A 30-Year Record of Aerosol Properties over Land from TOMS and OMI Observations

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We propose the production of a global record of aerosol properties over land derived from 33 years of near-UV observations by five sensors. The derived products include the UV aerosol Index, aerosol extinction optical depth and aerosol absorption optical depth. The combined 33 year-record of aerosol information derived from the TOMS family of sensor (Nimbus-7, 1979-1992; Meteor-3, 1992-1994; Earth-Probe, 1996-2005) constitutes the only global data set on aerosol properties over-land before the deployment of the MODIS and MiSR sensors on the Terra platform. The 1978-2005 TOMS record of Aerosol Index and aerosol optical depth provided the first global depiction of the global aerosol load. With the launch of the OMI instrument in 2004, the near UV record continues to be extended to the present and the foreseeable future using a mature retrieval algorithm. The proposed data set will provide a useful set of observations covering a period when no other data sets over land are available. In addition to the above described products we will also generate an Aerosol Index simulator that will facilitate the comparison of transport model results to satellite observations.

Omar Torres- PI, Goddard Space Flight Center

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