Tropical North Atlantic Sea Surface Temperature Reconstruction For The Last 800 Years Using Mg Ca Ratios In Planktic Foraminifera

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Tropical North Atlantic Sea Surface Temperature Reconstruction for the Last 800 Years Using Mg/Ca Ratios in Planktic Foraminifera

Author : Matthew A. Abahazi
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (145 download)

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Book Synopsis Tropical North Atlantic Sea Surface Temperature Reconstruction for the Last 800 Years Using Mg/Ca Ratios in Planktic Foraminifera by : Matthew A. Abahazi

Download or read book Tropical North Atlantic Sea Surface Temperature Reconstruction for the Last 800 Years Using Mg/Ca Ratios in Planktic Foraminifera written by Matthew A. Abahazi and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global warming is an important scientific and cultural problem for our time. As such, determining the historical sea surface temperatures is critical to our understanding of past, present and future climate change. In order to assess the patterns of prior climate change and establish reliable records upon which future predictions of climate change can be based, it is necessary to measure and calibrate climate change proxies. The samples used for this study come from a 56.5 cm box core retrieved in 1990 from 450 m depth in the Cariaco basin. Consecutive 1mm-thick samples were taken and processed for the planktic foraminifera species Globigerina bulloides for Mg/Ca analyses to estimate sea-surface temperature (SSTs) during the winter/spring upwelling season. The Mg/Ca values were obtained using an ICP-AES and later used in comparison with historical instrumental records to derive an equation to reconstruct sea-surface temperatures during the last 800 years. The record derived from this core indicates a high amount of variability in sea-surface temperatures over this 800 year interval. The Medieval Warm Period had considerable temperature variability that was previously not well-documented. Average sea-surface temperatures over this time period are 26.2°C with slight cooling toward the end of the period. The Little Ice Age is marked by the coldest temperatures of the Late Holocene record, averaging approximately 25.6°C. The coldest period within the LIA is coincident with the Maunder Minimum in the core record. Modern temperatures as recorded by instrumental records and from the proxies recovered from the core is increasing at rates greater than they have in the past 800 years represented in this sediment-core record. This study is one of the first of its kind to present a high-resolution, sea surface temperature record for the tropics. The proxy equation can be used in the region to further delineate climate variability in the Late Holocene.

Evidence-Based Climate Science

Author : Don Easterbrook
Publisher : Elsevier
ISBN 13 : 0128045892
Total Pages : 434 pages
Book Rating : 4.1/5 (28 download)

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Book Synopsis Evidence-Based Climate Science by : Don Easterbrook

Download or read book Evidence-Based Climate Science written by Don Easterbrook and published by Elsevier. This book was released on 2016-09-16 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evidence-Based Climate Science: Data Opposing CO2 Emissions as the Primary Source of Global Warming, Second Edition, includes updated data related to the causes of global climate change from experts in meteorology, geology, atmospheric physics, solar physics, geophysics, climatology, and computer modeling. This book objectively gathers and analyzes scientific data concerning patterns of past climate changes, influences of changes in ocean temperatures, the effect of solar variation on global climate, and the effect of CO2 on global climate. This analysis is then presented as counter-evidence to the theory that CO2 is the primary cause behind global warming. Increasingly, scientists are pointing to data which suggests that climate changes are a result of natural cycles, which have been occurring for thousands of years. Unfortunately, global warming has moved into the political realm without enough peer-reviewed research to fully validate and exclude other, more natural, causes of climate change. For example, there is an absence of any physical evidence that CO2 causes global warming, so the only argument for CO2 as the cause of warming rests entirely in computer modeling. Thus, the question becomes, how accurate are the computer models in predicting climate? What other variables could be missing from the models? In order to understand modern climate changes, we need to look at the past history of climate changes. Vast amounts of physical evidence of climate change over the past centuries and millennia have been gathered by scientists. Significant climate changes have clearly been going on for many thousands of years, long before the recent rise in atmospheric CO2 Evidence-Based Climate Science, Data Opposing CO2 Emissions as the Primary Source of Global Warming, Second Edition, documents past climate changes and presents physical evidence for possible causes. - Provides scientific evidence for issues related to global climate change that is not readily available elsewhere - Offers detailed analysis of temperature measurements with the goal of helping readers to understand conflicting claims about global warming heard every day in the news media - Presents real-time data on polar ice - Presents the real-time effect of CO2 on global warming, rather than forecasts based on computer models

Surface Temperature Reconstructions for the Last 2,000 Years

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309102251
Total Pages : 160 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Surface Temperature Reconstructions for the Last 2,000 Years by : National Research Council

Download or read book Surface Temperature Reconstructions for the Last 2,000 Years written by National Research Council and published by National Academies Press. This book was released on 2007-01-05 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: In response to a request from Congress, Surface Temperature Reconstructions for the Last 2,000 Years assesses the state of scientific efforts to reconstruct surface temperature records for Earth during approximately the last 2,000 years and the implications of these efforts for our understanding of global climate change. Because widespread, reliable temperature records are available only for the last 150 years, scientists estimate temperatures in the more distant past by analyzing "proxy evidence," which includes tree rings, corals, ocean and lake sediments, cave deposits, ice cores, boreholes, and glaciers. Starting in the late 1990s, scientists began using sophisticated methods to combine proxy evidence from many different locations in an effort to estimate surface temperature changes during the last few hundred to few thousand years. This book is an important resource in helping to understand the intricacies of global climate change.

Use of Proxies in Paleoceanography

Author : Gerhard Fischer
Publisher : Springer Science & Business Media
ISBN 13 : 3642586465
Total Pages : 768 pages
Book Rating : 4.6/5 (425 download)

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Book Synopsis Use of Proxies in Paleoceanography by : Gerhard Fischer

Download or read book Use of Proxies in Paleoceanography written by Gerhard Fischer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paleoceanographic proxies provide infonnation for reconstructions of the past, including climate changes, global and regional oceanography, and the cycles of biochemical components in the ocean. These prox ies are measurable descriptors for desired but unobservable environmental variables such as tempera ture, salinity, primary productivity, nutrient content, or surface-water carbon dioxide concentrations. The proxies are employed in a manner analogous to oceanographic methods. The water masses are first characterized according to their specific physical and chemical properties, and then related to particular assemblages of certain organisms or to particular element or isotope distributions. We have a long-standing series of proven proxies available. Marine microfossil assemblages, for instance, are employed to reconstruct surface-water temperatures. The calcareous shells of planktonic and benthic microorgan isms contain a wealth of paleoceanographic information in their isotopic and elemental compositions. Stable oxygen isotope measurements are used to detennine ice volume, and MglCa ratios are related to water temperatures, to cite a few examples. Organic material may also provide valuable infonnation, e. g. , about past productivity conditions. Studying the stable carbon isotope composition of bulk organic matter or individual marine organic components may provide a measure of past surface-water CO 2 conditions within the bounds of certain assumptions. Within the scope of paleoceanographic investigations, the existing proxies are continuously evolving and improving, while new proxies are being studied and developed. The methodology is improved by analysis of samples from the water column and surface sediments, and through laboratory experiments.

Understanding Earth's Deep Past

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309209196
Total Pages : 153 pages
Book Rating : 4.3/5 (92 download)

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Book Synopsis Understanding Earth's Deep Past by : National Research Council

Download or read book Understanding Earth's Deep Past written by National Research Council and published by National Academies Press. This book was released on 2011-08-02 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Mathematical Methods for Oceanographers

Author : Edward A. Laws
Publisher : John Wiley & Sons
ISBN 13 : 9780471162216
Total Pages : 372 pages
Book Rating : 4.1/5 (622 download)

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Book Synopsis Mathematical Methods for Oceanographers by : Edward A. Laws

Download or read book Mathematical Methods for Oceanographers written by Edward A. Laws and published by John Wiley & Sons. This book was released on 1997-03-05 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dieses Buch erleichtert dem biologisch, chemisch oder geologisch interessierten Ozeanographen den Zugang zu den mathematischen Techniken, die er für seine tägliche Arbeit benötigt. Von den Grundlagen ausgehend, werden Methoden der Datenauswertung behandelt - lineare Regression, Korrelationsmethoden, Varianzanalyse, nichtlineare Techniken, numerische Integrationsverfahren und vieles andere mehr.

Boron Proxies in Paleoceanography and Paleoclimatology

Author : Bärbel Hönisch
Publisher : John Wiley & Sons
ISBN 13 : 1119010632
Total Pages : 241 pages
Book Rating : 4.1/5 (19 download)

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Book Synopsis Boron Proxies in Paleoceanography and Paleoclimatology by : Bärbel Hönisch

Download or read book Boron Proxies in Paleoceanography and Paleoclimatology written by Bärbel Hönisch and published by John Wiley & Sons. This book was released on 2019-05-13 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anthropogenic carbon dioxide emissions do not only warm our planet but also acidify our oceans. It is currently unclear to which degree Earth’s climate and marine life will be impacted by these changes but information from Earth history, particularly the geochemical signals of past environmental changes stored in the fossil remains of marine organisms, can help us predict possible future changes. This book aims to be a primer for scientists who seek to apply boron proxies in marine carbonates to estimate past seawater carbonate chemistry and atmospheric pCO2. Boron proxies (δ11B and B/Ca) were introduced nearly three decades ago, with subsequent strides being made in understanding their mechanistic functioning. This text reviews current knowledge about the aqueous systematics, the inorganic and biological controls on boron isotope fractionation and incorporation into marine carbonates, as well as the analytical techniques for measurement of boron proxies. Laboratory and field calibrations of the boron proxies are summarized, and similarities between modern calibrations are explored to suggest estimates for proxy sensitivities in marine calcifiers that are now extinct. Example applications illustrate the potential for reconstructing paleo-atmospheric pCO2 from boron isotopes. Also explored are the sensitivity of paleo-ocean acidity and pCO2 reconstructions to boron isotope proxy systematics that are currently less well understood, including the elemental and boron isotopic composition of seawater through time, seawater alkalinity, temperature and salinity, and their collective impact on the uncertainty of paleo-reconstructions. The B/Ca proxy is based on the same mechanistic principles as the boron isotope proxy, but empirical calibrations suggest seawater pH is not the only controlling factor. B/Ca therefore has the potential to provide a second carbonate parameter that could be paired with δ11B to fully constrain the ocean carbonate system, but the associated uncertainties are large. This text reviews and examines what is currently known about the B/Ca proxy systematics. As more scientists embark on characterizing past ocean acidity and atmospheric pCO2, Boron in Paleoceanography and Paleoclimatology provides a resource to introduce geoscientists to the opportunities and complications of boron proxies, including potential avenues to further refine them.

Productivity of the Ocean

Author : W. H. Berger
Publisher :
ISBN 13 :
Total Pages : 504 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Productivity of the Ocean by : W. H. Berger

Download or read book Productivity of the Ocean written by W. H. Berger and published by . This book was released on 1989-08-08 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents the proceedings of a Dahlem workshop held in Berlin, April 1988. Considers ocean mechanisms affecting the amount of atmospheric CO2 over thousands of years, especially fluctuating ocean productivity. Assesses the state-of-knowledge of the processes that lead to the export of organic matter from the ocean's photic zone, its transit to the sea floor, and its burial within the sediment. Also considers how to model atmospheric fluctuations of CO2 on medium to long time scales. Reveals how ocean productivity changes through time and how it can be reconstructed from the biogenous signals in the sediments. Illustrated.

Arctic Climate Change

Author : Peter Lemke
Publisher : Springer Science & Business Media
ISBN 13 : 9400720270
Total Pages : 473 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Arctic Climate Change by : Peter Lemke

Download or read book Arctic Climate Change written by Peter Lemke and published by Springer Science & Business Media. This book was released on 2011-11-22 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Arctic is now experiencing some of the most rapid and severe climate change on earth. Over the next 100 years, climate change is expected to accelerate, contributing to major physical, ecological, social, and economic changes, many of which have already begun. Changes in arctic climate will also affect the rest of the world through increased global warming and rising sea levels. The volume addresses the following major topics: - Research results in observing aspects of the Arctic climate system and its processes across a range of time and space scales - Representation of cryospheric, atmospheric, and oceanic processes in models, including simulation of their interaction with coupled models - Our understanding of the role of the Arctic in the global climate system, its response to large-scale climate variations, and the processes involved.

Planktic Foraminifers in the Modern Ocean

Author : Ralf Schiebel
Publisher : Springer
ISBN 13 : 9783662502952
Total Pages : 358 pages
Book Rating : 4.5/5 (29 download)

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Book Synopsis Planktic Foraminifers in the Modern Ocean by : Ralf Schiebel

Download or read book Planktic Foraminifers in the Modern Ocean written by Ralf Schiebel and published by Springer. This book was released on 2017-02-24 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the taxonomy, biology, sedimentation, and carbonate geochemistry of modern species. Students, early career and advanced scientists alike will profit from a broad synthesis of the current understanding of planktic foraminifers as an ecological indicator, biogeochemical factories, and proxies in paleoceanography. The classification of modern species is amply illustrated with electron and light microscope images of morphotypes, addresses the state-of-the-art of molecular genetics of species, and provides a detailed guide for any laboratory analyses. The biology of planktic foraminifers is extensively discussed in chapters dedicated to the cellular ultrastructure, nutrition, symbionts, reproduction, ontogeny, and test architecture. Building on the biological prerequisites, the distribution of planktic foraminifers is discussed at regional to global scale. The geochemistry and sedimentation of tests are considered in relation to the ecology of the living animal. In the final chapter, which examines the most common methods in planktic foraminifer research, hands-on information is provided on sampling, processing and analyzing samples in the laboratory, as well as selected established methods for data interpretation. The various topics discussed in this book are aimed at the application of planktic foraminifers as sensitive indicators of the changing climate and marine environment.

The Northern North Atlantic

Author : Priska Schäfer
Publisher : Springer Science & Business Media
ISBN 13 : 9783540672319
Total Pages : 520 pages
Book Rating : 4.6/5 (723 download)

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Book Synopsis The Northern North Atlantic by : Priska Schäfer

Download or read book The Northern North Atlantic written by Priska Schäfer and published by Springer Science & Business Media. This book was released on 2001-04-02 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: The northern North Atlantic is one of the regions most sensitive to past and present global changes. This book integrates the results of an interdisciplinary project studying the properties of the Greenland-Iceland-Norwegian Seas and the processes of pelagic and benthic particle formation, particle transport, and deposition in the deep-sea sediments. Ice-related and biogeochemical processes have been investigated to decipher the spatial and temporal variability of the production and fate of organic carbon in this region. Isotopic stratigraphy, microfossil assemblages and paleotemperatures are combined to reconstruct paleoceanographic conditions and to model past climatic changes in the Late Quaternary. The Greenland-Iceland-Norwegian Seas can now be considered one of the best studied subbasins of the world`s oceans.

Recent Foraminifera

Author : E. Boltovskoy
Publisher : Springer
ISBN 13 : 9789048185108
Total Pages : 515 pages
Book Rating : 4.1/5 (851 download)

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Book Synopsis Recent Foraminifera by : E. Boltovskoy

Download or read book Recent Foraminifera written by E. Boltovskoy and published by Springer. This book was released on 2010-12-25 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Indian Summer Monsoon Variability

Author : Jasti S. Chowdary
Publisher : Elsevier
ISBN 13 : 0128224320
Total Pages : 496 pages
Book Rating : 4.1/5 (282 download)

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Book Synopsis Indian Summer Monsoon Variability by : Jasti S. Chowdary

Download or read book Indian Summer Monsoon Variability written by Jasti S. Chowdary and published by Elsevier. This book was released on 2021-08-15 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indian Summer Monsoon Variability: El Niño-Teleconnections and Beyond presents the improved understanding of Indian Monsoon teleconnections (ENSO and Non-ENSO), new advances, and preferred future steps. Special emphasis is given to non-ENSO teleconnections which have been poorly understood for decades. With growing monsoon rainfall extremes across the Indian Subcontinent, a new understanding of monsoon environmental factors that are driven remotely through teleconnections is a trending topic. Finally, the book reviews current understanding ofthe observational and modeling aspects of Indian monsoon teleconnections. This is a must-read for researchers and graduate students in atmospheric science and meteorology. - Presents teleconnections associated with the Indian summer monsoon from a global perspective - Discusses new pathways that connect the remote drivers to Indian summer monsoon variability - Covers a wide range of mechanisms, processes, and science questions in relation to monsoon variability from interannual, decadal to climate change time scales

The Anthropocene as a Geological Time Unit

Author : Jan Zalasiewicz
Publisher : Cambridge University Press
ISBN 13 : 110847523X
Total Pages : 385 pages
Book Rating : 4.1/5 (84 download)

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Book Synopsis The Anthropocene as a Geological Time Unit by : Jan Zalasiewicz

Download or read book The Anthropocene as a Geological Time Unit written by Jan Zalasiewicz and published by Cambridge University Press. This book was released on 2019-03-07 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews the evidence underpinning the Anthropocene as a geological epoch written by the Anthropocene Working Group investigating it. The book discusses ongoing changes to the Earth system within the context of deep geological time, allowing a comparison between the global transition taking place today with major transitions in Earth history.

The Glacial World According to Wally

Author : Wallace S. Broecker
Publisher :
ISBN 13 :
Total Pages : 354 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis The Glacial World According to Wally by : Wallace S. Broecker

Download or read book The Glacial World According to Wally written by Wallace S. Broecker and published by . This book was released on 1995 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Modern Planktonic Foraminifera

Author : Christoph Hemleben
Publisher : Springer Science & Business Media
ISBN 13 : 1461235448
Total Pages : 374 pages
Book Rating : 4.4/5 (612 download)

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Book Synopsis Modern Planktonic Foraminifera by : Christoph Hemleben

Download or read book Modern Planktonic Foraminifera written by Christoph Hemleben and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a single volume, the authors bring together a review of current biological understanding of planktonic foraminifera and apply it to developments in sedimentology. With the growing interest in the shells of this class of protozoa as indicators of the history of the earth, revealed through the sedimentary record, a comprehensive analysis of the biology of contemporary foraminifera has become necessary. Main topics covered include Taxonomy, Collecting and Culture Methods, Cellular Ultrastructure, Host and Symbiont Relationships, Trophic Activity and Nutrition, Reproduction, Shell Ontogeny and Architecture, Ecology and Sedimentation and Settlement of Shells.

Biostratigraphic and Geological Significance of Planktonic Foraminifera

Author : Marcelle K. BouDagher-Fadel
Publisher : UCL Press
ISBN 13 : 1910634263
Total Pages : 320 pages
Book Rating : 4.9/5 (16 download)

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Book Synopsis Biostratigraphic and Geological Significance of Planktonic Foraminifera by : Marcelle K. BouDagher-Fadel

Download or read book Biostratigraphic and Geological Significance of Planktonic Foraminifera written by Marcelle K. BouDagher-Fadel and published by UCL Press. This book was released on 2015-10-02 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: The role of fossil planktonic foraminifera as markers for biostratigraphical zonation and correlation underpins most drilling of marine sedimentary sequences and is key to hydrocarbon exploration. The first - and only - book to synthesise the whole biostratigraphic and geological usefulness of planktonic foraminifera, Biostratigraphic and Geological Significance of Planktonic Foraminifera unifies existing biostratigraphic schemes and provides an improved correlation reflecting regional biogeographies.Renowned micropaleontologist Marcelle K. Boudagher-Fadel presents a comprehensive analysis of existing data on fossil planktonic foraminifera genera and their phylogenetic evolution in time and space. This important text, now in its Second Edition, is in considerable demand and is now being republished by UCL Press.