System Model: A Modeling Tool for the Climate Change Research Community” is the first book to offer systematic evaluations of this model’s performance. It is comprehensive in scope, covering both developmental and application-oriented aspects of this climate system model. It also provides an outlook of future development of FGOALS and offers an overview of how to employ the model. It represents a valuable reference work for researchers and professionals working within the related areas of climate variability and change. Prof. Tianjun Zhou, Yongqiang Yu, Yimin Liu and Bin Wang work at LASG, the Institute of Atmospheric Physics, Chinese Academy of Sciences, China.
Download or read book Coupled Ocean Atmosphere Models written by J.C.J. Nihoul and published by Elsevier. This book was released on 1985-07-01 with total page 793 pages. Available in PDF, EPUB and Kindle. Book excerpt: The exchange of momentum, heat, moisture, gases (such as CO2 and O2) and salt between the atmosphere and the ocean is a phenomenon of paramount importance for the dynamics of the atmosphere and the ocean. With the pressing need for reliable climate forecast (e.g. to deal with severe food and energy problems) interactive ocean-atmosphere models have become one of the main objectives of geophysical fluid dynamics. This volume provides the first state-of-the-art review of interactive ocean-atmosphere modelling and its application to climates. The papers are by active and eminent scientists from different countries and different disciplines. They provide a up-to-date survey of major recent discoveries and valuable recommendations for future research.
Download or read book A Simple Model of Ocean atmosphere Interactions in the Tropical Climate System written by Michael A. Kelly and published by . This book was released on 1998 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Simple Model for Ocean atmosphere Interaction at Midlatitudes written by Wenjie Weng and published by . This book was released on 1997 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atmosphere ocean Modeling Coupling And Couplers written by Carlos Roberto Mechoso and published by World Scientific. This book was released on 2021-07-27 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coupled atmosphere-ocean models are at the core of numerical climate models. There is an extraordinarily broad class of coupled atmosphere-ocean models ranging from sets of equations that can be solved analytically to highly detailed representations of Nature requiring the most advanced computers for execution. The models are applied to subjects including the conceptual understanding of Earth's climate, predictions that support human activities in a variable climate, and projections aimed to prepare society for climate change. The present book fills a void in the current literature by presenting a basic and yet rigorous treatment of how the models of the atmosphere and the ocean are put together into a coupled system. The text of the book is divided into chapters organized according to complexity of the components that are coupled. Two full chapters are dedicated to current efforts on the development of generalist couplers and coupling methodologies all over the world.
Download or read book A Low order Model of the Equatorial Ocean atmosphere System written by Roberto Legnani and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tropical Ocean atmosphere Newsletter written by and published by . This book was released on 1980 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamics of the Tropical Atmosphere and Oceans written by Peter J. Webster and published by John Wiley & Sons. This book was released on 2020-06-08 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a unique and comprehensive view of the fundamental dynamical and thermodynamic principles underlying the large circulations of the coupled ocean-atmosphere system Dynamics of The Tropical Atmosphere and Oceans provides a detailed description of macroscale tropical circulation systems such as the monsoon, the Hadley and Walker Circulations, El Niño, and the tropical ocean warm pool. These macroscale circulations interact with a myriad of higher frequency systems, ranging from convective cloud systems to migrating equatorial waves that attend the low-frequency background flow. Towards understanding and predicting these circulation systems. A comprehensive overview of the dynamics and thermodynamics of large-scale tropical atmosphere and oceans is presented using both a “reductionist” and “holistic” perspectives of the coupled tropical system. The reductionist perspective provides a detailed description of the individual elements of the ocean and atmospheric circulations. The physical nature of each component of the tropical circulation such as the Hadley and Walker circulations, the monsoon, the incursion of extratropical phenomena into the tropics, precipitation distributions, equatorial waves and disturbances described in detail. The holistic perspective provides a physical description of how the collection of the individual components produces the observed tropical weather and climate. How the collective tropical processes determine the tropical circulation and their role in global weather and climate is provided in a series of overlapping theoretical and modelling constructs. The structure of the book follows a graduated framework. Following a detailed description of tropical phenomenology, the reader is introduced to dynamical and thermodynamical constraints that guide the planetary climate and establish a critical role for the tropics. Equatorial wave theory is developed for simple and complex background flows, including the critical role played by moist processes. The manner in which the tropics and the extratropics interact is then described, followed by a discussion of the physics behind the subtropical and near-equatorial precipitation including arid regions. The El Niño phenomena and the monsoon circulations are discussed, including their covariance and predictability. Finally, the changing structure of the tropics is discussed in terms of the extent of the tropical ocean warm pool and its relationship to the intensity of global convection and climate change. Dynamics of the Tropical Atmosphere and Oceans is aimed at advanced undergraduate and early career graduate students. It also serves as an excellent general reference book for scientists interested in tropical circulations and their relationship with the broader climate system.
Download or read book Numerical Models of Oceans and Oceanic Processes written by Lakshmi H. Kantha and published by Elsevier. This book was released on 2000-08-08 with total page 981 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oceans play a pivotal role in our weather and climate. Ocean-borne commerce is vital to our increasingly close-knit global community. Yet we do not fully understand the intricate details of how they function, how they interact with the atmosphere, and what the limits are to their biological productivity and their tolerance to wastes. While satellites are helping us to fill in the gaps, numerical ocean models are playing an important role in increasing our ability to comprehend oceanic processes, monitor the current state of the oceans, and to a limited extent, even predict their future state.Numerical Models of Oceans and Oceanic Processes is a survey of the current state of knowledge in this field. It brings together a discussion of salient oceanic dynamics and processes, numerical solution methods, and ocean models to provide a comprehensive treatment of the topic. Starting with elementary concepts in ocean dynamics, it deals with equatorial, mid-latitude, high latitude, and coastal dynamics from the perspective of a modeler. A comprehensive and up-to-date chapter on tides is also included. This is followed by a discussion of different kinds of numerical ocean models and the pre- and post-processing requirements and techniques. Air-sea and ice-ocean coupled models are described, as well as data assimilation and nowcast/forecasts. Comprehensive appendices on wavelet transforms and empirical orthogonal functions are also included.This comprehensive and up-to-date survey of the field should be of interest to oceanographers, atmospheric scientists, and climatologists. While some prior knowledge of oceans and numerical modeling is helpful, the book includes an overview of enough elementary material so that along with its companion volume, Small Scale Processes in Geophysical Flows, it should be useful to both students new to the field and practicing professionals.* Comprehensive and up-to-date review* Useful for a two-semester (or one-semester on selected topics) graduate level course* Valuable reference on the topic* Essential for a better understanding of weather and climate
Download or read book A Simple Tropical Coupled Ocean atmosphere Model written by G. R. Budin and published by . This book was released on 1989 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Long lead Forecast Bulletin written by and published by . This book was released on 1994 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Climate Change 2007 The Physical Science Basis written by Intergovernmental Panel on Climate Change and published by Cambridge University Press. This book was released on 2007-09-10 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Climate Change 2007 volumes of the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC) provide the most comprehensive and balanced assessment of climate change available. This IPCC Working Group I report brings us completely up-to-date on the full range of scientific aspects of climate change. Written by the world's leading experts, the IPCC volumes will again prove to be invaluable for researchers, students, and policymakers, and will form the standard reference works for policy decisions for government and industry worldwide.
Download or read book Climate System Modeling written by Kevin E. Trenberth and published by Cambridge University Press. This book was released on 1992 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climate Systems Modeling presents an interdisciplinary and comprehensive study of the dynamics of the whole global system. As a comprehensive text it will appeal to students and researchers concerned with any aspect of climatology and the study of related topics in the broad earth and environmental sciences.
Download or read book IAP Global Ocean atmosphere land System Model written by Xuehong Zhang and published by . This book was released on 2000 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
