贵阳市及其郊区土壤大气界面间汞交换通量的初步研究  

MERCURY FLUX AT AIR/SOIL INTERFACE IN GUIYANG AND ITS SUBURBS

作　　者：侯亚敏[1] 冯新斌[1] 王少锋[1] 仇广乐[1] 

机构地区：[1]中国科学院地球化学研究所环境地球化学国家重点实验室

出　　处：《土壤学报》2005年第1期52-58,共7页Acta Pedologica Sinica

基　　金：中国科学院海外杰出人才计划;国家自然科学基金项目(40173037)

摘　　要：利用动力学通量箱与高时间分辨率测汞仪联用技术对贵阳市市区及其郊区4个点的土壤大气界面间的汞交换通量进行了测定,用小型多功能气象仪记录了采样期间的气象参数。结果显示:4个采样点的大气汞含量都明显高于全球背景值(1.5~2.0 ng m-3),显示出贵阳市市区及郊区都遭受了不同程度的大气汞污染。土壤大气界面间的汞交换通量与光照强度具有显著的相关关系,与土壤温度也有很好的相关性。Mercury flux at the air-and-soil interface in Guiyang and its suburbs was measured with the dynamic flux chamber method. At the same time, meteorological parameters such as air temperature, soil temperature, humidity, solar radiation, wind direction and wind speed were recorded with a multi-function mini-weather station. The results at these four sites, show that concentrations of mercury in the air were significantly elevated over the global background values (1.5～2.0 ng m^(-3)), which indicates that the air of Guiyang and its suburbs was polluted to a varying extent due to anthropogenic atmospheric mercury emissions. The results also illustrate that Hg flux was significantly correlated with both solar radiation and soil temperature.

关 键 词：土壤温度 大气界面 光照强度 交换通量 测汞仪 利用 背景值 汞污染 汞含量 采样 

分 类 号：S153.1[农业科学—土壤学] X142[农业科学—农业基础科学]