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  • 1
    Online Resource
    Online Resource
    Paleoclimatology (2021)
    Cham :Springer International Publishing :
    Details
    Keywords: Environment. ; Paleontology . ; Physical geography. ; Geology. ; Environmental Sciences. ; Paleontology. ; Earth System Sciences. ; Geology.
    Description / Table of Contents: 1. The climate system: its functioning and history -- 2. The changing face of the Earth throughout the ages -- 3. Introduction to geochronology -- 4. Carbon-14.
    Abstract: This two-volume book provides a comprehensive, detailed understanding of paleoclimatology beginning by describing the “proxy data” from which quantitative climate parameters are reconstructed and finally by developing a comprehensive Earth system model able to simulate past climates of the Earth. It compiles contributions from specialists in each field who each have an in-depth knowledge of their particular area of expertise. The first volume is devoted to “Finding, dating and interpreting the evidence”. It describes the different geo-chronological technical methods used in paleoclimatology. Different fields of geosciences such as: stratigraphy, magnetism, dendrochronology, sedimentology, are drawn from and proxy reconstructions from ice sheets, terrestrial (speleothems, lakes, and vegetation) and oceanic data, are used to reconstruct the ancient climates of the Earth. The second volume, entitled “Investigation into ancient climates,” focuses on building comprehensive models of past climate evolution. The chapters are based on understanding the processes driving the evolution of each component of the Earth system (atmosphere, ocean, ice). This volume provides both an analytical understanding of each component using a hierarchy of models (from conceptual to very sophisticated 3D general circulation models) and a synthetic approach incorporating all of these components to explore the evolution of the Earth as a global system. As a whole this book provides the reader with a complete view of data reconstruction and modeling of the climate of the Earth from deep time to present day with even an excursion to include impacts on future climate.
    Type of Medium: Online Resource
    Pages: XXIV, 478 p. 262 illus., 121 illus. in color. , online resource.
    Edition: 1st ed. 2021.
    ISBN: 9783030249823
    Series Statement: Frontiers in Earth Sciences,
    URL: https://doi.org/10.1007/978-3-030-24982-3
    DOI: 10.1007/978-3-030-24982-3
    DDC: 333.7
    Language: English
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  • 2
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    Paleoclimatology (2021)
    Cham : Springer
    Details
    Call number: 9783030249823 (e-book)
    Description / Table of Contents: This two-volume book provides a comprehensive, detailed understanding of paleoclimatology beginning by describing the “proxy data” from which quantitative climate parameters are reconstructed and finally by developing a comprehensive Earth system model able to simulate past climates of the Earth. It compiles contributions from specialists in each field who each have an in-depth knowledge of their particular area of expertise. The first volume is devoted to “Finding, dating and interpreting the evidence”. It describes the different geo-chronological technical methods used in paleoclimatology. Different fields of geosciences such as: stratigraphy, magnetism, dendrochronology, sedimentology, are drawn from and proxy reconstructions from ice sheets, terrestrial (speleothems, lakes, and vegetation) and oceanic data, are used to reconstruct the ancient climates of the Earth. The second volume, entitled “Investigation into ancient climates,” focuses on building comprehensive models of past climate evolution. The chapters are based on understanding the processes driving the evolution of each component of the Earth system (atmosphere, ocean, ice). This volume provides both an analytical understanding of each component using a hierarchy of models (from conceptual to very sophisticated 3D general circulation models) and a synthetic approach incorporating all of these components to explore the evolution of the Earth as a global system. As a whole this book provides the reader with a complete view of data reconstruction and modeling of the climate of the Earth from deep time to present day with even an excursion to include impacts on future climate.
    Type of Medium: 12
    Pages: 1 Online-Ressource (xxiv, 478 Seiten) , Illustrationen, Diagramme
    ISBN: 9783030249823 , 978-3-030-24982-3
    ISSN: 1863-4621 , 1863-463X
    Series Statement: Frontiers in earth sciences
    URL: Ebook (access only within the AWI network)
    Language: English
    Note: Contents Volume 1 1 The Climate System: Its Functioning and History / Sylvie Joussaume and Jean-Claude Duplessy 2 The Changing Face of the Earth Throughout the Ages / Frédéric Fluteau and Pierre Sepulchre 3 Introduction to Geochronology / Hervé Guillou 4 Carbon-14 / Martine Paterne, Élisabeth Michel, and Christine Hatté et Jean-Claude Dutay 5 The 40 K/ 40 Ar and 40 Ar/ 39 Ar Methods / Hervé Guillou, Sébastien Nomade, and Vincent Scao 6 Dating of Corals and Other Geological Samples via the Radioactive Disequilibrium of Uranium and Thorium Isotopes / Norbert Frank and Freya Hemsing 7 Magnetostratigraphy: From a Million to a Thousand Years / Carlo Laj, James E. T. Channell, and Catherine Kissel 8 Dendrochronology / Frédéric Guibal and Joël Guiot 9 The Dating of Ice-Core Archives / Frédéric Parrenin 10 Reconstructing the Physics and Circulation of the Atmosphere / Valérie Masson-Delmotte and Joël Guiot 11 Air-Ice Interface: Polar Ice / Valérie Masson-Delmotte and Jean Jouzel 12 Air-Vegetation Interface: Pollen / Joël Guiot 13 Ground-Air Interface: The Loess Sequences, Markers of Atmospheric Circulation / Denis-Didier Rousseau and Christine Hatté 14 Air-Ground Interface: Reconstruction of Paleoclimates Using Speleothems / Dominique Genty and Ana Moreno 15 Air-Interface: d18O Records of Past Meteoric Water Using Benthic Ostracods from Deep Lakes / Ulrich von Grafenstein and Inga Labuhn 16 Vegetation-Atmosphere Interface: Tree Rings / Joël Guiot and Valérie Daux 17 Air-Vegetation Interface: An Example of the Use of Historical Data on Grape Harvests / Valérie Daux 18 Air-Ground Interface: Sediment Tracers in Tropical Lakes / David Williamson 19 Air-water Interface: Tropical Lake Diatoms and Isotope Hydrology Modeling / Florence Sylvestre, Françoise Gasse, Françoise Vimeux, and Benjamin Quesada 20 Air-Ice Interface: Tropical Glaciers / Françoise Vimeux 21 Climate and the Evolution of the Ocean: The Paleoceanographic Data / Thibaut Caley, Natalia Vázquez Riveiros, Laurent Labeyrie, Elsa Cortijo, and Jean-Claude Duplessy Volume 2 22 Climate Evolution on the Geological Timescale and the Role of Paleogeographic Changes / Frédéric Fluteau and Pierre Sepulchre 23 Biogeochemical Cycles and Aerosols Over the Last Million Years / Nathaelle Bouttes, Laurent Bopp, Samuel Albani, Gilles Ramstein, Tristan Vadsaria, and Emilie Capron 24 The Cryosphere and Sea Level / Catherine Ritz, Vincent Peyaud, Claire Waelbroeck, and Florence Colleoni 25 Modeling and Paleoclimatology / Masa Kageyama and Didier Paillard 26 The Precambrian Climate / Yves Goddéris, Gilles Ramstein, and Guillaume Le Hir 27 The Phanerozoic Climate / Yves Goddéris, Yannick Donnadieu, and Alexandre Pohl 28 Climate and Astronomical Cycles / Didier Paillard 29 Rapid Climate Variability: Description and Mechanisms / Masa Kageyama, Didier M. Roche, Nathalie Combourieu Nebout, and Jorge Alvarez-Solas 30 An Introduction to the Holocene and Anthropic Disturbance / Pascale Braconnot and Pascal Yiou 31 From the Climates of the Past to the Climates of the Future / Sylvie Charbit, Nathaelle Bouttes, Aurélien Quiquet, Laurent Bopp, Gilles Ramstein, Jean-Louis Dufresne, and Julien Cattiaux
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  • 3
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    Carbon isotopes and Pa∕Th response to forced circulation changes: a model perspective (2020)
    Copernicus
    Details
    Publication Date: 2020-05-19
    Description: Understanding the ocean circulation changes associated with abrupt climate events is key to better assessing climate variability and understanding its different natural modes. Sedimentary Pa∕Th, benthic δ13C and Δ14C are common proxies used to reconstruct past circulation flow rate and ventilation. To overcome the limitations of each proxy taken separately, a better approach is to produce multiproxy measurements on a single sediment core. Yet, different proxies can provide conflicting information about past ocean circulation. Thus, modelling them in a consistent physical framework has become necessary to assess the geographical pattern and the timing and sequence of the multiproxy response to abrupt circulation changes. We have implemented a representation of the 231Pa and 230Th tracers into the model of intermediate complexity iLOVECLIM, which already included δ13C and Δ14C. We have further evaluated the response of these three ocean circulation proxies to a classical abrupt circulation reduction obtained by freshwater addition in the Nordic Seas under preindustrial boundary conditions. The proxy response is shown to cluster in modes that resemble the modern Atlantic water masses. The clearest and most coherent response is obtained in the deep (〉 2000 m) northwest Atlantic, where δ13C and Δ14C significantly decrease, while Pa∕Th increases. This is consistent with observational data across millennial-scale events of the last glacial. Interestingly, while in marine records, except in rare instances, the phase relationship between these proxies remains unclear due to large dating uncertainties, in the model the bottom water carbon isotope (δ13C and Δ14C) response lags behind the sedimentary Pa∕Th response by a few hundred years.
    Print ISSN: 1814-9324
    Electronic ISSN: 1814-9332
    Topics: Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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  • 4
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    Modelling the impact of biogenic particle flux intensity and composition on sedimentary Pa/Th (2020)
    Elsevier
    Details
    Publication Date: 2020-07-01
    Print ISSN: 0277-3791
    Electronic ISSN: 1873-457X
    Topics: Geography , Geosciences
    Published by Elsevier
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  • 5
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    Nonlinear regional warming with increasing CO2 concentrations (2015)
    Springer Nature
    Details
    Publication Date: 2015-01-26
    Print ISSN: 1758-678X
    Electronic ISSN: 1758-6798
    Topics: Geosciences
    Published by Springer Nature
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  • 6
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    Erratum: Corrigendum: Nonlinear regional warming with increasing CO2 concentrations (2015)
    Springer Nature
    Details
    Publication Date: 2015-02-25
    Print ISSN: 1758-678X
    Electronic ISSN: 1758-6798
    Topics: Geosciences
    Published by Springer Nature
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  • 7
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    Response of the carbon cycle to the different orbital configurations of the last 9 interglacials (2016)
    Copernicus
    Details
    Publication Date: 2016-11-08
    Description: Atmospheric CO2 levels during interglacials prior to the Mid Bruhnes Event (MBE, ~ 430 ka BP) have lower values of around 40 ppm than after the MBE. The reasons for this difference remain unclear. A recent hypothesis proposed that changes in oceanic circulation, in response to differences in external forcing before and after the MBE, might have increased the ocean carbon storage and thus explained the lower CO2. Nevertheless, no quantitative estimate of this hypothesis has been produced up to now. Here we use an intermediate complexity model including the carbon cycle to evaluate the response of the carbon reservoirs in the atmosphere, ocean and land in response to the changes of orbital forcings and atmospheric CO2 concentrations over the nine last interglacials. We show that the ocean takes up more carbon during pre-MBE interglacials in agreement with data, but the impact on atmospheric CO2 is limited to a few ppm. Terrestrial biosphere is simulated to be less developed in pre-MBE interglacials, which reduces the storage of carbon on land and increases atmospheric CO2. Accounting for different simulated ice sheet extents modifies the vegetation cover and temperature, and thus the carbon reservoir distribution. Overall, atmospheric CO2 is slightly smaller in these pre-MBE simulated interglacials including ice sheet variations, but the magnitude is still far too small. These results suggest a possible mis-representation of some key processes in the model, such as the magnitude of ocean circulation changes, or the lack of crucial mechanisms or internal feedbacks, such as those related to permafrost, that could explain the lower atmospheric CO2 concentrations during pre-MBE interglacials.
    Print ISSN: 1814-9340
    Electronic ISSN: 1814-9359
    Topics: Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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  • 8
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    A coupled model for carbon and radiocarbon evolution during the last deglaciation (2016)
    American Geophysical Union
    Details
    Publication Date: 2016-02-13
    Print ISSN: 0094-8276
    Electronic ISSN: 1944-8007
    Topics: Geosciences , Physics
    Published by American Geophysical Union
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  • 9
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    The Flux-Anomaly-Forced Model Intercomparison Project (FAFMIP) contribution to CMIP6: investigation of sea-level and ocean climate change in response to CO2 forcing (2016)
    Copernicus
    Details
    Publication Date: 2016-11-09
    Description: The Flux-Anomaly-Forced Model Intercomparison Project (FAFMIP) aims to investigate the spread in simulations of sea-level and ocean climate change in response to CO2 forcing by atmosphere–ocean general circulation models (AOGCMs). It is particularly motivated by the uncertainties in projections of ocean heat uptake, global-mean sea-level rise due to thermal expansion and the geographical patterns of sea-level change due to ocean density and circulation change. FAFMIP has three tier-1 experiments, in which prescribed surface flux perturbations of momentum, heat and freshwater respectively are applied to the ocean in separate AOGCM simulations. All other conditions are as in the pre-industrial control. The prescribed fields are typical of pattern and magnitude of changes in these fluxes projected by AOGCMs for doubled CO2 concentration. Five groups have tested the experimental design with existing AOGCMs. Their results show diversity in the pattern and magnitude of changes, with some common qualitative features. Heat and water flux perturbation cause the dipole in sea-level change in the North Atlantic, while momentum and heat flux perturbation cause the gradient across the Antarctic Circumpolar Current. The Atlantic meridional overturning circulation (AMOC) declines in response to the heat flux perturbation, and there is a strong positive feedback on this effect due to the consequent cooling of sea-surface temperature in the North Atlantic, which enhances the local heat input to the ocean. The momentum and water flux perturbations do not substantially affect the AMOC. Heat is taken up largely as a passive tracer in the Southern Ocean, which is the region of greatest heat input, while the weakening of the AMOC causes redistribution of heat towards lower latitudes. Future analysis of these and other phenomena with the wider range of CMIP6 FAFMIP AOGCMs will benefit from new diagnostics of temperature and salinity tendencies, which will enable investigation of the model spread in behaviour in terms of physical processes as formulated in the models.
    Print ISSN: 1991-959X
    Electronic ISSN: 1991-9603
    Topics: Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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  • 10
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    Carbon isotopes and Pa / Th response to forced circulation changes: a model perspective (2019)
    Copernicus
    Details
    Publication Date: 2019-04-23
    Description: Understanding the ocean circulation changes associated with last glacial abrupt climate events is key to better assess climate variability and understand its different natural modes. Sedimentary Pa / Th, benthic δ13C and Δ14C are common proxies used to reconstruct past circulation flow rate and ventilation. To overcome the limitations of each proxy taken separately, a better approach is to produce multi-proxy measurements on a single sediment core. Yet, different proxies can provide conflicting information about past ocean circulation. Thus, modelling them in a consistent physical framework has become necessary to assess the geographical pattern, the timing and sequence of the multi-proxy response to abrupt circulation changes. We have implemented a representation of the 231Pa and 230Th tracers into the model of intermediate complexity iLOVECLIM, which already included δ13C and Δ14C. We have further evaluated the response of these three ocean circulation proxies to a classical abrupt circulation reduction obtained by freshwater addition in the Nordic seas under preindustrial boundary conditions. Without a priori guess, the proxy response is shown to cluster in modes that resemble the modern Atlantic water masses. The clearest and most coherent response is obtained in the deep (〉 2,000 m) Northwest Atlantic, where δ13C and Δ14C significantly decrease while Pa / Th increases. This is consistent with observational data across millennial scale events of the last glacial. Interestingly, while in marine records, except in rare instances, the phase relationship between these proxies remains unclear due to large dating uncertainties, in the model the bottom water carbon isotopes (δ13C and Δ14C) response lags the sedimentary Pa / Th response by a few hundred years.
    Print ISSN: 1814-9340
    Electronic ISSN: 1814-9359
    Topics: Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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