1·One way we keep track of the radiation budget is by looking at the albedo of the different surfaces on the planet.
我们记录辐射收支的一种方法是观察地球上不同表面的反照率。
2·A surface's albedo is the percentage of incoming solar energy, sunlight, that's reflected off that surface back into space.
一个表面的反照率是入射的太阳能、阳光从这个表面反射回太空的百分比。
3·Sea ice retreat and snow melt reduce Earth's albedo, which can lead to increased warmth and further melting.
海冰的消退以及冰雪的融化降低了地球的反照率，这将导致温度继续增高冰雪继续消融。
4·The bigger the asteroid, the greater the potential cataclysm. The reflectivity of the surface — what astronomers call albedo — tells how easily it can be detected.
小行星的体积越大，潜在灾难的规模就越大。行星的表面反射率——天文学家称为反照率——决定了它有多容易被探测到。
5·Melting of snow and ice affects albedo in two ways.
冰雪融化从两个方面影响反照率。