The global nonmethane reactive organic carbon budget: A modeling perspective
The cycling of reactive organic carbon (ROC) is central to tropospheric chemistry. We characterize the global tropospheric ROC budget as simulated with the GEOS-Chem model. We expand the standard simulation by including new emissions and gas-phase chemistry, an expansion of dry and wet removal, and...
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Geophysical Union (AGU)
2017
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| Online Access: | http://hdl.handle.net/1721.1/110357 https://orcid.org/0000-0002-8947-7950 https://orcid.org/0000-0003-2894-5738 |
| _version_ | 1826197299181649920 |
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| author | Henderson, Barron H. Safieddine, Sarah Heald, Colette L. |
| author2 | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Henderson, Barron H. Safieddine, Sarah Heald, Colette L. |
| author_sort | Henderson, Barron H. |
| collection | MIT |
| description | The cycling of reactive organic carbon (ROC) is central to tropospheric chemistry. We characterize the global tropospheric ROC budget as simulated with the GEOS-Chem model. We expand the standard simulation by including new emissions and gas-phase chemistry, an expansion of dry and wet removal, and a mass tracking of all ROC species to achieve carbon closure. The resulting global annual mean ROC burden is 16 Tg C, with sources from methane oxidation and direct emissions contributing 415 and 935 Tg C yr⁻¹. ROC is lost from the atmosphere via physical deposition (460 Tg C yr⁻¹), and oxidation to CO/CO2 (875 Tg C yr⁻¹). Ketones, alkanes, alkenes, and aromatic hydrocarbons dominate the ROC burden, whereas aldehydes and isoprene dominate the ROC global mean surface OH reactivity. Simulated OH reactivities are between 0.8–1 s⁻¹, 3–14 s⁻¹, and 12–34 s⁻¹ over selected regions in the remote ocean, continental midlatitudes, and the tropics, respectively, and are consistent with observational constraints. |
| first_indexed | 2024-09-23T10:45:35Z |
| format | Article |
| id | mit-1721.1/110357 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:45:35Z |
| publishDate | 2017 |
| publisher | American Geophysical Union (AGU) |
| record_format | dspace |
| spelling | mit-1721.1/1103572022-09-27T14:47:34Z The global nonmethane reactive organic carbon budget: A modeling perspective Henderson, Barron H. Safieddine, Sarah Heald, Colette L. Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Safieddine, Sarah Heald, Colette L. The cycling of reactive organic carbon (ROC) is central to tropospheric chemistry. We characterize the global tropospheric ROC budget as simulated with the GEOS-Chem model. We expand the standard simulation by including new emissions and gas-phase chemistry, an expansion of dry and wet removal, and a mass tracking of all ROC species to achieve carbon closure. The resulting global annual mean ROC burden is 16 Tg C, with sources from methane oxidation and direct emissions contributing 415 and 935 Tg C yr⁻¹. ROC is lost from the atmosphere via physical deposition (460 Tg C yr⁻¹), and oxidation to CO/CO2 (875 Tg C yr⁻¹). Ketones, alkanes, alkenes, and aromatic hydrocarbons dominate the ROC burden, whereas aldehydes and isoprene dominate the ROC global mean surface OH reactivity. Simulated OH reactivities are between 0.8–1 s⁻¹, 3–14 s⁻¹, and 12–34 s⁻¹ over selected regions in the remote ocean, continental midlatitudes, and the tropics, respectively, and are consistent with observational constraints. United States. National Oceanic and Atmospheric Administration (NA14OAR4310132) 2017-06-28T18:42:07Z 2017-06-28T18:42:07Z 2017-04 2017-01 Article http://purl.org/eprint/type/JournalArticle 0094-8276 http://hdl.handle.net/1721.1/110357 Safieddine, Sarah A.; Heald, Colette L. and Henderson, Barron H. “The Global Nonmethane Reactive Organic Carbon Budget: A Modeling Perspective.” Geophysical Research Letters 44, no. 8 (April 2017): 3897–3906 © 2017 American Geophysical Union https://orcid.org/0000-0002-8947-7950 https://orcid.org/0000-0003-2894-5738 en_US http://dx.doi.org/10.1002/2017GL072602 Geophysical Research Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Geophysical Union (AGU) MIT Web Domain |
| spellingShingle | Henderson, Barron H. Safieddine, Sarah Heald, Colette L. The global nonmethane reactive organic carbon budget: A modeling perspective |
| title | The global nonmethane reactive organic carbon budget: A modeling perspective |
| title_full | The global nonmethane reactive organic carbon budget: A modeling perspective |
| title_fullStr | The global nonmethane reactive organic carbon budget: A modeling perspective |
| title_full_unstemmed | The global nonmethane reactive organic carbon budget: A modeling perspective |
| title_short | The global nonmethane reactive organic carbon budget: A modeling perspective |
| title_sort | global nonmethane reactive organic carbon budget a modeling perspective |
| url | http://hdl.handle.net/1721.1/110357 https://orcid.org/0000-0002-8947-7950 https://orcid.org/0000-0003-2894-5738 |
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