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uk.sci.weather (UK Weather) (uk.sci.weather) For the discussion of daily weather events, chiefly affecting the UK and adjacent parts of Europe, both past and predicted. The discussion is open to all, but contributions on a practical scientific level are encouraged. |
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I noticed a similarity in the schema of the hurricane in this link. The
page is about cyclones generally and I must say the author has in line with the most scholarly understandings mixed symptoms with causes but the ideas are there. The sketch is found above this description: "Hurricanes intensify when condensation of water vapor in rising air releases heat energy into storm, setting off a chain reaction. The heat makes the surrounding air more buoyant, causing it to rise further. To compensate for the rising air, surrounding air sinks. The sinking air is compressed by the weight of the air above it, and it warms. The pressure rises at the top of the layer of warmed air, pushing air outward. As the air spreads outward, the total air pressure at the surface drops. The more the pressure drops, the more the winds intensify, drawing more heat and moisture from the ocean surface. (Graphic by Robert Simmon, NASA GSFC.)" http://earthobservatory.nasa.gov/Library/Hurricanes/ And the parallel it reminded me of is the simple model of the Hadley cells et al centred on the equator. Speaking of which the equator is a fence on which the theory falls: "The storm takes the distinctive, spiraling hurricane shape because of the Coriolis Force, generated by the rotation of the Earth. This is the same force that causes the south-blowing African jet to bend westward over the Atlantic, spawning easterly waves. In the Northern Hemisphere, the Earth's rotation causes moving air to veer to the right. As air rushes towards the low-pressure center of the storm at the Earth's surface, it curves right. If the storm is far enough from the equator (generally at least 8 degrees of latitude), the deflection or curvature is great enough that the air starts spinning counterclockwise around the center of the storm." There is no force, per se, in the Coriolis effect. And the idea is a misnomer as chirality occurs with almost exact duplication however closely (or for that matter from however far back) you look at god's tangible creation. But it was the thrown away line: "(generally at least 8 degrees of latitude)" that had me piqued. Seasoned adherent to my warbling will know why. |