A global view on the wind sea and swell climate and variability from ERA-40

  • Semedo A
  • SušElj K
  • Rutgersson A
 et al. 
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Abstract

Abstract In this paper a detailed global climatology of wind-sea and swell parameters, based on the 45-yr European Centre for Medium-Range Weather Forecasts Re-Analysis (ERA-40) wave reanalysis is presented. The spatial pattern of the swell dominance of the earths oceans, in terms of the wave field energy balance and wave field characteristics, is also investigated. Statistical analysis shows that the global ocean is strongly dominated by swell waves. The interannual variability of the wind-sea and swell significant wave heights, and how they are related to the resultant significant wave height, is analyzed over the Pacific, Atlantic, and Indian Oceans. The leading modes of variability of wind sea and swell demonstrate noticeable differences, particularly in the Pacific and Atlantic Oceans. During the Northern Hemisphere winter, a strong northsouth swell propagation pattern is observed in the Atlantic Ocean. Statistically significant secular increases in the wind-sea and swell significant wave heights a...

Author-supplied keywords

  • Atlantic Ocean
  • Climatology
  • Northern hemisphere
  • Pacific Ocean
  • Wind waves

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Authors

  • Alvaro Semedo

  • Kay SušElj

  • Anna Rutgersson

  • Andreas Sterl

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