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ESA
     
Introduction
 
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Appraising the Direct Impacts of Aerosol on Climate (ADIENT)

Roy Grainger(1), James Allan(2), Helen Brindley(3), Ken Carslaw(4), Hugh Coe(2), Maria Frontoso(4), Alexandros Georgiadis(3), Eleanor Highwood(5), Haiyan Huang(1), Brian Kerridge(6), Will Morgan(2), Megan Northway(5), Gordon McFiggans(2), Gavin McMeeking(2), Caroline Poulsen(6), Richard Siddans(6), Andy Smith(1) and Gareth Thomas(1)

(1) University of Oxford, Clarendon Laboratory, Oxford, OX1 3PU, United Kingdom
(2) University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
(3) Imperial College, Prince Consort Road, London SW7 2BZ, United Kingdom
(4) University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United Kingdom
(5) University of Reading, White Knights Road, Reading RG6 6BB, United Kingdom
(6) Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX  , United Kingdom

Abstract

Aerosols are one of the greatest sources of uncertainty in interpretation of climate change of the past century and in the projection of future climate change (IPCC, 2001; Ramanathan et al., 2001). ADIENT is a three year project whose aim is to estimate, with a reduced uncertainty compared to earlier studies, the direct effect of atmospheric aerosol on the Earth’s radiation balance. The project will deliver: • new FAAM measurements of the physical, chemical and optical properties of aerosol over the UK and Europe, • a comprehensive description of the spatio-temporal evolution of anthropogenic aerosol, in particular the single scatter albedo, • an assessment of the radiative impact of anthropogenic aerosol, • a comprehensive description of the physical properties of key aerosol types, • an assessment of the aerosol radiative forcing split into the natural and anthropogenic contribution both regionally and globally.

This is being achieved through a combination of aircraft measurement, modelling and satellite measurement studies. Here early results from the ADIENT consortium are presented.