Simulated Impacts of Two Types of El Niño on the Tropical Cyclone Activity over Northwest Pacific

• Main Authors: Ya-Hui Chang, 張雅惠
• Other Authors: Cheng-Ta Chen
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/57983280242097100360

碩士 === 國立臺灣師範大學 === 地球科學系 === 102 === Recently the phenomenon about the existence of two different types of El Niño occurred in tropical Pacific have attracted many studies on the topics and intensive debates. Following these works, whether there are also distinct impacts to global climate from the Eastern-Pacific （EP） and Central-Pacific （CP） El Niño had drawn lots of studies to revisit the ENSO influences. In this study, we analyze the observed events from 59 years（1951-2009）and investigate the different tropical cyclone （TC） frequency and large-scale circulation features between the two types of El Niño in the Western North Pacific. Our study aims at the examination on the model capability in reproducing the findings from limited observed events in the past few decades. We use the composites of SST distribution and evolution under the typical EP El Niño and CP El Niño as well as the normal condition for the boundary conditions to drive the Max Plank Institute global climate model （ECHAM5） in this study. And the results are also compared with composite of EP El Niño and CP El Niño events sampled from the century long AMIP-type simulation from ECHAM5.