AAAR 34th Annual Conference
October 12 - October 16, 2015
Hyatt Regency
Minneapolis, Minnesota, USA
Abstract View
A Study on Nanoparticle Formation Events at Urban and Coastal Sites in Korea
KWANGYUL LEE, Hoseong Chae, Hee-joo Cho, Ji Yeon Park, Peter H. McMurry, Kihong Park, Gwangju Institute of Science and Technology, Gwangju, Korea
Abstract Number: 385 Working Group: Nanoparticles and Materials Synthesis
Abstract Nanoparticle formation (NPF) events in the ambient atmosphere have been reported at many places in the world. The freshly formed nanoparticles can grow into the optically important size range affecting radiation balance and cloud formation. In this study, the NPF events and particle growth were examined at urban (Gwangju) and coastal (Boseong) sites in Korea. Continuous measurements of particle size distributions in a wide size range were made with the diethylene glycol-scanning mobility particle sizer spectrometer (DEG-SMPS) (1-12 nm), Nano-SMPS (3-80 nm) (DMA 3080. CPC 3776), NanoScan-SMPS (10-420 nm) (TSI 3910), SMPS (20-600 nm) (DMA 3080, CPC 3022), and/or optical particle sizer (OPS) (0.3-25 um) (Grimm, 1.107). Also, black carbon (BC) concentration and chemical components of non-refractory submicrometer particles were occasionally measured with the aethalometer (AE-51) and aerosol mass spectrometer (Aerodyne Inc, USA), respectively. Several NPF events with subsequent growth were observed. The intensity of the NPF and the growth rate of the nanoparticles were much higher in urban site than coastal site. Also, the intensity of NPF event was much stronger in summer than winter at the urban site. More thorough analysis will be conducted, and their results will be presented.