模拟东亚夏季风对中国东部地区大气中α-六六六(α-HCH)时空分布的影响

模拟东亚夏季风对中国东部地区大气中α-六六六(α-HCH)时空分布的影响

摘要： 以中国为研究区域,利用CanMETOP模型模拟了2005年大气中α-六六六(α-HCH)浓度的变化,并分析了东亚夏季风对我国东部地区大气中α-HCH浓度时空分布的影响.模拟结果表明,6月15日-8月15日期间,东北、华北和东南地区的α-HCH平均大气浓度分别为260 pg·m~(-3),74 pg·m~(-3)和41 pg·m~(-3).大气浓度具有明显的时空分布特征,从6月15日在我国东南地区开始出现了较高的大气浓度堆集,6月24日达到最大值(259 pg·m~(-3)).在向我国北部传输过程中,7月1日在东北形成的气旋区域出现最大值(1947pg·m~(-3)).此后,东南地区的.大气浓度均处于较低的水平(<50 pg·m~(-3)),而东北地区的大气浓度一直处于100-350 pg·m~(-3)之间的较高水平.分析结果表明,东亚夏季风可以将东南地区大气中的α-HCH传输至东北地区,并在东北区域堆集. Abstract： Air concentration of α-HCH was simulated by using CanMETOP model in regional scale in 2005. The temporal and spatial patterns of α-HCH atmospheric concentrations in eastern region of China caused by East Asian Summer Monsoon was analyzed. The simulated results showed that the mean air concentrations of the pesticide in northeast, mid-east and southeast were 260 pg · m~(-3), 74 pg · m~(-3) and 41 pg · m~(-3) from June 15 to August 15, respectively. The concentration appeared to accumulate in southeastern region since June 15, and reached the largest value in the region

on June 24 (259 pg · m~(-3)) . When α-HCH was transported from southeastern to northeastern region, the highest air concentration in northeast region occurred on July 1 (1947 pg. m~(-3)). Hereafter, while air concentrations of α-HCH in southeastern region were lower than 50 pg·m~(-3), those in northeastern region were still at a higher level, ranged from 100 to 350 pg · m~(-3). It was suggested that East Asian summer monsoon can carry α-HCH from the southeast of China to the northeast of China by atmospheric transport, and accumulate the insecticide in the air of the latter. 作 者： 田崇国 马万里 徐殿斗 马建民 李一凡 TIAN Chong-guo MA Wan-li XU Dian-dou MA Jian-min LI Yi-fan 作者单位： 田崇国,马万里,TIAN Chong-guo,MA Wan-li(哈尔滨工业大学市政环境工程学院,城市水资源与水环境国家重点实验室国际持久性有毒物质联合研究中心,哈尔滨,150090)

徐殿斗,XU Dian-dou(中国科学院高能物理研究所核分析技术重点实验室国际持久性有毒物质联合研究中心,北京,100049)

马建民,MA Jian-min(加拿大环境部科学技术局,名伦名,M3H5T4)

李一凡,LI Yi-fan(哈尔滨工业大学市政环境工程学院,城市水资源与水环境国家重点实验室国际持久性有毒物质联合研究中心,哈尔滨,150090;加拿大环境部科学技术局,名伦名,M3H5T4)

期 刊： 环境化学 ISTICPKU Journal： ENVIRONMENTAL CHEMISTRY 年，卷(期)： 2009,28(6) 分类号： X13 关键词： α-HCH 东亚夏季风 大气传输 气旋. Keywords： α-HCH east Asian summer monsoon air transport cyclone.