Late Glacial and Holocene Fluctuations of Local Glaciers and the Greenland Ice Sheet, Eastern and Western Greenland

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ISBN 13 :
Total Pages : 408 pages
Book Rating : 4.:/5 (884 download)

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Book Synopsis Late Glacial and Holocene Fluctuations of Local Glaciers and the Greenland Ice Sheet, Eastern and Western Greenland by : Laura B. Levy

Download or read book Late Glacial and Holocene Fluctuations of Local Glaciers and the Greenland Ice Sheet, Eastern and Western Greenland written by Laura B. Levy and published by . This book was released on 2014 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Greenland Ice Sheet (GrIS) is responding sensitively to climate change and its meltwater has the potential to influence global sea level. Recently, large changes in the GrIS have occurred including increased velocities of outlet glaciers and melt over ~97% of the ice sheet. One means to understand modern and help predict future changes in the GrIS is to examine how it responded to past climate conditions. In this dissertation I provide a longer-term perspective of changes in the GrIS as well as in smaller, independent glaciers near the ice sheet margins (i.e., "local" glaciers). My research documents the past extents of the GrIS in central East and southern West Greenland during the Holocene Epoch (11,600 yrs ago-present) and provides evidence for climate conditions along the ice sheet margin during late glacial time (~17,500-11,600 yrs ago) and the Holocene Epoch. I use geomorphic mapping, surface exposure dating and lake sediment analyses to demonstrate that the GrIS and local glaciers in central East Greenland were receding during the Younger Dryas cold event (~12,900-11,600 yrs ago) and deposited the Milne Land stade moraines at the end of the Younger Dryas. I hypothesize that these ice marginal fluctuations were primarily influenced by air or ocean surface temperatures. I document the Holocene fluctuations of a local glacier that completely disappeared indicating peak warm conditions between ~9.3 and 6.0 cal kyr BP. The formation of this glacier at 2.6 cal kyr BP and its persistence from ~1.9 cal kyr BP-present suggests cold conditions during late Holocene time. I also use geomorphic mapping and surface exposure dating to document the extents of the GrIS in southern West Greenland, near Kangerlussuaq. I show that the Keglen, Ørkendalen and Historical moraines were deposited at 7.3 ka, 6.3 ka, and by ~AD 1950, respectively. These data indicate that the GrIS was as small as or smaller than at present during much of middle to late Holocene time. Finally, I synthesize my results and discuss possible causes of GrIS marginal changes in central East and southern West Greenland including changes in air and ocean temperatures and changes in sea level."

Holocene Ice Sheet Dynamics and Detrital Provenance Shifts Along the West Greenland Margin

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (128 download)

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Book Synopsis Holocene Ice Sheet Dynamics and Detrital Provenance Shifts Along the West Greenland Margin by : Lina Madaj

Download or read book Holocene Ice Sheet Dynamics and Detrital Provenance Shifts Along the West Greenland Margin written by Lina Madaj and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the effect of Arctic Amplification the Arctic is currently warming at least twice as fast as the rest of the planet. Seasonal sea-ice extent has been alarmingly declining in the past decade. Glaciers and ice caps along the Greenland coast and in the Canadian Arctic have been losing mass on an accelerated rate during the past century. As the global climate system is a complex system connecting different regions via atmospheric transport, changes in Arctic climate patterns are affecting the climate and weather conditions in the lower latitudes. The Greenland Ice Sheet as well as glaciers and ice caps in the Canadian Arctic are the largest freshwater storages on the northern hemisphere and expected to be among the highest contributors to global sea level rise. Freshwater input through meltwater discharge is not only affecting sea level rise but further influencing deep water formation in the Labrador Sea and the subpolar North Atlantic and hence global ocean circulation and climate patterns. To be able to sufficiently predict future developments of the Greenland Ice Sheet with respect to mass loss and resulting impacts on the global climate, data from past climate and Greenland Ice Sheet extents are crucially important. The Holocene spanning the last period of the deglaciation after the Last Glacial Maximum culminating in the Holocene Thermal Maximum when atmospheric temperatures were warmer and glacier and ice-sheet extent smaller than today represents the closest analogue to current atmospheric warming and Greenland Ice Sheet mass loss. The wide west Greenland shelf of Baffin Bay and Labrador Sea hosts thick marine sediments archiving around ten thousand years of this past climate and ice-sheet history. Siliciclastic detrital material discharged into Baffin Bay and the Labrador Sea via meltwater and erosion can be separated from those sedimentary archives and traced back to its source region. Radiogenic isotopes (Sr, Nd, Pb) label the source regions of those sediments by fingerprinting the isotopic composition of the prevailing bedrock. Hence, they can be used as reliable provenance tracers. Retreating land-ice masses expose bedrock that before was not subject to erosion, influencing the isotopic signatures delivered into the surrounding ocean. Based on this theory, radiogenic isotopes can record changes in siliciclastic detrital sediment provenance and hence, indirectly trace ice-sheet dynamics. The overall aim of this thesis work is to reconstruct changes in detrital sediment provenance along the west Greenland shelf to gain new insights into Holocene Greenland Ice Sheet dynamics and ocean current-induced sediment transport. Sedimentary archives from three main research areas (eastern Labrador Sea, northeastern Baffin Bay, and Kane Basin, central Nares Strait) record obvious shifts in sediment provenance throughout the Holocene. Those shifts coincide with major regional climatic changes in the research area. Generally, all records reveal the local bedrock as the main source region of detrital material and distal-sourced material transported along the coast via the West Greenland Current as a secondary source. Although the proportion of distal sourced material appears to be small, changes in West Greenland Current strength have been recorded in the isotopic composition. In southwestern Greenland and the Labrador Sea radiogenic isotope records reveal a shift towards a higher proportion of the local Archean Block in the late Holocene caused by Neoglacial ice advance and a reduction in West Greenland Current speed delivering less material from southern most Greenland. Farther north in the Upernavik region, midwest Greenland coast, the isotopic composition marks a change with the transition from early to mid Holocene caused by increased West Greenland Current strength and the opening of Vaigat Strait which enabled erosion and transport of freshly exposed basalts from the Disko Bay area due to ice-sheet retreat. This basalt input is, however, not transported all the way to northernmost Melville Bay (northern Baffin Bay) where the detrital sediment composition is clearly dominated by contribution of the local Committee-Melville Belt without any significant provenance changes throughout the Holocene. Farthest north, the sedimentary record from Kane Basin records provenance shifts that confirm the opening of Nares Strait around 8.3 ka BP. This event is followed by an increased delivery of carbonate-rich detrital sediments from northern Ellesmere Island due to the newly established gateway of Arctic Ocean water transporting sediments from further north to the core location. Additionally determined mineralogical composition of the sedimentary records along the west Greenland coast supports the interpretation drawn from the radiogenic isotopic composition. Furthermore, it points out the additional value of radiogenic isotopes through variations only visible in isotopic composition but not in the mineralogical composition. Further comparison to other studies from the region based on different tracers confirms the reliability and sufficient application of radiogenic isotopes in provenance studies as well as the advantage of multi-proxy approaches in paleoclimatological studies. Overall, this study highlights the advantages and reliability of radiogenic isotopes in provenance studies with regards to reconstructions of ice-sheet dynamics. The combination of the three isotopic systems (Sr, Nd, Pb) enables source region determination with a higher probability compensating for overlapping signatures within individual isotopic systems. The transect of sedimentary records along the west Greenland coast identifies clearly distinguishable isotopic ranges for the different Greenland bedrock terrains, qualifying this approach for further high-resolution investigation in past Greenland Ice Sheet development.

Quaternary Glaciations - Extent and Chronology

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Publisher : Elsevier
ISBN 13 : 0444535373
Total Pages : 1127 pages
Book Rating : 4.4/5 (445 download)

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Book Synopsis Quaternary Glaciations - Extent and Chronology by : J. Ehlers

Download or read book Quaternary Glaciations - Extent and Chronology written by J. Ehlers and published by Elsevier. This book was released on 2011-06-29 with total page 1127 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents an up-to-date, detailed overview of the Quaternary glaciations all over the world, not only with regard to stratigraphy but also with regard to major glacial landforms and the extent of the respective ice sheets. The locations of key sites are included. The information is presented in digital, uniformly prepared maps which can be used in a Geographical Information System (GIS) such as ArcView or ArcGIS. The accompanying text supplies the information on how the data were obtained (geomorphology, geological mapping, air photograph evaluation, satellite imagery), how the features were dated (14C, TL, relative stratigraphy) and how reliable they are supposed to be. All references to the underlying basic publications are included. Where controversial interpretations are possible e.g. in Siberia or Tibet, this is pointed out. As a result, the information on Quaternary glaciations worldwide will be much improved and supplied in a uniform digital format. The information on the glacial limits is compiled in digital form by the coordinators of the project, and is available for download at: http://booksite.elsevier.com/9780444534477/ - Completely updated detailed coverage of worldwide Quaternary glaciations - Information in digital, uniformly prepared maps which can be used in a GIS such as ArcView or ArcGis - Step-by-step guideline how to open and use ArcGis files - Possibility to convert the shapefiles into GoogleEarth kmz-files - Availability of chronological controls

Treatise on Geomorphology

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Publisher : Academic Press
ISBN 13 : 0080885225
Total Pages : 6392 pages
Book Rating : 4.0/5 (88 download)

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Book Synopsis Treatise on Geomorphology by :

Download or read book Treatise on Geomorphology written by and published by Academic Press. This book was released on 2013-02-27 with total page 6392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The changing focus and approach of geomorphic research suggests that the time is opportune for a summary of the state of discipline. The number of peer-reviewed papers published in geomorphic journals has grown steadily for more than two decades and, more importantly, the diversity of authors with respect to geographic location and disciplinary background (geography, geology, ecology, civil engineering, computer science, geographic information science, and others) has expanded dramatically. As more good minds are drawn to geomorphology, and the breadth of the peer-reviewed literature grows, an effective summary of contemporary geomorphic knowledge becomes increasingly difficult. The fourteen volumes of this Treatise on Geomorphology will provide an important reference for users from undergraduate students looking for term paper topics, to graduate students starting a literature review for their thesis work, and professionals seeking a concise summary of a particular topic. Information on the historical development of diverse topics within geomorphology provides context for ongoing research; discussion of research strategies, equipment, and field methods, laboratory experiments, and numerical simulations reflect the multiple approaches to understanding Earth’s surfaces; and summaries of outstanding research questions highlight future challenges and suggest productive new avenues for research. Our future ability to adapt to geomorphic changes in the critical zone very much hinges upon how well landform scientists comprehend the dynamics of Earth’s diverse surfaces. This Treatise on Geomorphology provides a useful synthesis of the state of the discipline, as well as highlighting productive research directions, that Educators and students/researchers will find useful. Geomorphology has advanced greatly in the last 10 years to become a very interdisciplinary field. Undergraduate students looking for term paper topics, to graduate students starting a literature review for their thesis work, and professionals seeking a concise summary of a particular topic will find the answers they need in this broad reference work which has been designed and written to accommodate their diverse backgrounds and levels of understanding Editor-in-Chief, Prof. J. F. Shroder of the University of Nebraska at Omaha, is past president of the QG&G section of the Geological Society of America and present Trustee of the GSA Foundation, while being well respected in the geomorphology research community and having won numerous awards in the field. A host of noted international geomorphologists have contributed state-of-the-art chapters to the work. Readers can be guaranteed that every chapter in this extensive work has been critically reviewed for consistency and accuracy by the World expert Volume Editors and by the Editor-in-Chief himself No other reference work exists in the area of Geomorphology that offers the breadth and depth of information contained in this 14-volume masterpiece. From the foundations and history of geomorphology through to geomorphological innovations and computer modelling, and the past and future states of landform science, no "stone" has been left unturned!

European Glacial Landscapes

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Publisher : Elsevier
ISBN 13 : 0323997139
Total Pages : 637 pages
Book Rating : 4.3/5 (239 download)

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Book Synopsis European Glacial Landscapes by : David Palacios

Download or read book European Glacial Landscapes written by David Palacios and published by Elsevier. This book was released on 2023-10-21 with total page 637 pages. Available in PDF, EPUB and Kindle. Book excerpt: European Glacial Landscapes: The Holocene presents the current state of knowledge on glacial landscapes of Europe and nearby areas over the Holocene to deduce the influence of atmospheric and oceanic currents and the insolation forcing variability and volcanic activity on Holocene paleoclimates, the existence of asynchronies in the timing of occurrence of glacier expansion and shrinkage during the Holocene, time lags between the identification of oceanic and atmospheric changes and those occurring in glacial extension during the Holocene, the role of Holocene glaciers on the climate of Europe, and on sea level variability, and the delimitation of landscapes that need special protection. Students, academics and researchers in Geography, Geology, Environmental Sciences, Physics and Earth Science departments will find this book provides novel findings of all the major European Regions in a single publication, with updated information about Holocene glacial geomorphology and paleo-climatology and clear figures that model the landscapes covered. Provides a synthesis and summary of glacial processes in Europe over the Holocene period Features research from experts in palaeo-climatology, palaeo-oceanography and palaeo-glaciology Includes access to a companion website with an interactive map, photos of glacial features, and geospatial data related to European Glacial Landscapes

Encyclopedia of Snow, Ice and Glaciers

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Publisher : Springer Science & Business Media
ISBN 13 : 904812641X
Total Pages : 1301 pages
Book Rating : 4.0/5 (481 download)

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Book Synopsis Encyclopedia of Snow, Ice and Glaciers by : Vijay P. Singh

Download or read book Encyclopedia of Snow, Ice and Glaciers written by Vijay P. Singh and published by Springer Science & Business Media. This book was released on 2011-07-01 with total page 1301 pages. Available in PDF, EPUB and Kindle. Book excerpt: The earth’s cryosphere, which includes snow, glaciers, ice caps, ice sheets, ice shelves, sea ice, river and lake ice, and permafrost, contains about 75% of the earth’s fresh water. It exists at almost all latitudes, from the tropics to the poles, and plays a vital role in controlling the global climate system. It also provides direct visible evidence of the effect of climate change, and, therefore, requires proper understanding of its complex dynamics. This encyclopedia mainly focuses on the various aspects of snow, ice and glaciers, but also covers other cryospheric branches, and provides up-to-date information and basic concepts on relevant topics. It includes alphabetically arranged and professionally written, comprehensive and authoritative academic articles by well-known international experts in individual fields. The encyclopedia contains a broad spectrum of topics, ranging from the atmospheric processes responsible for snow formation; transformation of snow to ice and changes in their properties; classification of ice and glaciers and their worldwide distribution; glaciation and ice ages; glacier dynamics; glacier surface and subsurface characteristics; geomorphic processes and landscape formation; hydrology and sedimentary systems; permafrost degradation; hazards caused by cryospheric changes; and trends of glacier retreat on the global scale along with the impact of climate change. This book can serve as a source of reference at the undergraduate and graduate level and help to better understand snow, ice and glaciers. It will also be an indispensable tool containing specialized literature for geologists, geographers, climatologists, hydrologists, and water resources engineers; as well as for those who are engaged in the practice of agricultural and civil engineering, earth sciences, environmental sciences and engineering, ecosystem management, and other relevant subjects.

Glaciers and Environmental Change

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Publisher : Routledge
ISBN 13 : 1317836065
Total Pages : 216 pages
Book Rating : 4.3/5 (178 download)

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Book Synopsis Glaciers and Environmental Change by : Atle Nesje

Download or read book Glaciers and Environmental Change written by Atle Nesje and published by Routledge. This book was released on 2016-04-29 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This authoritative new text provides a thorough, updated account of glaciers and ice sheets as monitors and indicators of environmental change. It examines the record of environmental change within glaciers and ice sheets, and that of past environments left by retreating glaciers. These themes are examined within the context of environmental change in general and global climate change in particular. Methods of using palaeoenvironmental records are assessed and the implications for future environmental change are discussed. Evidence from glacier ice left in the landscape or within the geological record, provides one of the most important sources of information on environmental change. 'Glaciers and Environmental Change' is a comprehensive account of glaciers andice sheets as monitors and indictaors of environmental change. Based on the latest research, this book consolidates a diverse range of data and explains their applications. it also assesses methods of using palaeoenvironmental records. This authoritative new text examines not only the records of environmental change within glaciers but also that of past environments left by retreating glaciers. These themes are examined within the context of contemporary debates in environmental change and the volume also seeks to draw conclusions concernign past, present and future climatic change in relation to glaciers.

Late Glacial and Holocene History of the Greenland Ice Sheet Margin in Nunatarssuaq, Northwestern Greenland

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ISBN 13 :
Total Pages : 136 pages
Book Rating : 4.:/5 (961 download)

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Book Synopsis Late Glacial and Holocene History of the Greenland Ice Sheet Margin in Nunatarssuaq, Northwestern Greenland by : Lauren Brett Farnsworth

Download or read book Late Glacial and Holocene History of the Greenland Ice Sheet Margin in Nunatarssuaq, Northwestern Greenland written by Lauren Brett Farnsworth and published by . This book was released on 2016 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is uncertain as to how the Greenland Ice Sheet (GrIS) will respond to future climate changes. One means of assessing the sensitivity of the GrIS to projected climate conditions is to determine its response to past conditions. I reconstructed late glacial and Holocene (~15 ka-present) GrIS extents in the Nunatarssuaq, northwestern Greenland. I applied geomorphic mapping, 10Be surface exposure dating and 14C dating of subfossil plants to determine a chronology of past GrIS extents. I also analyzed sediment cores from a glacially fed lake. 10Be ages of boulders and bedrock exposed during deglaciation from the Last Glacial Maximum (LGM; ~26-19.5 ka) are apparently old due to 10Be inherited from prior periods of exposure. The youngest 10Be age (~15 ka) may also contain inherited 10Be but approximates the time of deglaciation. Subfossil plants transported to the GrIS margin on shear planes date to ~4.6 cal ka BP and indicate a less extensive GrIS during middle Holocene time. Geomorphic mapping documents higher levels of Nordsø, a glacial lake dammed by a more extensive GrIS margin. I constrain the age of this GrIS extent to ~3-2 ka using 14C ages of in situ subfossil plants on nunataks and 10Be ages of boulders on the drift deposited during the advance. A fresh drift occurs ~30-50 m beyond the present GrIS margin. 10Be ages of this fresh drift range from 2.2 to 0.5 ka. I interpret the youngest 10Be age (~0.5 ka) as the time the drift was exposed. 14C ages of in situ subfossil plants indicate that the GrIS was at or behind its present margin at AD ~1662-1897. I compare my record of GrIS extents to other glacial fluctuations and climate records. I find that the GrIS margin in Nunatarssuaq fluctuated at similar times as local ice masses and other GrIS margins. The middle Holocene GrIS recession occurred during relatively warm conditions registered by regional climate records and the late Holocene GrIS advances occurred during cooler conditions. I also document asynchronous GrIS margin fluctuations in Nunatarssuaq. These require further investigation to determine whether they were influenced by climate conditions or ice dynamics.

Reconstructing Ice Sheet and Alpine Glacier Margins During the Early Holocene on Nuussuaq in Central West Greenland

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Publisher :
ISBN 13 :
Total Pages : 99 pages
Book Rating : 4.:/5 (96 download)

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Book Synopsis Reconstructing Ice Sheet and Alpine Glacier Margins During the Early Holocene on Nuussuaq in Central West Greenland by : Sandra L. Cronauer

Download or read book Reconstructing Ice Sheet and Alpine Glacier Margins During the Early Holocene on Nuussuaq in Central West Greenland written by Sandra L. Cronauer and published by . This book was released on 2014 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comparison of past ice sheet margin and alpine glacier reconstructions to paleoclimate records can offer insight into the dominant forcing mechanisms that determine glacial response to changes in climate. Previous research on a major ice stream in central West Greenland reveals that the Greenland Ice Sheet (GrIS) responded to abrupt centennial-scale cold periods at ~9. 3 and ~8. 2 ka. The aim of this thesis is to determine whether or not alpine glaciers and a land-terminating ice sheet margin on the peninsula of Nuussuaq in central West Greenland also responded to abrupt climate changes in the early Holocene. To this end, I reconstructed ice sheet and alpine glacier histories on Nuussuaq using cosmogenic 10Be surface exposure dating (herein 10Be dating) and lake sediment analysis. Neither the ice margin nor alpine glacier chronologies indicate a response to abrupt climate change at 9. 3 ka or 8. 2 ka. I found that the Drygalski Moraines are early Holocene in age, with mean moraine ages of 8. 6 ℗ł 0. 4 ka (n=2), 8. 5 ℗ł 0. 2 ka (n=3), and 7. 6 ℗ł 0. 1 ka (n=2) from outer to inner. The moraine chronology, combined with radiocarbon dated lake sediment stratigraphy from an adjacent proglacial lake, reveal that the ice margin remained within about one kilometer of its present position from ~9. 9 to 5. 4 ka. This evidence for ice sheet stability during the first half of the Holocene, followed by minimum ice extent between ~5. 4 and 0. 6 ka, contrasts with many records of early Holocene warmth during the Holocene maximum of Northern Hemisphere summer insolation. This period of ice margin stability may relate to adjacent ocean temperatures, which did not increase until the middle Holocene. A 10Be chronology of moraines deposited by a nearby alpine glacier reveals glacier stability at 10. 5 ℗ł 0. 3 ka, during the Preboreal period. Moraine deposition at this time is potentially due to increased moisture availability as the GrIS retreated and sea ice declined. The alpine glacier chronology also fits well within an emerging pattern of alpine glacier advance during the Preboreal period on East and West Greenland. The results presented in this thesis suggest that GrIS and alpine glacier margin response to changes in climate is complex, and that detailed chronologies from moraines on Greenland can shed light on the intricate processes that link glaciers and climate.

Greenland Icefields and Life in the North Atlantic

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Publisher :
ISBN 13 :
Total Pages : 444 pages
Book Rating : 4.:/5 (5 download)

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Book Synopsis Greenland Icefields and Life in the North Atlantic by : George Frederick Wright

Download or read book Greenland Icefields and Life in the North Atlantic written by George Frederick Wright and published by . This book was released on 1896 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes excursion to Greenland in 1894 with Dr. F.A. Cook, with observations on land and sea ice, peoples, plants and animals. Discusses Pleistocene glaciation and its causes. (AB 19714).

The Evolution of the Greenland Ice Sheet from the Last Glacial Maximum to Present-day: An Assessment Using Glaciological and Glacial Isostatic Adjustment Modelling

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Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (669 download)

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Book Synopsis The Evolution of the Greenland Ice Sheet from the Last Glacial Maximum to Present-day: An Assessment Using Glaciological and Glacial Isostatic Adjustment Modelling by :

Download or read book The Evolution of the Greenland Ice Sheet from the Last Glacial Maximum to Present-day: An Assessment Using Glaciological and Glacial Isostatic Adjustment Modelling written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis we constrain a three-dimensional thermomechanical model of Greenland ice sheet (GrIS) evolution from the Last Glacial Maximum (LGM, 21 ka BP) to the present-day using, primarily, observations of relative sea level (RSL) as well as field data on past ice extent. The new model (Huy2) fits a majority of the observations and is characterised by a number of key features: (i) the ice sheet had an excess volume (relative to present) of 4.1 m ice-equivalent sea level at the LGM, which increased to reach a maximum value of 4.6 m at 16.5 ka BP; (ii) retreat from the continental shelf was not continuous around the entire margin, as there was a Younger Dryas readvance in some areas. The final episode of marine retreat was rapid and relatively late (c. 12 ka BP), leaving the ice sheet land based by 10 ka BP; (iii) in response to the Holocene Thermal Maximum (HTM) the ice margin retreated behind its present-day position by up to 80 km in the southwest, 20 km in the south and 80 km in a small area of the northeast. As a result of this retreat the modelled ice sheet reaches a minimum extent between 5 and 4 ka BP, which corresponds to a deficit volume (relative to present) of 0.17 m ice-equivalent sea level. The results suggest that remaining discrepancies between the model and the observations are likely associated with non-Greenland ice load, differences between modelled and observed present-day ice elevation around the margin, lateral variations in Earth structure and/or the pattern of ice margin retreat. Predictions of present-day vertical land motion generated using the new Huy2 model are highly sensitive to variations of upper mantle viscosity. Depending on the Earth model adopted, different periods of post-LGM ice loading change dominate the present-day response in particular regions of Greenland. These results will be a useful resource when interpreting existing and future observations of vertical land motion in Greenland. In comparison to the sparse number of.

Glacier Fluctuations and Climatic Change

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Publisher : Springer Science & Business Media
ISBN 13 : 9401578230
Total Pages : 414 pages
Book Rating : 4.4/5 (15 download)

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Book Synopsis Glacier Fluctuations and Climatic Change by : Johannes Oerlemans

Download or read book Glacier Fluctuations and Climatic Change written by Johannes Oerlemans and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Symposium on Glacier Fluctuations and Climatic Change, held in Amsterdam, June 1-5, 1987

Geology of Greenland

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Publisher :
ISBN 13 :
Total Pages : 618 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Geology of Greenland by : Arthur Escher

Download or read book Geology of Greenland written by Arthur Escher and published by . This book was released on 1976 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a modern account of all aspects of Greenland's geology.

The Little Ice Age

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Publisher : Routledge
ISBN 13 : 1134980663
Total Pages : 594 pages
Book Rating : 4.1/5 (349 download)

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Book Synopsis The Little Ice Age by : Jean M. Grove

Download or read book The Little Ice Age written by Jean M. Grove and published by Routledge. This book was released on 2012-09-10 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: The evidence for the Little Ice Age, the most important fluctuation in global climate in historical times, is most dramatically represented by the advance of mountain glaciers in the sixteenth and seventeenth centuries and their retreat since about 1850. The effects on the landscape and the daily life of people have been particularly apparent in Norway and the Alps. This major book places an extensive body of material relating to Europe, in the form of documentary evidence of the history of the glaciers, their portrayal in paintings and maps, and measurements made by scientists and others, within a global perspective. It shows that the glacial history of mountain regions all over the world displays a similar pattern of climatic events. Furthermore, fluctuations on a comparable scale have occurred at intervals of a millennium or two throughout the last ten thousand years since the ice caps of North America and northwest Europe melted away. This is the first scholarly work devoted to the Little Ice Age, by an author whose research experience of the subject has been extensive. This book includes large numbers of maps, diagrams and photographs, many not published elsewhere, and very full bibliographies. It is a definitive work on the subject, and an excellent focus for the work of economic and social historians as well as glaciologists, climatologists, geographers, and specialists in mountain environment.

Reconstructing Holocene Glacier Changes in West Greenland from Multispectral Imagery

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Publisher :
ISBN 13 :
Total Pages : 290 pages
Book Rating : 4.:/5 (148 download)

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Book Synopsis Reconstructing Holocene Glacier Changes in West Greenland from Multispectral Imagery by : Kyung In Huh

Download or read book Reconstructing Holocene Glacier Changes in West Greenland from Multispectral Imagery written by Kyung In Huh and published by . This book was released on 2007 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The Greenland Ice Sheet (GIS), the second largest ice mass on Earth, is generally believed to be vulnerable to changes in climate due to its location at more temperate latitudes. Its mass balance and equilibrium state are complex functions of external climate forcing and internal dynamical processes. To understand the mass balance of the Greenland Ice Sheet it is crucial to construct longer temporal records, reaching back to the Little Ice Age (LIA) or beyond. Jakobshavn Isbr in central west Greenland is one of the most dynamically thinning outlet glaciers draining the interior of the Greenland Ice Sheet, contributing 0.06 mm/yr to global sea level rise (Joughin and others, 2004). In this study, multispectral ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) imagery was used to develop procedures for mapping glacial trimlines and terminal moraines around Jakobshavn Isbne. The motivation for using satellite imagery for mapping glacial-geological features is the greater spatial coverage that can be achieved, as opposed to the traditional method of field mapping in restricted areas. ASTER imagery provides spectral bands spanning from the visible to the thermal infrared bands, including two stereo bands, enabling us to map the spectral properties of the Earth's surface as well as to obtain surface topography. With these great opportunities from ASTER, glacial trimlines and major moraine systems around the study area were efficiently mapped and results were verified by other data such as stereo pairs of aerial photographs and GPS data. Extracted trimzone from ASTER classification image and ASTER DEM were applied to calculate ice volume shrinkage since LIA and this is related to Greenland Ice Sheet volume changes and the potential for future changes.

Glacier Science and Environmental Change

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Publisher : John Wiley & Sons
ISBN 13 : 0470750235
Total Pages : 544 pages
Book Rating : 4.4/5 (77 download)

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Book Synopsis Glacier Science and Environmental Change by : Peter G. Knight

Download or read book Glacier Science and Environmental Change written by Peter G. Knight and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glacier Science and Environmental Change is an authoritative and comprehensive reference work on contemporary issues in glaciology. It explores the interface between glacier science and environmental change, in the past, present, and future. Written by the world’s foremost authorities in the subject and researchers at the scientific frontier where conventional wisdom of approach comes face to face with unsolved problems, this book provides: state-of-the-art reviews of the key topics in glaciology and related disciplines in environmental change cutting-edge case studies of the latest research an interdisciplinary synthesis of the issues that draw together the research efforts of glaciologists and scientists from other areas such as geologists, hydrologists, and climatologists color-plate section (with selected extra figures provided in color at www.blackwellpublishing.com/knight). The topics in this book have been carefully chosen to reflect current priorities in research, the interdisciplinary nature of the subject, and the developing relationship between glaciology and studies of environmental change. Glacier Science and Environmental Change is essential reading for advanced undergraduates, postgraduate research students, and professional researchers in glaciology, geology, geography, geophysics, climatology, and related disciplines.

Greenland Ice Core

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Author :
Publisher : American Geophysical Union
ISBN 13 : 0875900577
Total Pages : 127 pages
Book Rating : 4.8/5 (759 download)

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Book Synopsis Greenland Ice Core by : Chester C. Langway

Download or read book Greenland Ice Core written by Chester C. Langway and published by American Geophysical Union. This book was released on 1985 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: