Late Pleistocene Glacial And Environmental Change Eastern Glacier National Park Montana

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Late Pleistocene Glacial and Environmental Change, Eastern Glacier National Park, Montana

Author : Nathan Schachtman
Publisher :
ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.:/5 (94 download)

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Book Synopsis Late Pleistocene Glacial and Environmental Change, Eastern Glacier National Park, Montana by : Nathan Schachtman

Download or read book Late Pleistocene Glacial and Environmental Change, Eastern Glacier National Park, Montana written by Nathan Schachtman and published by . This book was released on 2014 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Few records in the alpine landscape of western North America document the geomorphic and glaciologic response to climate change during the Pleistocene-Holocene transition. While glacial moraines can provide snapshots of glacier extent in the northern U.S. Rocky Mountains, high-resolution records of environmental change spanning glacial retreat at the end of the Last Glacial Maximum, the Younger Dryas (YD) cooling, and subsequent warming into the stable Holocene are rare. We describe the transition from the late Pleistocene to the early Holocene using a ~17 ka sediment core from Swiftcurrent Lake in eastern Glacier National Park, MT, with a focus on ~17-11 ka. Total organic carbon (%TOC), total inorganic carbon (%TIC), grain size, and carbon/nitrogen (C/N) values provide evidence for warming climate from the late Pleistocene into the Holocene, with the exception of a well-constrained interval of rapid cooling during the YD between 12.5 and 11.5 ka. The variable concentration of detrital dolomite, derived from glacial erosion of bedrock near the valley headwall and cirque basin, provides a high-resolution record of Grinnell Glacier advance and retreat. Dolomite concentrations decrease during glacial retreat and increase during periods of advancing ice, corroborated by sedimentological and geochemical data. We interpret increased dolomite concentration in Swiftcurrent Lake as reflecting enhanced glacial erosion and sediment transport, likely a result of more proximal ice terminus position, possibly increased hydrologic energy, and a reduction in the number of alpine lakes acting as sediment sinks in the valley.

Glaciers and Glaciation in Glacier National Park

Author : James Lindsay Dyson
Publisher :
ISBN 13 : 9781258501341
Total Pages : 28 pages
Book Rating : 4.5/5 (13 download)

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Book Synopsis Glaciers and Glaciation in Glacier National Park by : James Lindsay Dyson

Download or read book Glaciers and Glaciation in Glacier National Park written by James Lindsay Dyson and published by . This book was released on 2012-10-01 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Special Bulletin Number 2, Glacier Natural History Association.

North Pacific Environment and Paleoclimate from the Late Pleistocene to Present

Author : Miriam Jones
Publisher : Frontiers Media SA
ISBN 13 : 2889633373
Total Pages : 208 pages
Book Rating : 4.8/5 (896 download)

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Book Synopsis North Pacific Environment and Paleoclimate from the Late Pleistocene to Present by : Miriam Jones

Download or read book North Pacific Environment and Paleoclimate from the Late Pleistocene to Present written by Miriam Jones and published by Frontiers Media SA. This book was released on 2020-01-13 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vast area of the North Pacific, spanning ~55˚ longitude, represents a challenge for documenting and understanding the geologic history of ocean, atmosphere, and terrestrial environmental change. Nevertheless, its importance for many issues, including our fundamental understanding of ocean and atmospheric circulation patterns and teleconnections with natural modes of climate variability through time, has led to a steady rise in the numbers of study sites and proxy types. By bringing together a wide range of proxies and timescales that examine the impacts of paleoclimate on ecosystems, water, carbon, and humans, and interactions between marine and terrestrial processes, this Research Topic contributes to an improved understanding of the region’s significance at global, hemispheric, and regional scales.

Late Pleistocene and Holocene Environmental Change on the Olympic Peninsula, Washington

Author : Daniel G. Gavin
Publisher : Springer
ISBN 13 : 3319110144
Total Pages : 148 pages
Book Rating : 4.3/5 (191 download)

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Book Synopsis Late Pleistocene and Holocene Environmental Change on the Olympic Peninsula, Washington by : Daniel G. Gavin

Download or read book Late Pleistocene and Holocene Environmental Change on the Olympic Peninsula, Washington written by Daniel G. Gavin and published by Springer. This book was released on 2014-11-25 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study brings together decades of research on the modern natural environment of Washington's Olympic Peninsula, reviews past research on paleoenvironmental change since the Late Pleistocene, and finally presents paleoecological records of changing forest composition and fire over the last 14,000 years. The focus of this study is on the authors’ studies of five pollen records from the Olympic Peninsula. Maps and other data graphics are used extensively. Paleoecology can effectively address some of these challenges we face in understanding the biotic response to climate change and other agents of change in ecosystems. First, species responses to climate change are mediated by changing disturbance regimes. Second, biotic hotspots today suggest a long-term maintenance of diversity in an area, and researchers approach the maintenance of diversity from a wide range and angles (CITE). Mountain regions may maintain biodiversity through significant climate change in ‘refugia’: locations where components of diversity retreat to and expand from during periods of unfavorable climate (Keppel et al., 2012). Paleoecological studies can describe the context for which biodiversity persisted through time climate refugia. Third, the paleoecological approach is especially suited for long-lived organisms. For example, a tree species that may typically reach reproductive sizes only after 50 years and remain fertile for 300 years, will experience only 30 to 200 generations since colonizing a location after Holocene warming about 11,000 years ago. Thus, by summarizing community change through multiple generations and natural disturbance events, paleoecological studies can examine the resilience of ecosystems to disturbances in the past, showing how many ecosystems recover quickly while others may not (Willis et al., 2010).

The Geologic Story of Glacier National Park

Author : James L. Dyson
Publisher : Lulu.com
ISBN 13 : 0359769837
Total Pages : 44 pages
Book Rating : 4.3/5 (597 download)

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Book Synopsis The Geologic Story of Glacier National Park by : James L. Dyson

Download or read book The Geologic Story of Glacier National Park written by James L. Dyson and published by Lulu.com. This book was released on 1953 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

U.S. Geological Survey Bulletin

Author :
Publisher :
ISBN 13 :
Total Pages : 266 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis U.S. Geological Survey Bulletin by :

Download or read book U.S. Geological Survey Bulletin written by and published by . This book was released on 1983 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

High Resolution Lacustrine Records of Historical Environmental Change in Glacier National Park, Montana, USA

Author : Heidi Anderson
Publisher :
ISBN 13 :
Total Pages : 66 pages
Book Rating : 4.:/5 (92 download)

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Book Synopsis High Resolution Lacustrine Records of Historical Environmental Change in Glacier National Park, Montana, USA by : Heidi Anderson

Download or read book High Resolution Lacustrine Records of Historical Environmental Change in Glacier National Park, Montana, USA written by Heidi Anderson and published by . This book was released on 2014 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multi-proxy geochemical analyses of lacustrine sediment cores from a chain of lakes in east Galcier National Park, Montana reflect increasing human activity, glacier response, and regional climate change over the past~1400 years.

Lake Bonneville: A Scientific Update

Author : Charles G. Oviatt
Publisher : Elsevier
ISBN 13 : 0444635947
Total Pages : 698 pages
Book Rating : 4.4/5 (446 download)

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Book Synopsis Lake Bonneville: A Scientific Update by : Charles G. Oviatt

Download or read book Lake Bonneville: A Scientific Update written by Charles G. Oviatt and published by Elsevier. This book was released on 2016-08-24 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lake Bonneville: A Scientific Update showcases new information and interpretations about this important lake in the North American Great Basin, presenting a relatively complete summary of the evolving scientific ideas about the Pleistocene lake. A comprehensive book on Lake Bonneville has not been published since the masterpiece of G.K. Gilbert in 1890. Because of Gilbert's work, Lake Bonneville has been the starting point for many studies of Quaternary paleolakes in many places throughout the world. Numerous journal articles, and a few books on specialized topics related to Lake Bonneville, have been published since the late 1800s, but here the editors compile the important data and perspectives of the early 21st century into a book that will be an essential reference for future generations. Scientific research on Lake Bonneville is vibrant today and will continue into the future. - Makes the widespread and detailed literature on this well-known Pleistocene body of water accessible - Gives expositions of the many famous and iconic landforms and deposits - Contains over 300 illustrations, most in full color - Contains chapters on many important topics, including stratigraphy, sedimentology, hydrology, geomorphology, geochronology, isostasy, geophysics, geochemistry, vegetation history, pollen, fishes, mammals, mountain glaciation, prehistoric humans, paleoclimate, remote sensing, and geoantiquities in the Bonneville basin

Quaternary Paleoclimate

Author : W. C. Mahaney
Publisher : Norwich [Norfolk] : Geo Abstracts
ISBN 13 :
Total Pages : 488 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Quaternary Paleoclimate by : W. C. Mahaney

Download or read book Quaternary Paleoclimate written by W. C. Mahaney and published by Norwich [Norfolk] : Geo Abstracts. This book was released on 1981 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: 22 papers given at the fourth conference on Quaternary Research, May 18-20, 1979 which discuss methods of reconstructing paleoclimate.

After the Fires

Author : Linda L. Wallace
Publisher : Yale University Press
ISBN 13 : 0300127758
Total Pages : 400 pages
Book Rating : 4.3/5 (1 download)

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Book Synopsis After the Fires by : Linda L. Wallace

Download or read book After the Fires written by Linda L. Wallace and published by Yale University Press. This book was released on 2004-01-01 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Americans currently choose their president through the electoral college, an extraordinarily complex mechanism that may elect a candidate who does not receive the most votes. In this provocative book, George Edwards III argues that, contrary to what supporters of the electoral college claim, there is no real justification for a system that might violate majority rule. Drawing on systematic data, Edwards finds that the electoral college does not protect the interests of small states or racial minorities, does not provide presidents with effective coalitions for governing, and does little to protect the American polity from the alleged harms of direct election of the president. In fact, the electoral college distorts the presidential campaign so that candidates ignore most small states and some large ones and pay little attention to minorities, and it encourages third parties to run presidential candidates and discourages party competition in many states. Edwards demonstrates effectively that direct election of the president without a runoff maximizes political equality and eliminates the distortions in the political system caused by the electoral college.

Mechanisms of Global Climate Change at Millennial Time Scales

Author : Lloyd D. Keigwin
Publisher : American Geophysical Union
ISBN 13 : 087590095X
Total Pages : 394 pages
Book Rating : 4.8/5 (759 download)

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Book Synopsis Mechanisms of Global Climate Change at Millennial Time Scales by : Lloyd D. Keigwin

Download or read book Mechanisms of Global Climate Change at Millennial Time Scales written by Lloyd D. Keigwin and published by American Geophysical Union. This book was released on 1999-01-26 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contributors describe the current understanding of abrupt climate variations that have occurred at millennial to submillennial time scales, events now recognized as characteristics of the global climate during the last glaciation. Subjects covered include analysis of modern climate and ocean dynamics, paleoclimate reconstructions derived from the marine, terrestrial and ice core records, and paleoclimate modeling studies. The breadth of global paleoclimate knowledge presented here provides information required to answer many questions and provides a road map to address remaining problems. Most material is from a June 1998 conference. Lacks a subject index. Annotation copyrighted by Book News, Inc., Portland, OR.

Late Pleistocene and Holocene Aged Glacial and Climate Reconstructions in the Goat Rocks Wilderness, Washington, United States

Author : Joshua Andrews Heard
Publisher :
ISBN 13 :
Total Pages : 142 pages
Book Rating : 4.:/5 (859 download)

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Book Synopsis Late Pleistocene and Holocene Aged Glacial and Climate Reconstructions in the Goat Rocks Wilderness, Washington, United States by : Joshua Andrews Heard

Download or read book Late Pleistocene and Holocene Aged Glacial and Climate Reconstructions in the Goat Rocks Wilderness, Washington, United States written by Joshua Andrews Heard and published by . This book was released on 2012 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eight glaciers, covering an area of 1.63 km2, reside on the northern and northeastern slopes of the Goat Rocks tallest peaks in the Cascades of central Washington. At least three glacial stands occurred downstream from these glaciers. Closest to modern glacier termini are Little Ice Age (LIA) moraines that were deposited between 1870 and 1899 AD, according to the lichenometric analysis. They are characterized by sharp, minimally eroded crests, little to no soil cover, and minimal vegetation cover. Glacier reconstructions indicate that LIA glaciers covered 8.29 km2, 76% more area than modern ice coverage. The average LIA equilibrium line altitude (ELA) of 1995 ± 70 m is ~150 m below the average modern ELA of 2149 ± 76 m. To satisfy climate conditions at the LIA ELA, the winter snow accumulation must have been 8 to 43 cm greater and mean summer temperatures 0.2 to 1.3 oC cooler than they are now. Late Pleistocene to early Holocene (LPEH) aged moraines are located between 100 and 400 m below the LIA deposits. They have degraded moraine crests, few surface boulders, and considerable vegetation and soil cover. Volcanic ashes indicate LPEH moraines were deposited before 1480 AD while morphometric data suggest deposition during the late Pleistocene or early Holocene. The average LPEH ELA of 1904 ± 110 m is ~ 240 m and ~90 m below the modern and LIA ELAs, respectively. The climate change necessary to maintain a glacier with an ELA at that elevation for LPEH conditions requires the winter accumulation to increase by 47 to 48 cm weq and the mean summer temperature to cool by 1.4 to 1.5 oC. Last glacial maximum (LGM) moraines are located more than 30 km downstream from modern glacial termini. They are characterized by hummocky topography, rounded moraine crests, complete vegetation cover, and well developed soil cover. Moraine morphometry, soil characteristics, and distance from modern glacial termini indicate that deposition occurred at least 15 ka BP during an expansive cooling event, the last being the LGM. The LGM ELA of 1230 m is ~920 m below the modern ELA. The climate change necessary to maintain a glacier with an ELA at that elevation for LGM conditions requires the mean summer temperature to cool by 5.6 oC with no change in precipitation.

Little Ice Ages Vol2 Ed2

Author : Jean M Grove
Publisher : Routledge
ISBN 13 : 1134701829
Total Pages : 325 pages
Book Rating : 4.1/5 (347 download)

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Book Synopsis Little Ice Ages Vol2 Ed2 by : Jean M Grove

Download or read book Little Ice Ages Vol2 Ed2 written by Jean M Grove and published by Routledge. This book was released on 2013-08-21 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: First Published in 2004. Routledge is an imprint of Taylor & Francis, an informa company.

The Melting World

Author : Christopher White
Publisher : Macmillan + ORM
ISBN 13 : 125002885X
Total Pages : 287 pages
Book Rating : 4.2/5 (5 download)

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Book Synopsis The Melting World by : Christopher White

Download or read book The Melting World written by Christopher White and published by Macmillan + ORM. This book was released on 2013-09-03 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global warming usually seems to happen far away, but one catastrophic effect of climate change is underway right now in the Rocky Mountains. In The Melting World, Chris White travels to Montana to chronicle the work of Dan Fagre, a climate scientist and ecologist, whose work shows that alpine glaciers are vanishing rapidly close to home. For years, Fagre has monitored the ice sheets in Glacier National Park proving that they—and by extension all Rocky Mountain ice—will melt far faster than previously imagined. How long will the ice fields survive? What are the consequences on our environment? The Melting World chronicles the first extinction of a mountain ecosystem in what is expected to be a series of such global calamities as humanity faces the prospect of a world without alpine ice.

Environmental assessment for the development concept plans

Author :
Publisher :
ISBN 13 :
Total Pages : 220 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Environmental assessment for the development concept plans by :

Download or read book Environmental assessment for the development concept plans written by and published by . This book was released on 1985 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Publications of the Geological Survey

Author : Geological Survey (U.S.)
Publisher :
ISBN 13 :
Total Pages : 330 pages
Book Rating : 4.3/5 (243 download)

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Book Synopsis Publications of the Geological Survey by : Geological Survey (U.S.)

Download or read book Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1983 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Little Ice Age

Author : Jean M. Grove
Publisher : Routledge
ISBN 13 : 1134857462
Total Pages : 869 pages
Book Rating : 4.1/5 (348 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 2019-04-30 with total page 869 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.