Journal of Atmospheric Pollution
ISSN (Print): 2381-2982 ISSN (Online): 2381-2990 Website: http://www.sciepub.com/journal/jap Editor-in-chief: Ki-Hyun Kim
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Journal of Atmospheric Pollution. 2015, 3(1), 22-30
DOI: 10.12691/jap-3-1-5
Open AccessArticle

Aircraft Observation of Aerosol and Cloud-droplet Properties over the East China Sea Influenced by the Outflow of Asian Polluted Air

Deepak Aryal1, , Yutaka Ishizaka2 and Kikuo Okada3

1Central Department of Hydrology and Meteorology, Tribhuvan University, Kirtipur, Kathmandu, Nepal

2Division of General education, Aichi Gakuin University, 12 Araike, Iwasaki-cho, Nisshin 470-0195, Japan

3Meteorological Research Institute, 1-1 Nagamine, Tsukuba, Ibaraki 305-0052, Japan

Pub. Date: December 24, 2015

Cite this paper:
Deepak Aryal, Yutaka Ishizaka and Kikuo Okada. Aircraft Observation of Aerosol and Cloud-droplet Properties over the East China Sea Influenced by the Outflow of Asian Polluted Air. Journal of Atmospheric Pollution. 2015; 3(1):22-30. doi: 10.12691/jap-3-1-5

Abstract

Airborne measurements of aerosol particles and cloud microstructures were made over the ocean around the south of Kyushu Islands of Japan during the Asian Atmospheric Particulate Environmental Change Experiment 3/Asia Pacific Regional Aerosol Characterization Experiment (APEX-E3/ACE-Asia) during the period of 17 March to 13 April 2003. Results demonstrated that polluted air from the Asia continent could penetrate several hundreds of kilometers over the oceans and clouds forming in that air had significantly altered microphysical properties. Based on the number concentration of aerosol particles with diameters between 0.3 and 5 μm, two cases were investigated: 22 March 2003 was termed a "clean" case and 12 April 2003 as a "polluted" case. Single particle analysis of particles was also carried out by electron microscopy. The particles in the polluted marine boundary layer were characterized by the presence of sulfate particles with traces of potassium and heavy metals. The cloud droplets in the polluted marine boundary layer exhibited larger number concentrations than those in the clean boundary layer, along with the decrease in the droplet size. Present study demonstrated that polluted air from the Asia continent could penetrate several hundreds of kilometers over the oceans and clouds forming in that air had significantly altered microphysical properties.

Keywords:
East China Sea Size distribution Cloud droplet Biomass burning single particle analysis

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