The velocity in Pacific circumfluence becoming slower is caused by sea ice decrease around the South Pole continent and sea ices in Drake Passage play more important role than others.

南极半岛海冰减少是太平洋环流速度减慢的原因，德雷克海峡的海冰起重要作用。

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They say that braving the Drake Passage is the price you pay to see the Antarctic.

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Expeditions depart from either Puerto Williams in Chile or Ushuaia in Argentina, and include a tough three- to four-day crossing of the notorious Drake Passage.

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Bigger ships also tend to pitch and roll less in heavy seas, and they can cross the Drake Passage - which separates South America from Antarctica and can sometimes be very rough - much more quickly.

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