AAAR 32nd Annual Conference
September 30 - October 4, 2013
Oregon Convention Center
Portland, Oregon, USA
Abstract View
A Long Term Variation of Chemical Species in PM$_(2.5) and PM$_(10) in the Ambient Atmosphere at Background Site in Jeju, Korea during 2008–2012
KWANGYUL LEE, Tsatsral Batmunkh, Young Joon Kim, Kihong Park, Gwangju Institute of Science and Technology (GIST), Korea
Abstract Number: 670 Working Group: Remote and Regional Atmospheric Aerosols
Abstract Concentrations of elemental carbon (EC), organic carbon (OC), ions (sulfate, nitrate, and ammonium), and elements in PM$_(2.5) and PM$_(10) were measured at Gosan during spring in 2008, fall in 2008, spring in 2009, fall in 2009, spring 2011, fall in 2011, and spring in 2012 to investigate a long term variation of chemical characteristics of atmospheric aerosols. The highest PM$_(10) and PM$_(2.5) concentration were observed as high as 161.08 and 56.89 micro-gram per cubic meter, respectively due to the Asian dust during the spring in 2011, while the lowest PM concentrations were observed as low as 9.41 and 14.86 micro-gram per cubic meter in PM$_(2.5) and PM$_(10), respectively during the fall in 2011. On May 21 and 22 in 2008, OC concentration increased 4.4 times (6.59 micro-gram carbon per cubic meter) higher than other days due to the biomass burning emissions from China. From October 17 to 20 in 2009, Na+ and Cl- increased 2.3 times and 1.7 times in PM$_(2.5) and 3.7 times and 2.5 times in PM$_(10), respectively when the air masses originated from the Sea. After the Asian dust events (May 12 and 13 in 2011), OC and sulfate increased till 6.50 micro-gram carbon per cubic meter and 10.13 micro-gram per cubic meter, respectively, while PM concentration decreased on May 14 and 15 in 2011. Sulfate increased to 13.24 micro-gram per cubic meter (31.5% of PM2.5) and 15.31 micro-gram per cubic meter (28.8% of PM10) in PM$_(2.5) and PM$_(10), respectively on April 22 and 23 during the spring intensive measurement in 2012. The frequency of the long-range transport (LTP) event or Asian dust (AD) event typically occurred in spring and fall were not significantly different from years to years. More detailed analysis is in progress, and will be presented.