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      https://www.ias.ac.in/article/fulltext/jess/121/03/0559-0593

    • Keywords

       

      Levitus atlas; temperature climatology; salinity climatology; Indian Exclusive Economic Zone.

    • Abstract

       

      The most used temperature and salinity climatology for the world ocean, including the Indian Ocean, is the World Ocean Atlas (WOA) (Antonov et al 2006, 2010; Locarnini et al 2006, 2010) because of the vast amount of data used in its preparation. The WOA climatology does not, however, include all the available hydrographic data from the Indian Exclusive Economic Zone (EEZ), leading to the potential for improvement if the data from this region are included to prepare a new climatology. We use all the data that went into the preparation of the WOA (Antonov et al 2010; Locarnini et al 2010), but add considerable data from Indian sources, to prepare new annual, seasonal, and monthly climatologies of temperature and salinity for the Indian Ocean. The addition of data improves the climatology considerably in the Indian EEZ, the differences between the new North Indian Ocean Atlas (NIOA) and WOA being most significant in the Bay of Bengal, where the patchiness seen in WOA, an artifact of the sparsity of data, was eliminated in NIOA. The significance of the new climatology is that it presents a more stable climatological value for the temperature and salinity fields in the Indian EEZ.

    • Author Affiliations

       

      A Chatterjee1 D Shankar1 S S C Shenoi2 G V Reddy1 G S Michael1 M Ravichandran2 V V Gopalkrishna1 E P Rama Rao2 T V S Udaya Bhaskar2 V N Sanjeevan3

      1. National Institute of Oceanography (Council of Scientific and Industrial Research), Dona Paula, Goa 403 004, India.
      2. Indian National Centre for Ocean Information Services, Ocean Valley, Hyderabad 500 055, India.
      3. Centre for Marine Living Resources and Ecology, Kendriya Bhavan, Kochi 682 037, India.
    • Dates

       
  • Journal of Earth System Science | News

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