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sci.geo.meteorology (Meteorology) (sci.geo.meteorology) For the discussion of meteorology and related topics. |
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How The Arctic ICE MELTED.
http://ecosyn.us/Temp_4/Arctic_Ice_Melt.html Some sample news stories which describe various aspects of the problem followed by visual tutorial of the heat dynamics doing the damage. Satellite images taken in August a year apart show unusually low concentrations of ice (yellow and green areas). British Isles outline indicates scale. Photo: ESA STORY LINKS: * Unprecedented melting of Arctic September 23, 2006 * Arctic ocean warms as global oceans cool -- September 26, 2006 * Arctic Ice Melt Leaves Openings Larger Than British Isles -- September 22, 2006 * Arctic ice melt alarms climate researchers -- September 14, 2006 * European Scientists Stunned by Arctic Ice Melt -- September 20, 2006 Arctic Sea Ice News 2006 (for more detailed descriptions). Figure 1: Sea ice extent for September 18, 2006 Graphic showing current sea ice compared to Sept average Current sea ice conditions: September 18, 2006 As compared to the last report, the polynya in the Beaufort Sea has opened (Figure 1). Some areas of the ocean show evidence of new ice formation as autumn cooling begins to take hold. However, at the same time, some areas south of the polynya that were formerly ice covered have continued to melt out. Total Arctic sea ice extent has declined slightly as compared to the last report, but we are probably close to the turning point in the season. White indicates areas where sea ice is present. Areas in blue are open ocean, while gray indicates land masses. The pink line shows the average ice extent for September, the end of the summer melt season. The September average is calculated from 1979 through 2000. http://ecosyn.us/Temp_4/Arctic_Ice_Melt.html HERE IS WHAT HAPPENED: Told in four graphic intensive pages, 120 days of satellite images capture the events of the Northern Pacific Ocean and Alaska, as tropical clouds are swirled into the Arctic. Click picture to access page. June 8-9th, 2006, one hour intervals. Thumbnails reduced size access full sized single images. Thumbnail page 582 kbytes, available data pictures total 5.3 megabyes. Click picture to access page. Two hurricanes active near equator. August 24-26th two-hourly intervals. Thumbnail page 236 kbytes, available data pictures total 4.7 megabyes. Click picture to access page. May 29, 2006 to September 25, 2006, 24-hour intervals. Approximately zero-hour UTC, Zulu Time. Images are sliced horizontally discarding lower 2/3rds. Thumbnails reduced 50%. See below samples for image manipulation details. Thumbnail page 1.7 megabytes, available data pictures total 8.7 megabyes. Click picture to access page. May 29, 2006 to September 25, 2006, 24-hour intervals. Approximately zero-hour UTC, Zulu Time. Images are sliced horizontally discarding lower 2/3rds. Then cropped to remove left and right. Remaining image is not reduced from original scale. Available data pictures total 4.2 megabyes. This is a typical image taken every half hour day and night. This infrared enhancement is named rainbow color. The data files do not have the latitude and longitude lines on them but it helps here to show you the area of coverage from this satellite viewpoint. The area of concern is top center. Alaska and above 50 degrees latitude is the area of interest. Here a large cloud mass containing latent heat is found south of Alaska. This is a remnant of Typhoon Yagi and still contains some counter-clockwise spin shoving warmer air north into and over Alaska on this date. Below is a slice from the same image. Below that is the reduced size and the non-reduced but cropped left and right sides version of the same data to focus only on Alaska and the Far Northern latitudes. |
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