夏季红枫湖地区农田土壤-大气界面汞交换通量的初步研究
Study of Mercury Exchange Rate between Air and Soil Surface in Summer Season at the Hongfeng Reservoir Region, Guizhou, China
查看参考文献27篇
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文摘
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采用动力学通量箱法(Dynamic Flux Chamber)与高时间分辨率大气测汞仪联用技术对贵州红枫湖地区土壤-大气界面间汞交换通量进行了初步研究.结果显示,红枫湖地区土壤-大气界面间汞交换通量变化范围为-8.6 ng～215.3 ng·m~(-2)·h~(-1),平均27.4士40.1 ng/m~2·h(n=255);且土壤与大气界面间的汞交换是双向的:既有土壤汞的释放,又有大气汞的沉降,主要以土壤汞的释放为主(n释放=253,n沉降=2n).土壤汞的释放通量与土壤温度、气温、光照强度有强相关关系,相关系数分别为0.80、0.83、0.74. |
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其他语种文摘
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In summer of 2002, the exchange flux of mercury between air and soil surface was measured using the method of Dynamic Flux Chamber (DFC) at the Hongfeng reservoir region. At the same time, the meteorological parameters, such as air temperature, soil temperature, wind speed and solar radiation were recorded using a multifunction mini-weather station (global water III). The soil, moss and fertilizer samples in study area were also collected. The mercury fluxes of air/soil surface were in the range from -8. 6 ng/m~2· h to 215. 3 ng/m~2·h, averaged at 27. 4 + 40. 1 ng/m~2·h(n=255). The data showed that the exchange of mercury was bi-directional between air and soil surface, i. e. both emission and deposition of mercury occurs, but mercury emission was much more fre-quent than deposition process (N_(deposition)= 2, n_(emission) = 253). Mercury emission fluxes significantly correlated with soil temperature,air temperature and intensity of solar radiation, and the correlation coefficients are 0. 80,0. 83, and 0. 74, respectively. |
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来源
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矿物岩石地球化学通报
,2004,23(1):19-23 【扩展库】
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关键词
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汞
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土壤-大气界面
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交换能量
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红枫湖
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地址
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中国科学院地球化学研究所, 贵阳, 550002
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1007-2802 |
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学科
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植物学 |
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基金
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国家自然科学基金资助项目
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文献收藏号
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CSCD:1512183
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