albedo
noun [ C or U ] physics specialized uk/ælˈbiː.dəʊ/ us/ælˈbiː.doʊ/
（尤指星体）反照率
the amount of the light hitting a surface that it reflects back, especially the surface of a planet or other body in space
Open water is one of the substances with the lowest albedo that we have on Earth. 开阔的水面是地球上反照率最低的物质之一。
Scientists detected what could be a 2.5 percent decrease in Earth's albedo over the past five years. 科学家们发现在过去五年中地球的反照率可能下降了 2.5%。
the albedo effect environment specialized反照率效应
the effect produced by the light and heat of the sun being reflected back from surfaces on Earth into the atmosphere
The albedo effect - the reflection of 80% of the sun's heat by the snow and ice - keeps temperatures in the region cool. 反照率效应，即冰雪反射80%的太阳热量，使该地区的温度保持凉爽。
As the ice shelves melt, more trees grow, which might actually make things worse by reducing the albedo effect. 随着冰架融化，更多树木生长，这可能会降低反照率效应，使情况变得更糟。
Thicker clouds add to the albedo effect by sending more of the sun's heat away from the surface of the earth.
The larger a bright surface is, the greater the albedo effect.
The albedo effect impacts our climate in significant ways.
- More examples
- Enceladus has an albedo greater than 90 percent, whereas the Earth and its moon have albedos of 38 percent and 12 percent, respectively.
- The object discovered by astronomers is believed to have a diameter of roughly 550 miles, based on assumptions of its surface reflectivity, or albedo.
- Sagebrush has a much lower albedo than wildflowers - that is, it reflects less sunlight back into space, causing even more warming.
- As the meadows vanish, a beneficial feedback loop - in which their high albedo helps to cool the world - is replaced by a harmful one.
- It is not entirely clear why the Arctic is warming much more quickly than other areas. One factor is probably albedo, or the heat-reflecting value of ice.