Show simple item record

dc.contributor.authorLiang, Jinyou
dc.contributor.authorHorowitz, Larry W.
dc.contributor.authorJacob, Daniel James
dc.contributor.authorWang, Yuhang
dc.contributor.authorFiore, Arlene M.
dc.contributor.authorLogan, Jennifer A.
dc.contributor.authorGardner, Geraldine M.
dc.contributor.authorMunger, J. William
dc.date.accessioned2015-02-25T20:55:14Z
dc.date.issued1998
dc.identifier.citationLiang, Jinyou, Larry W. Horowitz, Daniel J. Jacob, Yuhang Wang, Arlene M. Fiore, Jennifer A. Logan, Geraldine M. Gardner, and J. William Munger. 1998. “Seasonal Budgets of Reactive Nitrogen Species and Ozone over the United States, and Export Fluxes to the Global Atmosphere.” Journal of Geophysical Research 103 (D11): 13435. doi:10.1029/97jd03126.en_US
dc.identifier.issn0148-0227en_US
dc.identifier.issn2156-2202en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:14034192
dc.description.abstractA three-dimensional, continental-scale photochemical model is used to investigate seasonal budgets of O3 and NOy species (including NOx and its oxidation products) in the boundary layer over the United States and to estimate the export of these species from the U.S. boundary layer to the global atmosphere. Model results are evaluated with year-round observations for O3, CO, and NOy species at nonurban sites. A seasonal transition from NOx to hydrocarbon-limited conditions for O3 production over the eastern United States is found to take place in the fall, with the reverse transition taking place in the spring. The mean NOx/NOy molar ratio in the U.S. boundary layer in the model ranges from 0.2 in summer to 0.6 in winter, in accord with observations, and reflecting largely the seasonal variation in the chemical lifetime of NOx. Formation of hydroxy organic nitrates during oxidation of isoprene, followed by decomposition of these nitrates to HNO3, is estimated to account for 30% of the chemical sink of NOx in the U.S. boundary layer in summer. Model results indicate that peroxyacylnitrates (PANs) are most abundant in the U.S. boundary layer in spring (25% of total NOy.), reflecting a combination of active photochemistry and low temperatures. About 20% of the NOx emitted from fossil fuel combustion in the United States in the model is exported out of the U.S. boundary layer as NOx or PANs (15% in summer, 25% in winter). This export responds less than proportionally to changes in NOx emissions in summer, but more than proportionally in winter. The annual mean export of NOx and PANs from the U.S. boundary layer is estimated to be 1.4 Tg N yr−1, representing an important source of NOx on the scale of the northern hemisphere troposphere. The eventual O3 production in the global troposphere due to the exported NOx and PANs is estimated to be twice as large, on an annual basis, as the direct export of O3 pollution from the U.S. boundary layer. Fossil fuel combustion in the United States is estimated to account for about 10% of the total source of O3 in the northern hemisphere troposphere on an annual basis.en_US
dc.description.sponsorshipEngineering and Applied Sciencesen_US
dc.language.isoen_USen_US
dc.publisherWiley-Blackwellen_US
dc.relation.isversionofdoi:10.1029/97JD03126en_US
dash.licenseLAA
dc.titleSeasonal budgets of reactive nitrogen species and ozone over the United States, and export fluxes to the global atmosphereen_US
dc.typeJournal Articleen_US
dc.description.versionVersion of Recorden_US
dc.relation.journalJournal of Geophysical Researchen_US
dash.depositing.authorJacob, Daniel James
dc.date.available2015-02-25T20:55:14Z
dc.identifier.doi10.1029/97JD03126*
dash.contributor.affiliatedMunger, J.
dash.contributor.affiliatedLogan, Jennifer
dash.contributor.affiliatedJacob, Daniel


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record