ドレーク海峡
To make a connection with the global surface temperature, an open (and sufficiently deep) Drake Passage cools the [[Southern Ocean]] and warms the high latitudes of the northern hemisphere. Indeed, the isolation of Antarctica by the Antarctic Circumpolar Current (that can flow only with an open Drake Passage) is credited by many researchers with causing the glaciation of the continent and global cooling in the [[Eocene]] epoch.