JpGU-AGU Joint Meeting 2017

講演情報

[EE]Eveningポスター発表

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) 17:15 〜 18:30 ポスター会場 (国際展示場 7ホール)

[AAS07-P08] Potential impacts of climate variability on transpacific transport of springtime Asian aerosols

*Yun Gon Lee1Kyu-Myong Kim2 (1.Department of Atmospheric Sciences, Chungnam National University、2.Climate and Radiation Laboratory, NASA GSFC, Greenbelt, MD, USA)

キーワード:Asian aerosol, transpacific transport, MODIS AOD, western Pacific pattern, Pacific-North American pattern

The potential impacts of large-scale circulation associated with western Pacific (WP) and Pacific-North American (PNA) patterns on transpacific transport of springtime Asian aerosols are examined using aerosol optical depth (AOD) from the Moderate-resolution Imaging Spectroradiometer (MODIS) and reanalysis data. Composite analyses reveal that the increased westerly winds are evidently observed to the north and south of the North Pacific, respectively, during WP positive (WP+) and PNA positive (PNA+) phases. Along the favorable pathways during WP+, the large amount of aerosols are more efficiently transported over the north of 40°N, producing the increased transport probability by about 36% compared to the opposite phase (WP–). Similarly, the distinct route over the south of 40°N during PNA+ associated with more frequent high aerosol loading days as compare to PNA–. Concurrent with these reinforcements during WP+ and PNA+, the long-range transports of aerosols emitted from northeastern and southeastern Asia can be effectively controlled by respective patterns.