Reconstructing the Mass and Energy Balance of the Silvretta Glacier Using Tree Rings PDF Download
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Author: Lara Läubli
Publisher:
ISBN:
Category :
Languages : en
Pages : 94
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Book Description
Author: Lara Läubli
Publisher:
ISBN:
Category :
Languages : en
Pages : 94
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Book Description
Author: Kailey Marcinkowski
Publisher:
ISBN:
Category : Mass budget (Geophysics)
Languages : en
Pages : 55
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Book Description
Mountain hemlock growth chronologies were used to reconstruct the mass balance of South Cascade Glacier, an alpine glacier in the North Cascade Range of Washington State (USA). The net balance reconstruction spans 350 years, from 1659 to 2009. Summer and winter balances were also reconstructed for 1346-2009 and 1615-2009, respectively. Relationships between mass balance and winter precipitation, temperature, the Pacific Decadal Oscillation index, and the El Niño Southern Oscillation index suggest that these climatic variables and indices influence glacier balance fluctuations at various temporal scales. Periods of above-average net, summer, and winter mass balance occurred mainly in 1790-1800, 1810-1820, 1845-1860, 1865-1890, and 1970-1990. Above- and below-average reconstructed mass balances at South Cascade Glacier were concurrent with similar periods from other glacier balance reconstructions and moraine dates in the Pacific Northwest region of North America. Agreement among these records suggests that changes in South Cascade Glacier mass balance are good indicators of regional balance fluctuations, and glaciers in the Pacific Northwest are responding similarly to regional external climate forcings. The current rate of decline, from 2000 to 2009, in the reconstructed mass balance record has been faster than any other decline in a century. This decreasing trend is projected to continue in accordance with increasing temperatures, and will likely affect glacier-influenced water resources in the Pacific Northwest.
Author: Amanda M. Doremus
Publisher:
ISBN: 9780355252118
Category :
Languages : en
Pages : 45
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Book Description
A 243-year mass balance record was reconstructed for Easton Glacier at Mount Baker, Washington, USA, using annual ring-width measurements of mountain hemlock tree cores. Tree cores were collected on the lateral moraines of Easton Glacier and were measured and analyzed to create a site tree-ring chronology. The tree-ring chronology presented in this study responds to the same climatic forcings as glacier mass balance, mainly wintertime precipitation and summertime temperatures, providing validation for our linear regression model which uses the tree-ring chronology to reconstruct glacier annual net mass balance. Transformations were tested and applied to the data to improve the performance of the model, and a final mass-balance record for Easton Glacier and a regional index were created and analyzed for the period of AD 1770-2012. The final Easton Glacier and regional reconstructions explain 48% and 42%, respectively, of the variance in the mass balance data. Periods of above-average mass balance of Easton Glacier were identified between AD 1800-1820, AD 1845-1853, AD 1893-1927, and AD 1952-1985. Periods of predominately below-average mass balance were shown between AD 1780-1800, AD 1834-1844, AD 1884-1892, AD 1928-1951, and AD 1985-2005. Our record is consistent with known dated moraine positions and with other proxy records in the surrounding region. It also corresponds well with positive and negative phases of the Pacific Decadal Oscillation, emphasizing the influence of wintertime precipitation variability on the mass balance of glaciers in the North Cascades.
Author:
Publisher: Academic Press
ISBN: 0123964733
Category : Nature
Languages : en
Pages : 787
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Book Description
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
Author: Frank Paul
Publisher:
ISBN:
Category :
Languages : en
Pages : 194
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Book Description
Author: Doru Bănăduc
Publisher: Springer Nature
ISBN: 3030372421
Category : Science
Languages : en
Pages : 435
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Book Description
The second-longest European river after the Volga, the Danube is one of the world’s most important rivers in terms of its geographical and historical significance. In recent history, it has served as a major international waterway and numerous cities, including four capitals, have been founded on its banks. The 2826km-long Danube has a watershed measuring 801,093 km2 that is now shared between 19 countries, from its source in the Black Forest to the Black Sea, into which it pumps an average of 827 km3 of water a year. This book describes and explains key landscape values interactions (geographical, cultural and natural heritage). It also identifies the threats and various types of human impact affecting this system in all the countries of the Danube River Basin, based on the investigations and perspectives of a team of experienced naturalists, and in the context of the early 21st century, in which the human-nature relationship is still far from balanced. These studies demonstrate how biodiversity, conservation and ecological studies can help us successfully promote mutual cooperation and combine our efforts to address problems as a responsible continent.
Author: J. Oerlemans
Publisher: CRC Press
ISBN: 9026518137
Category : Science
Languages : en
Pages : 168
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Book Description
This text brings together meteorology and the theory of glacier flow, providing a fundamental understanding of how glaciers respond to climate change. Attention is paid to the microclimate of glaciers and the physical processes regulating the exchange of energy and mass between glacier surface and atmosphere. Simple analytical and numerical models are used to: · investigate glaciers sensitivity to climate change · estimate response times · make an interpretation of historical glacier records · assess the contribution of glacier melt to sea-level rise Modern developments in glacier research, including satellite measurements are discussed in detail, making this a valuable reference source.
Author: Robert S. Hildebrand
Publisher: Geological Society of America
ISBN: 0813724953
Category : Science
Languages : en
Pages : 182
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Book Description
"In this well-illustrated book, Hildebrand expands upon his model for the development of the North American Cordillera detailed in Special paper 457. Starting with an overview of Cordilleran geology he goes on to provide an in depth look at how the Rubian ribbon continent was assembled. He integrates the complex geology of the Cordillera into an actualistic model involving arc magmatism, arc-continent collision, slab failure magmatism, and transcurrent motion in both Rubia and the western North American margin. While much of the focus is on the assembly of the Rubian ribbon continent, Hildebrand explores its interactions with North America during the Sevier and Laramide events and concludes that North America was the lower plate in both"--Provided by publisher.
Author: Robert Henson
Publisher: Rough Guides UK
ISBN: 140538865X
Category : Science
Languages : en
Pages : 418
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Book Description
The Rough Guide to Climate Change gives the complete picture of the single biggest issue facing the planet. Cutting a swathe through scientific research and political debate, this completely updated 3rd edition lays out the facts and assesses the options-global and personal-for dealing with the threat of a warming world. The guide looks at the evolution of our atmosphere over the last 4.5 billion years and what computer simulations of climate change reveal about our past, present and future. This updated edition includes scientific findings that have emerged since the 2007 report from the Intergovernmental Panel on Climate Change (IPCC), as well as background on recent controversies and an updated politics section that reflects post-Copenhagen developments. Discover how rising temperatures and sea levels, plus changes to extreme weather patterns, are already affecting life around the world. The Rough Guide to Climate Change unravels how governments, scientists and engineers plan to tackle the problem and includes information on what you can do to help.
Author: Sara Carena
Publisher: Geological Society of America
ISBN: 0813700221
Category : Science
Languages : en
Pages : 134
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Book Description
Organised in conjunction with the Fragile Earth International Conference, the field trips reported in this volume examine the records and recording tools of geological processes, from plate motions, to deep crystal structure and deformation, to near-surface processes and interactions between the Earth's surface and climate.
