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  • 1
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    Nature Publishing Group (NPG)
    Publication Date: 2011-11-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aimers, James -- Hodell, David -- England -- Nature. 2011 Nov 2;479(7371):44-5. doi: 10.1038/479044a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22051668" target="_blank"〉PubMed〈/a〉
    Keywords: Archaeology ; Central America ; Disasters/*history ; Droughts/*history ; Geography ; History, Ancient ; Mexico ; Paleontology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2012-08-11
    Description: Earth's climate underwent a fundamental change between 1250 and 700 thousand years ago, the mid-Pleistocene transition (MPT), when the dominant periodicity of climate cycles changed from 41 thousand to 100 thousand years in the absence of substantial change in orbital forcing. Over this time, an increase occurred in the amplitude of change of deep-ocean foraminiferal oxygen isotopic ratios, traditionally interpreted as defining the main rhythm of ice ages although containing large effects of changes in deep-ocean temperature. We have separated the effects of decreasing temperature and increasing global ice volume on oxygen isotope ratios. Our results suggest that the MPT was initiated by an abrupt increase in Antarctic ice volume 900 thousand years ago. We see no evidence of a pattern of gradual cooling, but near-freezing temperatures occur at every glacial maximum.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Elderfield, H -- Ferretti, P -- Greaves, M -- Crowhurst, S -- McCave, I N -- Hodell, D -- Piotrowski, A M -- New York, N.Y. -- Science. 2012 Aug 10;337(6095):704-9. doi: 10.1126/science.1221294.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Godwin Laboratory for Palaeoclimate Research, Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK. he101@cam.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22879512" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2014-06-14
    Description: Sediments cored along the southwestern Iberian margin during Integrated Ocean Drilling Program Expedition 339 provide constraints on Mediterranean Outflow Water (MOW) circulation patterns from the Pliocene epoch to the present day. After the Strait of Gibraltar opened (5.33 million years ago), a limited volume of MOW entered the Atlantic. Depositional hiatuses indicate erosion by bottom currents related to higher volumes of MOW circulating into the North Atlantic, beginning in the late Pliocene. The hiatuses coincide with regional tectonic events and changes in global thermohaline circulation (THC). This suggests that MOW influenced Atlantic Meridional Overturning Circulation (AMOC), THC, and climatic shifts by contributing a component of warm, saline water to northern latitudes while in turn being influenced by plate tectonics.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hernandez-Molina, F Javier -- Stow, Dorrik A V -- Alvarez-Zarikian, Carlos A -- Acton, Gary -- Bahr, Andre -- Balestra, Barbara -- Ducassou, Emmanuelle -- Flood, Roger -- Flores, Jose-Abel -- Furota, Satoshi -- Grunert, Patrick -- Hodell, David -- Jimenez-Espejo, Francisco -- Kim, Jin Kyoung -- Krissek, Lawrence -- Kuroda, Junichiro -- Li, Baohua -- Llave, Estefania -- Lofi, Johanna -- Lourens, Lucas -- Miller, Madeline -- Nanayama, Futoshi -- Nishida, Naohisa -- Richter, Carl -- Roque, Cristina -- Pereira, Helder -- Sanchez Goni, Maria Fernanda -- Sierro, Francisco J -- Singh, Arun Deo -- Sloss, Craig -- Takashimizu, Yasuhiro -- Tzanova, Alexandrina -- Voelker, Antje -- Williams, Trevor -- Xuan, Chuang -- New York, N.Y. -- Science. 2014 Jun 13;344(6189):1244-50. doi: 10.1126/science.1251306.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Earth Sciences, Royal Holloway, University of London, Egham, Surrey TW20 0EX, UK. javier.hernandez-molina@rhul.ac.uk. ; Institute of Petroleum Engineering, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK. ; International Ocean Discovery Program, Department of Oceanography, Texas A&M University, College Station, TX 77845, USA. ; Department of Geography and Geology, Sam Houston State University, Huntsville, TX 77341, USA. ; Institute of Geosciences, University of Frankfurt, 60438 Frankfurt, Germany. ; Institute of Marine Sciences, University of California, Santa Cruz, CA 95064, USA. ; EPOC, Universite de Bordeaux, 33615 Pessac Cedex, France. ; School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794, USA. ; Departamento de Geologia, Universidad de Salamanca, 3008 Salamanca, Spain. ; Department of Natural History Sciences, Hokkaido University, N10W8, Kita-ku, Sapporo 060-0810, Japan. ; Institute for Earth Sciences, University of Graz, A-8010 Graz, Austria. ; Godwin Laboratory for Palaeoclimate Research, University of Cambridge, Cambridge CB2 3EQ, UK. ; Department of Biogeochemistry, JAMSTEC, 237-0061 Yokosuka, Japan. ; Korea Institute of Ocean Science & Technology, Ansan 426-744, Korea. ; School of Earth Sciences, Ohio State University, Columbus, OH 43210, USA. ; Institute for Frontier Research on Earth Evolution (IFREE), JAMSTEC, 2-15 Natsushima-Cho, Yokosuka-city, Kanagawa 237-0061, Japan. ; Department of Micropalaeontology, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, P.R. China. ; Instituto Geologico y Minero de Espana, Rios Rosas 23, 28003 Madrid, Spain. ; Geosciences Montpellier, Universite Montpellier II, 34090 Montpellier, France, and Department of Geology, University of Leicester, Leicester LE1 7RH, UK. ; Institute of Earth Sciences, Utrecht University, 3584 CD Utrecht, Netherlands. ; Department of Mechanical Engineering, California Institute of Technology, Pasadena, CA 91125, USA. ; Institute of Geology and Geoinformation, Geological Survey of Japan (AIST), Ibaraki 305-8567, Japan. ; School of Geosciences, University of Louisiana, Lafayette, LA 70504, USA. ; Divisao de Geologia e Georecursos Marinhos, IPMA, 1749-077 Lisboa, Portugal. ; Grupo de Biologia e Geologia, Escola Secundaria de Loule, 8100-740 Loule, Portugal. ; Ecole Pratique des Hautes Etudes, EPOC, Universite de Bordeaux, 33615 Pessac, France. ; Department of Geology, Banaras Hindu University, Varanasi 221005, India. ; School of Earth, Environmental and Biological Sciences, Queensland University of Technology, Brisbane, Queensland 4001, Australia. ; Department of Geology, Faculty of Education, Niigata University, Niigata 950-2181, Japan. ; Department of Geological Sciences, Brown University, Providence, RI 02912, USA. ; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA. ; Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, Waterfront Campus, Southampton SO14 3ZH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24926012" target="_blank"〉PubMed〈/a〉
    Keywords: Atlantic Ocean ; *Climate Change ; Mediterranean Sea ; Paleontology ; *Seawater ; *Water Movements
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Macmillan Magazines Ltd.
    Nature 394 (1998), S. 464-468 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] More than 20 years ago, on the basis of data from a Pacific sediment core, it was suggested that geomagnetic field intensity may vary with the Earth's orbital obliquity (centred on a period of ∼41 kyr) as a result of the effect of obliquity on precessional forces in the Earth's core. ...
    Type of Medium: Electronic Resource
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  • 5
    Publication Date: 2018-08-03
    Description: The demise of Lowland Classic Maya civilization during the Terminal Classic Period (~800 to 1000 CE) is a well-cited example of how past climate may have affected ancient societies. Attempts to estimate the magnitude of hydrologic change, however, have met with equivocal success because of the qualitative and indirect nature of available climate proxy data. We reconstructed the past isotopic composition ( 18 O, D, 17 O-excess, and d-excess) of water in Lake Chichancanab, Mexico, using a technique that involves isotopic analysis of the structurally bound water in sedimentary gypsum, which was deposited under drought conditions. The triple oxygen and hydrogen isotope data provide a direct measure of past changes in lake hydrology. We modeled the data and conclude that annual precipitation decreased between 41 and 54% (with intervals of up to 70% rainfall reduction during peak drought conditions) and that relative humidity declined by 2 to 7% compared to present-day conditions.
    Keywords: Geochemistry, Geophysics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
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