A laboratory characterisation of inorganic iodine emissions from the sea surface: dependence on oceanic variables and parameterisation for global modelling
| العنوان: | A laboratory characterisation of inorganic iodine emissions from the sea surface: dependence on oceanic variables and parameterisation for global modelling |
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| المؤلفون: | J. C. Gómez Martín, John M. C. Plane, Alfonso Saiz-Lopez, Stuart L. Warriner, Lucy J. Carpenter, S. M. MacDonald, Rosie Chance |
| المصدر: | Atmospheric Chemistry and Physics, Vol 14, Iss 11, Pp 5841-5852 (2014) Digital.CSIC. Repositorio Institucional del CSIC instname |
| بيانات النشر: | Copernicus Publications, 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | chemistry.chemical_classification, Atmospheric Science, Iodide, chemistry.chemical_element, Iodine, Wind speed, lcsh:QC1-999, Salinity, Troposphere, lcsh:Chemistry, chemistry.chemical_compound, Flux (metallurgy), chemistry, lcsh:QD1-999, Environmental chemistry, Atmospheric chemistry, Iodate, lcsh:Physics |
| الوصف: | Reactive iodine compounds play a significant role in the atmospheric chemistry of the oceanic boundary layer by influencing the oxidising capacity through catalytically removing O3 and altering the HOx and NOx balance. The sea-to-air flux of iodine over the open ocean is therefore an important quantity in assessing these impacts on a global scale. This paper examines the effect of a number of relevant environmental parameters, including water temperature, salinity and organic compounds, on the magnitude of the HOI and I2 fluxes produced from the uptake of O3 and its reaction with iodide ions in aqueous solution. The results of these laboratory experiments and those reported previously (Carpenter et al., 2013), along with sea surface iodide concentrations measured or inferred from measurements of dissolved total iodine and iodate reported in the literature, were then used to produce parameterised expressions for the HOI and I2 fluxes as a function of wind speed, sea-surface temperature and O3. These expressions were used in the Tropospheric HAlogen chemistry MOdel (THAMO) to compare with MAX-DOAS measurements of iodine monoxide (IO) performed during the HaloCAST-P cruise in the eastern Pacific ocean (Mahajan et al., 2012). The modelled IO agrees reasonably with the field observations, although significant discrepancies are found during a period of low wind speeds (< 3 m s−1), when the model overpredicts IO by up to a factor of 3. The inorganic iodine flux contributions to IO are found to be comparable to, or even greater than, the contribution of organo-iodine compounds and therefore its inclusion in atmospheric models is important to improve predictions of the influence of halogen chemistry in the marine boundary layer.©Author(s) 2014. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1680-7324 1680-7316 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5dc1eb1dc0eb5d56b65963fa7166c5c http://www.atmos-chem-phys.net/14/5841/2014/acp-14-5841-2014.pdf |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....e5dc1eb1dc0eb5d56b65963fa7166c5c |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 16807324 16807316 |
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