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Politics : Evolution -- Ignore unavailable to you. Want to Upgrade?

To: Brumar89 who wrote (62585)	11/12/2014 4:04:02 PM
From: TigerPaw	Read Replies (1) \| Respond to of 69300

Re the polar vortex, not so long ago that was called evidence of global cooling. Do you know what a polar vortex is? When the ocean gets hotter great storms develop. In the Atlantic they are called hurricanes while in the Pacific they are called typhoons. The storms in the Northern Hemisphere tend to start near the equator and move North (as they draw the heat out of the area they are in leaving more heat to the north of them) and west (because of the direction they rotate ). Usually they run into some piece of land and break up (causing much misery and damage). Sometimes they go North faster than they go West. This is because the ocean is even warmer than normal and so the storm moves from hot spots by the equator, sucks up that heat and moves to the next warmest spot which is to the North. The warmer the ocean, the faster it goes North instead of West (since there is an upper limit to the rotation speed). The Pacific is larger, so more often in the Pacific a typhoon will form near South America and move North and West but reach Alaska before it travels far enough West to break up over some continent. Now the storm blows into the arctic with little to slow it down and that blows a bunch of the arctic cold air South (everything is south of the arctic) across the continents. This can happen with a hurricane in the Atlantic shooting between Greenland and Canada, but the path is narrower so you usually get landfall somewhere.