The Role of Upstream Lakes in Determining Downstream Severe Lake -Effect Snowstorms PDF Download
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Languages : en
Pages :
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Author: Bruce L. Rose
Publisher:
ISBN:
Category :
Languages : en
Pages : 366
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Category :
Languages : en
Pages :
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![Severe Lake-effect Snowstorms Over the Great Lakes [microform]: a Climatological, Numerical and Forecasting Approach (Ontario) PDF](https://books.google.com/books/content/images/frontcover/QytNngEACAAJ?fife=w80-h100)
Author: Liu, Anthony Qi
Publisher: Library and Archives Canada = Bibliothèque et Archives Canada
ISBN: 9780494078075
Category : Physics Theses
Languages : en
Pages : 274
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Book Description
Lake-effect snowstorms are an important source of severe weather over the Great Lakes region, which typically occur as the cold and dry arctic air flows over the warm lakes after the passage of a synoptic-scale low-pressure system. The intense transfer of heat and moisture can trigger atmospheric convection that is typically organized into long quasi-two-dimensional features known as cloud streets, roll clouds or lake-effect snowbands. This type of cloud also occurs over the high-latitude ocean during cold air breaks. In this study, through developing a climatology of lake-effect snowstorms over Southern Ontario for the period 1992-99, we identify the distinguishing characteristics of the synoptic-scale environment associated with intense lake-effect snowstorms. We also find that the track of a low-pressure system can have a significant impact on the development or lack thereof of lake-effect snowstorms over southern Ontario. A cloud-resolving atmosphere model is employed to simulate the development of cloud streets over the Labrador Sea. The simulations were initialized and validated using observations during a cold air outbreak over the Labrador Sea. The model was able to reproduce the observed downstream evolution of the roll clouds, which indicates that the model can successfully capture the secondary flow associated with the roll clouds that results in significant differences in the temperature, humidity and momentum fields between the updrafts and downdrafts. After that, numerical simulations are employed to investigate the influence of synoptic-scale atmospheric conditions and ice concentrations on roll cloud development. The results indicate that the development of lake-effect snowstorms is significantly modified by the upstream airflow conditions including stability, humidity, air-lake, temperature difference and wind speed etc. The results also show that the sea-ice zone has a significant impact on the atmospheric boundary layer development, which can be seen in both the evolution of the cloud field and the development of heat and moisture transfer patterns. Finally through simulating an observed lake-effect snowstorm event, we demonstrate that future forecasting of such high impact weather systems with a high-resolution cloud-resolving model.
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Category : Dissertations, Academic
Languages : en
Pages : 818
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Author: Jennifer J. Johnson
Publisher:
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Category : Great Lakes (North America)
Languages : en
Pages : 176
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Author: Greg Eugene Mann
Publisher:
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Category :
Languages : en
Pages : 642
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Author: Paul Markowski
Publisher: John Wiley & Sons
ISBN: 1119966671
Category : Science
Languages : en
Pages : 435
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Book Description
Mesoscale Meteorology in Mid-Latitudes presents the dynamics of mesoscale meteorological phenomena in a highly accessible, student-friendly manner. The book's clear mathematical treatments are complemented by high-quality photographs and illustrations. Comprehensive coverage of subjects including boundary layer mesoscale phenomena, orographic phenomena and deep convection is brought together with the latest developments in the field to provide an invaluable resource for mesoscale meteorology students. Mesoscale Meteorology in Mid-Latitudes functions as a comprehensive, easy-to-use undergraduate textbook while also providing a useful reference for graduate students, research scientists and weather industry professionals. Illustrated in full colour throughout Covers the latest developments and research in the field Comprehensive coverage of deep convection and its initiation Uses real life examples of phenomena taken from broad geographical areas to demonstrate the practical aspects of the science
Author: National Research Council
Publisher: National Academies Press
ISBN: 9780309045346
Category : Technology & Engineering
Languages : en
Pages : 580
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Book Description
Aldo Leopold, father of the "land ethic," once said, "The time has come for science to busy itself with the earth itself. The first step is to reconstruct a sample of what we had to begin with." The concept he expressedâ€"restorationâ€"is defined in this comprehensive new volume that examines the prospects for repairing the damage society has done to the nation's aquatic resources: lakes, rivers and streams, and wetlands. Restoration of Aquatic Ecosystems outlines a national strategy for aquatic restoration, with practical recommendations, and features case studies of aquatic restoration activities around the country. The committee examines: Key concepts and techniques used in restoration. Common factors in successful restoration efforts. Threats to the health of the nation's aquatic ecosystems. Approaches to evaluation before, during, and after a restoration project. The emerging specialties of restoration and landscape ecology.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309105242
Category : Science
Languages : en
Pages : 222
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Book Description
Recent studies of past climate and streamflow conditions have broadened understanding of long-term water availability in the Colorado River, revealing many periods when streamflow was lower than at any time in the past 100 years of recorded flows. That information, along with two important trends-a rapid increase in urban populations in the West and significant climate warming in the region-will require that water managers prepare for possible reductions in water supplies that cannot be fully averted through traditional means. Colorado River Basin Water Management assesses existing scientific information, including temperature and streamflow records, tree-ring based reconstructions, and climate model projections, and how it relates to Colorado River water supplies and demands, water management, and drought preparedness. The book concludes that successful adjustments to new conditions will entail strong and sustained cooperation among the seven Colorado River basin states and recommends conducting a comprehensive basinwide study of urban water practices that can be used to help improve planning for future droughts and water shortages.
Author: Karl M. Wantzen
Publisher: Springer Science & Business Media
ISBN: 1402091923
Category : Technology & Engineering
Languages : en
Pages : 184
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Book Description
Most aquatic ecosystems have variable water levels. These water-level fluctuations (WLF) have multiple effects on the organisms above and below the waterline. Natural WLF patterns in lakes guarantee both productivity and biodiversity, while untimely floods and droughts may have negative effects. Human impacts on WLF have led to a stabilization of the water levels of many lakes by hydraulic regulation, untimely drawdown due to water use, or floods due to water release from hydropower plants in the catchments. This book provides a first review in this field. It presents selected papers on the ecological effects of WLF in lakes, resulting from a workshop at the University of Konstanz in winter 2005. Issues addressed here include the extent of WLF, and analyses of their effects on different groups of biota from microorganisms to vertebrates. Applied issues include recommendations for the hydrological management of regulated lakes to reduce negative impacts, and a conceptual framework is delivered by an extension of the floodpulse concept for lakes. Current impacts on water use, including increasing demands on drinking and irrigation water, hydropower etc., and climate change effects on WLF make this book an essential resource for aquatic ecologists, engineers, and decision-makers dealing with the management of lake ecosystems and their catchments.
