Winter monsoon variability and its impact on aerosol concentrations in East Asia

Rokjin Park; Jaein Jeong

講演情報

[EE] 口頭発表

セッション記号 A (大気水圏科学) » A-AS 大気科学・気象学・大気環境

[A-AS07] [EE] Aerosol impacts on air quality and climate

2017年5月22日(月) 09:00 〜 10:30 101 (国際会議場 1F)

コンビーナ:Kyu-Myong Kim(NASA Goddard Space Flight Center)、安成哲平(北海道大学　大学院工学研究院)、Mian Chin(NASA Goddard Space Flight Center)、竹村俊彦(九州大学応用力学研究所)、座長:Kim Kyu-Myong(NASA/Goddard Space Flight Center)、座長:竹村俊彦(九州大学応用力学研究所)、座長:安成哲平(北海道大学　大学院工学研究院)、座長:Chin Mian(NASA/Goddard Space Flight Center)

09:45 〜 10:00

[AAS07-04] Winter monsoon variability and its impact on aerosol concentrations in East Asia

*Rokjin Park¹、Jaein Jeong¹ (1.Seoul National University)

キーワード：Aerosol, Winter monsoon, East Asia

Monsoons play a key role in synoptic weather patterns, which affect the frequency and longevity of pollution events. In East Asia, particulate matter (PM) pollution is particularly severe in winter. In this study, we investigate the relationship between winter aerosol concentrations and the East Asian Winter Monsoon (EAWM) variability using a global 3-D chemical transport model (GEOS-Chem) and ground PM observations. A strong relationship between aerosol concentrations and the intensity of the EAWM is found, but shows a different sign for northern and southern East Asia. Compared to the climatological mean aerosol concentrations in winter, changes driven by the EAWM variability are up to 25% in East Asia in the model. The EAWM variability is found to play a major role in interannual variations in aerosol concentrations; consequently, changes in the EAWM will be important for understanding future changes in wintertime PM air quality in East Asia.