Characteristic of organic aerosol in a remote area of Okinawa Island

作     者：LUN Xiaoxiu TAKAMI Akinori MIYOSHI Takao HATAKEYAMA Shiro 

作者机构：Beijing Forestry University Beijing 100083 China National Institute for Environmental Studies Tsukuba 305-8506 Japan Tokyo University of Agriculture and Technology Tokyo 183-8538 Japan 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2009年第21卷第10期

页      面：1371-1377页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 07[理学] 08[工学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：supported by the Western Pacific Air-Sea Interaction Study (No W-PASS, 2006-2010) the National Natural Science Foundation of China (No 40505027) the Beijing Natural Science Foundation (No 8093035) 

主　　题：long-range transport Okinawa organics loss rate 

摘      要：A continuous investigation of aerosol pollutants in Cape Hedo, Japan was conducted from October 2005 to August 2006 by Aerodyne aerosol mass spectrometer （AMS）. This article focused on the analysis of long-range transport of organic aerosol from continental origin to the remote island. Based on the transport distance and air mass origin, four main air mass origins were considered, including North China, South China, Japan and Korea. Although the mass concentration and air mass origin were quite different during study period, the mass spectrum and size distribution of organic matter and oxidized organics were similar, which showed uni-modal distribution with modal diameter of around 500 nm. The loss rate of organics was （5.15 ± 0.55） × 10^-6 s^-1 obtained by plotting the concentration against the transport time. Conversion rate of SO2 to sulfate and oxidation rate of organics were （1.07 ± 0.15） × 10^-5 and （1.09 ± 0.52） × 10^-6 s^-1, respectively.