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CERES/GEO and CERES-only(ERBE) SW Diurnal Averaging Comparison



CERES/GEO and CERES-only(ERBE) SW Diurnal Averaging Comparison(1)

  • Example Peruvian maritime stratus region, morning stratus clouds that burn off in the afternoon
Image: CERES SW Diurnal Averaging Comparison(1)
  • Terra SSF product overestimates the daily SW flux
  • Aqua SSF product underestimates the daily SW flux
  • Terra CERES and 3-hourly GEO fluxes estimate is closer to the truth

CERES/GEO and CERES-only(ERBE) SW Diurnal Averaging Comparison(2)

  • Difference the time interpolated SW fluxes based on Terra (10:30 equator local crossing time) and Aqua (1:30PM) of December 2002
Image: CERES/GEO and CERES-only(ERBE) SW Diurnal Averaging Comparison(2)
  • Terra-only fluxes > Aqua-only fluxes over marine stratus regions (morning clouds)
  • Aqua-only fluxes > Terra-only fluxes over land afternoon convection regions
  • The merged GEO fluxes have removed the CERES sampling bias of the diurnal cycle

CERES/GEO and CERES-only(ERBE) SW Diurnal Averaging Comparison(3)

  • Difference of the monthly regional means of CERES/GEO and CERES-only temporal SW averaging for Terra (10:30 AM sun-synchronous) December 2002
Image: CERES/GEO and CERES-only(ERBE) SW Diurnal Averaging Comparison(3)
  • Terra-CERES-only monthly means overestimate the SW flux over maritime stratus and underestimate the afternoon convection regions
  • Regional monthly differences can be > 20 W/m2
  • Global bias is - 1.0 W/m2

CERES Data Product Information

 
  Image: NASA Logo NASA Official: Dr. Norman Loeb
Page Curator: Edward Kizer
Page Last Modified: 10/16/2017 11:04:36 EST
Site Last Modified: 11/07/2017 17:18:43 EST