Details for Comparison of measured and calculated aerosol optical properties at mace head

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Name:Comparison of measured and calculated aerosol optical properties at mace head
Description:O'Reilly S.; Kleefeld C.; Jennings S.G.; Aalto P.; Becker E.; O'Dowd C.D., Comparison of measured and calculated aerosol optical properties at mace head, Journal of Aerosol Science, Volume 31, Supplement 1, September 2000 , pp. 274-275(2)

Abstract


There are large uncertainties associated with the estimation of the direct radiative forcing of the earth's climate by tropospheric aerosol particles (IPCC, 1996). The radiative effects of the tropospheric aerosol depend on the chemical, physical and optical properties of the aerosol. Because of their short atmospheric residence times, the distribution of tropospheric aerosols about the globe varies significantly, both spatially and temporally. Therefore, investigation of radiative forcing due to these aerosols requires analysis on a regional scale and the characterisation of the properties of the local aerosol.

Uncertainties associated with the calculation of direct radiative forcing by tropospheric aerosols can be identified and quantified using closure studies (Quinn et al., 1996). In a closure study a measured aerosol property is compared with values calculated from a model using other independently measured properties. Closure is achieved if there is agreement between the measured and calculated values within an accepted level of uncertainty. Such agreement indicates that the model may be a suitable representation of the observed system.

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