Regional‐Scale Ozone Deposition to North‐East Atlantic Waters
A regional climate model is used to evaluate dry deposition of ozone over the North East Atlantic. Results are presented for a deposition scheme accounting for turbulent and chemical enhancement of oceanic ozone deposition and a second non‐chemical, parameterised gaseous dry deposition scheme. The f...
Published in: | Advances in Meteorology |
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crwiley:10.1155/2010/243701 2024-09-09T19:58:28+00:00 Regional‐Scale Ozone Deposition to North‐East Atlantic Waters Coleman, L. Varghese, S. Tripathi, O. P. Jennings, S. G. O′Dowd, C. D. Vignati, Elisabetta Environmental Protection Agency 2010 http://dx.doi.org/10.1155/2010/243701 http://downloads.hindawi.com/journals/amete/2010/243701.pdf http://downloads.hindawi.com/journals/amete/2010/243701.xml https://onlinelibrary.wiley.com/doi/pdf/10.1155/2010/243701 en eng Wiley http://creativecommons.org/licenses/by/3.0/ Advances in Meteorology volume 2010, issue 1 ISSN 1687-9309 1687-9317 journal-article 2010 crwiley https://doi.org/10.1155/2010/243701 2024-06-20T04:22:12Z A regional climate model is used to evaluate dry deposition of ozone over the North East Atlantic. Results are presented for a deposition scheme accounting for turbulent and chemical enhancement of oceanic ozone deposition and a second non‐chemical, parameterised gaseous dry deposition scheme. The first deposition scheme was constrained to account for sea‐surface ozone‐iodide reactions and the sensitivity of modelled ozone concentrations to oceanic iodide concentration was investigated. Simulations were also performed using nominal reaction rate derived from in-situ ozone deposition measurements and using a preliminary representation of organic chemistry. Results show insensitivity of ambient ozone concentrations modelled by the chemical‐enhanced scheme to oceanic iodide concentrations, and iodide reactions alone cannot account for observed deposition velocities. Consequently, we suggest a missing chemical sink due to reactions of ozone with organic matter at the air‐sea interface. Ozone loss rates are estimated to be in the range of 0.5–6 ppb per day. A potentially significant ozone‐driven flux of iodine to the atmosphere is estimated to be in the range of 2.5–500 M molec cm −2 s −1 , leading to a mixing‐layer enhancement of organo‐iodine concentrations of 0.1–22.0 ppt, with an average increase in the N.E. Atlantic of around 4 ppt per day. Article in Journal/Newspaper North East Atlantic Wiley Online Library Advances in Meteorology 2010 1 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
A regional climate model is used to evaluate dry deposition of ozone over the North East Atlantic. Results are presented for a deposition scheme accounting for turbulent and chemical enhancement of oceanic ozone deposition and a second non‐chemical, parameterised gaseous dry deposition scheme. The first deposition scheme was constrained to account for sea‐surface ozone‐iodide reactions and the sensitivity of modelled ozone concentrations to oceanic iodide concentration was investigated. Simulations were also performed using nominal reaction rate derived from in-situ ozone deposition measurements and using a preliminary representation of organic chemistry. Results show insensitivity of ambient ozone concentrations modelled by the chemical‐enhanced scheme to oceanic iodide concentrations, and iodide reactions alone cannot account for observed deposition velocities. Consequently, we suggest a missing chemical sink due to reactions of ozone with organic matter at the air‐sea interface. Ozone loss rates are estimated to be in the range of 0.5–6 ppb per day. A potentially significant ozone‐driven flux of iodine to the atmosphere is estimated to be in the range of 2.5–500 M molec cm −2 s −1 , leading to a mixing‐layer enhancement of organo‐iodine concentrations of 0.1–22.0 ppt, with an average increase in the N.E. Atlantic of around 4 ppt per day. |
author2 |
Vignati, Elisabetta Environmental Protection Agency |
format |
Article in Journal/Newspaper |
author |
Coleman, L. Varghese, S. Tripathi, O. P. Jennings, S. G. O′Dowd, C. D. |
spellingShingle |
Coleman, L. Varghese, S. Tripathi, O. P. Jennings, S. G. O′Dowd, C. D. Regional‐Scale Ozone Deposition to North‐East Atlantic Waters |
author_facet |
Coleman, L. Varghese, S. Tripathi, O. P. Jennings, S. G. O′Dowd, C. D. |
author_sort |
Coleman, L. |
title |
Regional‐Scale Ozone Deposition to North‐East Atlantic Waters |
title_short |
Regional‐Scale Ozone Deposition to North‐East Atlantic Waters |
title_full |
Regional‐Scale Ozone Deposition to North‐East Atlantic Waters |
title_fullStr |
Regional‐Scale Ozone Deposition to North‐East Atlantic Waters |
title_full_unstemmed |
Regional‐Scale Ozone Deposition to North‐East Atlantic Waters |
title_sort |
regional‐scale ozone deposition to north‐east atlantic waters |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1155/2010/243701 http://downloads.hindawi.com/journals/amete/2010/243701.pdf http://downloads.hindawi.com/journals/amete/2010/243701.xml https://onlinelibrary.wiley.com/doi/pdf/10.1155/2010/243701 |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
Advances in Meteorology volume 2010, issue 1 ISSN 1687-9309 1687-9317 |
op_rights |
http://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.1155/2010/243701 |
container_title |
Advances in Meteorology |
container_volume |
2010 |
container_issue |
1 |
_version_ |
1809929484801933312 |