CONCLUSIONS

1

• CONCLUSIONS
• Near-real time comparisons between GERB data and
  the Met Office NWP model since 2003
• Exploitation of the synergy between GERB, SEVIRI
  and an NWP model has contributed to (i) the
  monitoring of the satellite instruments, (ii)
  model evaluation, and (iii) improved
  understanding of radiative processes
• Clear-sky OLR simulated by the model agrees to
  within about 5-10 Wm-2 of the GERB fluxes
• The longwave radiative signature of mineral dust
  aerosol is present in the GERB/SEVIRI data
• Monthly mean model OLR is underestimated by
  around 50 Wm-2 at 1200 UTC in summer months over
  west Sahara compared to GERB/Meteosat
• Model deficiencies including simulation of
  tropical convection and cirrus outflow,
  low-altitude oceanic cloud and Sahara surface
  albedo
• The near-real time comparisons have contributed
  to the process of model improvement through
  updated parametrizations