ナショナルジオグラフィックさんのインスタグラム写真 - (ナショナルジオグラフィックInstagram)「Photo by @estherhorvath Thomas Krumpen from the Alfred Wegener Institute has just arrived at Station Nord in Greenland, and Danish soldier Magnus Lindstrøm checks his papers. Mingus, the station dog, sleeps nearby. Krumpen leads the IceBird scientific expedition, which is air based and studies the sea ice thickness in the Arctic Ocean and its changes during the summer. The ice is very difficult to evaluate fully by satellite since it's melting. Krumpen is able to fill in this gap via aerial observation and provide more exact information. Since 2001 the Arctic Ocean's sea ice thickness has decreased by 30 percent during the summer months. Please follow more science stories on @estherhorvath and @awiexpedition.」7月6日 19時39分