Note: Scientists at the National Snow and Ice Data Center, who calculate the sea ice minimum based on a 5-day trailing average, identified September 16 as the date when the lowest minimum extent occurred. 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The summer’s temperatures for much of U.S. (except the western U.S. coast) are cooler than normal. This, following the bitter polar vortex chill back in January. What’s going on? 1. One of many driving forces of this weather (besides El Niño, NAO, PDO, etc.) might be the jet stream’s interaction with the Arctic Ocean. 2. The Arctic is warming at twice the rate of the rest of the world, partly because the sea ice is melting, allowing the sun to warm up the ocean water. 3. But more open water means more evaporation and clouds. Will more clouds act as cooling sun umbrellas, or warming blankets in the future? NASA’s new ARISE mission onboard the flying C-130 laboratory will look for some answers this coming September. TAG: The peak of the Arctic sea ice melt usually happens in mid-September. Expect new NASA images then.", "width": 1024, "height": 576, "pixels": 589824 } } ], "sources": [], "products": [], "newer_versions": [ { "id": 4052, "url": "https://svs.gsfc.nasa.gov/4052/", "page_type": "Visualization", "title": "Arctic Daily Sea Ice Concentration from March 2012 to February 2013", "description": "This animation shows the seasonal change in the extent of the Arctic sea ice between March 1, 2012 and February 28, 2013. The annual cycle starts with the maximum extent reached on March 15, 2012. Every summer the Arctic ice cap melts down to its minimum extent before colder weather builds the ice cover back up. This new ice generated on an annual basis is called \"first-year\" ice and is thinner than the older sea ice. The perennial ice is the portion of the ice cap that spans multiple years and represents its thickest component. On September 13, 2012, the sea ice minimum covered 3.439 million square kilometers, that is down by more than 3.571 million square kilometers from the high of 7.011 million square kilometers measured in 1980. The annual maximum extent for 2013 reached on February 28 reached an extent of 15.09 million square kilometers. || ", "release_date": "2013-04-03T00:00:00-04:00", "update_date": "2024-10-09T00:03:23.212585-04:00", "main_image": { "id": 467449, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a004000/a004052/dailySeaIce_v007.2085.jpg", "filename": "dailySeaIce_v007.2085.jpg", "media_type": "Image", "alt_text": "Animation of Arctic sea ice from March 2012 to February 2013.", "width": 1920, "height": 1080, "pixels": 2073600 } } ], "older_versions": [], "alternate_versions": [] }