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Sökning: WFRF:(Souilmi Yassine)

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1.
  • Cooper, Alan, et al. (författare)
  • A global environmental crisis 42,000 years ago
  • 2021
  • Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 371:6531, s. 811-818
  • Tidskriftsartikel (refereegranskat)abstract
    • Geological archives record multiple reversals of Earth’s magnetic poles, but the global impacts of these events, if any, remain unclear. Uncertain radiocarbon calibration has limited investigation of the potential effects of the last major magnetic inversion, known as the Laschamps Excursion [41 to 42 thousand years ago (ka)]. We use ancient New Zealand kauri trees (Agathis australis) to develop a detailed record of atmospheric radiocarbon levels across the Laschamps Excursion. We precisely characterize the geomagnetic reversal and perform global chemistry-climate modeling and detailed radiocarbon dating of paleoenvironmental records to investigate impacts. We find that geomagnetic field minima ~42 ka, in combination with Grand Solar Minima, caused substantial changes in atmospheric ozone concentration and circulation, driving synchronous global climate shifts that caused major environmental changes, extinction events, and transformations in the archaeological record.
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2.
  • Cooper, Alan, et al. (författare)
  • Response to comment on “A global environmental crisis 42,000 years ago”
  • 2021
  • Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 374:6570
  • Tidskriftsartikel (refereegranskat)abstract
    • Our paper about the impacts of the Laschamps Geomagnetic Excursion 42,000 years ago has provoked considerable scientific and public interest, particularly in the so-called Adams Event associated with the initial transition of the magnetic poles. Although we welcome the opportunity to discuss our new ideas, Hawks’ assertions of misrepresentation are especially disappointing given his limited examination of the material.
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3.
  • Souilmi, Yassine, et al. (författare)
  • Highlights of the first ISCB student council symposium in Africa 2015
  • 2015
  • Ingår i: F1000 Research. - : F1000 Research Ltd. - 2046-1402. ; 4:ISCB Comm J
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • This is a summary of the activities and scientific content of the first International Society for Computational Biology Student Council symposium in Africa. This meeting organized by the students for the students took place 8th of March 2015 in Dar Es Salaam, Tanzania.
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  • Resultat 1-3 av 3

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