TY - JOUR
T1 - Long-term trend of aerosol composition and direct radiative forcing due to aerosols over Gosan
T2 - TSP, PM10, and PM2.5 data between 1992 and 2008
AU - Kim, N. K.
AU - Kim, Y. P.
AU - Kang, C. H.
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2011-0016297 ) and the Korea Meteorological Administration Research and Development Program under Grant RACS_2010-3006 .
PY - 2011/11
Y1 - 2011/11
N2 - In this study, size segregated measurement data between 1992 and 2008 at Gosan, Jeju, Korea were analyzed. Long-term trend of aerosol composition changes related to the emission change was analyzed and direct radiative forcing due to aerosols over Gosan was calculated. The concentration variations of ion components and carbonaceous aerosols matched well to the emission changes in Northeast Asia, and the concentration variations of the elements with natural origin were highly correlated to the frequency of dust storms in the region. The net aerosol forcing varied from -4.48 W m-2 to 0.53 W m-2 at Gosan and it was increasing. This was mainly because of continuous decrease of sulfate concentration and steady increase of EC concentration in the region. It was found that for the determination of the direct aerosol radiative forcing, relative humidity (RH) was most critical during summer season when it was high (over 75%), and EC was most critical during spring and fall.
AB - In this study, size segregated measurement data between 1992 and 2008 at Gosan, Jeju, Korea were analyzed. Long-term trend of aerosol composition changes related to the emission change was analyzed and direct radiative forcing due to aerosols over Gosan was calculated. The concentration variations of ion components and carbonaceous aerosols matched well to the emission changes in Northeast Asia, and the concentration variations of the elements with natural origin were highly correlated to the frequency of dust storms in the region. The net aerosol forcing varied from -4.48 W m-2 to 0.53 W m-2 at Gosan and it was increasing. This was mainly because of continuous decrease of sulfate concentration and steady increase of EC concentration in the region. It was found that for the determination of the direct aerosol radiative forcing, relative humidity (RH) was most critical during summer season when it was high (over 75%), and EC was most critical during spring and fall.
KW - Air pollutant emissions
KW - Carbonaceous aerosols
KW - Direct aerosol radiative forcing
KW - Elements
KW - Ions
KW - Size segregated aerosols
UR - http://www.scopus.com/inward/record.url?scp=80052618774&partnerID=8YFLogxK
U2 - 10.1016/j.atmosenv.2011.08.051
DO - 10.1016/j.atmosenv.2011.08.051
M3 - Article
AN - SCOPUS:80052618774
SN - 1352-2310
VL - 45
SP - 6107
EP - 6115
JO - Atmospheric Environment
JF - Atmospheric Environment
IS - 34
ER -