摘要
利用高时间分辨率自动大气测汞仪（Tekran 2537A）,于2005-08～2006-07对长白山地区大气气态总汞进行了连续1a的野外观测.结果表明,长白山地区气态总汞的年平均含量为（3.22±1.78）ng·m^-3,按季节表现为：冬季〉春季〉秋季〉夏季.长白山地区气态总汞含量高于北半球大气汞含量的背景值（1.5～2.0 ng·m^-3）,表明该地区已受到一定程度的大气汞污染.在对长白山地区气态总汞来源的解析中,该区频率最高的指示风向西南（SW）、西北（NW）和非主导风向东北（NE）方位上,城镇人为采暖、燃煤以及对生物燃料的使用成为该地区的气态总汞的主要来源,而土壤释放或其他来源的大气汞经中长距离的迁移也是造成该区域大气汞含量升高的原因.
An intensive field campaign monitoring was conducted from August 2005 to July 2006 using the automatic atmospheric mercury analyzers for one year＇s measurement of total gaseous mercury （TGM） in Changbai Mountain area. Results show the mean concentration of TGM is （3.22 ± 1.78） ng· m^-3 and it presents seasonal variation as followings： winter 〉 spring 〉 autumn 〉 summer. Given the background concentration of atmospheric mercury in the Northern Hemisphere, mercury concentrations are totally elevated in Changbai Mountain area. The regional source of mercury in the atmosphere seems to be anthropogenic Hg emissions mainly due to local biofuel use and coal combustion from industry and domestic uses. The potential mercury source may be regional mercury emissions from soil and the long distance transportation of mercury in the atmosphere.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2008年第2期296-299,共4页
Environmental Science
基金
中国科学院重要方向项目(KZCX3-SW-443)
国家自然科学基金重点项目(405320514)
关键词
长白山
气态总汞
季节变化
来源
Changbai Mountain
total gaseous mercury
seasonal variation
source
