Wave heights, like sea surface heigths, can be used for statistical studies. General trend studies are indeed one of the main use for altimetric wave heights. If we have a look at these over the whole oceans, we can clearly see where waves are the highest (in the Southern Ocean, where they stay rather high at all time), the most variable (in the North Atlantic, where waves can be low on summer, but high in winter), or calm areas (in the tropical zone).

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