Publication Date:
1997-11-05
Description:
Photochemical smog, or ground-level ozone, has been the most recalcitrant of air pollution problems, but reductions in emissions of sulfur and hydrocarbons may yield unanticipated benefits in air quality. While sulfate and some organic aerosol particles scatter solar radiation back into space and can cool Earth's surface, they also change the actinic flux of ultraviolet (UV) radiation. Observations and numerical models show that UV-scattering particles in the boundary layer accelerate photochemical reactions and smog production, but UV-absorbing aerosols such as mineral dust and soot inhibit smog production. Results could have major implications for the control of air pollution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dickerson, R R -- Kondragunta, S -- Stenchikov, G -- Civerolo, K L -- Doddridge, B G -- Holben, B N -- New York, N.Y. -- Science. 1997 Oct 31;278(5339):827-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Meteorology, University of Maryland, College Park, MD 20742, USA. russ@atmos.umd.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9346474" target="_blank"〉PubMed〈/a〉
Keywords:
*Aerosols
;
Computer Simulation
;
Models, Theoretical
;
Ozone
;
Photochemistry
;
Scattering, Radiation
;
*Smog
;
*Ultraviolet Rays
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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