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Seasonal And Low Frequency Variability In The Meridional Heat Flux At 36n In The North Atlantic
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Book Synopsis Seasonal and Low Frequency Variability in the Meridional Heat Flux at 36N̊ in the North Atlantic by : Olga T. Sato
Download or read book Seasonal and Low Frequency Variability in the Meridional Heat Flux at 36N̊ in the North Atlantic written by Olga T. Sato and published by . This book was released on 1997 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Low Frequency Variability of Meridional Heat Transport in the North Atlantic and Its Response on the El Nino (Southern Oscillation) Events by : L. V. Nechvolodov
Download or read book Low Frequency Variability of Meridional Heat Transport in the North Atlantic and Its Response on the El Nino (Southern Oscillation) Events written by L. V. Nechvolodov and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Meridional Heat Flux Variability at 26.5°N in the North Atlantic Ocean by : Eve R. Fillenbaum
Download or read book Meridional Heat Flux Variability at 26.5°N in the North Atlantic Ocean written by Eve R. Fillenbaum and published by . This book was released on 1994 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Nature of the Decadal Variability of Surface Climate Over the North Atlantic Ocean by : Feng He
Download or read book The Nature of the Decadal Variability of Surface Climate Over the North Atlantic Ocean written by Feng He and published by . This book was released on 2008 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Variability of Large-scale Ocean Circulation and Meridional Heat Transport in the Atlantic Ocean by : Jinting Zhang
Download or read book Variability of Large-scale Ocean Circulation and Meridional Heat Transport in the Atlantic Ocean written by Jinting Zhang and published by . This book was released on 2015 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research described in the dissertation addresses what controls the variability of ocean circulation and meridional heat transport (MHT) in the Atlantic Ocean on different timescales. Chapter 2 focuses on the contribution of surface heating and wind forcing with/without topography to the seasonal and interannual-to-decadal variations of large-scale sea surface height (SSH) using simplified models. On the seasonal timescale thermosteric height explains most of the SSH variance north of 18°N and first mode linear long Rossby wave explains the SSH between 10°N-15°N and east of Greenland. On interannual-to-decadal timescales, a topographic Sverdrup response explains interannual-to-decadal SSH between 53°N and 63°N east of Greenland, suggesting the important role of topography in the subpolar region. Farther south, the linear Rossby wave model explains SSH variations on interannual-to-decadal timescales between 30°N and 50°N from mid-basin to the eastern boundary. In Chapter 3, perturbation experiments and a 1000-year control simulation in the GFDL coupled model CM2.1 are used to investigate the evolution of the Atlantic meridional overturning circulation (AMOC) and its related upper ocean heat content (UOHC) on the decadal timescale. A slow southward propagation of positive AMOC anomaly in northern high latitudes leads to a convergence (divergence) of the Atlantic MHT anomaly in the subpolar (Gulf Stream) region, thus warming (cooling) in the subpolar (Gulf Stream) region after several years. The study presented in Chapter 4 examines the coherence structure of the interannual MHT variability in the Atlantic tropics and subtropics using seven simulations in the CMIP5 (Coupled Model Intercomparison Project Phase 5) archive as well as a hindcast simulation in the isopycnal ocean model GOLD (Generalized Ocean Layered Dynamics) from 1971 to 2009. The spatial pattern for the leading mode of the interannual MHT anomaly from all the model simulations has the same sign from 20°S-30°N, with a peak near the equator. Ekman heat transport anomalies between 7°S-20°N and the geostrophic transport beneath the Ekman layer from 13°S-27°N (except the equator) contribute to this MHT leading mode, while the contribution of the deep ocean is negligible. The connection between the hemispheres results from diapycnal transport of the northward geostrophic transport beneath the Ekman layer in the southern tropics; after this water reaches the upper ocean, it then moves northward where Ekman transport takes over. The wind is the main external forcing for the MHT coherence structure. The work in this thesis enhances the understanding of the contributions of heating, winds and topography on sea level changes on seasonal and interannual-to-decadal timescales, as well as the decadal and interannual variability of the AMOC and MHT in the Atlantic Ocean. It could be used to understand the effect of topography on the ocean circulation in the high latitude, improve the decadal prediction of the UOHC in the North Atlantic Ocean, and advance the knowledge of the tropical Atlantic heat transport and ocean-atmosphere coupling system.
Book Synopsis The Impact of Seasonal Forcing on the Variability of the Meridional Heat Flux at 30S Using a Sigma-coordinate Primitive Equation Model by : B. Barnier
Download or read book The Impact of Seasonal Forcing on the Variability of the Meridional Heat Flux at 30S Using a Sigma-coordinate Primitive Equation Model written by B. Barnier and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Inverse Modeling of Seasonal Variations in the North Atlantic Ocean by : Lisan Yu
Download or read book Inverse Modeling of Seasonal Variations in the North Atlantic Ocean written by Lisan Yu and published by . This book was released on 1998 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Mechanisms of Low-frequency Variability in Tropical Convective Activity and the Madden and Julian Oscillation by : Charles Jones
Download or read book On the Mechanisms of Low-frequency Variability in Tropical Convective Activity and the Madden and Julian Oscillation written by Charles Jones and published by . This book was released on 1994 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Subannual, Seasonal, and Interannual Variability of the North Atlantic Meridional Overturning Circulation by : Joel J.-M. Hirschi
Download or read book Subannual, Seasonal, and Interannual Variability of the North Atlantic Meridional Overturning Circulation written by Joel J.-M. Hirschi and published by . This book was released on 2007 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dominant Patterns of Interannual Variability in the North Atlantic by : Farhana Nahed
Download or read book Dominant Patterns of Interannual Variability in the North Atlantic written by Farhana Nahed and published by . This book was released on 2007 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Variability of the Ocean Circulation in the North-Atlantic in Response to Atmospheric Weather Regimes by : Nicolas Barrier
Download or read book Variability of the Ocean Circulation in the North-Atlantic in Response to Atmospheric Weather Regimes written by Nicolas Barrier and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of the PhD is to investigate the impacts of the large-Scale atmospheric variability on the North- Atlantic ocean circulation. This question has already been addressed in a large number of studies, in which the atmospheric variability is decomposed into modes of variability, determined by decomposing sea-Level pressure anomalies into Empirical Orthogonal Function (EOFs). These modes of variability are the North-Atlantic Oscillation (NAO), the East-Atlantic Pattern (EAP) and the Scandinavian Pattern (SCAN). EOF decomposition assumes that the modes are orthogonal and symmetric. The latter assumption, however, has been shown to be inadequate for the NAO. Hence, a different framework is used in this study to assess the atmospheric variability, the so-Called weather regimes. These are large-Scale, recurrent and quasi-Stationary atmospheric patterns that have been shown to capture well the interannual and decadal variability of atmospheric forcing to the ocean. Furthermore, they allow to separate the spatial patterns of the positive and negative NAO phases. Hence, these weather regimes are a promising alternative to modes of variability in the study of the ocean response to atmospheric variability. Using observations and numerical models (realistic or in idealised settings), we have shown that the Atlantic Ridge (AR), NAO- and NAO+ regimes drive a fast (monthly to interannual) wind-Driven response of the subtropical and subpolar gyres (topographic Sverdrup balance) and of the meridional overturning circulation (MOC, driven by Ekman transport anomalies). At decadal timescales, the subpolar gyre strengthens for persistent NAO+ and Scandinavian Blocking (BLK) conditions via baroclinic adjustment to buoyancy fluxes and slackens for persistent AR conditions via baroclinic adjustment to wind-Stress curl anomalies. The latter mechanism also accounts for the strengthening of the subtropical gyre for persistent NAO+ conditions and its weakening for persistent AR conditions. The gyres response to persistent NAO- conditions reflects the southward shift of the gyre system (the intergyre gyre). The MOC spins-Up for persistent NAO+ and BLK conditions via increased deep water formation in the Labrador Sea, and conversely for the NAO- and AR regimes. Last, heat budget calculations in the subpolar gyre and the Nordic Seas have been performed using four global ocean hindcasts. The winter averaged heat convergence in the western subpolar gyre is positively correlated with the NAO- winter occurrences, which is due to the intergyregyre circulation, while it is negatively correlated with AR winter occurrences, because of the wind-Driven reduction of both gyres. Downward surface heat flux anomalies are negatively correlated with NAO+ occurrences, and conversely for the NAO-. In the Nordic Seas, they are positively correlated with BLK and to a lesser extent AR occurrences. Furthermore, we suggest that the heat content variability in the western subpolar gyre is the signature of the delayed response (6-Year lag) to the time-Integrated NAO+ forcing, due to the combination of the immediate (0-Lag) response of surface heat flux and the lagged (3 year lag) response of ocean heat convergence.
Book Synopsis Low-frequency Temperature and Salinity Variability in the Northern North Atlantic by : G. Reverdin
Download or read book Low-frequency Temperature and Salinity Variability in the Northern North Atlantic written by G. Reverdin and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Influence of Sea Surface Temperature Anomalies on Low-frequency Variability of the North Atlantic Oscillation by : Julia V. Manganello
Download or read book The Influence of Sea Surface Temperature Anomalies on Low-frequency Variability of the North Atlantic Oscillation written by Julia V. Manganello and published by . This book was released on 2005 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Temperature Variations in the North Atlantic Ocean and in the Atmosphere by : Bjørn Helland-Hansen
Download or read book Temperature Variations in the North Atlantic Ocean and in the Atmosphere written by Bjørn Helland-Hansen and published by . This book was released on 1920 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seasonal and Interannual Heat Content Variability in the Subtropical North Atlantic by : Maike Julie Petersen Sonnewald
Download or read book Seasonal and Interannual Heat Content Variability in the Subtropical North Atlantic written by Maike Julie Petersen Sonnewald and published by . This book was released on 2010 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Climate Atlas of the Atlantic Ocean by : Ralf Lindau
Download or read book Climate Atlas of the Atlantic Ocean written by Ralf Lindau and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: The presented climate atlas follows with regard to structure and vol ume the Bunker Climate Atlas of the North Atlantic Ocean published 1985 by H.-J. Isemer and L. Hasse, which has become a standard work for the climate study community. A new edition was appropriate, since during the last decade much progress was achieved in the correct interpretation of the wind speed reported by merchant ships. As the wind speed is an essential parameter for the fundamental air-sea interactions, namely the exchange of momentum and energy between ocean and atmosphere, considerable impact on resulting climate key parameters as Sverdrup transport or meridional heat transport could be expected. Furthermore, individual ship observations are nowadays available from COADS, the Comprehensive Ocean Atmosphere Data Set, and, due to the grown computer power, these data are processable in reasonable time. Thus, improving the calculations of air-sea fluxes, as performed by Isemer and Hasse, is no longer a complex and tricky venture, since flux parameterizations can be applied directly to the ship observations. Compared to the Bunker Altas we expanded the considered sea area and included also the South Atlantic. Considering the entire Atlantic Ocean reveals not only interesting features of the southern hemisphere but allows also a finer assessment of the resulting energy fluxes.
Book Synopsis The North Atlantic and the Middle East by : Heidi Cullen
Download or read book The North Atlantic and the Middle East written by Heidi Cullen and published by . This book was released on 2000 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
