尼泊尔与西藏边界山区周三发生严重山洪爆发,造成约160人死亡,数百人失踪(包含国际游客)。初步卫星影像与政府报告指出,这场灾难可能是由于冰川崩落引发土石流所造成。
随著全球气温上升,冰川变得越来越不稳定。专家指出,自2000年以来全球冰川已流失5%的冰量,而尼泊尔的冰川在1970年至2010年间更是缩减了近四分之一,这使得毁灭性洪水的风险大幅增加。
此次灾难起因于一块宽达2000英尺的巨大冰块自近4000英尺高处崩落,其强大的冲击力甚至引发了规模5.2的地震事件。温暖的气温、融水增加以及高山永冻土解冻,都加剧了冰川解体与灾难发生的可能性。
A severe flash flood struck the mountainous border region of Nepal and Tibet on Wednesday, leaving approximately 160 people dead and hundreds more missing, including international tourists. Initial satellite imagery and government reports suggest the disaster was likely triggered by a landslide caused by a massive glacier collapse.
As global temperatures rise, glaciers are becoming increasingly unstable. Experts note that global glaciers have lost 5 percent of their ice since 2000, with Nepal losing nearly a quarter of its glacier area between 1970 and 2010, significantly elevating the risk of catastrophic flooding.
The disaster resulted from a 2,000-foot-wide chunk of ice falling almost 4,000 feet, generating a force so massive that it registered as a magnitude 5.2 seismic event. Warmer temperatures, increased meltwater, and thawing alpine permafrost all compound to destabilize these glaciers and trigger such devastating events.