大雪和结冰
大雪和结冰
大雪和结冰
Product Examples
Acquired: Pre-disaster: 12/11/2010
Acquired: 22/04/2007 NigeriaSat-1 image showing shows the area of interest on April 22 around 10:30 a.m. Newfoundland time. The false-colour image shows the area around Fogo Island, where several darker spots in the ice pack indicate the positions of ice-bound vessels.
当温度下降到冰点以下,而云层中有足够的水时,就会导致下雪。如果地面温度低到足以让雪沉淀,暴风雪会迅速对居民区造成破坏。
随着雪量的增加,公路、铁路和航空交通都可能受到影响,或因路线无法通行或天气情况过于危险而完全停滞。人们可能被困于车内,除了等待天气情况的改善或救援的到来,别无他法。如果发电机发生故障,基础设施将面临风险,使脆弱的居民面临低温风险。
如果温度仍然很低,除非用物理方法清除积雪,否则脚下压实的雪会形成冰。冰—在水面上或在压实的雪中—使情况变得很危险,如果人们滑倒,可能会导致受伤。水源可能会冻结,切断居民获得清洁水或热量的途径。
如果温度迅速上升,但仍有大量的雪和冰残留,它们可能会融化并导致山洪爆发;给受影响地区带来另一种形式的灾难。
大雪除了影响居民区之外,海上的船只也面临着海冰的危害。极地地区的航运路线可能很危险,气候条件如何变化也不得而知。卫星可以帮助绘制这些路线,确定船只的风险,并定位被困在冰中的船只。
Korea east coastal area - Snow Hazard - Pre- and Post- Disaster
Acquired: Pre-disaster: 12/11/2010
Post-disaster: 12/02/2011
Source: ALOS
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NigeriaSat-1, 22/04/2007
Acquired: 22/04/2007 NigeriaSat-1 image showing shows the area of interest on April 22 around 10:30 a.m. Newfoundland time. The false-colour image shows the area around Fogo Island, where several darker spots in the ice pack indicate the positions of ice-bound vessels.
Source: NigeriaSat-1, resolution
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