Does your weather station get the wind? How station siting compromises temperature measurements via wind issues

Guest essay by Bob Fernley-Jones Well Melbourne (Oz) sure does, (and we are the butt of a few intercity jokes, a polite one being; we can have “four seasons all in one day”). The following graphic (source) of an extreme example when we had tragic bushfires in 2009 shows how wind direction, strength and duration…

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A descent into the maelstrom – 'black hole' whirlpools seen for the first time in the South Atlantic

More settled science: these whirlpools transport vast amount of water and heat vertically in the ocean, somewhat like hurricanes do for the atmosphere. It is fun to imagine “Trenberth’s missing heat” being sucked down one of these. Via Yahoo News: Satellites have shown two mysterious ‘black hole’ whirlpools in the South Atlantic ocean – ultra…

Going Around In Great Circles

Guest Post by Willis Eschenbach I’m sure many people know this, but a “great circle” is a circle that goes clear around the entire globe, and whose center is at the center of the globe. A “meridian”, on the other hand, is a great circle that passes through the poles. Lines of longitude are meridians,…