期刊
ATMOSPHERIC ENVIRONMENT
卷 40, 期 14, 页码 2478-2487出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.atmosenv.2005.12.029
关键词
Japan; Tokyo; trends; particulate matter; chemical composition; elemental carbon
Long-term measurements of suspended particulate matter (SPM, < 7 mu m), PMfine (< 2.1 mu m), and PMcoarse (2.1-7 mu m) were obtained from a traffic-dominated site in Tokyo, Japan for the period 1994-2004 to evaluate the effects of emission reduction measures for motor-vehicle emissions. SPM decreased from 1996 forward, with all of the downward trend attributable to the PMfine fraction. Annual average PMcoarse was constant over the 10-yr period. From 1996 to 2004, PMfine decreased at a rate of 2.37 mu g m(-3) yr(-1) for PM2.1 mass. Most of this decrease was attributable to decreases in organic and elemental carbon. This decrease is consistent with fleet penetration of engines and fuels that complied with a stringent Japanese emission reduction limit which began to take effect in 1994. Sulfate and nitrate concentrations did not decrease over this period. Evidence of Asian dust storm contributions was found in elevated PMcoarse and water-soluble calcium levels during the spring. (c) 2006 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据