Wielicki Bruce A, Wong Takmeng, Loeb Norman, Minnis Patrick, Priestley Kory, Kandel Robert
NASA Langley Research Center, 21 Langley Boulevard, Hampton, VA 23681, USA.
Science. 2005 May 6;308(5723):825. doi: 10.1126/science.1106484.
NASA global satellite data provide observations of Earth's albedo, i.e., the fraction of incident solar radiation that is reflected back to space. The satellite data show that the last four years are within natural variability and fail to confirm the 6% relative increase in albedo inferred from observations of earthshine from the moon. Longer global satellite records will be required to discern climate trends in Earth's albedo.
美国国家航空航天局（NASA）的全球卫星数据提供了对地球反照率的观测，即入射太阳辐射中被反射回太空的部分。卫星数据显示，过去四年的数据处于自然变化范围内，无法证实从月球地照观测推断出的反照率相对增加6%的情况。需要更长时间的全球卫星记录来识别地球反照率的气候趋势。
