Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Shifting Ocean Carbonate Chemistry During The Eocene Oligocene Climate Transition PDF full book. Access full book title Shifting Ocean Carbonate Chemistry During The Eocene Oligocene Climate Transition.
| Author | : V.L. Peck |
| Publisher | : |
| Total Pages | : |
| Release | : 2010 |
| Genre | : |
| ISBN | : |
| Author | : National Research Council |
| Publisher | : National Academies Press |
| Total Pages | : 163 |
| Release | : 2010-10-14 |
| Genre | : Science |
| ISBN | : 030915359X |
The ocean has absorbed a significant portion of all human-made carbon dioxide emissions. This benefits human society by moderating the rate of climate change, but also causes unprecedented changes to ocean chemistry. Carbon dioxide taken up by the ocean decreases the pH of the water and leads to a suite of chemical changes collectively known as ocean acidification. The long term consequences of ocean acidification are not known, but are expected to result in changes to many ecosystems and the services they provide to society. Ocean Acidification: A National Strategy to Meet the Challenges of a Changing Ocean reviews the current state of knowledge, explores gaps in understanding, and identifies several key findings. Like climate change, ocean acidification is a growing global problem that will intensify with continued CO2 emissions and has the potential to change marine ecosystems and affect benefits to society. The federal government has taken positive initial steps by developing a national ocean acidification program, but more information is needed to fully understand and address the threat that ocean acidification may pose to marine ecosystems and the services they provide. In addition, a global observation network of chemical and biological sensors is needed to monitor changes in ocean conditions attributable to acidification.
| Author | : Genevieve Elsworth |
| Publisher | : |
| Total Pages | : |
| Release | : 2015 |
| Genre | : |
| ISBN | : |
"The Eocene-Oligocene transition (EOT) (~33.7 Ma) delineates the most abrupt shift from "greenhouse" to "icehouse" climates during the Cenozoic. At this time, substantial global cooling and the emplacement of the Antarctic ice sheet accompanied perturbations to the carbon cycle. Profound climatic reorganization across the EOT is often attributed to a decline in atmospheric pCO2; however, the mechanism behind this decrease is poorly understood. Considering the importance of atmospheric pCO2 drawdown for the emplacement of the Antarctic ice sheet, a more complete understanding of the controlling processes are required. The present study presents new and existing data compiled from globally distributed Ocean Drilling Program (ODP) Sites 689 (Maud Rise, Atlantic Sector of Southern Ocean), 744 (Kerguelen Plateau, Indian Sector of Southern Ocean), 925 (Ceara Rise, Western Equatorial Atlantic Ocean), 1090 (Agulhas Ridge, Southeastern Atlantic Ocean), and 1218 (Eastern Equatorial Pacific Ocean). A multi-proxy approach is applied to provide indications of silica availability (biogenic opal MAR), calcium carbonate compensation depth (carbonate MAR), biological surface export (BaEX MAR), and deep water oxygenation (MnEF and UEF). Trends in biogenic opal and carbonate deposition across the EOT suggest the weathering of both silicates and carbonates to exert control on ocean biogeochemistry on geologic timescales. A pulse of biogenic opal deposition is consistent with accelerated silicate weathering both in Antarctica and globally, while enhanced weathering of exposed carbonate shelves accompanied a deepening of the calcium carbonate compensation depth (CCD) across the EOT. The enhanced weathering of silicates and carbonates has implications for the drawdown of atmospheric pCO2 across the transition and emphasize the important role played by coupled Earth system feedbacks on climatic and oceanic reorganizations from the late Eocene to the early Oligocene." --
| Author | : Sam Bradley |
| Publisher | : |
| Total Pages | : 71 |
| Release | : 2010 |
| Genre | : |
| ISBN | : |
| Author | : Jean-Pierre Gattuso |
| Publisher | : OUP Oxford |
| Total Pages | : 347 |
| Release | : 2011-09-15 |
| Genre | : Science |
| ISBN | : 0191501786 |
The ocean helps moderate climate change thanks to its considerable capacity to store CO2, through the combined actions of ocean physics, chemistry, and biology. This storage capacity limits the amount of human-released CO2 remaining in the atmosphere. As CO2 reacts with seawater, it generates dramatic changes in carbonate chemistry, including decreases in pH and carbonate ions and an increase in bicarbonate ions. The consequences of this overall process, known as "ocean acidification", are raising concerns for the biological, ecological, and biogeochemical health of the world's oceans, as well as for the potential societal implications. This research level text is the first to synthesize the very latest understanding of the consequences of ocean acidification, with the intention of informing both future research agendas and marine management policy. A prestigious list of authors has been assembled, among them the coordinators of major national and international projects on ocean acidification.
| Author | : |
| Publisher | : ScholarlyEditions |
| Total Pages | : 536 |
| Release | : 2012-12-26 |
| Genre | : Science |
| ISBN | : 1464992630 |
Advances in Carbonic Acid Research and Application / 2012 Edition is a ScholarlyBrief™ that delivers timely, authoritative, comprehensive, and specialized information about Carbonic Acid in a concise format. The editors have built Advances in Carbonic Acid Research and Application / 2012 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Carbonic Acid in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Advances in Carbonic Acid Research and Application / 2012 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
| Author | : National Research Council |
| Publisher | : National Academies Press |
| Total Pages | : 153 |
| Release | : 2011-08-02 |
| Genre | : Science |
| ISBN | : 0309209196 |
There is little dispute within the scientific community that humans are changing Earth's climate on a decadal to century time-scale. By the end of this century, without a reduction in emissions, atmospheric CO2 is projected to increase to levels that Earth has not experienced for more than 30 million years. As greenhouse gas emissions propel Earth toward a warmer climate state, an improved understanding of climate dynamics in warm environments is needed to inform public policy decisions. In Understanding Earth's Deep Past, the National Research Council reports that rocks and sediments that are millions of years old hold clues to how the Earth's future climate would respond in an environment with high levels of atmospheric greenhouse gases. Understanding Earth's Deep Past provides an assessment of both the demonstrated and underdeveloped potential of the deep-time geologic record to inform us about the dynamics of the global climate system. The report describes past climate changes, and discusses potential impacts of high levels of atmospheric greenhouse gases on regional climates, water resources, marine and terrestrial ecosystems, and the cycling of life-sustaining elements. While revealing gaps in scientific knowledge of past climate states, the report highlights a range of high priority research issues with potential for major advances in the scientific understanding of climate processes. This proposed integrated, deep-time climate research program would study how climate responded over Earth's different climate states, examine how climate responds to increased atmospheric carbon dioxide and other greenhouse gases, and clarify the processes that lead to anomalously warm polar and tropical regions and the impact on marine and terrestrial life. In addition to outlining a research agenda, Understanding Earth's Deep Past proposes an implementation strategy that will be an invaluable resource to decision-makers in the field, as well as the research community, advocacy organizations, government agencies, and college professors and students.
| Author | : Donald R. Prothero |
| Publisher | : Columbia University Press |
| Total Pages | : 558 |
| Release | : 2003 |
| Genre | : Eocene-Oligocene boundary |
| ISBN | : 0231127162 |
The marine Eocene-Oligocene transition of 34 million years ago was a critical turning point in Earth's climatic history, when the warm, high-diversity "greenhouse" world of the early Eocene ceded to the glacial, "icehouse" conditions of the early Oligocene. This book surveys the advances in stratigraphic and paleontological research and isotopic analysis made since 1989 in regard to marine deposits around the world. In particular, it summarizes the high-resolution details of the so-called doubthouse interval (roughly 45 to 34 million years ago), which is critical to testing climatic and evolutionary hypotheses about the Eocene deterioration. The authors' goals are to discuss the latest information concerning climatic and oceanographic change associated with this transition and to examine geographic and taxonomic patterns in biotic turnover that provide clues about where, when, and how fast these environmental changes happened. They address a range of topics, including the tectonic and paleogeographic setting of the Paleogene; specific issues related to the stratigraphy of shelf deposits; advances in recognizing and correlating boundary sections; trends in the expression of climate change; and patterns of faunal and floral turnover. In the process, they produce a valuable synthesis of patterns of change by latitude and environment.
| Author | : Maria Mutti |
| Publisher | : John Wiley & Sons |
| Total Pages | : 498 |
| Release | : 2011-09-14 |
| Genre | : Science |
| ISBN | : 1444348353 |
The Oligocene and Miocene Epochs comprise the most important phases in the Cenozoic global cooling that led from a greenhouse to an icehouse Earth. Recent major advances in the understanding and time-resolution of climate events taking place at this time, as well as the proliferation of studies on Oligocene and Miocene shallow-water/neritic carbonate systems, invite us to re-evaluate the significance of these carbonate systems in the context of changes in climate and Earth surface processes. Carbonate systems, because of a wide dependence on the ecological requirements of organisms producing the sediment, are sensitive recorders of changes in environmental conditions on the Earth surface. The papers included in this Special Publication address the dynamic evolution of carbonate systems deposited during the Oligocene and Miocene in the context on climatic and Earth surfaces processes focusing on climatic trends and controls over deposition; temporal changes in carbonate producers and palaeoecology; carbonate terminology; facies; processes and environmental parameters (including water temperature and production depth profiles); carbonate producers and their spatial and temporal variability; and tectonic controls over architecture. This book is part of the International Association of Sedimentologists (IAS) Special Publications. The Special Publications from the IAS are a set of thematic volumes edited by specialists on subjects of central interest to sedimentologists. Papers are reviewed and printed to the same high standards as those published in the journal Sedimentology and several of these volumes have become standard works of reference.
| Author | : Chandranath Basak |
| Publisher | : |
| Total Pages | : |
| Release | : 2011 |
| Genre | : |
| ISBN | : |
Major climate change is frequently associated with readjustment of carbon sources and sinks. The ocean is a relatively large carbon sink that can exchange carbon with the atmosphere over geologically short time scales. Chemical weathering of continental silicate rocks also plays a key role in sequestering atmospheric carbon over geologically long time scale. Therefore, the interplay between physical and chemical continental weathering can have major implications for the long term carbon budget of the Earth.
