<P> In the arctic, icing from October to May can present a hazard for shipping while persistent fog occurs from June to December . A climatological low in the Gulf of Alaska keeps the southern coast wet and mild during the winter months . The Westerlies and associated jet stream within the Mid-Latitudes can be particularly strong, especially in the Southern Hemisphere, due to the temperature difference between the tropics and Antarctica, which records the coldest temperature readings on the planet . In the Southern hemisphere, because of the stormy and cloudy conditions associated with extratropical cyclones riding the jet stream, it is usual to refer to the Westerlies as the Roaring Forties, Furious Fifties and Shrieking Sixties according to the varying degrees of latitude . </P> <P> The ocean was first mapped by Abraham Ortelius; he called it Maris Pacifici following Ferdinand Magellan's description of it as "a pacific sea" during his circumnavigation from 1519 to 1522 . To Magellan, it seemed much more calm (pacific) than the Atlantic . </P> <P> The andesite line is the most significant regional distinction in the Pacific . A petrologic boundary, it separates the deeper, mafic igneous rock of the Central Pacific Basin from the partially submerged continental areas of felsic igneous rock on its margins . The andesite line follows the western edge of the islands off California and passes south of the Aleutian arc, along the eastern edge of the Kamchatka Peninsula, the Kuril Islands, Japan, the Mariana Islands, the Solomon Islands, and New Zealand's North Island . </P> <P> The dissimilarity continues northeastward along the western edge of the Andes Cordillera along South America to Mexico, returning then to the islands off California . Indonesia, the Philippines, Japan, New Guinea, and New Zealand lie outside the andesite line . </P>

Which part of the south pacific ocean was named after a dutch explorer