The Influence Of Cloud Feedbacks On Climate Variability And Change

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The Influence of Cloud Feedbacks on Climate Variability and Change

Author : Katinka Bellomo
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (12 download)

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Book Synopsis The Influence of Cloud Feedbacks on Climate Variability and Change by : Katinka Bellomo

Download or read book The Influence of Cloud Feedbacks on Climate Variability and Change written by Katinka Bellomo and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the greatest challenges in projections of future climate change is narrowing the uncertainty in the magnitude and sign of cloud feedback. The main limitations are that cloud processes need to be parameterized in climate models, and long-term observations of cloud cover are limited. In this dissertation we address this problem by studying the interplay of cloud feedbacks with atmospheric circulation and Sea Surface Temperature (SST). We first investigate the response of clouds to external radiative forcing by examining changes in cloud cover and their radiative impact in multiple and independent surface and satellite cloud cover datasets. Observed changes in cloud cover and estimated cloud amount feedback from 1954 to 2008 over the Indo-Pacific Ocean are found to be consistent in sign but significantly smaller in amplitude than changes simulated by an ensemble of historical simulations in the Coupled Model Intercomparison Project Phase 5 (CMIP5) archive over the same period of time. However, climate models are capable of simulating changes in cloud cover of the same strength and pattern as observed, when they are forced with a greater increase in SST. This suggests that observed changes in cloud cover are at least in part forced by anthropogenic emissions. It remains unclear whether observations exhibit unrealistically large trends in cloud cover, or clouds are not sensitive enough to changes in surface temperature in climate models. However, climate models underestimate changes in cloud cover also on shorter and better constrained timescales. The implications of underestimating the strength of a positive cloud feedback is explored using idealized model experiments in the context of internal climate variability. It is found that a positive feedback among cloud cover, SST, and large-scale atmospheric circulation over the subtropical stratocumulus regions affects basin-wide pattern and persistence of SST anomalies in both the Atlantic and Pacific Oceans. Collectively, these findings suggest that climate models underestimate the impacts of cloud feedbacks on the persistence of regional and global SST anomalies, thus potentially underestimating climate sensitivity to future climate change.

Understanding Climate Change Feedbacks

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309090725
Total Pages : 167 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Understanding Climate Change Feedbacks by : National Research Council

Download or read book Understanding Climate Change Feedbacks written by National Research Council and published by National Academies Press. This book was released on 2004-01-02 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past decade, scientists have learned much about the complex natural processes that influence climate variability and change, and our ability to model climate has increased significantly. We also have begun to better identify those parts of the climate system that are particularly important and not well understood and that therefore limit our ability to project the future evolution of Earth's climate. One of these critical areas is our understanding of the role of feedbacks in the climate system and their role in determining climate sensitivity. Feedbacks are processes in the climate system that can either amplify or dampen the system's response to changed forcings. This study looks at what is known and not known about climate change feedbacks and seeks to identify the feedback processes most in need of improved understanding. It identifies key observations needed to monitor and understand climate feedbacks, discusses ways to evaluate progress in understanding climate feedbacks, recommends ways to improve climate modeling and analysis for climate feedbacks research, and identifies priority areas for research.

Thriving on Our Changing Planet

Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
ISBN 13 : 0309467578
Total Pages : 717 pages
Book Rating : 4.3/5 (94 download)

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Book Synopsis Thriving on Our Changing Planet by : National Academies of Sciences, Engineering, and Medicine

Download or read book Thriving on Our Changing Planet written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2019-01-20 with total page 717 pages. Available in PDF, EPUB and Kindle. Book excerpt: We live on a dynamic Earth shaped by both natural processes and the impacts of humans on their environment. It is in our collective interest to observe and understand our planet, and to predict future behavior to the extent possible, in order to effectively manage resources, successfully respond to threats from natural and human-induced environmental change, and capitalize on the opportunities â€" social, economic, security, and more â€" that such knowledge can bring. By continuously monitoring and exploring Earth, developing a deep understanding of its evolving behavior, and characterizing the processes that shape and reshape the environment in which we live, we not only advance knowledge and basic discovery about our planet, but we further develop the foundation upon which benefits to society are built. Thriving on Our Changing Planet presents prioritized science, applications, and observations, along with related strategic and programmatic guidance, to support the U.S. civil space Earth observation program over the coming decade.

Observing and Modeling Earth's Energy Flows

Author : Lennart Bengtsson
Publisher : Springer
ISBN 13 : 9789400743267
Total Pages : 0 pages
Book Rating : 4.7/5 (432 download)

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Book Synopsis Observing and Modeling Earth's Energy Flows by : Lennart Bengtsson

Download or read book Observing and Modeling Earth's Energy Flows written by Lennart Bengtsson and published by Springer. This book was released on 2012-09-07 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive presentation of Earth’s energy flows and their consequences for the climate. The Earth’s climate as well as planetary climates in general, are broadly controlled by three fundamental parameters: the solar irradiance, the planetary albedo and the planetary emissivity. Space measurements indicate that these three quantities are remarkably stable. A minor decrease in planetary emissivity is consistent with theoretical calculations. This is due to the ongoing increase of atmospheric greenhouse gases making the atmosphere more opaque to long wave terrestrial radiation. As a consequence radiation processes are slightly out of balance as less heat is leaving the Earth in the form of thermal radiation than the incoming amount of heat from the sun. Present space-based systems cannot yet satisfactorily measure this imbalance, but the effect can be inferred from the measurements of the increase of heat in the oceans. Minor amounts of heat are also used to melt ice and to warm the atmosphere and the surface of the Earth. The book brings to fore the complexity of feedback processes of the Earth’s climate system and in particular the way clouds and aerosols affect the energy balance both directly and indirectly through feed-back loops driven by the dynamics of atmospheric, ocean and land surface processes. The book highlights recent scientific progress as well as remaining challenges. Previously published in Surveys in Geophysics, Volume 33, Nos. 3-4, 2012

Decade-to-Century-Scale Climate Variability and Change

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309060982
Total Pages : 161 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Decade-to-Century-Scale Climate Variability and Change by : National Research Council

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.

Climate Change

Author : The Royal Society
Publisher : National Academies Press
ISBN 13 : 0309302021
Total Pages : 74 pages
Book Rating : 4.3/5 (93 download)

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Book Synopsis Climate Change by : The Royal Society

Download or read book Climate Change written by The Royal Society and published by National Academies Press. This book was released on 2014-02-26 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climate Change: Evidence and Causes is a jointly produced publication of The US National Academy of Sciences and The Royal Society. Written by a UK-US team of leading climate scientists and reviewed by climate scientists and others, the publication is intended as a brief, readable reference document for decision makers, policy makers, educators, and other individuals seeking authoritative information on the some of the questions that continue to be asked. Climate Change makes clear what is well-established and where understanding is still developing. It echoes and builds upon the long history of climate-related work from both national academies, as well as on the newest climate-change assessment from the United Nations' Intergovernmental Panel on Climate Change. It touches on current areas of active debate and ongoing research, such as the link between ocean heat content and the rate of warming.

Global Environmental Change

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309174325
Total Pages : 621 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Global Environmental Change by : National Research Council

Download or read book Global Environmental Change written by National Research Council and published by National Academies Press. This book was released on 1999-09-14 with total page 621 pages. Available in PDF, EPUB and Kindle. Book excerpt: How can we understand and rise to the environmental challenges of global change? One clear answer is to understand the science of global change, not solely in terms of the processes that control changes in climate and the composition of the atmosphere, but in how ecosystems and human society interact with these changes. In the last two decades of the twentieth century, a number of such research effortsâ€"supported by computer and satellite technologyâ€"have been launched. Yet many opportunities for integration remain unexploited, and many fundamental questions remain about the earth's capacity to support a growing human population. This volume encourages a renewed commitment to understanding global change and sets a direction for research in the decade ahead. Through case studies the book explores what can be learned from the lessons of the past 20 years and what are the outstanding scientific questions. Highlights include: Research imperatives and strategies for investigators in the areas of atmospheric chemistry, climate, ecosystem studies, and human dimensions of global change. The context of climate change, including lessons to be gleaned from paleoclimatology. Human responses toâ€"and forcing ofâ€"projected global change. This book offers a comprehensive overview of global change research to date and provides a framework for answering urgent questions.

Frontiers of Climate Modeling

Author : J. T. Kiehl
Publisher : Cambridge University Press
ISBN 13 : 9781139453233
Total Pages : 410 pages
Book Rating : 4.4/5 (532 download)

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Book Synopsis Frontiers of Climate Modeling by : J. T. Kiehl

Download or read book Frontiers of Climate Modeling written by J. T. Kiehl and published by Cambridge University Press. This book was released on 2011-06-30 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physics and dynamics of the atmosphere and atmosphere-ocean interactions provide the foundation of modern climate models, upon which our understanding of the chemistry and biology of ocean and land surface processes are built. Originally published in 2006, Frontiers of Climate Modeling captures developments in modeling the atmosphere, and their implications for our understanding of climate change, whether due to natural or anthropogenic causes. Emphasis is on elucidating how greenhouse gases and aerosols are altering the radiative forcing of the climate system and the sensitivity of the system to such perturbations. An expert team of authors address key aspects of the atmospheric greenhouse effect, clouds, aerosols, atmospheric radiative transfer, deep convection dynamics, large scale ocean dynamics, stratosphere-troposphere interactions, and coupled ocean-atmosphere model development. The book is an important reference for researchers and advanced students interested in the forces driving the climate system and how they are modeled by climate scientists.

Clouds and Their Climatic Impact

Author : Sylvia C. Sullivan
Publisher : John Wiley & Sons
ISBN 13 : 1119700345
Total Pages : 371 pages
Book Rating : 4.1/5 (197 download)

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Book Synopsis Clouds and Their Climatic Impact by : Sylvia C. Sullivan

Download or read book Clouds and Their Climatic Impact written by Sylvia C. Sullivan and published by John Wiley & Sons. This book was released on 2023-12-11 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clouds and Their Climatic Impacts Clouds are an influential and complex element of Earth’s climate system. They evolve rapidly in time and exist over small spatial scales, but also affect global radiative balance and large-scale circulations. With more powerful models and extensive observations now at our disposal, the climate impact of clouds is receiving ever more research attention. Clouds and Their Climatic Impacts: Radiation, Circulation, and Precipitation presents an overview of our current understanding on various types of clouds and cloud systems and their multifaceted role in the radiative budget, circulation patterns, and rainfall. Volume highlights include: Interactions of aerosol with both liquid and ice clouds Surface and atmospheric cloud radiative feedbacks and effects Arctic, extratropical, and tropical clouds Cloud-circulation coupling at global, meso, and micro scales Precipitation efficiency, phase, and measurements The role of machine learning in understanding clouds and climate 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.

Climate Change Science

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309183359
Total Pages : 41 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Climate Change Science by : National Research Council

Download or read book Climate Change Science written by National Research Council and published by National Academies Press. This book was released on 2001-06-28 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: The warming of the Earth has been the subject of intense debate and concern for many scientists, policy-makers, and citizens for at least the past decade. Climate Change Science: An Analysis of Some Key Questions, a new report by a committee of the National Research Council, characterizes the global warming trend over the last 100 years, and examines what may be in store for the 21st century and the extent to which warming may be attributable to human activity.

Observed and Modeled Cloud Responses to Climate Variability

Author : Andrew V. Geiss
Publisher :
ISBN 13 :
Total Pages : 194 pages
Book Rating : 4.:/5 (119 download)

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Book Synopsis Observed and Modeled Cloud Responses to Climate Variability by : Andrew V. Geiss

Download or read book Observed and Modeled Cloud Responses to Climate Variability written by Andrew V. Geiss and published by . This book was released on 2020 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clouds play a significant role in the Earth's climate, yet cloud feedbacks remain one of the largest sources of inter-model spread in climate predictions. Studying how clouds respond to internal modes of climate variability can improve our understanding of how cloud varies on monthly to inter-annual time scales, improve our understanding of how clouds and cloud feedbacks might respond in a changing climate, and provide a validation metric for climate models. This study uses several satellite cloud datasets to identify interactions between cloud occurrence and various modes of climate variability in the historical record using a combination of linear regression and cluster analysis, including an in-depth examination of interactions between marine stratus cloud and wintertime sea surface temperature reemergence. These results are then used to evaluate cloud occurrence and monthly to annual cloud variability in historical simulations from several climate models. Implications for climate modeling are discussed. Finally, a new technique is developed to cluster unique meteorological and cloud regimes using a deep convolutional neural network.

Radiative Forcing of Climate Change

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309133505
Total Pages : 222 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Radiative Forcing of Climate Change by : National Research Council

Download or read book Radiative Forcing of Climate Change written by National Research Council and published by National Academies Press. This book was released on 2005-03-25 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Changes in climate are driven by natural and human-induced perturbations of the Earth's energy balance. These climate drivers or "forcings" include variations in greenhouse gases, aerosols, land use, and the amount of energy Earth receives from the Sun. Although climate throughout Earth's history has varied from "snowball" conditions with global ice cover to "hothouse" conditions when glaciers all but disappeared, the climate over the past 10,000 years has been remarkably stable and favorable to human civilization. Increasing evidence points to a large human impact on global climate over the past century. The report reviews current knowledge of climate forcings and recommends critical research needed to improve understanding. Whereas emphasis to date has been on how these climate forcings affect global mean temperature, the report finds that regional variation and climate impacts other than temperature deserve increased attention.

Policy Implications of Greenhouse Warming

Author : National Academy of Engineering
Publisher : National Academies Press
ISBN 13 : 0309043867
Total Pages : 945 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Policy Implications of Greenhouse Warming by : National Academy of Engineering

Download or read book Policy Implications of Greenhouse Warming written by National Academy of Engineering and published by National Academies Press. This book was released on 1992-02-01 with total page 945 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global warming continues to gain importance on the international agenda and calls for action are heightening. Yet, there is still controversy over what must be done and what is needed to proceed. Policy Implications of Greenhouse Warming describes the information necessary to make decisions about global warming resulting from atmospheric releases of radiatively active trace gases. The conclusions and recommendations include some unexpected results. The distinguished authoring committee provides specific advice for U.S. policy and addresses the need for an international response to potential greenhouse warming. It offers a realistic view of gaps in the scientific understanding of greenhouse warming and how much effort and expense might be required to produce definitive answers. The book presents methods for assessing options to reduce emissions of greenhouse gases into the atmosphere, offset emissions, and assist humans and unmanaged systems of plants and animals to adjust to the consequences of global warming.

Our Changing Planet

Author : Climate Change Science Program (U.S.)
Publisher :
ISBN 13 :
Total Pages : 226 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Our Changing Planet by : Climate Change Science Program (U.S.)

Download or read book Our Changing Planet written by Climate Change Science Program (U.S.) and published by . This book was released on 2006 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Shallow Clouds, Water Vapor, Circulation, and Climate Sensitivity

Author : Robert Pincus
Publisher : Springer
ISBN 13 : 3319772732
Total Pages : 396 pages
Book Rating : 4.3/5 (197 download)

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Book Synopsis Shallow Clouds, Water Vapor, Circulation, and Climate Sensitivity by : Robert Pincus

Download or read book Shallow Clouds, Water Vapor, Circulation, and Climate Sensitivity written by Robert Pincus and published by Springer. This book was released on 2018-05-29 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents a series of overview articles arising from a workshop exploring the links among shallow clouds, water vapor, circulation, and climate sensitivity. It provides a state-of-the art synthesis of understanding about the coupling of clouds and water vapor to the large-scale circulation. The emphasis is on two phenomena, namely the self-aggregation of deep convection and interactions between low clouds and the large-scale environment, with direct links to the sensitivity of climate to radiative perturbations. Each subject is approached using simulations, observations, and synthesizing theory; particular attention is paid to opportunities offered by new remote-sensing technologies, some still prospective. The collection provides a thorough grounding in topics representing one of the World Climate Research Program’s Grand Challenges. Previously published in Surveys in Geophysics, Volume 38, Issue 6, 2017 The aritcles “Observing Convective Aggregation”, “An Observational View of Relationships Between Moisture Aggregation, Cloud, and Radiative Heating Profiles”, “Implications of Warm Rain in Shallow Cumulus and Congestus Clouds for Large-Scale Circulations”, “A Survey of Precipitation-Induced Atmospheric Cold Pools over Oceans and Their Interactions with the Larger-Scale Environment”, “Low-Cloud Feedbacks from Cloud-Controlling Factors: A Review”, “Mechanisms and Model Diversity of Trade-Wind Shallow Cumulus Cloud Feedbacks: A Review”, “Structure and Dynamical Influence of Water Vapor in the Lower Tropical Troposphere”, “Emerging Technologies and Synergies for Airborne and Space-Based Measurements of Water Vapor Profiles”, “Observational Constraints on Cloud Feedbacks: The Role of Active Satellite Sensors”, and “EUREC4A: A Field Campaign to Elucidate the Couplings Between Clouds, Convection and Circulation” are available as open access articles under a CC BY 4.0 license at link.springer.com.

Coupled Ocean-atmosphere Models

Author : Jacques C. J. Nihoul
Publisher : Elsevier Publishing Company
ISBN 13 :
Total Pages : 800 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Coupled Ocean-atmosphere Models by : Jacques C. J. Nihoul

Download or read book Coupled Ocean-atmosphere Models written by Jacques C. J. Nihoul and published by Elsevier Publishing Company. This book was released on 1985 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: The exchange of momentum, heat, moisture, gases (such as CO 2 and O 2 ) 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."

Radiative Forcing of Climate Change

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309095069
Total Pages : 223 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Radiative Forcing of Climate Change by : National Research Council

Download or read book Radiative Forcing of Climate Change written by National Research Council and published by National Academies Press. This book was released on 2005-04-25 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: Changes in climate are driven by natural and human-induced perturbations of the Earth's energy balance. These climate drivers or "forcings" include variations in greenhouse gases, aerosols, land use, and the amount of energy Earth receives from the Sun. Although climate throughout Earth's history has varied from "snowball" conditions with global ice cover to "hothouse" conditions when glaciers all but disappeared, the climate over the past 10,000 years has been remarkably stable and favorable to human civilization. Increasing evidence points to a large human impact on global climate over the past century. The report reviews current knowledge of climate forcings and recommends critical research needed to improve understanding. Whereas emphasis to date has been on how these climate forcings affect global mean temperature, the report finds that regional variation and climate impacts other than temperature deserve increased attention.