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Modern-like deep water circulation in Indian Ocean caused by Central American Seaway closure

Author

Listed:
  • Priyesh Prabhat

    (National Centre for Polar and Ocean Research, Ministry of Earth Science
    Goa University)

  • Waliur Rahaman

    (National Centre for Polar and Ocean Research, Ministry of Earth Science)

  • Nambiyathodi Lathika

    (National Centre for Polar and Ocean Research, Ministry of Earth Science)

  • Mohd Tarique

    (National Centre for Polar and Ocean Research, Ministry of Earth Science)

  • Ravi Mishra

    (National Centre for Polar and Ocean Research, Ministry of Earth Science)

  • Meloth Thamban

    (National Centre for Polar and Ocean Research, Ministry of Earth Science)

Abstract

Global overturning circulation underwent significant changes in the late Miocene, driven by tectonic forcing, and impacted the global climate. Prevailing hypotheses related to the late Miocene deep water circulation (DWC) changes driven by the closure of the Central American Seaways (CAS) and its widespread impact remains untested due to the paucity of suitable records away from the CAS region. Here, we test the hypothesis of the large-scale circulation changes by providing a high-resolution record of DWC since the late Miocene (11.3 to ~2 Ma) from the north-western Indian Ocean. Our investigation reveals a progressive shift from Pacific-dominated DWC before ~9.0 Ma to the onset of a modern-like DWC system in the Indian Ocean comprising of Antarctic bottom water and northern component water during the Miocene-Pliocene transition (~6 Ma) caused by progressive shoaling of the CAS and suggests its widespread impact.

Suggested Citation

  • Priyesh Prabhat & Waliur Rahaman & Nambiyathodi Lathika & Mohd Tarique & Ravi Mishra & Meloth Thamban, 2022. "Modern-like deep water circulation in Indian Ocean caused by Central American Seaway closure," Nature Communications, Nature, vol. 13(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-35145-0
    DOI: 10.1038/s41467-022-35145-0
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    References listed on IDEAS

    as
    1. Valeriia Kirillova & Anne H. Osborne & Tjördis Störling & Martin Frank, 2019. "Miocene restriction of the Pacific-North Atlantic throughflow strengthened Atlantic overturning circulation," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    2. Peter U. Clark & Nicklas G. Pisias & Thomas F. Stocker & Andrew J. Weaver, 2002. "The role of the thermohaline circulation in abrupt climate change," Nature, Nature, vol. 415(6874), pages 863-869, February.
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