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http://dx.doi.org/10.5467/JKESS.2009.30.3.282

East Asian Precipitation and Circulation Response to the Madden-Julian Oscillation  

Han, Sang-Dae (Division of Earth Environmental System, Atmospheric Science Major, Pusan National University)
Seo, Kyong-Hwan (Division of Earth Environmental System, Atmospheric Science Major, Pusan National University)
Publication Information
Journal of the Korean earth science society / v.30, no.3, 2009 , pp. 282-293 More about this Journal
Abstract
This study examines the effects of the Madden-Julian oscillation (MJO) or the Intraseasonal Oscillation (ISO) on precipitation, temperature and circulation anomalies over East Asia according to the eight different MJO phases during the winter and summer seasons. A nonlinear response appears the wintertime precipitation pattern during the phase of 3 (where the MJO center is located over the Eastern Indian Ocean) and 8 (where the MJO center is located over the Western Hemisphere) over the Korean Peninsula. That is, for these phases, the positive precipitation anomalies appear for the MJO intensity less than 2 standard deviations while the negative precipitation anomalies appear in the case of the MJO intensity greater than 2 standard deviations. The negative precipitation anomaly in the latter case is duandard d stronger anomalous anticyclone formed over the Korean Peninsula and cold and dry advection by northerly winds. The response of precipitation and circulation to the boreal summer ISO is also investigated.
Keywords
Madden-Julian oscillation; intraseasoanl oscillation; nonlinear response; cold advection; precipitation anomaly;
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