A Global Assessment of Dissolved Organic Carbon in Precipitation
Precipitation is the largest physical removal pathway of atmospheric reactive organic carbon in the form of dissolved organic carbon (DOC). We present the first global DOC distribution simulated with a global model. A total of 85 and 188 Tg C yr⁻¹ are deposited to the ocean and the land, respectivel...
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Geophysical Union (AGU)
2018
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| Online Access: | http://hdl.handle.net/1721.1/119016 https://orcid.org/0000-0002-8947-7950 https://orcid.org/0000-0003-2894-5738 |
| _version_ | 1826190839666180096 |
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| author | 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 Safieddine, Sarah Heald, Colette L. |
| author_sort | Safieddine, Sarah |
| collection | MIT |
| description | Precipitation is the largest physical removal pathway of atmospheric reactive organic carbon in the form of dissolved organic carbon (DOC). We present the first global DOC distribution simulated with a global model. A total of 85 and 188 Tg C yr⁻¹ are deposited to the ocean and the land, respectively, with DOC ranging between 0.1 and 10 mg C L⁻¹ in this GEOS‐Chem simulation. We compare the 2010 simulated DOC to a 30 year synthesis of measurements. Despite limited measurements and imperfect temporal matching, the model is able to reproduce much of the spatial variability of DOC (r = 0.63), with a low bias of 35%. We present the global average carbon oxidation state (OS[overline][subscript c]) as a simple metric for describing the chemical composition. In the atmosphere, -1.8 ≤ OS[overline][subscript c] ≤ -0.6, and the increase in solubility upon oxidation leads to a global increase in (OS[overline][subscript c]) in precipitation with -0.6 ≤OS[overline][subscript c] ≤ 0. Keywords: dissolved organic carbon; average carbon oxidation state; GEOS-Chem |
| first_indexed | 2024-09-23T08:46:26Z |
| format | Article |
| id | mit-1721.1/119016 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:46:26Z |
| publishDate | 2018 |
| publisher | American Geophysical Union (AGU) |
| record_format | dspace |
| spelling | mit-1721.1/1190162022-09-30T11:10:36Z A Global Assessment of Dissolved Organic Carbon in Precipitation Safieddine, Sarah Heald, Colette L. Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Colette L. Heald Safieddine, Sarah Heald, Colette L. Precipitation is the largest physical removal pathway of atmospheric reactive organic carbon in the form of dissolved organic carbon (DOC). We present the first global DOC distribution simulated with a global model. A total of 85 and 188 Tg C yr⁻¹ are deposited to the ocean and the land, respectively, with DOC ranging between 0.1 and 10 mg C L⁻¹ in this GEOS‐Chem simulation. We compare the 2010 simulated DOC to a 30 year synthesis of measurements. Despite limited measurements and imperfect temporal matching, the model is able to reproduce much of the spatial variability of DOC (r = 0.63), with a low bias of 35%. We present the global average carbon oxidation state (OS[overline][subscript c]) as a simple metric for describing the chemical composition. In the atmosphere, -1.8 ≤ OS[overline][subscript c] ≤ -0.6, and the increase in solubility upon oxidation leads to a global increase in (OS[overline][subscript c]) in precipitation with -0.6 ≤OS[overline][subscript c] ≤ 0. Keywords: dissolved organic carbon; average carbon oxidation state; GEOS-Chem United States. National Oceanic and Atmospheric Administration (Grant NA14OAR4310132) 2018-11-14T19:29:22Z 2018-11-14T19:29:22Z 2017-11 2017-08 Article http://purl.org/eprint/type/JournalArticle 0094-8276 http://hdl.handle.net/1721.1/119016 Safieddine, Sarah A. and Colette L. Heald. “A Global Assessment of Dissolved Organic Carbon in Precipitation.” Geophysical Research Letters 44, 22 (November 2017): 11,672–11,681 © 2017 American Geophysical Union https://orcid.org/0000-0002-8947-7950 https://orcid.org/0000-0003-2894-5738 en_US http://dx.doi.org/10.1002/2017GL075270 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) Prof. Heald via Elizabeth Soergel |
| spellingShingle | Safieddine, Sarah Heald, Colette L. A Global Assessment of Dissolved Organic Carbon in Precipitation |
| title | A Global Assessment of Dissolved Organic Carbon in Precipitation |
| title_full | A Global Assessment of Dissolved Organic Carbon in Precipitation |
| title_fullStr | A Global Assessment of Dissolved Organic Carbon in Precipitation |
| title_full_unstemmed | A Global Assessment of Dissolved Organic Carbon in Precipitation |
| title_short | A Global Assessment of Dissolved Organic Carbon in Precipitation |
| title_sort | global assessment of dissolved organic carbon in precipitation |
| url | http://hdl.handle.net/1721.1/119016 https://orcid.org/0000-0002-8947-7950 https://orcid.org/0000-0003-2894-5738 |
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