|Author||Manktelow, P. T. ♦ Carslaw, K. S. ♦ Mann, G. W. ♦ Spracklen, D. V.|
|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|
|Education Level||UG and PG ♦ Career/Technical Study|
|Learning Resource Type||Article|
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