Comparison of International Panel on Climate Change Fourth Assessment Report climate model simulations of surface albedo with satellite products over northern latitudes

摘要: [1] The surface albedos simulated by seventeen climate models over the northern latitudes of Western Hemisphere were compared with satellite-derived albedo products provided International Satellite Cloud Climatology Project (ISCCP). Model simulations conducted in support Panel on Climate Change (IPCC) Fourth Assessment Report (AR4). Results show following: (1) Annual region averaged for all is fairly close to that ISCCP (0.351 versus 0.334). The difference between model average and well below standard deviation among models. (2) Most seasonal variations regional reasonably well. In summer, systematically overestimated relative data as much 0.05. winter, large differences detected (3) spatial correlations models, ISCCP, depend geographic location, season type. general, correlation coefficients individual highest land midsummer ocean spring. bias was smaller than surface, summer winter. (4) Unlike modeling results, satellite showed interannual a systematic decreasing trend 16 year period 1984–1999. Depending season, variation ranged from 0.036 0.074, linear regression slope −0.02 −0.05 per decade according results. are not reflected simulations. Additional efforts still required improve GCMs its mapping satellite.