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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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    IPSL-CM5A2 – an Earth system model designed for multi-millennial climate simulations (2020)
    Copernicus
    Details
    Publication Date: 2020-07-08
    Description: Based on the fifth phase of the Coupled Model Intercomparison Project (CMIP5)-generation previous Institut Pierre Simon Laplace (IPSL) Earth system model, we designed a new version, IPSL-CM5A2, aiming at running multi-millennial simulations typical of deep-time paleoclimate studies. Three priorities were followed during the setup of the model: (1) improving the overall model computing performance, (2) overcoming a persistent cold bias depicted in the previous model generation and (3) making the model able to handle the specific continental configurations of the geological past. These developments include the integration of hybrid parallelization Message Passing Interface – Open Multi-Processing (MPI-OpenMP) in the atmospheric model of the Laboratoire de Météorologie Dynamique (LMDZ), the use of a new library to perform parallel asynchronous input/output by using computing cores as “I/O servers” and the use of a parallel coupling library between the ocean and the atmospheric components. The model, which runs with an atmospheric resolution of 3.75∘×1.875∘ and 2 to 0.5∘ in the ocean, can now simulate ∼100 years per day, opening new possibilities towards the production of multi-millennial simulations with a full Earth system model. The tuning strategy employed to overcome a persistent cold bias is detailed. The confrontation of a historical simulation to climatological observations shows overall improved ocean meridional overturning circulation, marine productivity and latitudinal position of zonal wind patterns. We also present the numerous steps required to run IPSL-CM5A2 for deep-time paleoclimates through a preliminary case study for the Cretaceous. Namely, specific work on the ocean model grid was required to run the model for specific continental configurations in which continents are relocated according to past paleogeographic reconstructions. By briefly discussing the spin-up of such a simulation, we elaborate on the requirements and challenges awaiting paleoclimate modeling in the next years, namely finding the best trade-off between the level of description of the processes and the computing cost on supercomputers.
    Print ISSN: 1991-959X
    Electronic ISSN: 1991-9603
    Topics: Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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  • 4
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    Tectonic-driven climate change and the diversification of angiosperms (2014)
    National Academy of Sciences
    Details
    Publication Date: 2014-09-15
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 5
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    The origin of Asian monsoons: a modelling perspective (2020)
    Copernicus
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    Publication Date: 2020-05-08
    Description: The Cenozoic inception and development of the Asian monsoons remain unclear and have generated much debate, as several hypotheses regarding circulation patterns at work in Asia during the Eocene have been proposed in the few last decades. These include (a) the existence of modern-like monsoons since the early Eocene; (b) that of a weak South Asian monsoon (SAM) and little to no East Asian monsoon (EAM); or (c) a prevalence of the Intertropical Convergence Zone (ITCZ) migrations, also referred to as Indonesian–Australian monsoon (I-AM). As SAM and EAM are supposed to have been triggered or enhanced primarily by Asian palaeogeographic changes, their possible inception in the very dynamic Eocene palaeogeographic context remains an open question, both in the modelling and field-based communities. We investigate here Eocene Asian climate conditions using the IPSL-CM5A2 (Sepulchre et al., 2019) earth system model and revised palaeogeographies. Our Eocene climate simulation yields atmospheric circulation patterns in Asia substantially different from modern conditions. A large high-pressure area is simulated over the Tethys ocean, which generates intense low tropospheric winds blowing southward along the western flank of the proto-Himalayan–Tibetan plateau (HTP) system. This low-level wind system blocks, to latitudes lower than 10∘ N, the migration of humid and warm air masses coming from the Indian Ocean. This strongly contrasts with the modern SAM, during which equatorial air masses reach a latitude of 20–25∘ N over India and southeastern China. Another specific feature of our Eocene simulation is the widespread subsidence taking place over northern India in the midtroposphere (around 5000 m), preventing deep convective updraught that would transport water vapour up to the condensation level. Both processes lead to the onset of a broad arid region located over northern India and over the HTP. More humid regions of high seasonality in precipitation encircle this arid area, due to the prevalence of the Intertropical Convergence Zone (ITCZ) migrations (or Indonesian–Australian monsoon, I-AM) rather than monsoons. Although the existence of this central arid region may partly result from the specifics of our simulation (model dependence and palaeogeographic uncertainties) and has yet to be confirmed by proxy records, most of the observational evidence for Eocene monsoons are located in the highly seasonal transition zone between the arid area and the more humid surroundings. We thus suggest that a zonal arid climate prevailed over Asia before the initiation of monsoons that most likely occurred following Eocene palaeogeographic changes. Our results also show that precipitation seasonality should be used with caution to infer the presence of a monsoonal circulation and that the collection of new data in this arid area is of paramount importance to allow the debate to move forward.
    Print ISSN: 1814-9324
    Electronic ISSN: 1814-9332
    Topics: Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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  • 6
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    Presentation and Evaluation of the IPSL‐CM6A‐LR Climate Model (2020)
    American Geophysical Union
    Details
    Publication Date: 2020-07-01
    Electronic ISSN: 1942-2466
    Topics: Geography , Geosciences
    Published by American Geophysical Union
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  • 7
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    Exploring the floristic diversity of tropical Africa (2017)
    BioMed Central
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    Publication Date: 2017-03-07
    Electronic ISSN: 1741-7007
    Topics: Biology
    Published by BioMed Central
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  • 8
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    Revised paleoaltimetry data show low Tibetan Plateau elevation during the Eocene (2019)
    American Association for the Advancement of Science
    Details
    Publication Date: 2019-02-28
    Description: Paleotopographic reconstructions of the Tibetan Plateau based on stable isotope paleoaltimetry methods conclude that most of the Plateau’s current elevation was already reached by the Eocene, ~40 million years ago. However, changes in atmospheric and hydrological dynamics affect oxygen stable isotopes in precipitation and may thus bias such reconstructions. We used an isotope-equipped general circulation model to assess the influence of changing Eocene paleogeography and climate on paleoelevation estimates. Our simulations indicate that stable isotope paleoaltimetry methods are not applicable in Eocene Asia because of a combination of increased convective precipitation, mixture of air masses, and widespread aridity. Rather, a model-data comparison suggests that the Tibetan Plateau only reached low to moderate (less than 3000 meters) elevations during the Eocene, reconciling oxygen isotope data with other proxies.
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science
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  • 9
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    Evidence of Sundaland’s subsidence requires revisiting its biogeography (2020)
    Wiley
    Details
    Publication Date: 2020-04-01
    Print ISSN: 0305-0270
    Electronic ISSN: 1365-2699
    Topics: Biology , Geography
    Published by Wiley
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  • 10
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    Intensified Atlantic vs. weakened Pacific meridional overturning circulations in response to Tibetan Plateau uplift (2017)
    Copernicus
    Details
    Publication Date: 2017-10-12
    Description: The role of the Tibetan Plateau (TP) in maintaining large-scale overturning circulation in the Atlantic and Pacific is investigated using a coupled atmosphere–ocean model. For the present day with a realistic topography, model simulation shows a strong Atlantic meridional overturning circulation (AMOC) but a near absence of a Pacific meridional overturning circulation (PMOC), which is in good agreement with present observations. In contrast, the simulation without the TP depicts a collapsed AMOC and a strong PMOC that dominates deep water formation. The switch in deep water formation between the two basins results from changes in the large-scale atmospheric circulation and atmosphere–ocean feedback in the Atlantic and Pacific. The intensified westerly winds and increased freshwater flux over the North Atlantic cause an initial slowdown of the AMOC, but the weakened East Asian monsoon circulation and associated decreased freshwater flux over the North Pacific enhance initial intensification of the PMOC. The further decreased heat flux and the associated increase in sea-ice fraction promote the final AMOC collapse over the Atlantic, while the further increased heat flux leads to the final PMOC establishment over the Pacific. Although the simulations were done in a cold world, it still importantly implicates that the uplift of the TP alone could have been a potential driver for the reorganization of PMOC–AMOC between the Late Eocene and Early Oligocene.
    Print ISSN: 1814-9340
    Electronic ISSN: 1814-9359
    Topics: Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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