Monthly means of reflected solar flux from POLDER (ADEOS-1) and comparison with ERBE, ScaRaB and CERES
Résumé
A diurnal cycle model is applied to POLDER instantaneous albedo determinations (Nov. 1996-June 1997) in order to compute daily and monthly means of the reflected flux at the top of the atmosphere. These results are compared to the ERBE, ScaRaB and CERES records. The quantitative comparison of the tropical means shows that the POLDER reflected flux density is on average lower by about 7 Wm−2 compared to ERBE (1985-1989) and ScaRaB-1 (1994-1995) and by 2.7 Wm−2 compared to ScaRaB-2 (Nov. 1998-March 1999) and CERES/Terra (2000-). The maps of POLDER albedo reveal strong deviations in the tropical Pacific. They correspond to the beginning of the 1997-1998 ENSO event.
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