Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 6107-6115 |
| Number of pages | 9 |
| Journal | Atmospheric Environment |
| Volume | 45 |
| Issue number | 34 |
| DOIs | |
| State | Published - Nov 2011 |
Bibliographical note
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 .
Keywords
- Air pollutant emissions
- Carbonaceous aerosols
- Direct aerosol radiative forcing
- Elements
- Ions
- Size segregated aerosols