Radiative closure • Use in-situ measured (and inferred) aerosol optical properties and radiative transfer code to model fluxes • Compare with broad band radiometer measurements on aircraft • To date: • Identification of suitable flights (B362 and B374) • Assessment of accuracy of BBRs and need for pitch/roll corrections • Preliminary calculations with Edwards and Slingo (1996)
B374 – Radiation flight with CMET May 14, 2008
Aerosol hygroscopicity during B374 Wet nephelometer provides f(RH), ϐ/ ϐ0 Need D/D0 for full mie scattering code (Tang 1997 growth not appropriate)
Further work • Still to do…. • Radiative closure with BBRs for aerosol runs (wet aerosol – properties now available from use of wet neph data) • Analysis of orbits/SWS/SHIMS data (to be done by Debbie O’Sullivan, Met Office) • More radiation flights?