Characteristics of Asian Dust Transport Based on Synoptic Meteorological Analysis over Korea

Classification of synoptic patterns and their correlation with dust events over East Asia were performed by means of cluster analysis. The average linkage and K-means clustering techniques were used to identify two major weather types during Asian dust events (ADEs; total 26 ADEs with 47 dusty days) of six spring seasons from 1996 to 2001. The first weather type mainly influenced neighboring Asian countries and frequently occurred with ADEs (∼23% of ADE cases). It mostly occurred under a surface high (low)-pressure system over the west (east) of the Korean peninsula coupled with an upper-level trough and cutoff low passage over the center of the Korean peninsula. It showed strong advection in the middle/upper troposphere with both a high aerosol index and enhanced coarse particulate matter (PM) loading over Korea. In contrast, the second weather type was mostly associated with long distance or continental-scale transport and occurred less frequently with ADEs (∼15%). It appeared with an upper-level trough and a cutoff low vertically connected with a surface low system that was formed by a strong cyclonic vortex over the north of the Korean peninsula. There were weak advection, low aerosol index, and low coarse PM concentration over the Korean peninsula during the second weather type. In addition, it was found to be mostly associated with the trans-Pacific transport of Asian dust to the western coast of North America.

[1]  Laurence S. Kalkstein,et al.  Development of an automated spatial synoptic climatological classification , 1990 .

[2]  P. Bhartia,et al.  Derivation of aerosol properties from satellite measurements of backscattered ultraviolet radiation , 1998 .

[3]  Qing Yang,et al.  Modeling the effects of meteorology on ozone in Houston using cluster analysis and generalized additive models , 1998 .

[4]  Teruyuki Nakajima,et al.  Aerosol Optical Characteristics in the Yellow Sand Events Observed in May, 1982 at Nagasaki-Part II Models , 1989 .

[5]  David E. Stooksbury,et al.  Cluster analysis of Southeastern U.S. climate stations , 1991 .

[6]  G. Grell,et al.  A description of the fifth-generation Penn State/NCAR Mesoscale Model (MM5) , 1994 .

[7]  R. Duce,et al.  Relationships between the dust concentrations over eastern Asia and the remote North Pacific , 1992 .

[8]  Meehye Lee,et al.  Characteristic number size distribution of aerosol during Asian dust period in Korea , 2001 .

[9]  M. Shiobara,et al.  Aerosol Optical Characteristics in the Yellow Sand Events Observed in May , 1982 at Nagasaki-Part I Observations , 2007 .

[10]  Yun-Jong Kim,et al.  The stratosphere–troposphere exchange of ozone and aerosols over Korea , 2002 .

[11]  J. Dudhia.  A Nonhydrostatic Version of the Penn State–NCAR Mesoscale Model: Validation Tests and Simulation of an Atlantic Cyclone and Cold Front , 1993 .

[12]  Howard B. Bluestein,et al.  Observations and theory of weather systems , 1993 .

[13]  Gregory R. Carmichael,et al.  Long‐range transport of SO x and dust in East Asia during the PEM B Experiment , 1997 .

[14]  H. Bluestein.  Synoptic-dynamic meteorology in midlatitudes. Vol. II. , 1993 .

[15]  W. Randel,et al.  Transport of Passive Tracers in Baroclinic Wave Life Cycles , 1999 .

[16]  Itsushi Uno,et al.  Tropospheric ozone production and transport in the springtime in east Asia , 1998 .

[17]  Zifa Wang,et al.  A deflation module for use in modeling long‐range transport of yellow sand over East Asia , 2000 .

[18]  Robert Frouin,et al.  Asian Dust Events of April 1998 , 2001 .

[19]  Meehye Lee,et al.  Synopsis, transport, and physical characteristics of Asian dust in Korea , 2001 .

[20]  N. Murayama.  Dust clouds "Kosa" from the east Asian dust storms in 1982-1988 as observed by the GMS satellite , 1988 .