Influence of trans-Pacific pollution transport on acyl peroxy nitrate abundances and speciation at Mount Bachelor Observatory during INTEX-B

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dc.contributor.authorWolfe, G.M.
dc.contributor.authorThornton, J. A.
dc.contributor.authorMcNeill, V. F.
dc.contributor.authorJaffe, D. A.
dc.contributor.authorReidmiller, D.
dc.contributor.authorChand, D.
dc.contributor.authorSmith, J.
dc.contributor.authorSwartzendruber, P.
dc.contributor.authorFlocke, F.
dc.contributor.authorZheng, W.
dc.date.accessioned2020-09-17T15:55:24Z
dc.date.available2020-09-17T15:55:24Z
dc.date.issued2007-10-16
dc.description.abstractWe present month-long observations of speciated acyl peroxy nitrates (APNs), including PAN, PPN, MPAN, APAN, and the sum of PiBN and PnBN, measured at the Mount Bachelor Observatory (MBO) as part of the INTEX-B collaborative field campaign during spring 2006. APN abundances, measured by thermal dissociation-chemical ionization mass spectrometry (TD-CIMS), are discussed in terms of differing contributions from the boundary layer (BL) and the free troposphere (FT) and in the context of previous APN measurements in the NE Pacific region. PAN mixing ratios range from 11 to 3955 pptv, with a mean value of 334 pptv for the full measurement period. PPN is linearly correlated with PAN (r2=0.96), with an average abundance of 6.5% relative to PAN; other APNs are generally <1% of PAN. Diurnal cycles and relationships of APNs with ozone reveal a gradient in hydrocarbon chemistry between the BL and the FT. On average, levels of APNs, ozone and PPN/PAN are substantially higher in FT air relative to BL air, suggesting that this site is strongly influenced by distant pollution sources. To estimate the impact of long-range transport of Asian pollution on atmospheric composition at MBO, we perform a detailed analysis utilizing HYSPLIT back trajectories. This analysis suggests that trans-Pacific transport of Asian pollution leads to substantial increases in APN and ozone mixing ratios at MBO, especially when transport occurs via the free troposphere. The ensemble of trajectories indicate that Asian-influenced free tropospheric air was sampled in ~16% of our data and contained a median PAN mixing ratio double that of the full dataset.en_US
dc.description.sponsorshipThe authors thank J. Roberts for providingplans for the PAN calibration source, D. Tanner for providing plans for the octopole ion guide, T. Primbs for levoglucosan data, R. Yatavelli and A. Moon for technical support and helpful discussion, and L. Jaegle for insightful comments on the ´manuscript. We also thank the staff of the Mount Bachelor Ski Resort and C. Higginbotham for their cooperation and assistance. This work was supported by NASA Office of Earth Science grant NIP/03-0000-0025 and NSF-ATM-0613064. G. M. Wolfe was supported by NASA Headquarters under the Earth System Science Fellowship Grant NNG-05GP64H.en_US
dc.description.urihttps://acp.copernicus.org/articles/7/5309/2007/en_US
dc.format.extent17 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2kgvt-inll
dc.identifier.citationWolfe, G. M., Thornton, J. A., McNeill, V. F., Jaffe, D. A., Reidmiller, D., Chand, D., Smith, J., Swartzendruber, P., Flocke, F., and Zheng, W.: Influence of trans-Pacific pollution transport on acyl peroxy nitrate abundances and speciation at Mount Bachelor Observatory during INTEX-B, Atmos. Chem. Phys., 7, 5309–5325, https://doi.org/10.5194/acp-7-5309-2007, 2007.en_US
dc.identifier.urihttps://doi.org/10.5194/acp-7-5309-2007
dc.identifier.urihttp://hdl.handle.net/11603/19670
dc.language.isoen_USen_US
dc.publisherCopernicus Publicationsen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology
dc.relation.ispartofUMBC Physics Department
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rightsPublic Domain Mark 1.0*
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleInfluence of trans-Pacific pollution transport on acyl peroxy nitrate abundances and speciation at Mount Bachelor Observatory during INTEX-Ben_US
dc.typeTexten_US

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