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Changes in Earth's Albedo Measured by Satellite

2005; American Association for the Advancement of Science; Volume: 308; Issue: 5723 Linguagem: Inglês

10.1126/science.1106484

1095-9203

Bruce A. Wielicki, Takmeng Wong, Norman G. Loeb, Patrick Minnis, Kory J. Priestley, Robert Kandel,

Atmospheric and Environmental Gas Dynamics

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.