Spectroscopic signatures of ozone at the air-water interface and photochemistry implications

Josep M. Anglada; Marilia Martins-Costa; Manuel F. Ruiz-LópezJoseph S. Francisco

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Spectroscopic signatures of ozone at the air-water interface and photochemistry implications

机译：Spectroscopic signatures of ozone at the air-water interface and photochemistry implications

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First-principles simulations suggest that additional OH formation in the troposphere can result from ozone interactions with the surface of cloud droplets. Ozone exhibits an affinity for the air-water interface, which modifies its UV and visible light spectroscopic signatures and photolytic rate constant in the troposphere. Ozone cross sections on the red side of the Hartley band (290-to 350-nm region) and in the Chappuis band (450-700 nm) are increased due to electronic ozone-water interactions. This effect, combined with the potential contribution of the O_3 + hν → O(~3P) + O_2(X~3Σg~-) photolytic channel at the interface, leads to an enhancement of the OH radical formation rate by four orders of magnitude. This finding suggests that clouds can influence the overall oxidizing capacity of the troposphere on a global scale by stimulating the production of OH radicals through ozone photolysis by UV and visible light at the air-water interface.

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《Proceedings of the National Academy of Sciences of the United States of America》 |2014年第32期|11618-11623|共6页
作者
Josep M. Anglada; Marilia Martins-Costa; Manuel F. Ruiz-LópezJoseph S. Francisco;
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作者单位

Departament de Química Biològica i Modelització Molecular (Institut de Química Avan?ada de Catalunya-Consejo Superior de Investigaciones Cientificas), E-08034 Barcelona, Spain;

Laboratoire Structure et Réactivité des Systèmes Moléculaires Complexes, University of Lorraine, 54506 Vandoeuvre-lès-Nancy, France;

Department of Chemistry, Purdue University, West Lafayette, IN 47907-2084;

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收录信息美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类自然科学总论;
关键词
atmospheric chemistry; heterogeneous processes; reactive oxidant species; computer simulations;

Spectroscopic signatures of ozone at the air-water interface and photochemistry implications

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