Impact of Chinese anthropogenic emissions on submicrometer aerosol concentration at Mt. Tateyama, Japan
Impact of Chinese anthropogenic emissions on submicrometer aerosol concentration at Mt. Tateyama, Japan
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DOI：
10.5194/acp-9-9111-2009
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发表时间：
2009-12
影响因子：
6.3
通讯作者：
K. Osada;T. Ohara;I. Uno;M. Kido;H. Iida
中科院分区：
文献类型：
--
作者：
K. Osada;T. Ohara;I. Uno;M. Kido;H. Iida
抽象的。在二氧化硫等气态污染物转化后，亚洲经济的快速发展可能会对西太平洋上空的大气气溶胶颗粒产生二次影响。为了阐明正在经历显著工业化的背风区气溶胶浓度的变化，在Murododaira(36.6°N，137.6°E，2450ma.s.l)测量了亚微米(0.31.0μm)气溶胶的数量-尺寸分布。图为1999年1月至2009年2月在日本中部的塔特山西侧。从2400到0500的夜间数据被用于分析自由对流层气溶胶浓度。月平均成交量浓度按月计算，每日数据覆盖率为50%。亚微米气溶胶的体积浓度在春季至初夏较高，冬季较低。在95%的置信度水平下，冬春季的体积浓度有显著的增加趋势。模拟的月人为气溶胶浓度在山上。Tateyama根据截至2005年排放清单的区域气溶胶模拟结果显示，季节变化和冬春季增加趋势与观测到的气溶胶浓度相似。模式分析表明，中国的人为气溶胶浓度在冬春季的贡献率较高(占总人为气溶胶的60%~80%)。Tateyama)。这与观察到的冬春季的增加趋势是一致的。由于SO42-−是人为气溶胶总量的主要组成部分，这些结果表明，在冬春期间，中国地区人为排放的增加，特别是SO2排放量的增加，导致了日本上空亚微米直径气溶胶的增强。
Abstract. Rapid Asian economic development might engender secondary impacts of atmospheric aerosol particles over the western Pacific after conversion of gaseous pollutants such as SO2. To elucidate changes in aerosol concentrations in leeward areas undergoing remarkable industrialization, the number-size distributions of submicrometer (0.3–1.0 μm) aerosols were measured at Murododaira (36.6° N, 137.6° E, 2450 m a.s.l.) on the western flank of Mount Tateyama in central Japan during January 1999–February 2009. Nighttime data obtained from 2400 to 0500 were used to analyze free-tropospheric aerosol concentration. Monthly average volume concentrations were calculated for months with >50% daily data coverage. Volume concentrations of submicrometer aerosols were high in spring to early summer and low in winter. Significant increasing trends at 95% confidence levels were found for volume concentrations in winter–spring. Simulated monthly anthropogenic aerosol concentrations at Mt. Tateyama from results of regional aerosol modeling with emission inventory up to 2005 showed seasonal variation and winter–spring increasing trends similar to those of observed aerosol concentration. According to the model analyses, the contribution of anthropogenic aerosol concentrations derived from China was high during winter–spring (60–80% of total anthropogenic aerosols at Mt. Tateyama). This accords with the increasing trend observed for winter–spring. Because SO42− is the dominant component of total anthropogenic aerosols, these results suggest that increasing anthropogenic emissions, especially for SO2, in China, engender enhancement of submicrometer-diameter aerosols over Japan during winter–spring.