Relationships Between El Nino-southern Oscillation and the Arctic Oscillation :. PDF Download

Author: Y. P. Zhou
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author:
Publisher:
ISBN:
Category : Climatic changes
Languages : en
Pages :

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Book Description
Time series representing two of the climate systems' most leading variability in northern hemisphere, namely the El Nino-Southern Oscillation (ENSO) and the Arctic Oscillation (AO), together with 50 years of observed daily mean surface air temperature, precipitation over the conterminous United States, as well as circulation fields from NCEP/NCAR CDAS/Reanalysis are used to investigate the climate impact of ENSO and AO and their combined effects. Composites of ENSO only (El Nino, neutral, La Nina) phase, AO only (high, neutral, low) phase, and their nine combinations are constructed for US temperature, precipitation and the circulation fields for each 12 running season. The results show that both ENSO and AO have profound impact on US temperature and precipitation in winter. In general, the low index phase of AO resembles that of La Nina and high index phase of AO resembles El Nino. Therefore, during (C, AO- ) and (W, AO+), enhanced impact on temperature and precipitation anomalous field is expected. For example, while it is normally warmer and drier in the northern states, cooler and wetter in the southern states during El Nino years, the high index phase of AO provides much warmer winter for large areas of US from northern border to central and northeast than the low index phase of AO in the same phase of ENSO. The AO impact on precipitation is less well organized but the impact exists through out the year in the south and east coastal area, as well as the Tennessee and Ohio valley. These composites provide useful tools to support the 6-10 day, monthly and seasonal forecasts in the Climate Prediction Center.

Author: Michael J. McPhaden
Publisher: John Wiley & Sons
ISBN: 1119548128
Category : Science
Languages : en
Pages : 528

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Book Description
Comprehensive and up-to-date information on Earth’s most dominant year-to-year climate variation The El Niño Southern Oscillation (ENSO) in the Pacific Ocean has major worldwide social and economic consequences through its global scale effects on atmospheric and oceanic circulation, marine and terrestrial ecosystems, and other natural systems. Ongoing climate change is projected to significantly alter ENSO's dynamics and impacts. El Niño Southern Oscillation in a Changing Climate presents the latest theories, models, and observations, and explores the challenges of forecasting ENSO as the climate continues to change. Volume highlights include: Historical background on ENSO and its societal consequences Review of key El Niño (ENSO warm phase) and La Niña (ENSO cold phase) characteristics Mathematical description of the underlying physical processes that generate ENSO variations Conceptual framework for understanding ENSO changes on decadal and longer time scales, including the response to greenhouse gas forcing ENSO impacts on extreme ocean, weather, and climate events, including tropical cyclones, and how ENSO affects fisheries and the global carbon cycle Advances in modeling, paleo-reconstructions, and operational climate forecasting Future projections of ENSO and its impacts Factors influencing ENSO events, such as inter-basin climate interactions and volcanic eruptions The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals. Find out more about this book from this Q&A with the editors.

Author: Henry F. Diaz
Publisher: Cambridge University Press
ISBN: 9780521430425
Category : Science
Languages : en
Pages : 510

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Book Description
This 1993 book enhances our understanding of the mechanisms involved in the low frequency behavior of the El Nino/Southern Oscillation (ENSO) phenomenon.

Author: Thomas Cain
Publisher:
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Category :
Languages : en
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The El Nino Southern Oscillation (ENSO) has long been an influential climate and weather driver for many regions. Many studies have examined the variability of the phases of ENSO, leading to discovery of a separate mode of El Nino dubbed the El Nino Modoki, featuring a tripole Walker circulation. However, few studies have examined the variability of El Nino with Modoki separated from regular El Nino events. The goals of this study were to demonstrate that the El Nino signal was stronger separate from Modoki (thus leading to higher predictability), and to examine the effect of the Modoki on both a national and regional level, showing the connection between other teleconnections such as the Pacific North American teleconnection (PNA), the Arctic Oscillation (AO), and the North American Oscillation teleconnection (NAO). Using NCEP/NCAR composites, conventional El Nino events were found to have a stronger signal, with persistent features being easier to identify. Similarly, the Modoki showed a pattern that was similar but different to the regular El Nino. Using New York State for the area of regional analysis, all ENSO phases were found to modify the effect of the PNA, but the effect was different depending on location. Both of these results indicate that it is possible to generate a clearer picture of the impacts of ENSO by properly classifying these events.

Author: S.-Y. Simon Wang
Publisher: John Wiley & Sons
ISBN: 1119068037
Category : Science
Languages : en
Pages : 436

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Book Description
Although we are seeing more weather and climate extremes, individual extreme events are very diverse and generalization of trends is difficult. For example, mid-latitude and subtropical climate extremes such as heat waves, hurricanes and droughts have increased, and could have been caused by processes including arctic amplification, jet stream meandering, and tropical expansion. This volume documents various climate extreme events and associated changes that have been analyzed through diagnostics, modeling, and statistical approaches. The identification of patterns and mechanisms can aid the prediction of future extreme events. Volume highlights include: Compilation of processes and mechanisms unique to individual weather and climate extreme events Discussion of climate model performance in terms of simulating high-impact weather and climate extremes Summary of various existing theories, including controversial ones, on how climate extremes will continue to become stronger and more frequent Climate Extremes: Patterns and Mechanisms is a valuable resource for scientists and graduate students in the fields of geophysics, climate physics, natural hazards, and environmental science. Read an interview with the editors to find out more: https://eos.org/editors-vox/how-does-changing-climate-bring-more-extreme-events

Author: Henry F. Diaz
Publisher: Cambridge University Press
ISBN: 9780521621380
Category : Nature
Languages : en
Pages : 518

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Book Description
The El Niño/Southern Oscillation (ENSO) phenomenon is a recurrent feature of the climate in tropical regions. In this volume leading experts summarize information gained over the past decade concerning diverse aspects of ENSO, which have led to marked improvements in our ability to forecast its development months or seasons in advance. This volume compares ENSO's modern morphology and variability with its recent historic and prehistoric behaviour. It expands and updates Diaz and Markgraf's earlier volume El Niño: Historical and Paleoclimatic Aspects of the Southern Oscillation (1992, Cambridge University Press). The volume will be of importance to a broad range of scientists in meteorology, oceanography, hydrology, geosciences, ecology, public health, emergency management response and mitigation, and decision-making. It will also be used as a supplementary textbook and reference source in graduate courses in environmental studies.

Author: Peter Nickolas
Publisher: Cambridge University Press
ISBN: 1316727939
Category : Mathematics
Languages : en
Pages : 275

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Book Description
This text offers an excellent introduction to the mathematical theory of wavelets for senior undergraduate students. Despite the fact that this theory is intrinsically advanced, the author's elementary approach makes it accessible at the undergraduate level. Beginning with thorough accounts of inner product spaces and Hilbert spaces, the book then shifts its focus to wavelets specifically, starting with the Haar wavelet, broadening to wavelets in general, and culminating in the construction of the Daubechies wavelets. All of this is done using only elementary methods, bypassing the use of the Fourier integral transform. Arguments using the Fourier transform are introduced in the final chapter, and this less elementary approach is used to outline a second and quite different construction of the Daubechies wavelets. The main text of the book is supplemented by more than 200 exercises ranging in difficulty and complexity.

Author: Henry F. Diaz
Publisher: Springer Science & Business Media
ISBN: 1402029438
Category : Science
Languages : en
Pages : 515

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Book Description
The book examines potentially important factors that may have affected the Hadley and Walker Circulations and evaluates changes in the Hadley Circulation and the monsoons as simulated by coupled models of past climate conditions, and predicted future conditions under an enhanced greenhouse effect. This book is meant to serve as a fundamental reference work for current and future researchers, graduate students in the atmospheric sciences and geosciences, and climate specialists involved in interdisciplinary research.

Author: Peter W. Glynn
Publisher: Springer
ISBN: 9401774994
Category : Science
Languages : en
Pages : 666

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Book Description
This book documents and examines the state of health of coral reefs in the eastern tropical Pacific region. It touches on the occurrence of coral reefs in the waters of surrounding countries, and it explores their biogeography, biodiversity and condition relative to the El Niño southern oscillation and human impacts. Additionally contained within is a field that presents information on many of the species presented in the preceding chapters.