Variations of OC and EC concentrations in PM10, PM2.5 and PM1.0 in Jeju
Abstract
PM10, PM2.5 and PM1.0 were measured at Gosan-super site in Jeju Island during from August 2007 to June 2008. Mean concentrations of PM10, PM2.5 and PM1.0 were 29.28 μg/m3, 17.83 μg/m3 and 14.30 μg/m3, respectively. PM2.5/ PM10 was 60.9% and PM1.0/ PM10 was 48.8% with 80.2% of PM1.0/ PM2.5. While nitrate showed different size-distribution in PM1.0-10 and PM1.0 with higher concentration in PM1.0-10, sulfate was subsequently dominant in PM1.0. When high concentration episodes were occurred, nitrate was accompanied by mass in PM1.0-10, however both mass and nitrate and sulfate increased in PM1.0, especially nitrate. Nitrate and sulfate showed larger increase with northwest wind, while relatively higher sulfate appeared with southeast wind, too. PM2.5/ PM10 was 84.8(99.7)% for OC(EC), PM1.0 / PM10 was 67.8(84.2)% and PM1.0 / PM2.5 was 80.0(42.6)%. OC and EC were much higher in PM1.0 and EC in PM1.0-2.5 was distinguishable. High concentration episodes considered, nitrate and sulfate were higher during episodes periods of EC than that of OC, because it’s likely that EC was emitted from anthropogenic source and had a large surface area. Most of all, nitrate increase during episodes periods of EC and OC was marked feature, which was 2 times larger than mean concentrations. The further work about high concentration episodes of OC and EC will be presented in the meeting.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2009
- Bibcode:
- 2009AGUFM.A21A0079L
- Keywords:
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- 0305 ATMOSPHERIC COMPOSITION AND STRUCTURE / Aerosols and particles;
- 0330 ATMOSPHERIC COMPOSITION AND STRUCTURE / Geochemical cycles;
- 0335 ATMOSPHERIC COMPOSITION AND STRUCTURE / Ion chemistry of the atmosphere;
- 0345 ATMOSPHERIC COMPOSITION AND STRUCTURE / Pollution: urban and regional