The Characteristics Asian Dust Observed in Japan Deflecting the Korean Peninsula (2010. 5. 22.-5. 25.)

Abstract

Asian dust was observed a total of 66 times in the springtime during the period from 2002 to 2010, with 26 cases in March, 23 cases in April and 17 cases in May. This study investigates a Asian dust episode that occurred during the period from 22 to 25 May 2010, based on synoptic weather patterns, wind vector at 850 hPa, relative humidity at 1000 hPa, Jet streams and wind vector at 300 hPa, PM10 concentration in Korea and satellite imagery. In this case, Asian dust originated on 22 May along the rear of a developing low pressure system in Mongolia. The Asian dust was then transported southeastward and bypassed the Korea peninsula from 23 to 24 May, before reaching Japan on 25 May. Jet streams on 24 May bypassed the Korean peninsula and induced the development of a surface low pressure centered over the peninsula. The resulting air flow was critical to the trajectory of the Asian dust, which likewise bypassed the Korean peninsula. 72-hour backward trajectory data reveal that the Shandong Peninsula and the East China Sea were the points of origin for the air flows that swept through the Japanese sites where Asian dust was observable to the naked eay. The Asian dust pathway is ascertained by horizontal distribution of the Asian dust of RGB imagery from MODIS satellites which captured the Asian dust moving over the Shandong Peninsula, the East China Sea, and northwest of the Kyushu region in Japan. Since the synoptic pattern and the transport way of the Asian dust case are far from typical ones, which Asian dust forecasting technique has long been based on, this study can be good example of exceptional Asian dust pattern and it will be used for more accurate Asian dust forecasting.

Analysis of Sensitivity to Prediction of Particulate Matters and Related Meteorological Fields Using the WRF-Chem Model during Asian Dust Episode Days

“…광물성 먼지의 발생원은 주로 북 아프리카의 사하라 사막과 중국 및 몽골의 고비 사 막 등에서 편서풍 파동의 이동에 따른 고·저기압 발 달과 밀접한 관계가 있음이 밝혀졌다 (Sun et al, 2001;Kurosaki and Mikami, 2003;Hayasaki et al, 2006;Kim and Chung, 2009;Son and Kim, 2009;Teppei and Yamazaki, 2009;Ahn and Chun, 2011;Moon et al, 2011;Huang et al, 2013). 황사 수치모의를 위한 최근까지의 연구는 광물성 먼지를 포함한 미세먼지 모델링이 기상과 상호작용 없이 기상입력 자료에 기반 한 오프라인(off-line) 상 태에서 황사의 발생량, 수송, 침적, 영향, 복사강제력 등을 예측하여 왔다 (Tegen and Fung, 1994;Wang et al, 2000;Ginoux et al, 2001;In and Park, 2002;Gong et al, 2003;Shaw, 2004;Moon et al, 2011).…”