【摘要】 2008年5月27～29日源自内蒙古南部的沙尘暴于5月30日到达厦门.受其影响,30日晚厦门风速最高达到12.6 m/s;31日本监测站大气中CO、NO2和NO含量明显下降,分别从551.3μg/m3下降至218.9μg/m3,从25.0μg/m3下降至6.7μg/m3,从8.1μg/m3下降至0.1μg/m3;6月1日其分别回升至682.4、28.7、6.5μg/m3.与CO、NO2和NO不同,PM10和SO2含量在5月31日没有明显变化,PM10含量从5月31日晚的10.1μg/m3上升至6月1日的232.6μg/m3,SO2含量从5月底的25.0μg/m3上升至52.0μg/m3,并且两者的变化显示出较好的相关性(R2=0.65).据此认为本次沙尘暴到达厦门时,在引起PM10含量增加的同时还引起了SO2含量的升高.这是沙尘暴引起中国南方城市SO2含量升高的首次报道.尽管目前SO2在中国的分布和传输已有较多研究,但对于沙尘暴在中国南方城市传输SO2的机制仍需进一步的探讨.更多还原

【Abstract】 Dust storms have significant effects on the air quality of cities they pass through.Most studies of dust storms in China have focused on their impact on cities in the north.However,it is generally believed that dust storms can influence cities as far south as Nanjing and Wuhan,and that the concentrations of pollutants such as SO2,NO2 and O3 will decrease due to the gale brought by dust storms,while the level of particles will increase.Nevertheless,studies focusing on the impact of dust storms on southern cities such as Zhuhai and Xiamen have been quite limited.A severe dust storm originated from Inner Mongolia during 27～29 May,2008 and reached Xiamen on 30,May.As measured by sampling site-H the wind speed increased to 12.6 m/s,and the concentration of CO,NO2 and NO decreased rapidly on 31,May,but returned to normal on 1,June.Conversely,no variations in PM10 and SO2 were observed on 31,May,but an increase was observed on 1 and 2,June.The concentrations of PM10 and SO2 exhibited a good correlation during the two days(R2=0.65),suggesting that the dust storm not only caused an increase in PM10,but also in SO2.This is the first reported case of a dust storm induced SO2 increase in cities in south China.Although many studies have been conducted to evaluate the distribution and transportation of SO2,additional studies to evaluate the mechanism of the transportation of SO2 by dust storms are needed.更多还原