NASAのインスタグラム(nasagoddard) - 8月10日 05時01分

Summer Storm Spins Over Arctic - An unusually strong storm formed off the coast of Alaska on August 5 and tracked into the center of the Arctic Ocean, where it slowly dissipated over the next several days.The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured this natural-color mosaic image on August 6, 2012. The center of the storm at that date was located in the middle of the Arctic Ocean. The storm had an unusually low central pressure area. Paul A. Newman, Chief Scientist for Atmospheric Sciences at NASA Goddard estimates that there have only been about eight storms of similar strength during the month of August in the last 34 years of satellite records. “It’s an uncommon event, especially because it’s occurring in the summer. Polar lows are more usual in the winter,” Newman said. Arctic storms such as this one can have a large impact on the sea ice, causing it to melt rapidly through many mechanisms, such as tearing off large swaths of ice and pushing them to warmer sites, churning the ice and making it slushier, or lifting warmer waters from the depths of the Arctic Ocean. Aqua passes over the poles many times a day, and the MODIS Rapid Response System stitches together images from throughout each day to generate a daily mosaic view of the Arctic. This technique creates the diagonal lines that give the image its "pie slice" appearance. In the image, the bright white ice sheet of Greenland is seen in the lower left. #nasa #Arctic #weather #polar #ice #snow

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