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Author Manktelow, P. T. ♦ Carslaw, K. S. ♦ Mann, G. W. ♦ Spracklen, D. V.
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Regional Sulfur Emission ♦ Physic Variable Ccn Formation Potential ♦ Atmospheric Chemistry ♦ Sulfate Mass ♦ Unit Sulfur Emission ♦ Geographical Dis-tribution ♦ Sulfur Emission ♦ Regional Difference ♦ European Emission ♦ Long Range Transport ♦ Climate Depends ♦ Asian Emission ♦ Eu-ropean Pollution ♦ Free Troposphere ♦ Efficient Particle Pro-duction ♦ New Particle ♦ Associated Direct Radiative Forc-ing Vary ♦ Global Model ♦ Different Climate Forcing Potential ♦ Particle Concentration ♦ Particle Production ♦ Aerosol Number ♦ Aerosol Micro-physics ♦ Total Number ♦ Previous Model Study ♦ Aerosol Number Potential ♦ Nm Diameter Cloud Condensation ♦ Sul-fate Burden Potential ♦ Sulfate Aerosol ♦ Sulfate Burden Potential ♦ Aerosol Particle ♦ Cloud Drop Number ♦ Different Regional Variation ♦ Nm Diameter Ccn
Abstract Abstract. Aerosols are short lived so their geographical dis-tribution and impact on climate depends on where they are emitted. Previous model studies have shown that the mass of sulfate aerosol produced per unit sulfur emission (the sul-fate burden potential) and the associated direct radiative forc-ing vary regionally because of differences in meteorology and photochemistry. Using a global model of aerosol micro-physics, we show that the total number of aerosol particles produced per unit sulfur emission (the aerosol number po-tential) has a different regional variation to that of sulfate mass. The aerosol number potential of N. American and Asian emissions is calculated to be a factor of 3 to 4 times greater than that of European emissions, even though Eu-rope has a higher sulfate burden potential. Pollution from N. America and Asia tends to reach higher altitudes than Eu-ropean pollution so forms more new particles through nucle-ation. Regional differences in particle production and growth mean that sulfur emissions from N. America and E. Asia pro-duce 50 nm diameter cloud condensation nuclei up to 70% more efficiently than Europe. For 80 nm diameter CCN, N. America and Europe produce CCN 2.5 times more effi-ciently than E. Asia. The impact of regional sulfur emissions on particle concentrations is also much more widely spread than the impact on sulfate mass, due to efficient particle pro-duction in the free troposphere during long range transport. These results imply that regional sulfur emissions will have different climate forcing potentials through changes in cloud drop number.
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Date 2009-01-01