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RADIATIVE TRANSFER IN SHALLOW CUMULUS CLOUD FIELDS

RADIATIVE TRANSFER IN SHALLOW CUMULUS CLOUD FIELDS. HAN VAN DOP and KEITH WILSON. BBC FIELD CAMPAIGN 2003. October 2004. MAJOR OBJECTIVES collection of observations of radiative fluxes as a function of azimuth and zenith angle (radiances) in cloudy conditions. OBSERVED PARAMETERS.

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RADIATIVE TRANSFER IN SHALLOW CUMULUS CLOUD FIELDS

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  1. RADIATIVE TRANSFER IN SHALLOW CUMULUS CLOUD FIELDS HAN VAN DOP and KEITH WILSON BBC FIELD CAMPAIGN 2003 October 2004

  2. MAJOR OBJECTIVES collection of observations of radiative fluxes as a function of azimuth and zenith angle (radiances) in cloudy conditions

  3. OBSERVED PARAMETERS Radiance, R() Upwelling Radiation (integrated /2-, 0-2D Downwelling Radiation (integrated 0-/2, 0-2D Azimuthal irradiance (IA( Actinic Flux (integrated 0-, 0-2F Global Irradiance, G Liquid water content, LWC

  4. TEST CASES • cloudless conditions • cloudy conditions

  5. FLIGHT GEOMETRIES

  6. Clear sky data, 8, 10, 21 May

  7. 10 May UVa blue sky Azimuthally Integrated radiance Flight track 324 s G D D LWC Flight altitude R(

  8. 8 May visible blue sky

  9. 8.47 8.63 8.41 Down-welling radiance, D Blue sky 8.73 8.80 8.98

  10. G 10 May 21May cud D cd D cs LWC ic Clear sky (cs) Cloud up (cu) Cloud dwn (cd) Cloud up&dwn (cud) In Cloud (ic) 21May 21May cd cs cu

  11. 10 May Cloud passings 108 s

  12. In-cloud descent

  13. upper cloud part 2577m lower cloud part 2486m

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