Download or read book Holocene History of the Greenland Ice Sheet Based on Radio carbon dated Moraines in West Greenland written by Norman W. Ten Brink and published by . This book was released on 1975 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Holocene History of the Greenland Ice Sheet Based on Radiocarbon Dated Moraines in West Greenland written by Denmark. Kommissionen for videnskabelige undersøgelser i Grønland and published by . This book was released on 1920 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Holocene History of the Greenland Ice Sheet Based on Radiocarbon dated Moraines in West Greenland written by Norman W. ten Brink and published by . This book was released on 1975 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Holocene Sedimentation History of the Shallow Kangerlussuaq Lakes West Greenland written by Nico W. Willemse and published by Museum Tusculanum Press. This book was released on with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Encyclopedia of Quaternary Science written by Cary Mock and published by Newnes. This book was released on 2013-03-25 with total page 3883 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second revised edition of the Encyclopedia of Quaternary Science, Four Volume Set, provides both students and professionals with an up-to-date reference work on this important and highly varied area of research. There are lots of new articles, and many of the articles that appeared in the first edition have been updated to reflect advances in knowledge since 2006, when the original articles were written. The second edition will contain about 375 articles, written by leading experts around the world. This major reference work is richly illustrated with more than 3,000 illustrations, most of them in colour. Research in the Quaternary sciences has advanced greatly in the last 10 years, especially since topics like global climate change, geologic hazards and soil erosion were put high on the political agenda. This second edition builds upon its award-winning predecessor to provide the reader assured quality along with essential updated coverage Contains 357 broad-ranging articles (4310 pages) written at a level that allows undergraduate students to understand the material, while providing active researchers with a ready reference resource for information in the field. Facilitates teaching and learning The first edition was regarded by many as the most significant single overview of Quaternary science ever, yet Editor-in-Chief, Scott Elias, has managed to surpass that in this second edition by securing even more expert reviews whilst retaining his renowned editorial consistency that enables readers to navigates seamlessly from one unfamiliar topic to the next

Download or read book Modern Periglacial Eolian Deposits and Landforms in the Sondre Stromfjord Area West Greenland and Their Palaeoenvironmental Implications written by Jos W. A. Dijkmans and published by Museum Tusculanum Press. This book was released on 1991 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Holocene Paleoclimates Abstracts written by Martha Andrews and published by . This book was released on 1984 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 1 contains 1300 annotated references to literature on Holocene palaeoclimates with emphasis on high latitude and high altitude areas. Arranged alphabetically by author and grouped into 15 subject categories. Volume 2 contains the following indexes: author, subject, keyword, time period within Holocene epoch, geographic area, title, and dating methods.

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.

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.

Download or read book Report of Activities 1978 written by A. K. Higgins and published by . This book was released on 1979 with total page 1200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geological Society of America Bulletin written by Geological Society of America and published by . This book was released on 1974 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. 1-44 include Proceedings of the annual meeting, 1889-1933, later published separately.

Download or read book The Journal of Glaciology written by and published by . This book was released on 1978 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rapport Gr nlands Geologiske Unders gelse written by Grønlands geologiske undersøgelse and published by . This book was released on 1989 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Arctic Natural Archives written by Nico W. Willemse and published by . This book was released on 2000 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modern and Ancient Fluvial Systems written by J. D. Collinson and published by John Wiley & Sons. This book was released on 2009-04-15 with total page 585 pages. Available in PDF, EPUB and Kindle. Book excerpt: A book of research articles focused on fluvial processes The book is divided into a several main sections for ease of reference: Hydrodynamics and Bedforms; Present?Day Channel Processes; Facies Models; and Economic Aspects. Geographical and geological investigations are also described in Modern and Ancient Fluvial Systems. Research articles include the topics of bedforms and structures near the transition between dunes and a plane bed, as well as the vertical and lateral relationships between five major delta distributary channels. Research papers are also shared within the publication, such as a review of the major developments in the study of channel changes during this century. The individual chapter authors take readers from the Colorado Plateau of the Western United States to the Witwatersrand of South Africa.

Download or read book SGU Series Ca written by and published by . This book was released on 1992 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: