Numerical Simulation of the Springtime Trans-Boundary Air Pollution in East Asia
Numerical Simulation of the Springtime Trans-Boundary Air Pollution in East Asia
复制标题
东亚春季跨界空气污染的数值模拟
DOI：
10.1023/a:1013892008830
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
K. Murano
中科院分区：
文献类型：
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作者：
T. Ohara;I. Uno;S. Wakamatsu;K. Murano
在春季，日本上空经常观察到高浓度的臭氧（O3）和气溶胶。据推测，这些事件是由来自东亚其他地区的跨境空气污染造成的。为了证实这一假设，本文利用区域气象模式和化学输送模式对1993年4月东亚地区的一次暴雨过程进行了数值模拟;该模型可以再现臭氧和硫酸盐（SO 42 −）气溶胶浓度的一些关键特征，具体而言，在位于日本的几个偏远地点测量的臭氧浓度的时间变化和在大坂观测到的硫酸盐气溶胶浓度的日常变化和垂直廓线。模型模拟结果表明：（1）在天气气象条件下，硫酸盐气溶胶、硝酸盐（NO3−）气溶胶、臭氧等大气污染物从亚洲大陆向日本列岛输送;（2）这些跨界污染物使日本城市空气污染加剧;（3）今后，亚洲发展中国家排放量的增加将对日本的空气质量产生重大影响。
During the spring, the high concentrations of ozone (O3) and aerosols are frequently observed aloft in Japan. Such episodes supposedly are caused by the trans-boundary air pollution from other parts of East Asia. To confirm this hypothesis, an episode during the month of April 1993 is investigated by numerical simulations for East Asia with a regional meteorological model and a chemical transport model; the model can reproduce some of the key features of ozone and sulfate (SO42−) aerosol concentration,s specifically, the time variations in ozone concentrations measured at several remote sites located in Japan and the day-to-day variations and vertical profiles for sulfate aerosol concentrations observed in Osaka. Model simulations show that (1) air pollutants such as sulfate aerosol, nitrate (NO3−) aerosol, and ozone are transported from the Asian continent to the Japanese Islands under synoptic meteorological conditions; (2) the trans-boundary pollutants increase urban air pollution in Japan; and (3) in the future, the air quality in Japan will be greatly impacted by increasing emissions in developing Asia.