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 Simon Norfolk @simonnorfolkstudio I A glacier table: a boulder perched on a pedestal of ice. Photographed on assignment during an ascent to the Chhota Shigri Glacier, Himachal Pradesh, Indian Himalaya. The boulder protects the ice from ablation during sunny weather. Around the boulder, the ice surface ablates while the boulder remains at the original level. As the pedestal becomes higher and higher in relation to the glacier's surface, the sun shines further under the boulder from the south. Consequently the pedestal gets ablated on its southern side, and the boulder will eventually fall off the pedestal. After this, a new cycle of table growth and destruction may begin. Follow me @simonnorfolkstudio for updates, outtakes, unpublished, and archive material on this and future projects. #photojournalism #documentaryphotography #simonnorfolk #ice #climatechange」5月26日 9時06分