Antarctic Cloud Radiative Forcing at the Surface Estimated from the ISCCP D1 and AVHRR Polar Pathfinder Data Sets, 1985-1993 PDF Download
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Author: Michael J. Pavolonis
Publisher:
ISBN:
Category :
Languages : en
Pages : 296
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Author: Michael J. Pavolonis
Publisher:
ISBN:
Category :
Languages : en
Pages : 296
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Book Description
Author: Joannès Berque
Publisher:
ISBN:
Category : Atmosphere
Languages : en
Pages : 436
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Book Description
A radiative transfer model of the Antarctic snow-atmosphere system was developed, as radiometric contrast between clouds and the snow hinders remote sensing of clouds and surface properties over the high ice sheets. The radiative effect of clouds at the top of the atmosphere was evaluated over the South Pole with ground-based lidar observations and data from NASA's Terra satellite.
Author: Chenghai Wang
Publisher: John Wiley & Sons
ISBN: 1119702658
Category : Science
Languages : en
Pages : 293
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Book Description
Climatology in Cold Regions A groundbreaking interdisciplinary study of cold-region weather systems and their vital role in predicting climate change across the globe Climatology in Cold Regions explores the complexities of land−atmospheric interaction across the Earth’s cryosphere, systematically placing soil thawing, snow melting, surface diabatic heating, and other processes within the context of broader climatological models. Drawing from a wealth of new data, leading atmospheric scientist Chenghai Wang illustrates how cold-region weather systems can be parameterized to improve seasonal climate prediction and provide crucial insights into projected changes in climate over the next 50-100 years. The book opens with an introduction to the characteristics and classification of cold-region climatology, followed by a detailed description of the primary weather systems and land surface processes in cold regions. The core of the book presents a new approach for seasonal climate prediction using signals obtained from cryospheric processes, supported by a discussion of climate disasters and the impact of climate change on the ecology of cold regions. Introduces a new way of modeling climate in cold regions Offers novel approaches for assessing climate signals from cold regions in seasonal and sub-seasonal predictions Presents new data on the role of cold-region climatology in forecasting and driving global temperature changes Discusses the role of cold regions as the main source of global freshwater supply A significant contribution to climate research and beyond, Climatology in Cold Regions is essential reading for students, scientists, and researchers in the atmospheric sciences, meteorology, ecology, hydrology, and Earth sciences.
Author:
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 714
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Author:
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 722
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Author: Allison McComiskey Payton
Publisher:
ISBN:
Category :
Languages : en
Pages : 412
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Author: Ryan Scott
Publisher:
ISBN:
Category :
Languages : en
Pages : 172
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Book Description
West Antarctica is experiencing rapid ice loss and complex regional climate change. This dissertation investigates how cloud properties and the large-scale atmospheric circulation influence surface heat exchange and melting on West Antarctic ice shelves and ice sheet margins using field measurements, satellite observations, and atmospheric reanalysis data. Surface-based shortwave spectral irradiance measurements and satellite data reveal strong orographic controls on West Antarctic cloud formation and ice-phase microphysics. Orographically-forced updrafts and waves favor rapid conversion of supercooled liquid water into ice, which efficiently attenuates incoming solar near-infrared energy. Frequent intrusions of marine air from the Amundsen Sea anchor a semipermanent cloud band over the West Antarctic Ice Sheet (WAIS) that continues downstream along the Transantarctic Mountain range. Cloud systems sampled downstream at Ross Island tend to be optically thin and radiatively dominated by ice water. In contrast, direct onshore flows of marine air from the Southern Ocean bring low clouds with enhanced liquid-phase spectral signatures. Radiative transfer calculations using vertically-resolved cloud data indicate that, owing to a dominance of longwave effects, clouds radiatively warm the surface of the WAIS in every month of the year. On annual average, cloud cover is estimated to warm the grounded ice-sheet by 34 Watts per square-meter. Thin low-level liquid-bearing clouds, which favor strong radiative heat input to the snow surface, are common during the summer melt season. Summer atmospheric warming in West Antarctica is favored by blocking activity over the Amundsen Sea and a negative phase of the Southern Annular Mode, which both correlate with El Niño conditions in the tropical Pacific Ocean. Extensive melt events on the Ross and Pacific-sector coastal ice shelves are linked to persistent, intense Amundsen Sea anticyclones, which force intrusions of marine air over the ice-sheet. Surface melting is driven by enhanced downwelling longwave radiation from clouds and a warm, moist atmosphere and by downward turbulent mixing of sensible heat by föhn winds. Since the late 1990s, concurrent with accelerating ocean-driven WAIS mass loss, summer surface melt occurrence has increased from the Pine Island and Thwaites Glacier systems to the eastern Ross Ice Shelf, linked to increasing anticyclonic marine influence and regional sea-ice loss.
Author: World Data Center A for Glaciology
Publisher:
ISBN:
Category :
Languages : en
Pages : 69
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Author: National Research Council
Publisher: National Academies Press
ISBN: 0309314852
Category : Science
Languages : en
Pages : 276
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Book Description
The growing problem of changing environmental conditions caused by climate destabilization is well recognized as one of the defining issues of our time. The root problem is greenhouse gas emissions, and the fundamental solution is curbing those emissions. Climate geoengineering has often been considered to be a "last-ditch" response to climate change, to be used only if climate change damage should produce extreme hardship. Although the likelihood of eventually needing to resort to these efforts grows with every year of inaction on emissions control, there is a lack of information on these ways of potentially intervening in the climate system. As one of a two-book report, this volume of Climate Intervention discusses albedo modification - changing the fraction of incoming solar radiation that reaches the surface. This approach would deliberately modify the energy budget of Earth to produce a cooling designed to compensate for some of the effects of warming associated with greenhouse gas increases. The prospect of large-scale albedo modification raises political and governance issues at national and global levels, as well as ethical concerns. Climate Intervention: Reflecting Sunlight to Cool Earth discusses some of the social, political, and legal issues surrounding these proposed techniques. It is far easier to modify Earth's albedo than to determine whether it should be done or what the consequences might be of such an action. One serious concern is that such an action could be unilaterally undertaken by a small nation or smaller entity for its own benefit without international sanction and regardless of international consequences. Transparency in discussing this subject is critical. In the spirit of that transparency, Climate Intervention: Reflecting Sunlight to Cool Earth was based on peer-reviewed literature and the judgments of the authoring committee; no new research was done as part of this study and all data and information used are from entirely open sources. By helping to bring light to this topic area, this book will help leaders to be far more knowledgeable about the consequences of albedo modification approaches before they face a decision whether or not to use them.
Author: J. C. King
Publisher: Cambridge University Press
ISBN: 9780521039840
Category : Science
Languages : en
Pages : 424
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Book Description
This book is a comprehensive survey of the climatology and meteorology of Antarctica. The first section of the book reviews the methods by which we can observe the Antarctic atmosphere and presents a synthesis of climatological measurements. In the second section, the authors consider the processes that maintain the observed climate, from large-scale atmospheric circulation to small-scale processes. The final section reviews our current knowledge of the variability of Antarctic climate and the possible effects of "greenhouse" warming. The authors stress links among the Antarctic atmosphere, other elements of the Antarctic climate system (oceans, sea ice and ice sheets), and the global climate system. This volume will be of greatest interest to meteorologists and climatologists with a specialized interest in Antarctica, but it will also appeal to researchers in Antarctic glaciology, oceanography and biology. Graduates and undergraduates studying physical geography, and the earth, atmospheric and environmental sciences will find much useful background material in the book.
