Numerical Methods for Least Squares Problems

Numerical Methods for Least Squares Problems
Author: Ake Bjorck
Publisher: SIAM
Total Pages: 425
Release: 1996-01-01
Genre: Mathematics
ISBN: 9781611971484

The method of least squares was discovered by Gauss in 1795. It has since become the principal tool to reduce the influence of errors when fitting models to given observations. Today, applications of least squares arise in a great number of scientific areas, such as statistics, geodetics, signal processing, and control. In the last 20 years there has been a great increase in the capacity for automatic data capturing and computing. Least squares problems of large size are now routinely solved. Tremendous progress has been made in numerical methods for least squares problems, in particular for generalized and modified least squares problems and direct and iterative methods for sparse problems. Until now there has not been a monograph that covers the full spectrum of relevant problems and methods in least squares. This volume gives an in-depth treatment of topics such as methods for sparse least squares problems, iterative methods, modified least squares, weighted problems, and constrained and regularized problems. The more than 800 references provide a comprehensive survey of the available literature on the subject.

Abrupt Climate Change

Abrupt Climate Change
Author: National Research Council
Publisher: National Academies Press
Total Pages: 252
Release: 2002-04-23
Genre: Science
ISBN: 0309133041

The climate record for the past 100,000 years clearly indicates that the climate system has undergone periodic-and often extreme-shifts, sometimes in as little as a decade or less. The causes of abrupt climate changes have not been clearly established, but the triggering of events is likely to be the result of multiple natural processes. Abrupt climate changes of the magnitude seen in the past would have far-reaching implications for human society and ecosystems, including major impacts on energy consumption and water supply demands. Could such a change happen again? Are human activities exacerbating the likelihood of abrupt climate change? What are the potential societal consequences of such a change? Abrupt Climate Change: Inevitable Surprises looks at the current scientific evidence and theoretical understanding to describe what is currently known about abrupt climate change, including patterns and magnitudes, mechanisms, and probability of occurrence. It identifies critical knowledge gaps concerning the potential for future abrupt changes, including those aspects of change most important to society and economies, and outlines a research strategy to close those gaps. Based on the best and most current research available, this book surveys the history of climate change and makes a series of specific recommendations for the future.

The Mechanical Properties of Sea Ice

The Mechanical Properties of Sea Ice
Author: W. F. Weeks
Publisher:
Total Pages: 100
Release: 1967
Genre: Ice mechanics
ISBN:

The review discusses the state of thinking of each of the main national groups investigating sea ice and gives an overall appraisal of the field as a whole. Emphasis is placed on (1) the physical basis for interpreting sea ice strength (phase relations, air volume, and structural considerations), (2) theoretical considerations (strength models, air bubbles and salt reinforcement, and interrelations between growth conditions and strength), (3) experimental results (tensile, flexural, shear, and compressive strength, elastic modulus, shear modulus and Poisson's ratio, time dependent effects, and creep), and (4) plate characteristics. The paper includes a review of problems in sea ice investigations, relates the chemical, crystallographic, mechanical, and physical aspects involved, and concludes by showing how to utilize this knowledge to solve practical problems. (Author).

Snow and Ice-Related Hazards, Risks, and Disasters

Snow and Ice-Related Hazards, Risks, and Disasters
Author:
Publisher: Academic Press
Total Pages: 787
Release: 2014-10-27
Genre: Nature
ISBN: 0123964733

Snow and Ice-Related Hazards, Risks, and Disasters provides you with the latest scientific developments in glacier surges and melting, ice shelf collapses, paleo-climate reconstruction, sea level rise, climate change implications, causality, impacts, preparedness, and mitigation. It takes a geo-scientific approach to the topic while also covering current thinking about directly related social scientific issues that can adversely affect ecosystems and global economies. Puts the contributions from expert oceanographers, geologists, geophysicists, environmental scientists, and climatologists selected by a world-renowned editorial board in your hands Presents the latest research on causality, glacial surges, ice-shelf collapses, sea level rise, climate change implications, and more Numerous tables, maps, diagrams, illustrations and photographs of hazardous processes will be included Features new insights into the implications of climate change on increased melting, collapsing, flooding, methane emissions, and sea level rise

Arctic Ice Shelves and Ice Islands

Arctic Ice Shelves and Ice Islands
Author: Luke Copland
Publisher: Springer
Total Pages: 426
Release: 2017-05-30
Genre: Science
ISBN: 9402411011

This book provides an overview of the current state of knowledge of Arctic ice shelves, ice islands and related features. Ice shelves are permanent areas of ice which float on the ocean surface while attached to the coast, and typically occur in very cold environments where perennial sea ice builds up to great thickness, and/or where glaciers flow off the land and are preserved on the ocean surface. These landscape features are relatively poorly studied in the Arctic, yet they are potentially highly sensitive indicators of climate change because they respond to changes in atmospheric, oceanic and glaciological conditions. Recent fracturing and breakup events of ice shelves in the Canadian High Arctic have attracted significant scientific and public attention, and produced large ice islands which may pose a risk to Arctic shipping and offshore infrastructure. Much has been published about Antarctic ice shelves, but to date there has not been a dedicated book about Arctic ice shelves or ice islands. This book fills that gap.

The Climate of the Arctic

The Climate of the Arctic
Author: Rajmund Przybylak
Publisher: Springer Science & Business Media
Total Pages: 275
Release: 2013-04-17
Genre: Science
ISBN: 9401703795

th Towards the end of the 19 century some researchers put forward the hypothesis that the Polar regions may play the key role in the shaping of the global climate. This supposition found its full confirmation in empirical and th model research conducted in the 20 century, particularly in recent decades. The intensification of the global warming after about 1975 brought into focus the physical causes of this phenomenon. The first climatic models created at that time, and the analyses of long observation series consistently showed that the Polar regions are the most sensitive to climatic changes. This aroused the interest of numerous researchers, who thought that the examination of the proc esses taking place in these regions might help to determine the mechanisms responsible for the "working" of the global climatic system. To date, a great number of publications on this issue have been published. However, as a re view of the literature shows, there is not a single monograph which comprises the basic information concerning the current state of the Arctic climate. The last study to discuss the climate of the Arctic in any depth was published in 1970 (Climates a/the Polar Regions, vol. 14, ed. S. Orvig) by the World Survey of Climatology, edited by H. E. Landsberg. This publication, however, does not provide the full climatic picture of many meteorological elements.

Arctic-Subarctic Ocean Fluxes

Arctic-Subarctic Ocean Fluxes
Author: Robert R. Dickson
Publisher: Springer Science & Business Media
Total Pages: 728
Release: 2008-03-03
Genre: Science
ISBN: 1402067747

We are only now beginning to understand the climatic impact of the remarkable events that are now occurring in subarctic waters. Researchers, however, have yet to agree upon a predictive model that links change in our northern seas to climate. This volume brings together the body of evidence needed to develop climate models that quantify the ocean exchanges through subarctic seas, measure their variability, and gauge their impact on climate.

A Compendium of Arctic Environmental Information

A Compendium of Arctic Environmental Information
Author:
Publisher:
Total Pages: 160
Release: 1986
Genre: Anti-submarine warfare
ISBN:

The presence, and apparently specialized nature, of Soviet submarines in the Arctic has encouraged the U.S. Navy to take a more active role in investigating the Arctic environment especially relevant to antisubmarine warfare. This report presents an abridgement of some of the knowledge of the Arctic environment relevant to specific disciplines and is a starting point for new investigators of Arctic phenomena pertinent to naval operations. Topics covered include: Sea ice; Arctic oceanography; General climatology; Comparison of U.S. --U.S.S.R. Arctic programs; Arctic acoustics; Submarines in the Arctic; Arctic remote sensing; Adapting to the environment; Logistics. Appendices summarize information about the Barents Sea, Beaufort Sea, Chukchi Sea, Kara Sea, Greenland Sea, Laptev Sea, Sea of Okhotsk, East Siberian Sea, Labrador Sea, Baffin Bay/Davis Strait, Bering Sea, Norwegian Sea, and the Central Arctic. A bibliography and a summary of the WMO sea ice classification are also provided.