• Variations in long term wind speed during different decades in Arabian Sea and Bay of Bengal

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    • Keywords


      Extreme value; NECP/NCAR data; north Indian Ocean; Weibull distribution; Gumbel distribution.

    • Abstract


      A study has been carried out by comparing the extreme wind speeds estimated based on NCEP/NCAR reanalysis data for 100 years return period using Fischer Tippet-1 (commonly known as Gumbel)and Weibull distributions for three locations (off Goa,Visakhapatnam and Machilipatnam)in the north Indian Ocean.The wind dataset for Goa is compared with that from ERA-40 data.For higher wind speeds ($12-20 m s^{−1}$ ),NCEP wind speed has higher percentage of occurrence than that of ERA-40.Analysis has shown slight upward trend in the annual maximum wind for location off Machilipatnam with an increase of $1.2cms^{−1}$ per year and a decreasing trend of $−1.3cms^{−1}$ per year in the case of Goa.The Weibull distribution with shape parameter 2 fits the annual maximum wind data better than FT-1 distribution.

    • Author Affiliations


      V Sanil Kumar1 C Sajiv Philip1

      1. Ocean Engineering, National Institute of Oceanography, Goa 403 004, India.
    • Dates

  • Journal of Earth System Science | News

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      Posted on July 25, 2019

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