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
Abstract
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 aremore »
- Authors:
-
[1];
[3]
- Univ. of California, Davis, CA (United States). Dept. of Land Air and Water Resources; National Center for Atmospheric Research, Boulder, CO (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Univ. of California, Davis, CA (United States). Dept. of Land Air and Water Resources
- Univ. of Utah, Salt Lake City, UT (United States). Atmospheric Sciences
- Univ. of California, Davis, CA (United States). Air Quality Research Center
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1561890
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Geophysical Research: Atmospheres
- Additional Journal Information:
- Journal Volume: 123; Journal Issue: 10; Journal ID: ISSN 2169-897X
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES
Citation Formats
Asher, Elizabeth C., Christensen, John N., Post, Andrew, Perry, Kevin, Cliff, Steven S., Zhao, Yongjing, Trousdell, Justin, and Faloona, Ian. 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. United States: N. p., 2018.
Web. doi:10.1029/2017JD028075.
Asher, Elizabeth C., Christensen, John N., Post, Andrew, Perry, Kevin, Cliff, Steven S., Zhao, Yongjing, Trousdell, Justin, & Faloona, Ian. 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. United States. https://doi.org/10.1029/2017JD028075
Asher, Elizabeth C., Christensen, John N., Post, Andrew, Perry, Kevin, Cliff, Steven S., Zhao, Yongjing, Trousdell, Justin, and Faloona, Ian. Mon .
"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". United States. https://doi.org/10.1029/2017JD028075. https://www.osti.gov/servlets/purl/1561890.
@article{osti_1561890,
title = {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},
author = {Asher, Elizabeth C. and Christensen, John N. and Post, Andrew and Perry, Kevin and Cliff, Steven S. and Zhao, Yongjing and Trousdell, Justin and Faloona, Ian},
abstractNote = {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.},
doi = {10.1029/2017JD028075},
journal = {Journal of Geophysical Research: Atmospheres},
number = 10,
volume = 123,
place = {United States},
year = {Mon May 14 00:00:00 EDT 2018},
month = {Mon May 14 00:00:00 EDT 2018}
}
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Cited by: 6 works
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Figures / Tables:
Figure 1: Compilation of Pb isotope data from XRF‐RDI samples from Chews Ridge, as well as samples from throughout northern and central California and Asia. Inset illustrates how the %Asian Pb (of total Pb) is derived. Data from Bollhöfer and Rosman (2001, 2002), Tan et al. (2006), Díaz‐Somoano et al.,more »
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