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dc.contributor.authorSmith, Felisa, A.
dc.contributor.authorChoi, Yunsoo
dc.contributor.authorElliott, Scott
dc.contributor.authorSimpson, Isobel J.
dc.contributor.authorBlake, Donald R.
dc.contributor.authorColman, Jonah J.
dc.contributor.authorDubey, Manvendra K.
dc.contributor.authorMeinardi, Simone
dc.contributor.authorRowland, F. Sherwood
dc.contributor.authorShirai, Tomoko
dc.date.accessioned2011-08-23T23:52:57Z
dc.date.available2011-08-23T23:52:57Z
dc.date.issued2003-03
dc.identifier.citationJOURNAL OF GEOPHYSICAL RESEARCH, VOL. 108, NO. D5, 4163, doi:10.1029/2002JD002841, 2003en_US
dc.identifier.issn0148-0227
dc.identifier.urihttp://hdl.handle.net/1928/13066
dc.description.abstractHydrocarbon and halocarbon measurements collected during the second airborne Biomass Burning and Lightning Experiment (BIBLE-B) were subjected to a principal component analysis (PCA), to test the capability for identifying intercorrelated compounds within a large whole air data set. The BIBLE expeditions have sought to quantify and understand the products of burning, electrical discharge, and general atmospheric chemical processes during flights arrayed along the western edge of the Pacific. Principal component analysis was found to offer a compact method for identifying the major modes of composition encountered in the regional whole air data set. Transecting the continental monsoon, urban and industrial tracers (e.g., combustion byproducts, chlorinated methanes and ethanes, xylenes, and longer chain alkanes) dominated the observed variability. Pentane enhancements reflected vehicular emissions. In general, ethyl and propyl nitrate groupings indicated oxidation under nitrogen oxide (NOx) rich conditions and hence city or lightning influences. Over the tropical ocean, methyl nitrate grouped with brominated compounds and sometimes with dimethyl sulfide and methyl iodide. Biomass burning signatures were observed during flights over the Australian continent. Strong indications of wetland anaerobics (methane) or liquefied petroleum gas leakage (propane) were conspicuous by their absence. When all flights were considered together, sources attributable to human activity emerged as the most important. We suggest that factor reductions in general and PCA in particular may soon play a vital role in the analysis of regional whole air data sets, as a complement to more familiar methods.en_US
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.subjectwhole air samplesen_US
dc.subjecthydrocarbonsen_US
dc.subjecthalocarbonsen_US
dc.subjectprincipal component analysisen_US
dc.subjectBIBLE-Ben_US
dc.titleSurvey of whole air data from the second airborne Biomass Burning and Lightning Experiment using principal component analysisen_US
dc.typeArticleen_US


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