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l'observation confirme l'existence des"cellules convectrices de hadley" près de l'équateur, mais seulement jusqu'à environ 20° de latitude : là, l'écoulement de hadley se réfléchit.
observations confirm that convective "hadley cells" actually exist near the equator, but they only extend to a latitudes of about 20°. that is where the hadley flow descends again.