Show simple item record

dc.contributor.authorVan Damme, Martin
dc.contributor.authorClarisse, Lieven
dc.contributor.authorClerbaux, Cathy
dc.contributor.authorCoheur, Pierre-François
dc.contributor.authorNowak, John B.
dc.contributor.authorNeuman, J. Andrew
dc.contributor.authorHerndon, Scott C.
dc.contributor.authorRoscioli, Joseph R.
dc.contributor.authorEilerman, Scott J.
dc.contributor.authorSchiferl, Luke Daniel
dc.contributor.authorHeald, Colette L.
dc.date.accessioned2017-04-12T19:21:27Z
dc.date.available2017-04-12T19:21:27Z
dc.date.issued2016-09
dc.date.submitted2016-09
dc.identifier.issn1680-7324
dc.identifier.issn1680-7316
dc.identifier.urihttp://hdl.handle.net/1721.1/108079
dc.description.abstractThe variability of atmospheric ammonia (NH[subscript3]), emitted largely from agricultural sources, is an important factor when considering how inorganic fine particulate matter (PM[subscript 2.5]) concentrations and nitrogen cycling are changing over the United States. This study combines new observations of ammonia concentration from the surface, aboard aircraft, and retrieved by satellite to both evaluate the simulation of ammonia in a chemical transport model (GEOS-Chem) and identify which processes control the variability of these concentrations over a 5-year period (2008–2012). We find that the model generally underrepresents the ammonia concentration near large source regions (by 26 % at surface sites) and fails to reproduce the extent of interannual variability observed at the surface during the summer (JJA). Variability in the base simulation surface ammonia concentration is dominated by meteorology (64 %) as compared to reductions in SO[subscript 2] and NO[subscript x] emissions imposed by regulation (32 %) over this period. Introduction of year-to-year varying ammonia emissions based on animal population, fertilizer application, and meteorologically driven volatilization does not substantially improve the model comparison with observed ammonia concentrations, and these ammonia emissions changes have little effect on the simulated ammonia concentration variability compared to those caused by the variability of meteorology and acid-precursor emissions. There is also little effect on the PM[subscript 2.5] concentration due to ammonia emissions variability in the summer when gas-phase changes are favored, but variability in wintertime emissions, as well as in early spring and late fall, will have a larger impact on PM[subscript 2.5] formation. This work highlights the need for continued improvement in both satellite-based and in situ ammonia measurements to better constrain the magnitude and impacts of spatial and temporal variability in ammonia concentrations.en_US
dc.description.sponsorshipUnited States. National Oceanic and Atmospheric Administration (NA12OAR4310064)en_US
dc.language.isoen_US
dc.publisherCopernicus GmbHen_US
dc.relation.isversionofhttp://dx.doi.org/10.5194/acp-16-12305-2016en_US
dc.rightsCreative Commons Attribution 3.0 Licenseen_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en_US
dc.sourceCopernicus Publicationsen_US
dc.titleInterannual variability of ammonia concentrations over the United States: sources and implicationsen_US
dc.typeArticleen_US
dc.identifier.citationSchiferl, Luke D.; Heald, Colette L.; Van Damme, Martin; Clarisse, Lieven; Clerbaux, Cathy; Coheur, Pierre-François; Nowak, John B.; et al. “Interannual Variability of Ammonia Concentrations over the United States: Sources and Implications.” Atmospheric Chemistry and Physics 16, no. 18 (September 29, 2016): 12305–12328.© 2016 Authorsen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Civil and Environmental Engineeringen_US
dc.contributor.mitauthorSchiferl, Luke Daniel
dc.contributor.mitauthorHeald, Colette L.
dc.relation.journalAtmospheric Chemistry and Physicsen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsSchiferl, Luke D.; Heald, Colette L.; Van Damme, Martin; Clarisse, Lieven; Clerbaux, Cathy; Coheur, Pierre-François; Nowak, John B.; Neuman, J. Andrew; Herndon, Scott C.; Roscioli, Joseph R.; Eilerman, Scott J.en_US
dspace.embargo.termsNen_US
dc.identifier.orcidhttps://orcid.org/0000-0002-5047-2490
dc.identifier.orcidhttps://orcid.org/0000-0003-2894-5738
mit.licensePUBLISHER_CCen_US
mit.metadata.statusComplete


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record