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Iron control of past productivity in the coastal upwelling system off the Atacama Desert, Chile

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  • معلومة اضافية
    • Contributors:
      Laboratoire Dynamique de la Lithosphère (LDL); Université Montpellier 2 - Sciences et Techniques (UM2)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS); Centro de Investigación Oceanográfica en el Pacífico Sur Oriental (COPAS); Universidad de Concepción - University of Concepcion Chile; Center for Marine Environmental Sciences Bremen (MARUM); Universität Bremen; Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI); Helmholtz-Gemeinschaft = Helmholtz Association; Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE); Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA); Océan et Interfaces (OCEANIS); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)); Géochrononologie Traceurs Archéométrie (GEOTRAC)
    • بيانات النشر:
      HAL CCSD
      American Geophysical Union
    • الموضوع:
      2004
    • Collection:
      Institut national des sciences de l'Univers: HAL-INSU
    • نبذة مختصرة :
      International audience ; [1] Biogenic opal and organic carbon vertical rain rates in sediment cores reveal a strong cyclicity in the productivity of the upwelling system off presently arid northern Chile during the last 100,000 years. Changes in productivity are found to be in phase with the precessional cycle ($20,000 years) and with inputs of iron from the continent. During austral summer insolation maxima, increased precipitation and river runoff in the region appear to have brought high inputs of iron, mainly from the Andes, to the coastal ocean enhancing primary productivity there. We interpret our results as providing evidence for iron control of past productivity in this upwelling system and for a tight link between productivity and orbital forcing at midlatitudes.
    • Relation:
      hal-02470593; https://hal.science/hal-02470593; https://hal.science/hal-02470593/document; https://hal.science/hal-02470593/file/2004PA001006.pdf
    • الرقم المعرف:
      10.1029/2004PA001006
    • الدخول الالكتروني :
      https://hal.science/hal-02470593
      https://hal.science/hal-02470593/document
      https://hal.science/hal-02470593/file/2004PA001006.pdf
      https://doi.org/10.1029/2004PA001006
    • Rights:
      info:eu-repo/semantics/OpenAccess
    • الرقم المعرف:
      edsbas.66406002