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首页> 外文期刊>Environmental Science & Technology >Change of Dissolved Gaseous Mercury Concentrations in a Southern Reservoir Lake (Tennessee) Following Seasonal Variation of Solar Radiation
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Change of Dissolved Gaseous Mercury Concentrations in a Southern Reservoir Lake (Tennessee) Following Seasonal Variation of Solar Radiation

机译：太阳辐射的季节性变化后，南部水库湖（田纳西州）中溶解性气态汞浓度的变化

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摘要

A 12-month field study was conducted consecutively from June 2003 to May 2004 to quantify temporal variations of dissolved gaseous mercury (DGM) concentrations in Cane Creek Lake,a southern reservoir lake (Cookeville,TN).Diurnal changes of DGM concentrations in two periods (morning increase vs afternoon decrease with an around-noon peak) were observed,and the changes closely followed daily solar radiation variation trends.The diurnal patterns prevailed in the late spring and summer,but became vague in the late fall and winter.The monthly mean DGM concentrations peaked at 40.8 pg L~(-1) in July and reached the lowest at 14.2 pg L~(-1) in December and 21.9 pg L~(-1) in January;this DGM concentration change closely followed the monthly mean solar radiation variation trend.The increase of the lake DGM concentration from January to July and its decrease from July to December mirrorthe typical daily rhythm of DGM concentration variations in the two periods.This finding supports the following hypothesis:The natural phenomenon of daily oscillation of freshwater DGM concentrations that follows diurnal solar radiation variation would manifest on a seasonal scale.High DGM concentrations were found in the spring and summer and low in the fall and winter (seasonal mean:34.2,37.5,20.0,24.4 pg L~(-1),respectively).This seems to suggest an annual occurrence of two periods of the seasonal DGM level fluctuation (spring and summer high vs fall and winter low DGM levels).Linear relationships of the monthly mean DGM concentrations were found with the monthly mean global solar radiation (R~2=0.82,P < 0.05) and UVA radiation (R2=0.84,P < 0.05).Linear relationships of the seasonal mean DGM concentrations were also found with the seasonal mean global solar radiation (R~2=0.85,P=0.08) and UVA radiation (R~2=0.93,P < 0.05).
机译：从2003年6月至2004年5月连续进行了为期12个月的野外研究，以量化南部水库湖（田纳西州库克维尔）Cane Creek湖中溶解性气态汞（DGM）浓度的时间变化.DGM浓度在两个时期的日变化观测到（早晨增加与下午减少，并在午夜左右达到峰值），并且其变化紧密跟随每日太阳辐射的变化趋势。昼夜模式在春季和夏季盛行，但在秋末和冬季变得模糊。平均DGM浓度在7月达到40.8 pg L〜（-1）的峰值，在12月和1月达到最低的14.2 pg L〜（-1）; 1月份的DGM浓度变化紧随每月平均太阳辐射变化趋势.1月至7月湖DGM浓度的增加和7月至12月的减少都反映了两个时期DGM浓度典型的每日节律。假设：日照辐射变化引起的淡水DGM浓度每日振荡的自然现象会在季节尺度上体现出来。春季和夏季发现DGM浓度较高，而秋季和冬季则较低（季节平均值：34.2、37.5，分别为20.0,24.4 pg L〜（-1）。这似乎表明每年出现两个时期的DGM水平波动（春季和夏季高DGM水平和秋季和冬季低DGM水平）。发现DGM浓度与月平均总太阳辐射（R〜2 = 0.82，P <0.05）和UVA辐射（R2 = 0.84，P <0.05）以及季节平均值DGM浓度与季节平均值呈线性关系总体太阳辐射（R〜2 = 0.85，P = 0.08）和UVA辐射（R〜2 = 0.93，P <0.05）。

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  • 来源
    《Environmental Science & Technology》 |2006年第7期|p.2114-2119|共6页
  • 作者

    HONG ZHANG; CHRISTOPHER DILL; TODD KUIKEN; MELISSA ENSOR; WILLIAM CHAD CROCKER;

  • 作者单位

    Department of Chemistry,Box 5055,Tennessee Technological University,Cookeville,Tennessee 38505;

    Department of Chemistry,Box 5055,Tennessee Technological University,Cookeville,Tennessee 38505;

    Department of Chemistry,Box 5055,Tennessee Technological University,Cookeville,Tennessee 38505;

    Department of Chemistry,Box 5055,Tennessee Technological University,Cookeville,Tennessee 38505;

    Department of Chemistry,Box 5055,Tennessee Technological University,Cookeville,Tennessee 38505;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
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