Aerodynamic Particle Sizer (APS)를 이용한 고농도 PM10 사례 중 황사 판별기법 개발
Developing a Method for Detecting the Asian dust event Among High PM10 events Using Aerodynamic Particle Sizer (APS)
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초록
Log normalized volume size distribution (dV/dlogDp) with 52 size ranges from 0.5 to 20.0 μm was measured for the cases of high PM10 mass concentration (> 200 μg m-³) using the Aerodynamic Particle Sizer (APS) at the Korea Global Atmosphere Watch Center (KGAWC) from 6 April, 2006 to 5 April, 2007. Black Carbon (BC), gaseous pollutants of NOX and SO₂, and Ångstrom exponent were also measured to examine the properties of the volume size distribution. From distinct difference of the high volume concentration (> 100 μm³ cm-³), the volume size distribution for each event day was classified into four types: (1) Type 1 had the high volume concentration for supermicron particles from 2.3 to 6.0 μm and maximum average volume concentration was 160.7 μm³ cm-³ at 3.5 μm. (2) Type 2 represented the high volume concentration in the both size range of submicron (0.7–1.0 μm) and supermicron particles (2.1–4.1 μm) and similar maxima of 126.1 μm³ cm-³ and 136.2 μm³ cm-³ were found at 0.8 and 3.3 μm respectively. (3) Type 3 showed the high volume concentration in the size range of 0.5–3.5 μm and highest volume concentration of 201.1 μm³ cm-³ at the particle size bin of 0.8 μm. (4) Type 4 was characterized by the high volume concentration for the fine particles less than 1.2 μm and very high concentration of 446.8 μm³ cm-³. Ångstrom exponent, concentration of gaseous (NOX and SO2), and particle (BC) pollutants suggested that Type 1 was a typical volume size distribution for the Asian dust and Type 3 provided transportation of air pollutants. The distribution in Type 2 found to have both characteristics of the Asian dust and air pollutants, and Type 4 was took place during the foggy atmosphere containing high density of local pollutants. Based on the properties of volume size distribution, we can identify the three major events contributing the increase of PM10 mass concentration, and hope to provide a guideline for discriminating the Asian dust from high PM10 events. More case studies and longer measurements provide a data set to advance this determination method.
Abstract
Log normalized volume size distribution (dV/dlogDp) with 52 size ranges from 0.5 to 20.0 μm was measured for the cases of high PM10 mass concentration (> 200 μg m-³) using the Aerodynamic Particle Sizer (APS) at the Korea Global Atmosphere Watch Center (KGAWC) from 6 April, 2006 to 5 April, 2007. Black Carbon (BC), gaseous pollutants of NOX and SO₂, and Ångstrom exponent were also measured to examine the properties of the volume size distribution. From distinct difference of the high volume concentration (> 100 μm³ cm-³), the volume size distribution for each event day was classified into four types: (1) Type 1 had the high volume concentration for supermicron particles from 2.3 to 6.0 μm and maximum average volume concentration was 160.7 μm³ cm-³ at 3.5 μm. (2) Type 2 represented the high volume concentration in the both size range of submicron (0.7–1.0 μm) and supermicron particles (2.1–4.1 μm) and similar maxima of 126.1 μm³ cm-³ and 136.2 μm³ cm-³ were found at 0.8 and 3.3 μm respectively. (3) Type 3 showed the high volume concentration in the size range of 0.5–3.5 μm and highest volume concentration of 201.1 μm³ cm-³ at the particle size bin of 0.8 μm. (4) Type 4 was characterized by the high volume concentration for the fine particles less than 1.2 μm and very high concentration of 446.8 μm³ cm-³. Ångstrom exponent, concentration of gaseous (NOX and SO2), and particle (BC) pollutants suggested that Type 1 was a typical volume size distribution for the Asian dust and Type 3 provided transportation of air pollutants. The distribution in Type 2 found to have both characteristics of the Asian dust and air pollutants, and Type 4 was took place during the foggy atmosphere containing high density of local pollutants. Based on the properties of volume size distribution, we can identify the three major events contributing the increase of PM10 mass concentration, and hope to provide a guideline for discriminating the Asian dust from high PM10 events. More case studies and longer measurements provide a data set to advance this determination method.
참고문헌 (17)
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