Worldwide retreat of glaciers confirmed in unprecedented detail
Taking their name from the old Scottish term glim, meaning a passing look or glance, in 1994 a team of scientists began developing a world-wide initiative to study glaciers using satellite data. Now 20 years later, the international GLIMS (Global Land Ice Measurements from Space) initiative observes the world's glaciers primarily using data from optical satellite instruments such as ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) and Landsat.
More than 150 scientists from all over the world have contributed to the new book Global Land Ice Measurements from Space, the most comprehensive report to date on global glacier changes. While the shrinking of glaciers on all continents is already known from ground observations of individual glaciers, by using repeated satellite observations GLIMS has firmly established that glaciers are shrinking globally. Although some glaciers are maintaining their size, most glaciers are dwindling. The foremost cause of the worldwide reductions in glaciers is global warming, the team writes.
Full color throughout, the book has 25 regional chapters that illustrate glacier changes from the Arctic to the Antarctic. Other chapters provide a thorough theoretical background on glacier monitoring and mapping, remote sensing techniques, uncertainties, and interpretation of the observations in a climatic context. The book highlights many other glacier research applications of satellite data, including measurement of glacier thinning from repeated satellite-based digital elevation models (DEMs) and calculation of surface flow velocities from repeated satellite images.
These tools are key to understanding local and regional variations in glacier behavior, the team writes. The high sensitivity of glaciers to climate change has substantially decreased their volume and changed the landscape over the past decades, affecting both regional water availability and the hazard potential of glaciers. The growing GLIMS database about glaciers also contributed to the Intergovernmental Panel on Climate Change (IPCC)'s Fifth Assessment Report issued in 2013. The IPCC report concluded that most of the world's glaciers have been losing ice at an increasing rate in recent decades.
More than 60 institutions across the globe are involved in GLIMS. Jeffrey S. Kargel of the Department of Hydrology and Water Resources at the University of Arizona coordinates the project. The GLIMS glacier database and GLIMS web site are developed and maintained by the National Snow and Ice Data Center (NSIDC) at the University of Colorado in Boulder.
More information:
Global Land Ice Measurements from Space
Hardcover $279.00; £180.00; € 199,99
Springer and Praxis Publishing (2014) ISBN 978-3-540-79817-0
Also available as an eBook
Provided by Springer