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SUMMARY:Assessing the longwave radiative effect of Saharan dust using - Dr
  Helen Brindley\, Space and Atmospheric Physics Group\, Imperial College\,
  London.
DTSTART:20090601T131500Z
DTEND:20090601T141500Z
UID:TALK16195@talks.cam.ac.uk
CONTACT:Dr Francis Pope
DESCRIPTION:'The Geostationary Earth Radiation Budget (GERB) instruments f
 lying\non the Meteosat Second Generation (MSG) series of satellites provid
 e\na unique tool with which to monitor the diurnally resolved evolution\no
 f the top of atmosphere broad-band radiation fields.  In addition\,\ncoinc
 ident narrow band observations from the Spinning Enhanced\nVisible and Inf
 raRed Imager (SEVIRI) instruments\, also flying on the\nMSG platforms\, ca
 n be used to provide information about the key\natmospheric parameters tha
 t influence these broad-band radiative\nfluxes.  One such parameter is Sah
 aran dust\, with snapshot aircraft\nobservations taken under heavy dust lo
 adings indicating a radiative\nperturbation that can exceed 100 W m-2.\nIn
  this talk I will provide a brief introduction to the satellite instrument
 s before describing a relatively simple approach that has been developed t
 o identify and quantify Saharan dust loading over North Africa and Arabia 
 using SEVIRI observations.  I will then describe how this information can 
 be used\, in conjunction with the GERB measurements\, to simultaneously di
 agnose the longwave dust direct radiative effect and provide examples of b
 oth quantities for an extended period through spring and summer 2006.\n
LOCATION:Unilever Lecture Theatre\, Department of Chemistry
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