Mathematics – Logic
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufm.a43d0130p&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #A43D-0130
Mathematics
Logic
0321 Cloud/Radiation Interaction, 0343 Planetary Atmospheres (5210, 5405, 5704), 1616 Climate Variability (1635, 3305, 3309, 4215, 4513), 3310 Clouds And Cloud Feedbacks, 3359 Radiative Processes
Scientific paper
Traditionally the earth's reflectance has been assumed to be roughly constant, but large decadal variability, not reproduced by current climate models, has been reported lately from a variety of sources. We compare here the available datasets related to earth's reflectance, in order to assess the observational constraints on the models. We find a consistent picture among all datasets of an albedo decreased during 1985-2000 between 2-3 and 6-7 W/m2, which is highly climatologically significant. The largest discrepancy among the datasets occurs during 2000-2004, when several sets reveal an increasing trend in the reflectance, while CERES observations show a steady decrease of about 2 W/m2. Additionally, analysis of the recently realeased ISCCP data for 2000-2004 are presented. These later findings show a consistency in long-term trends between earthshine reflectance measurements and the global cloud properties and climate change.
Casadio Stefano
Goode Philip. R.
Koonin Steven E.
Montanes-Rodriguez Pilar
Palle Enric
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