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On Sea Level - Ice Sheet Interactions

Author : Natalya Alissa Gomez
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (874 download)

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Book Synopsis On Sea Level - Ice Sheet Interactions by : Natalya Alissa Gomez

Download or read book On Sea Level - Ice Sheet Interactions written by Natalya Alissa Gomez and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis focuses on the physics of static sea-level changes following variations in the distribution of grounded ice and the influence of these changes on the stability and dynamics of marine ice sheets. Gravitational, deformational and rotational effects associated with changes in grounded ice mass lead to markedly non-uniform spatial patterns of sea-level change. I outline a revised theory for computing post-glacial sea-level predictions and discuss the dominant physical effects that contribute to the patterns of sea-level change associated with surface loading on different timescales. I show, in particular, that a large sea-level fall (rise) occurs in the vicinity of a retreating (advancing) ice sheet on both short and long timescales. I also present an application of the sea-level theory in which I predict the sea-level changes associated with a new model of North American ice sheet evolution and consider the implications of the results for efforts to establish the sources of Meltwater Pulse 1A. These results demonstrate that viscous deformational effects can influence the amplitude of sea-level changes observed at far-field sea-level sites, even when the time window being considered is relatively short (≤ 500 years).

SeaRISE

Author : Robert A. Bindschadler
Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis SeaRISE by : Robert A. Bindschadler

Download or read book SeaRISE written by Robert A. Bindschadler and published by . This book was released on 1990 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a workshop on the possibility of a rapid rise in sea level following the response of the West Antarctic ice sheet to global warming, and outline of a project to study the phenomenon, called SEARISE : Sea Level Response to Ice Sheet Evolution.

On Modelling and Physics of Ice-age Ice Sheet-sea Level-solid Earth Interactionslevel-solid Earth Interactions

Author : Kyeore Han
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (129 download)

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Book Synopsis On Modelling and Physics of Ice-age Ice Sheet-sea Level-solid Earth Interactionslevel-solid Earth Interactions by : Kyeore Han

Download or read book On Modelling and Physics of Ice-age Ice Sheet-sea Level-solid Earth Interactionslevel-solid Earth Interactions written by Kyeore Han and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The retreat and advance of ice sheets perturb the Earth's solid surface, gravitational field and rotation, leading to spatially and temporally varying changes in the elevation of the ocean surface and solid Earth and hence sea level (glacial isostatic adjustment; GIA). Modelling studies have shown that sea-level changes associated with GIA in turn feed back onto ice sheets, confirming the coupled nature of ice sheets, the solid Earth and sea level. These interactions occur over a range of timescales (from decadal to multi-millennial and longer) and have important implications for ice sheet stability and sensitivity to climate changes in marine and terrestrial settings. Understanding the physics of these interactions through the Earth's glacial history is pertinent to interpreting ice-sheet and sea-level records from the past, understanding ongoing changes and projecting future climate changes.This thesis expands 1) the understanding of the history and physics of coupled ice-sheet and sea-level changes in the Northern Hemisphere over the last glacial cycle and 2) the computational capability of coupled ice-sheet - sea-level modelling. In the first study, I apply a sea-level model to simulate gravitationally consistent sea-level changes in North America associated with ice melting through the last deglaciation (21-6 thousand years ago). I separate the ice and water loading signals from periods during active deglaciation and post-deglaciation phases and show how these signals lead to a possible bias in interpreting geophysical records used to constrain the viscosity underlying mantle in the Hudson Bay region. I also identify sites where the bias is minimized in the region.In the second study, I explore how deformation of the solid Earth and perturbations of the gravitational field impacted the evolution of ice sheets in the Northern Hemisphere during the last glacial cycle using a coupled ice-sheet - sea-level model. I demonstrate that solid Earth deformation enhances the dynamics of the Northern Hemispheric ice sheets, causing greater fluctuations of ice sheets in North America and Eurasia throughout the glacial cycle and that gravitational perturbations influence the stability of marine-based sectors of ice on decadal to centennial timescales.Finally, I develop a novel "time window" algorithm in a sea-level model to replace the classic algorithm of temporal discretization of the ice history in the model. This algorithm improves the computational efficiency of the model and thus allows for capturing the short-term scale interactions between ice sheets, solid Earth and sea level within glacial-cycle scale simulations with a coupled ice sheet - sea level model. I apply the new algorithm to simulate ice-sheet and sea-level variations globally over the past two glacial cycles and the future retreat of the Antarctic Ice Sheet due to anthropogenic climate warming between 1950-2500 CE. I show that using the time window algorithm reduces the total CPU calculation times by at least by 50% in both cases.Overall, I contribute to expanding the understanding of the interactions between GIA and ice sheets over broader spatiotemporal scales"--

The Ocean and Cryosphere in a Changing Climate

Author : Intergovernmental Panel on Climate Change (IPCC)
Publisher : Cambridge University Press
ISBN 13 : 9781009157971
Total Pages : 755 pages
Book Rating : 4.1/5 (579 download)

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Book Synopsis The Ocean and Cryosphere in a Changing Climate by : Intergovernmental Panel on Climate Change (IPCC)

Download or read book The Ocean and Cryosphere in a Changing Climate written by Intergovernmental Panel on Climate Change (IPCC) and published by Cambridge University Press. This book was released on 2022-04-30 with total page 755 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Intergovernmental Panel on Climate Change (IPCC) is the leading international body for assessing the science related to climate change. It provides policymakers with regular assessments of the scientific basis of human-induced climate change, its impacts and future risks, and options for adaptation and mitigation. This IPCC Special Report on the Ocean and Cryosphere in a Changing Climate is the most comprehensive and up-to-date assessment of the observed and projected changes to the ocean and cryosphere and their associated impacts and risks, with a focus on resilience, risk management response options, and adaptation measures, considering both their potential and limitations. It brings together knowledge on physical and biogeochemical changes, the interplay with ecosystem changes, and the implications for human communities. It serves policymakers, decision makers, stakeholders, and all interested parties with unbiased, up-to-date, policy-relevant information. This title is also available as Open Access on Cambridge Core.

Ocean Circulation and Climate

Author : John A. Church
Publisher : Elsevier Inc. Chapters
ISBN 13 : 0128058765
Total Pages : 82 pages
Book Rating : 4.1/5 (28 download)

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Book Synopsis Ocean Circulation and Climate by : John A. Church

Download or read book Ocean Circulation and Climate written by John A. Church and published by Elsevier Inc. Chapters. This book was released on 2013-10-22 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ocean has the largest heat capacity in the climate system and as a result the ocean plays a critical role in the climate. Changes in ocean heat content dominate the Earth’s energy storage; and the ocean’s thermal expansion has been a major contributor to sea-level rise in the twentieth century and likely to be the largest contributor in the twenty-first century. The agreement between changes in ocean heat storage over recent decades and changes in the Earth’s radiative balance, within uncertainties, provides strong support for current understanding of anthropogenic climate change. As a result of improvements in observations and modeling of sea level and components contributing to sea-level change, there is now an improved explanation for twentieth century sea-level rise. Models project a continuing sea-level rise during the twenty-first century and beyond. However, a number of uncertainties remain in our understanding of the global mean and regional distribution of sea-level rise resulting from changes in ocean circulation and changes in the Earth’s gravitational field. Ocean-ice-sheet interactions are important for quantitatively estimating future ice-sheet contributions to sea-level rise.

West Antarctic Ice Sheet Initiative: Science and implementation plan

Author : Robert A. Bindschadler
Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis West Antarctic Ice Sheet Initiative: Science and implementation plan by : Robert A. Bindschadler

Download or read book West Antarctic Ice Sheet Initiative: Science and implementation plan written by Robert A. Bindschadler and published by . This book was released on 1991 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Interaction of Ice Sheets with the Ocean and Atmosphere

Author : Carling Hay
Publisher :
ISBN 13 :
Total Pages : 238 pages
Book Rating : 4.:/5 (88 download)

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Book Synopsis The Interaction of Ice Sheets with the Ocean and Atmosphere by : Carling Hay

Download or read book The Interaction of Ice Sheets with the Ocean and Atmosphere written by Carling Hay and published by . This book was released on 2012 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Antarctic Climate Evolution

Author : Fabio Florindo
Publisher : Elsevier
ISBN 13 : 0080931618
Total Pages : 606 pages
Book Rating : 4.0/5 (89 download)

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Book Synopsis Antarctic Climate Evolution by : Fabio Florindo

Download or read book Antarctic Climate Evolution written by Fabio Florindo and published by Elsevier. This book was released on 2008-10-10 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antarctic Climate Evolution is the first book dedicated to furthering knowledge on the evolution of the world's largest ice sheet over its ~34 million year history. This volume provides the latest information on subjects ranging from terrestrial and marine geology to sedimentology and glacier geophysics. - An overview of Antarctic climate change, analyzing historical, present-day and future developments - Contributions from leading experts and scholars from around the world - Informs and updates climate change scientists and experts in related areas of study

Interaction of the East Antarctic Ice Sheet, Alpine Glaciations and Sea-level in the Wright Valley Area, Southern Victoria Land

Author : Parker Emerson Calkin
Publisher :
ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (465 download)

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Book Synopsis Interaction of the East Antarctic Ice Sheet, Alpine Glaciations and Sea-level in the Wright Valley Area, Southern Victoria Land by : Parker Emerson Calkin

Download or read book Interaction of the East Antarctic Ice Sheet, Alpine Glaciations and Sea-level in the Wright Valley Area, Southern Victoria Land written by Parker Emerson Calkin and published by . This book was released on 1972 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Melt Water Retention Processes in Snow and Firn on Ice Sheets and Glaciers: Observations and Modeling

Author : W. Tad Pfeffer
Publisher : Frontiers Media SA
ISBN 13 : 2889456196
Total Pages : 160 pages
Book Rating : 4.8/5 (894 download)

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Book Synopsis Melt Water Retention Processes in Snow and Firn on Ice Sheets and Glaciers: Observations and Modeling by : W. Tad Pfeffer

Download or read book Melt Water Retention Processes in Snow and Firn on Ice Sheets and Glaciers: Observations and Modeling written by W. Tad Pfeffer and published by Frontiers Media SA. This book was released on 2018-11-08 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Melt takes place where the surface of glaciers or ice sheets interacts with the atmosphere. While the processes governing surface melt are fairly well understood, the pathways of the meltwater, from its origin to the moment it leaves a glacier system, remain enigmatic. It is not even guaranteed that meltwater leaves a glacier or ice sheet. On Greenland, for example, only slightly more than 50% of the meltwater runs off. The remainder mostly refreezes within the so-called firn cover of the ice sheet. This eBook contains 11 studies which tackle the challenge of understanding meltwater retention in snow and firn from various angles. The studies focus both on mountain glaciers and on the Greenland ice sheet and address challenges such as measuring firn properties, quantifying their influence on meltwater retention, modelling firn processes and meltwater refreezing as well as unravelling the mechanisms within the recently discovered Greenland firn aquifers.

Sea Level Ice and Climatic Change

Author : Ian Allison
Publisher :
ISBN 13 :
Total Pages : 534 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Sea Level Ice and Climatic Change by : Ian Allison

Download or read book Sea Level Ice and Climatic Change written by Ian Allison and published by . This book was released on 1981 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of current ideas and recent results on the processes and the effects of interactions between sea level, ice, and climatic change on time scales of 100 to 10,000,000 years. Papers are grouped into two major sections: Ice and snow as elements in the weather and climate system and as indicators of change; and Features and interactions of sea level, ice and climate in the Quaternary.

Snow and Ice-Related Hazards, Risks, and Disasters

Author :
Publisher : Academic Press
ISBN 13 : 0123964733
Total Pages : 787 pages
Book Rating : 4.1/5 (239 download)

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Book Synopsis Snow and Ice-Related Hazards, Risks, and Disasters by :

Download or read book Snow and Ice-Related Hazards, Risks, and Disasters written by and published by Academic Press. This book was released on 2014-10-27 with total page 787 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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

Modeling Abrupt Change in Global Sea Level Arising from Ocean - Ice-Sheet Interaction

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (953 download)

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Book Synopsis Modeling Abrupt Change in Global Sea Level Arising from Ocean - Ice-Sheet Interaction by :

Download or read book Modeling Abrupt Change in Global Sea Level Arising from Ocean - Ice-Sheet Interaction written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: It is proposed to develop, validate, and apply a coupled ocean ice-sheet model to simulate possible, abrupt future change in global sea level. This research is to be carried out collaboratively between an academic institute and a Department of Energy Laboratory (DOE), namely, the PI and a graduate student at New York University (NYU) and climate model researchers at the Los Alamos National Laboratory (LANL). The NYU contribution is mainly in the area of incorporating new physical processes into the model, while the LANL efforts are focused on improved numerics and overall model development. NYU and LANL will work together on applying the model to a variety of modeling scenarios of recent past and possible near-future abrupt change to the configuration of the periphery of the major ice sheets. The project's ultimate goal is to provide a robust, accurate prediction of future global sea level change, a feat that no fully-coupled climate model is currently capable of producing. This proposal seeks to advance that ultimate goal by developing, validating, and applying a regional model that can simulate the detailed processes involved in sea-level change due to ocean ice-sheet interaction. Directly modeling ocean ice-sheet processes in a fully-coupled global climate model is not a feasible activity at present given the near-complete absence of development of any such causal mechanism in these models to date.

Polar Remote Sensing

Author : Robert Massom
Publisher : Springer Science & Business Media
ISBN 13 : 3540305653
Total Pages : 511 pages
Book Rating : 4.5/5 (43 download)

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Book Synopsis Polar Remote Sensing by : Robert Massom

Download or read book Polar Remote Sensing written by Robert Massom and published by Springer Science & Business Media. This book was released on 2006-08-31 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polar Remote Sensing is a two-volume work providing a comprehensive, multidisciplinary discussion of the applications of satellite sensing. Volume 2 focuses on the ice sheets, icebergs, and interactions between ice sheets and the atmosphere and ocean. It contains information about the applications of satellite remote sensing in all relevant polar related disciplines, including glaciology, meteorology, climate and radiation balance and oceanogaraphy. It also provides a brief review of the state-of-the-art of each discipline, including current issues and questions. Various passive and active remote sensor types are discussed, and the book then concentrates on specific geophysical applications. Its interdisciplinary approach means that major advances and publications are highlighted. Polar Remote Sensing: Ice Sheets summarizes fundamental principles of detectors, imaging and geophysical product retrieval includes a chapter on the important new field of satellite synthetic-aperture radar interferometry is a "one stop shop" for polar remote sensing information contains significant new information on the Earth's polar regions describes sophisticated groundbased remote sensing applications with specific reference to their use in polar regions.

Sea-Level Rise for the Coasts of California, Oregon, and Washington

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309255945
Total Pages : 274 pages
Book Rating : 4.3/5 (92 download)

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Book Synopsis Sea-Level Rise for the Coasts of California, Oregon, and Washington by : National Research Council

Download or read book Sea-Level Rise for the Coasts of California, Oregon, and Washington written by National Research Council and published by National Academies Press. This book was released on 2012-12-06 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tide gauges show that global sea level has risen about 7 inches during the 20th century, and recent satellite data show that the rate of sea-level rise is accelerating. As Earth warms, sea levels are rising mainly because ocean water expands as it warms; and water from melting glaciers and ice sheets is flowing into the ocean. Sea-level rise poses enormous risks to the valuable infrastructure, development, and wetlands that line much of the 1,600 mile shoreline of California, Oregon, and Washington. As those states seek to incorporate projections of sea-level rise into coastal planning, they asked the National Research Council to make independent projections of sea-level rise along their coasts for the years 2030, 2050, and 2100, taking into account regional factors that affect sea level. Sea-Level Rise for the Coasts of California, Oregon, and Washington: Past, Present, and Future explains that sea level along the U.S. west coast is affected by a number of factors. These include: climate patterns such as the El Niño, effects from the melting of modern and ancient ice sheets, and geologic processes, such as plate tectonics. Regional projections for California, Oregon, and Washington show a sharp distinction at Cape Mendocino in northern California. South of that point, sea-level rise is expected to be very close to global projections. However, projections are lower north of Cape Mendocino because the land is being pushed upward as the ocean plate moves under the continental plate along the Cascadia Subduction Zone. However, an earthquake magnitude 8 or larger, which occurs in the region every few hundred to 1,000 years, would cause the land to drop and sea level to suddenly rise.

Ice-Ocean Interactions in the Antarctic Slope Current

Author : Yidongfang Si
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (138 download)

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Book Synopsis Ice-Ocean Interactions in the Antarctic Slope Current by : Yidongfang Si

Download or read book Ice-Ocean Interactions in the Antarctic Slope Current written by Yidongfang Si and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Antarctic Slope Current (ASC) is a narrow and westward circulation feature that surrounds the Antarctic continental shelves. It regulates onshore ocean heat transport toward the Antarctic ice shelves and dense water outflow, playing an important role in global meridional overturning circulation, glacier melt, and sea level rise. Despite its significance to Earth's climate system, the circulation and heat transport around the Antarctic margins remain poorly understood due to the difficulties and expense in observation and modeling. In this work, the dynamics of the ASC and the ice-ocean interactions around the Antarctic margins are investigated using high-resolution process-oriented simulations. The key results are summarized as follows: (i) Due to topographic eddy suppression, almost no wind-input momentum is transferred vertically over the continental slope; as a result, sea ice horizontally redistributes the wind-input momentum away from the continental slope, playing a critical role in the momentum balance of the ASC. (ii) Melt-induced freshening of the coastal waters that are buoyant compared with the open ocean leads to increased eddy-driven shoreward heat flux, which implies a positive feedback in a warming climate that may cause further melt of ice shelves. (iii) The West Antarctic slope undercurrent originates from the cyclonic vorticity input by meltwater upwelling in the cavities of West Antarctic ice shelves, which drives warm Circumpolar Deep Water toward the glaciers; increased basal melt therefore strengthens the slope undercurrent and enhances onshore heat transport, which indicates another positive feedback that may accelerate future melt, potentially further destabilizing the West Antarctic Ice Sheet. The work in this dissertation advances the understanding of the ice-ocean system near the Antarctic margins and highlights previously unrecognized climate feedbacks that may be key to projecting future changes in Antarctic ice sheets and thus sea level rise. In addition, our results help guide future climate model development and future observations of near-Antarctic ocean heat flux and glacier melt.

Air-Ice-Ocean Interaction

Author : Miles McPhee
Publisher : Springer Science & Business Media
ISBN 13 : 0387783350
Total Pages : 218 pages
Book Rating : 4.3/5 (877 download)

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Book Synopsis Air-Ice-Ocean Interaction by : Miles McPhee

Download or read book Air-Ice-Ocean Interaction written by Miles McPhee and published by Springer Science & Business Media. This book was released on 2008-06-04 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: At a time when the polar regions are undergoing rapid and unprecedented change, understanding exchanges of momentum, heat and salt at the ice-ocean interface is critical for realistically predicting the future state of sea ice. By offering a measurement platform largely unaffected by surface waves, drifting sea ice provides a unique laboratory for studying aspects of geophysical boundary layer flows that are extremely difficult to measure elsewhere. This book draws on both extensive observations and theoretical principles to develop a concise description of the impact of stress, rotation, and buoyancy on the turbulence scales that control exchanges between the atmosphere and underlying ocean when sea ice is present. Several interesting and unique observational data sets are used to illustrate different aspects of ice-ocean interaction ranging from the impact of salt on melting in the Greenland Sea marginal ice zone, to how nonlinearities in the equation of state for seawater affect mixing in the Weddell Sea. The book’s content, developed from a series of lectures, may be appropriate additional material for upper-level undergraduates and first-year graduate students studying the geophysics of sea ice and planetary boundary layers.