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POLYGON experiment : ウィキペディア英語版
POLYGON experiment
The POLYGON experiment was a pioneer experiment in oceanography conducted in middle of the Atlantic Ocean during the 1970s.〔Munk & Day (2008)〕〔, see Brekhovskikh ''et al.'' (1971)〕 The experiment, led by Leonid Brekhovskikh, was the first to establish the existence of so-called "mesoscale eddies", eddies at the 100-km and 100-day scale, which triggered the "mesoscale revolution".〔 The existence of mesoscale eddies were predicted by Henry Stommel in the 1960s,〔Mikhalevsky (2005)〕 but there was no way to observe them with traditional sampling methods.〔
==Setup and results==

POLYGON was led by Leonid Brekhovskikh, from the Andreev Acoustics Institute, involving six research vessels and an extensive network of current meters. The flow meters were disposed in a cross, spanning a region of 113 by 113 nautical miles dubbed the "polygon".〔〔〔Brekhovskikh ''et al.'' (1971)〕 The experiment recorded temperature and flow, replacing the meters every 25 days, while taking care that the replacements would not create gaps in the data.〔 The research vessels involved were the ''Akademik Kurchatov'', the ''Dmitri Mendeleev'', the ''Andrei Vil'kitskii'', the ''Akademik Vernadskii'', the ''Sergei Vavilov'' and the ''''Pyotr Lebedev''''.〔Kort & Samoĭlenko (1983)〕
Of the results, Brekhovskikh wrote in original breakthrough article "Even with somewhat less sophisticated gear than was desirable, the results... exceeded all expectations in terms of ... the significance of the scientific results obtained. Undoubtedly the experience... will be very useful in the preparation for the forthcoming international campaign MODE... It looks as though some largescale eddy or wave disturbances were travelling across the POLYGON site from east to west. Their scales were close to those of the planetary baroclinic Rossby waves..."〔

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