Download or read book Interhemispheric Climate Linkages written by Vera Markgraf and published by Elsevier. This book was released on 2001-01-25 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a novel approach in the field of global change by presenting a comprehensive analysis of interhemispheric linkages of climate, present and past, and their effects on human societies. The ultimate goal of this interhemispheric integration is to improve our understanding of causes and mechanisms of climate change to enhance our capability in predicting future changes. Given the societal interest in global change issues this book offers a new approach for the integration of global information. It will provide a reference for professional scientists, researchers and graduate students in the fields of climatology, and the earth and environmental sciences. - Chapters analyse instrumental atmospheric and oceanic data to address such phenomena as El Nino/Southern Oscillation variability and other climate anomalies such as the Pacific and North Atlantic Oscillation and polar air outbreaks - A new systematic methodology is presented that allows objective and verifiable reconstruction of climate fields from sparse data - Especially valuable in the context of climate proxy data

Download or read book Interhemispheric climate links revealed by a late glacial cooling episode in southern Chile written by P.I. MORENO and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Changing Interhemispheric Temperature Difference written by Andrew Ronald Friedman and published by . This book was released on 2014 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The surface temperature difference between the northern and southern hemispheres is the simplest climate change indicator following global mean temperature, and reveals unique information about the state of the global climate, in particular regarding tropical atmospheric circulation and rainfall. This dissertation examines the historical behavior, future projections, and tropical hydrologic impacts of this interhemispheric (north-south) temperature difference. Historically, most of the variability in the interhemispheric temperature difference is from the northern hemisphere. Investigation of specific-forcing simulations shows that globally uniform radiative forcing from well-mixed greenhouse gases causes asymmetric northern warming due to the hemispheric land-ocean contrast and Arctic amplification. However, sulfate aerosols, which were disproportionately emitted in the northern hemisphere, caused cooling that masked the northern warming until the mid 1970s. Air pollution regulations in North America and Europe combined with sustained emissions of greenhouse gases have resulted in a positive trend in the interhemispheric temperature difference in the past few decades. Future simulations of phases 3 and 5 of the Coupled Model Intercomparison Project (CMIP3 and CMIP5) project that this recent asymmetric northern hemispheric warming will continue in the 21st century. The projected increase is well outside the range of historical variability in both moderate and business-as-usual scenarios. There is also a projected multimodel mean northward shift in the Hadley circulation and tropical rainfall, though the multimodel spread is much larger than for temperature. A prominent feature in the interhemispheric temperature record is an abrupt decrease around 1970, which was most pronounced in sea surface temperature (SST). Examination of the shift using surface and subsurface ocean datasets reveals that there were pronounced cooling and freshening at depth in the subpolar North Atlantic north of 50°N, which coincided with opposing warming and salting in the western mid-latitude North Atlantic between 35° and 45°N. These combined features cannot be completely accounted for by atmospheric forcing alone. Rather, they point to a discrete subpolar North Atlantic freshening known as the Great Salinity Anomaly and the corresponding weakening of the North Atlantic thermohaline circulation as causes of the 1970 interhemispheric shift. Spatially, the strongest surface temperature correlations with the interhemispheric SST difference are found in the extratropical North Atlantic and southern hemisphere oceans, which are key regions for the shift around 1970. Additionally, the correlations with low-latitude rainfall and the flow of major rivers are examined. Positive rainfall correlations are found in tropical North Africa, South and Southeast Asia; and negative correlations are found in Australia, southern and eastern South America, and northern Mexico. Among the rivers examined, the Niger, which flows through the Sahel, is most strongly correlated with the interhemispheric SST difference. The Indus is also significantly positively correlated, while the Mississippi and Parana are significantly negatively correlated. Based on this assessment, these regions are likely to experience impacts in response to future variations in the interhemispheric temperature difference from the extratropical Atlantic and southern hemisphere oceans, such as from the meridional overturning circulation or aerosol forcing.

Download or read book Tropical temperature variations since 20 000 years ago written by Thomas P. Guilderson and published by . This book was released on 1994 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Decade to Century Scale Climate Variability and Change written by National Research Council and published by National Academies Press. This book was released on 1998-12-24 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Society today may be more vulnerable to global-scale, long-term, climate change than ever before. Even without any human influence, past records show that climate can be expected to continue to undergo considerable change over decades to centuries. Measures for adaption and mitigation will call for policy decisions based on a sound scientific foundation. Better understanding and prediction of climate variations can be achieved most efficiently through a nationally recognized "dec-cen" science plan. This book articulates the scientific issues that must be addressed to advance us efficiently toward that understanding and outlines the data collection and modeling needed.

Download or read book Interacting Climates of Ocean Basins written by Carlos R. Mechoso and published by Cambridge University Press. This book was released on 2020-11-26 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive review of interactions between the climates of different ocean basins and their key contributions to global climate variability and change. Providing essential theory and discussing outstanding examples as well as impacts on monsoons, it a useful resource for graduate students and researchers in the atmospheric and ocean sciences.

Download or read book Encyclopedia of Quaternary Science written by and published by Elsevier. This book was released on 2006-11-24 with total page 7184 pages. Available in PDF, EPUB and Kindle. Book excerpt: The quaternary sciences constitute a dynamic, multidisciplinary field of research that has been growing in scientific and societal importance in recent years. This branch of the Earth sciences links ancient prehistory to modern environments. Quaternary terrestrial sediments contain the fossil remains of existing species of flora and fauna, and their immediate predecessors. Quaternary science plays an integral part in such important issues for modern society as groundwater resources and contamination, sea level change, geologic hazards (earthquakes, volcanic eruptions, tsunamis), and soil erosion. With over 360 articles and 2,600 pages, many in full-color, the Encyclopedia of Quaternary Science provides broad ranging, up-to-date articles on all of the major topics in the field. Written by a team of leading experts and under the guidance of an international editorial board, the articles are at a level that allows undergraduate students to understand the material, while providing active researchers with the latest information in the field. Also available online via ScienceDirect (2006) – featuring extensive browsing, searching, and internal cross-referencing between articles in the work, plus dynamic linking to journal articles and abstract databases, making navigation flexible and easy. For more information, pricing options and availability visit www.info.sciencedirect.com. 360 individual articles written by prominent international authorities, encompassing all important aspects of quaternary science Each entry provides comprehensive, in-depth treatment of an overview topic and presented in a functional, clear and uniform layout Reference section provides guidence for further research on the topic Article text supported by full-color photos, drawings, tables, and other visual material Writing level is suited to both the expert and non-expert

Download or read book Past Climate Variability in South America and Surrounding Regions written by Francoise Vimeux and published by Springer Science & Business Media. This book was released on 2009-08-04 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: South America is a unique place where a number of past climate archives are ava- able from tropical to high latitude regions. It thus offers a unique opportunity to explore past climate variability along a latitudinal transect from the Equator to Polar regions and to study climate teleconnections. Most climate records from tropical and subtropical South America for the past 20,000 years have been interpreted as local responses to shift in the mean position and intensity of the InterTropical Conv- gence Zone due to tropical and extratropical forcings or to changes in the South American Summer Monsoon. Further South, the role of the Southern Hemisphere westerly winds on global climate has been highly investigated with both paleodata and coupled climate models. However the regional response over South America during the last 20,000 years is much more variable from place to place than pre- ously thought. The factors that govern the spatial patterns of variability on millennial scale resolution are still to be understood. The question of past natural rates and ranges of climate conditions over South America is therefore of special relevance in this context since today millions of people live under climates where any changes in monsoon rainfall can lead to catastrophic consequences.

Download or read book How Landscapes Change written by Gay A. Bradshaw and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: North and South America share similar human and ecological histories and, increasingly, economic and social linkages. As such, issues of ecosystem functions and disruptions form a common thread among these cultures. This volume synthesizes the perspectives of several disciplines, such as ecology, anthropology, economy, and conservation biology. The chief goal is to gain an understanding of how human and ecological processes interact to affect ecosystem functions and species in the Americas. Throughout the text the emphasis is placed on habitat fragmentation. At the same time, the book provides an overview of current theory, methods, and approaches used in the analysis of ecosystem disruptions and fragmentation.

Download or read book International Conference on Isotopes and Environmental Studies written by Pavel P. Povinec and published by Elsevier. This book was released on 2006-03-08 with total page 661 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contents of the book are assembled from selected papers presented during the International Conference on Isotopes in Environmental Studies – AQUATIC FORUM 2004 convened in Monaco from 25 to 29 October 2004, which was the most important gathering of the year of isotope environmental scientists. The book reviews the present state of the art isotopic methods for better understanding of key processes in the aquatic environment, responsible for its future development and its protection. The main highlights include the latest developments in the study of the behaviour, transport and distribution of isotopes in the aquatic environment, recent climate change records using isotopic tracers in the environment, global isotopic oceanic studies, new trends in radioecological investigations and modelling, impact of groundwater-seawater interactions on coastal zones, groundwater dynamics and modelling, important for management of freshwater resources, development of new isotopic techniques, such as AMS, RIMS and ICPMS, and their applications in environmental studies, new trends in radiometrics underground techniques, new in situ radiometrics technologies and many other exciting topics which were presented and discussed during the Conference. The proceedings constitute an important contribution to the environmental isotopic research. In publishing this book the aim is to make the use of isotopes more widespread in the environmental disciplines and to further stimulate work in this exciting field. - Presents selected papers from the International Conference on Isotopes in Environmental Studies - AQUATIC FORUM 2004 - Addresses state-of-the-art isotopic methods for better understanding of key processes in the aquatic environment - Aims to make the use of isotopes more widespread in the environmental disciplines and to further stimulate work in this exciting field

Download or read book Management of Water Resources in Protected Areas written by Hermes Farfán González and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural ecosystems are heavily dependent on water, as it is essential to the development of life. The ecology and landscape play an important role in the quality and availability of water. It is no coincidence that exceptional hydrological phenomena are found in protected areas. Such is the case with, for example, the geothermic occurrences (principally, geysers) in America's Yellowstone National Park , the oldest park in the world. The Ramsar wetlands (where the ecosystem’s dependency on water is strongly evident), The Iguaçu Falls (on the border of Argentina and Brazil), or the Zapata Swamp (the largest of its kind on the Caribbean island of Cuba) further exemplify this point. However, in many cases, the conservation strategies for hydraulic resources in protected areas are ignored, or simply deprived of the attention they require. There are many types of suitable management strategies for planning and protecting our valuable treasures. Hydraulic resource management in protected areas is something that must not be separated from these conservation measures. The first Symposium for the Management of Hydraulic Resources in Protected Areas was intended to be a framework of communication about experiences with water resource management in protected areas. Advances in research and possible solutions to the problems within these areas were discussed. The contributions in this proceedings volume are grouped under seven main themes: Purification and reuse of wastewater in rural communities; Impact of public use on water resources; Vulnerability and risks associated with aquifers, Design and management water resources in protected areas; Research and monitoring of water resources in protected areas; Water and its importance as a source of renewable energy in protected spaces; and Geodiversity and conservation of areas with hydraulic heritage.

Download or read book Fire and Climatic Change in Temperate Ecosystems of the Western Americas written by Thomas T. Veblen and published by Springer Science & Business Media. This book was released on 2006-05-10 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Both fire and climatic variability have monumental impacts on the dynamics of temperate ecosystems. These impacts can sometimes be extreme or devastating as seen in recent El Nino/La Nina cycles and in uncontrolled fire occurrences. This volume brings together research conducted in western North and South America, areas of a great deal of collaborative work on the influence of people and climate change on fire regimes. In order to give perspective to patterns of change over time, it emphasizes the integration of paleoecological studies with studies of modern ecosystems. Data from a range of spatial scales, from individual plants to communities and ecosystems to landscape and regional levels, are included. Contributions come from fire ecology, paleoecology, biogeography, paleoclimatology, landscape and ecosystem ecology, ecological modeling, forest management, plant community ecology and plant morphology. The book gives a synthetic overview of methods, data and simulation models for evaluating fire regime processes in forests, shrublands and woodlands and assembles case studies of fire, climate and land use histories. The unique approach of this book gives researchers the benefits of a north-south comparison as well as the integration of paleoecological histories, current ecosystem dynamics and modeling of future changes.

Download or read book Paleoclimate Global Change and the Future written by Keith D. Alverson and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a synthesis of the past decade of research into global changes that occurred in the earth system in the past. Focus is achieved by concentrating on those changes in the Earth's past environment that best inform our evaluation of current and future global changes and their consequences for human populations. The book stands as a ten year milestone in the operation of the Past Global Changes (PAGES) Project of the International Geosphere-Biosphere Programme (IGBP). It seeks to provide a quantitative understanding of the Earth’s environment in the geologically recent past and to define the envelope of natural environmental variability against which anthropogenic impacts on the Earth System may be assessed. A set of color overhead transparencies based on the figures in the book is available free on the PAGES website (www.pages-igbp.org) for use in teaching and lecturing.

Download or read book Global Change in the Holocene written by John Birks and published by Routledge. This book was released on 2014-02-24 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Holocene spans the 11,500 years since the end of the last Ice Age and has been a period of major global environmental change. However the rate of change has accelerated during the last hundred years, due largely to human impacts and this has led to a growing concern for the future of our environmental resources. Global Change in the Holocene demonstrates how reconstructing the record of past environmental change can provide us with essential knowledge about how our environment works and presents the reader with an informed viewpoint from which to project realistic future scenarios. The book brings together key techniques that are widely used in Holocene research, such as radiocarbon dating, dendrochronology and sediment analysis and offers a comprehensive analysis of various archives of environmental change including instrumental and documentary records, corals, lake sediments, glaciers and ice cores. This reference will be an informative and cutting-edge resource for all researchers in the fields of climate change, environmental science, geography, palaeoecology and archaeology.

Download or read book Climate Conflict written by Jeffrey Mazo and published by Routledge. This book was released on 2010-10-18 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combining historical precedents with current thinking on state stability, internal conflict and state failure suggests that overcoming cultural, social, political and economic barriers to successful adaptation to a changing climate is the most important factor in avoiding instability in a warming world. The countries which will face increased risk are not necessarily the most fragile, nor those which will suffer the greatest physical effects of climate change.

Download or read book Arizona Water Policy written by Bonnie G. Colby and published by Routledge. This book was released on 2010-09-30 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: The central challenge for Arizona and many other arid regions in the world is keeping a sustainable water supply in the face of rapid population growth and other competing demands. This book highlights new approaches that Arizona has pioneered for managing its water needs. The state has burgeoning urban areas, large agricultural regions, water dependent habitats for endangered fish and wildlife, and a growing demand for water-based recreation. A multi-year drought and climate-related variability in water supply complicate the intense competition for water. Written by well-known Arizona water experts, the essays in this book address these issues from academic, professional, and policy perspectives that include economics, climatology, law, and engineering. Among the innovations explored in the book is Arizona‘s Groundwater Management Act. Arizona is not alone in its challenges. As one of the seven states in the Colorado River Basin that depend heavily on the river, Arizona must cooperate, and sometimes compete, with other state, tribal, and federal governments. One institution that furthers regional cooperation is the water bank, which encourages groundwater recharge of surplus surface water during wet years so that the water remains available during dry years. The Groundwater Management Act imposes conservation requirements and establishes planning and investment programs in renewable water supplies. The essays in Arizona Water Policy are accessible to a broad policy-oriented and nonacademic readership. The book explores Arizona‘s water management and extracts lessons that are important for arid and semi-arid areas worldwide.

Download or read book Past Climate Variability through Europe and Africa written by Richard W. Battarbee and published by Springer Science & Business Media. This book was released on 2007-11-06 with total page 653 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on two complementary time-scales, the Holocene (approximately the last 11,500 years) and the last glacial-interglacial cycle (approximately the last 130,000 years) to synthesize evidence of climate variability at the regional and continental scale across Europe and Africa. This is the first examination of historical climate variations at such a scale, and thus sets a benchmark for future research.