globalchange  > 气候减缓与适应
DOI: 10.1002/grl.50591
论文题名:
Improving simulations of fine dust surface concentrations over the western United States by optimizing the particle size distribution
作者: Zhang L.; Kok J.F.; Henze D.K.; Li Q.; Zhao C.
刊名: Geophysical Research Letters
ISSN: 0094-8841
EISSN: 1944-8572
出版年: 2013
卷: 40, 期:12
起始页码: 3270
结束页码: 3275
语种: 英语
英文关键词: fine dust ; GEOS-Chem ; particle size distribution
Scopus关键词: Chemical transport models ; Fine dusts ; Fine particulate matter ; Fragmentation theory ; GEOS-Chem ; Root-mean square errors ; Surface observation ; Western United States ; Particle size ; Particle size analysis ; Particles (particulate matter) ; Size distribution ; Dust ; atmospheric modeling ; concentration (composition) ; dust ; emission control ; particle size ; particulate matter ; size distribution ; United States
英文摘要: To improve estimates of remote contributions of dust to fine particulate matter (PM2.5) in the western United States, new dust particle size distributions (PSDs) based upon scale-invariant fragmentation theory (Kok-PSD) with constraints from in situ measurements (IMP-PSD) are implemented in a chemical transport model (GEOS-Chem). Compared to initial simulations, this leads to reductions in the mass of emitted dust particles with radii <1.8 μm by 40%-60%. Consequently, the root-mean-square error in simulated fine dust concentrations compared to springtime surface observations in the western United States is reduced by 67%-81%. The ratio of simulated fine to coarse PM mass is also improved, which is not achievable by reductions in total dust emissions. The IMP-PSD best represents the PSD of dust transported from remote sources and reduces modeled PM2.5 concentrations up to 5 μg/m 3 over the western United States, which is important when considering sources contributing to nonattainment of air quality standards. Key Points Improve the dust simulation by using new dust particle size distributions Improve the ratio of simulated fine dust to coarse dust mass Improve the estimates of remote contributions of dust to PM2.5 in the western US ©2013. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880545878&doi=10.1002%2fgrl.50591&partnerID=40&md5=845ecb2f6e1c287d6946296beba4b26a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6105
Appears in Collections:气候减缓与适应

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作者单位: Department of Mechanical Engineering, University of Colorado Boulder, 1111 Engineering Drive, ECME 114, Boulder, CO 80309, United States

Recommended Citation:
Zhang L.,Kok J.F.,Henze D.K.,et al. Improving simulations of fine dust surface concentrations over the western United States by optimizing the particle size distribution[J]. Geophysical Research Letters,2013-01-01,40(12).
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