Interactive comment on “ Characterization of particulate matter emissions from on-road gasoline and diesel vehicles using a soot particle aerosol mass spectrometer ”

Content Provider	Semantic Scholar
Author	Dallmann, Timothy R. Onasch, Timothy B. Worton, David R. Herndon, Scott C. Worsnop, Douglas R. Harley, Robert A.
Copyright Year	2014
Abstract	Overview and general comments This MS presents an array of useful data obtained during a tunnel study of the combustion emissions from a large number of heavy duty diesel vehicles (HDDVs). A soot particle aerosol mass spectrometer (SP-AMS) was used in conjunction with a multi-angle absorption photometer (MAPP), an OC/EC analyzer and gravimetric analysis of Teflon filters (and additional gas phase instruments). Data from these instruments support the authors’ four main conclusions. First, they conclude that although the sensitivity of the SP-AMS is approximately a factor of four lower than that of the MAPP, the correlation between the two instruments is excellent, as is the correlation with Teflon filter PM mass. Second, the chemical composition of the emissions was surprisingly consistent for the test fleet; both the hydrocarbon ion series and the trace element analysis suggest that lubricating oil dominates contributions from diesel fuel in the HDDV combustion emissions. Third, given the cited similarity in chemical composition of oils used for gasoline and diesel vehicles, the measured similarity between the OA mass spectra for gasolineand diesel-dominated sampling periods suggests that much of the OA from gasoline vehicles is due to lubricating oil. Fourth, this similarity between the OA mass spectra for gasolineand diesel-dominated sampling periods is likely to confound efforts to apportion air pollution contributions from these two on-road sources. This manuscript is clear, well-written and relatively free of faults—typographical, dictional or structural. In short, I was pleased to see that the authors took a similar degree of concern with communicating their scientific results as they did in carrying out the science itself. Therefore, my comments are mostly restricted to minor edits, although I do suggest a couple of thoughts for further consideration.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://www.atmos-chem-phys-discuss.net/14/4007/2014/acp-2013-1006-manuscript-version2.pdf
Alternate Webpage(s)	https://nature.berkeley.edu/ahg/pubs/Dallman_etal_acp-2014.pdf
Alternate Webpage(s)	https://www.atmos-chem-phys-discuss.net/14/C1352/2014/acpd-14-C1352-2014-supplement.pdf
Alternate Webpage(s)	https://www.atmos-chem-phys-discuss.net/14/4007/2014/acpd-14-4007-2014.pdf
Alternate Webpage(s)	https://www.atmos-chem-phys.net/14/7585/2014/acp-14-7585-2014-supplement.pdf
Alternate Webpage(s)	https://www.atmos-chem-phys-discuss.net/14/4007/2014/acpd-14-4007-2014-AR1.pdf
Alternate Webpage(s)	https://www.atmos-chem-phys-discuss.net/14/C1352/2014/acpd-14-C1352-2014.pdf
Language	English
Access Restriction	Open
Subject Keyword	Aerosol Dose Form Air Pollution Alkanes Carbon Black Common Object Request Broker Architecture Cycloparaffins Diesel Drug vehicle Emission - Male genitalia finding Emission intensity Engine Exhaust Gasoline Heavy Ion Radiotherapy Lubricants Mass Spectrometers (device) Neoplasms, Unknown Primary OLED Particulate Matter Phosphorus Sampling (signal processing) Saturated abdominal dressings:Num:Pt:Wound:Qn Soot Trace Elements Tunneling protocol Verilog-AMS ferrosoferric oxide
Content Type	Text
Resource Type	Article