Explaining trends in tropospheric mercury using global modeling
Multiple observational analyses have identified a decreasing trend over the past decade in surface concentrations of gaseous elemental mercury (GEM), from sites in both the Northern and Southern hemisphere. We use two model-based approaches to identify sets of parameters that could quantitatively ex...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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2015
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| Online Access: | http://hdl.handle.net/1721.1/93233 https://orcid.org/0000-0002-6396-5622 https://orcid.org/0000-0001-6395-7422 |
| _version_ | 1811086775544709120 |
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| author | Song, Shaojie Selin, Noelle E |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Song, Shaojie Selin, Noelle E |
| author_sort | Song, Shaojie |
| collection | MIT |
| description | Multiple observational analyses have identified a decreasing trend over the past decade in surface concentrations of gaseous elemental mercury (GEM), from sites in both the Northern and Southern hemisphere. We use two model-based approaches to identify sets of parameters that could quantitatively explain observed trends in mercury. Using a 12-box model, we quantify which combinations of factors including changes in anthropogenic emissions, oceanic and land evasion, and atmospheric oxidation rates that can explain observed tropospheric mercury decreases. We then use the GEOS-Chem chemical transport model to further examine source attribution at measurement sites where decreasing trends have been observed. We combine these analyses to generate quantitative hypotheses to explain observed trends. We suggest that the tropospheric decline may be best explained by multiple, reinforcing factors. |
| first_indexed | 2024-09-23T13:34:33Z |
| format | Article |
| id | mit-1721.1/93233 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:34:33Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | mit-1721.1/932332024-05-15T03:17:03Z Explaining trends in tropospheric mercury using global modeling Song, Shaojie Selin, Noelle E Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Massachusetts Institute of Technology. Engineering Systems Division Selin, Noelle Eckley Song, Shaojie Multiple observational analyses have identified a decreasing trend over the past decade in surface concentrations of gaseous elemental mercury (GEM), from sites in both the Northern and Southern hemisphere. We use two model-based approaches to identify sets of parameters that could quantitatively explain observed trends in mercury. Using a 12-box model, we quantify which combinations of factors including changes in anthropogenic emissions, oceanic and land evasion, and atmospheric oxidation rates that can explain observed tropospheric mercury decreases. We then use the GEOS-Chem chemical transport model to further examine source attribution at measurement sites where decreasing trends have been observed. We combine these analyses to generate quantitative hypotheses to explain observed trends. We suggest that the tropospheric decline may be best explained by multiple, reinforcing factors. National Science Foundation (U.S.) (Atmospheric Chemistry Program Grant 1053648) 2015-01-30T18:22:40Z 2015-01-30T18:22:40Z 2013-04 Article http://purl.org/eprint/type/ConferencePaper 2267-1242 http://hdl.handle.net/1721.1/93233 Selin, N. E., and S. Song. “Explaining Trends in Tropospheric Mercury Using Global Modeling.” Edited by Nicola Pirrone. E3S Web of Conferences 1 (2013): 07003. https://orcid.org/0000-0002-6396-5622 https://orcid.org/0000-0001-6395-7422 en_US http://dx.doi.org/10.1051/e3sconf/20130107003 E3S Web of Conferences Creative Commons Attribution http://creativecommons.org/licenses/by/2.0 application/pdf E3s Web of Conferences |
| spellingShingle | Song, Shaojie Selin, Noelle E Explaining trends in tropospheric mercury using global modeling |
| title | Explaining trends in tropospheric mercury using global modeling |
| title_full | Explaining trends in tropospheric mercury using global modeling |
| title_fullStr | Explaining trends in tropospheric mercury using global modeling |
| title_full_unstemmed | Explaining trends in tropospheric mercury using global modeling |
| title_short | Explaining trends in tropospheric mercury using global modeling |
| title_sort | explaining trends in tropospheric mercury using global modeling |
| url | http://hdl.handle.net/1721.1/93233 https://orcid.org/0000-0002-6396-5622 https://orcid.org/0000-0001-6395-7422 |
| work_keys_str_mv | AT songshaojie explainingtrendsintroposphericmercuryusingglobalmodeling AT selinnoellee explainingtrendsintroposphericmercuryusingglobalmodeling |