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http://dx.doi.org/10.5467/JKESS.2013.34.7.662

Effects of the El Niño on Tropospheric Ozone in a Simulation using a Climate-Chemistry Model  

Moon, Byung-Kwon (Division of Science Education / Institute of Fusion Science, Chonbuk National University)
Yeh, Sang-Wook (Department of Marine Sciences and Convergent Technology, Hanyang University)
Park, Rokjin J. (School of Earth and Environmental Sciences, Seoul National University)
Song, Chang-Keun (Climate Change Research Division, National Institute of Environmental Research)
Youn, Daeok (Department of Science Education, Chungbuk National University)
Publication Information
Journal of the Korean earth science society / v.34, no.7, 2013 , pp. 662-668 More about this Journal
Abstract
We examine the effects of El Ni$\tilde{n}$o on tropospheric ozone through the simulation of a Climate-Chemistry model for a 40-year period (1971-2010). The Empirical Orthogonal Function (EOF) analysis reveals that the tropospheric ozone concentration in the central-eastern Pacific decreases when the El Ni$\tilde{n}$o occurs, which is consistent with the observation. However, the increase of ozone over Indian Ocean-Indonesia regions is weak in the simulation compared to the observations. We analyze details of the 2006 El Ni$\tilde{n}$o event to understand the mechanism that caused the change of ozone due to El Ni$\tilde{n}$o. It is found that enhanced convection as well as higher water vapor followed by shortened lifetime has led to lower the tropospheric ozone. Downward motion induced by the changes of atmospheric circulation due to sea surface temperature forcing, together with the decrease of water vapor, has brought ozone produced in the upper troposphere over the Indian Ocean.
Keywords
climate model; global atmospheric chemistry model; tropospheric ozone; El Ni$\tilde{n}$o;
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Times Cited By KSCI : 2  (Citation Analysis)
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