• A revisit to the regulation of oxygen minimum zone in the Bay of Bengal

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    • Keywords


      Oxygen minimum zone; eddies; stratification; Bay of Bengal

    • Abstract


      Occurrence of intense oxygen minimum zone (OMZ) is known in the Bay of Bengal (BoB), but it has been recently reported to have become more acute and is at its tipping point. Here, we show that the intensification of OMZ to acute condition is a random and short-term rather than perennial phenomenon based on re-evaluation of old and recent information in the BoB. Short-term modifications in dissolved oxygen (DO) in the OMZ are caused by balance among physical forcings: salinity stratification, occurrence of cyclonic (CE), and anticyclonic eddies (ACE). Our analysis reveals that ‘acute OMZ’ is only a transient phenomenon in the Bay since the dynamic periodic physical forcings, particularly ACEs, do not allow it to become a dead zone.

    • Author Affiliations



      1. CSIR-National Institute of Oceanography, Visakhapatnam 530 017, India.
      2. Present address: 9-18-8/12, Prasanthinagar, Visakhapatnam 530 017, India.
    • Dates

    • Supplementary Material

  • Journal of Earth System Science | News

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      Posted on July 25, 2019

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