Global and regional effects of the photochemistry of CH₃O₂NO₂: evidence from ARCTAS
| dc.contributor.author | Browne, E. C. | |
| dc.contributor.author | Perring, A. E. | |
| dc.contributor.author | Wooldridge, P. J. | |
| dc.contributor.author | Apel, E. | |
| dc.contributor.author | Hall, S. R. | |
| dc.contributor.author | Huey, L. G. | |
| dc.contributor.author | Mao, J. | |
| dc.contributor.author | Spencer, K.M. | |
| dc.contributor.author | St. Clair, Jason | |
| dc.contributor.author | Weinheimer, A. J. | |
| dc.contributor.author | Wisthaler, A. | |
| dc.contributor.author | Cohen, R. C. | |
| dc.date.accessioned | 2020-06-18T17:01:49Z | |
| dc.date.available | 2020-06-18T17:01:49Z | |
| dc.date.issued | 2011-05-06 | |
| dc.description.abstract | Using measurements from the NASA Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) experiment, we show that methyl peroxy nitrate (CH₃O₂NO₂) is present in concentrations of ~5–15 pptv in the springtime arctic upper troposphere. We investigate the regional and global effects of CH₃O₂NO₂ by including its chemistry in the GEOS-Chem 3-D global chemical transport model. We find that at temperatures below 240 K inclusion of CH₃O₂NO₂ chemistry results in decreases of up to ~20 % in NOₓ, ~20 % in N₂O₅, ~5 % in HNO₃, ~2 % in ozone, and increases in methyl hydrogen peroxide of up to ~14 %. Larger changes are observed in biomass burning plumes lofted to high altitude. Additionally, by sequestering NOₓ at low temperatures, CH₃O₂NO₂ decreases the cycling of HO₂ to OH, resulting in a larger upper tropospheric HO₂ to OH ratio. These results may impact some estimates of lightning NOₓ sources as well as help explain differences between models and measurements of upper tropospheric composition. | en_US |
| dc.description.sponsorship | The analysis described here was funded by NASA grant NNX08AE56G and a NASA Earth Systems Science Fellowship to ECB. Acetone measurements were supported by the Austrian Research Promotion Agency (FFG-ALR) and the Tiroler Zukunftstiftung and carried out with the help/support of T. Mikoviny, M. Graus, A. Hansel and T. D. Maerk. We thank William H. Brune for use of the OH and HO2 measurements, Glenn Diskin for use of the methane and water measurements, and John D. Crounse and Paul O. Wennberg for the use of California Institute of Technology CIMS data. We also thank the ground and flight crews of the DC-8 for their hard work and logistical support during ARCTAS and the ARCTAS science team for their hard work. ECB would like to thank Rynda Hudman for her help with setting up the GEOS-Chem model. | en_US |
| dc.description.uri | https://www.atmos-chem-phys.net/11/4209/2011/ | en_US |
| dc.format.extent | 11 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m2hkqx-4dbm | |
| dc.identifier.citation | Browne, E. C., Perring, A. E., Wooldridge, P. J., Apel, E., Hall, S. R., Huey, L. G., Mao, J., Spencer, K. M., Clair, J. M. St., Weinheimer, A. J., Wisthaler, A., and Cohen, R. C.: Global and regional effects of the photochemistry of CH₃O₂NO₂: evidence from ARCTAS, Atmos. Chem. Phys., 11, 4209–4219, https://doi.org/10.5194/acp-11-4209-2011, 2011. | en_US |
| dc.identifier.uri | https://doi.org/10.5194/acp-11-4209-2011 | |
| dc.identifier.uri | http://hdl.handle.net/11603/18925 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Copernicus Publications | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Joint Center for Earth Systems Technology | |
| dc.rights | This 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.rights | Attribution 3.0 Unported | * |
| dc.rights.uri | https://creativecommons.org/licenses/by/3.0/ | * |
| dc.title | Global and regional effects of the photochemistry of CH₃O₂NO₂: evidence from ARCTAS | en_US |
| dc.type | Text | en_US |