globalchange  > 气候减缓与适应
DOI: 10.1029/2017JD028075
Scopus记录号: 2-s2.0-85047662393
论文题名:
The Transport of Asian Dust and Combustion Aerosols and Associated Ozone to North America as Observed From a Mountaintop Monitoring Site in the California Coast Range
作者: Asher E.C.; Christensen J.N.; Post A.; Perry K.; Cliff S.S.; Zhao Y.; Trousdell J.; Faloona I.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:10
起始页码: 5667
结束页码: 5680
语种: 英语
英文关键词: aerosol transport ; exogenous ozone ; particle nucleation
英文摘要: Aerosol and tropospheric ozone transport to North America has important implications for regional air quality and climate. We present data from Chews Ridge, a remote mountaintop site in California, in February–September 2012, which identifies separate Asian dust and Asian combustion aerosol signals and quantifies exogenous ozone. We use positive matrix factorization of size-fractionated aerosol X-ray fluorescence data and 206Pb/207Pb and 208Pb/207Pb isotope measurements to isolate aerosol signals of Asian origins and find good agreement between both types source attribution techniques. Power spectra of Asian dust and Asian combustion signals reveal two distinct peaks, one seasonal (~90 days) and one monthly (~25–30 days). Overall, 89% of the Asian dust signal occurs in March–May, compared with June–September, whereas only 51% of the Asian combustion signal occurs in March–May. Nearly half the Pb observed at Chews Ridge was derived from Asia (46%; 8.3% from Asian dust, 23% from Asian combustion, and 15% of the Asian Pb signal was not explained by the positive matrix factorization). A positive correlation between deseasonalized ozone concentrations and the Asian factors suggests that ozone is elevated by 6.3 ± 0.8 ppb due to transpacific transport. Scanning mobility particle size spectra were also measured from May to September and indicate that new particles are often produced and grow throughout the afternoon during onshore flow. We hypothesize that particle nucleation on the windward edge of the continent is an important source of new particles. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113876
Appears in Collections:气候减缓与适应

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作者单位: Department of Land Air and Water Resources, University of California, Davis, CA, United States; Now at the National Center for Atmospheric Research, Boulder, CO, United States; Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Now at California Air Resources Board, Sacramento, CA, United States; Atmospheric Sciences, University of Utah, Salt Lake City, UT, United States; Air Quality Research Center, University of California, Davis, CA, United States

Recommended Citation:
Asher E.C.,Christensen J.N.,Post A.,et al. The Transport of Asian Dust and Combustion Aerosols and Associated Ozone to North America as Observed From a Mountaintop Monitoring Site in the California Coast Range[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(10)
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