夏季自然水体与大气界面间气态总汞的交换通量

被引：12

作者：

冯新斌

S.Jonas

G.Katarina

L.Oliver

机构：

[1] 中国科学院地球化学研究所

[2] Department

[3] Department 环境地球化学国家重点实验窒

[4] 贵阳　

[5] of Inorganic Chemistry

[6] Gteborg University

[7] S-　　Gteborg

[8] Sweden

[9] of Inorganic

来源：

中国科学(D辑:地球科学) | 2002年 / 07期

关键词：

通量箱; 汞; 溶解态气汞; 生物地球化学循环; 交换通量; 海水; 河水;

D O I：

暂无

中图分类号：

X831 [大气监测];

学科分类号：

0706 ; 070602 ;

摘要：

利用动力学通量箱法与高时间分辨率大气测汞仪的联用技术,在瑞典西南的Kristineberg海洋观测站（KMRS）和Knobesholm的Hovg(?)rds(?)n河分别测定了夏季海水和河水表面与大气间汞的交换通量.在夏季,河水和海水都是大气汞的源.河水和海水表面与大气间汞的交换通量在夏季具有一致的昼夜变化规律,白天由水体向大气排汞且在正午达到最大值;夜间排汞量相对较小且有时会出现大气汞向水体沉降.河水与大气间汞的交换通量与光照强度呈线性正相关关系,与大气相对湿度呈线性负相关性,同时还与水体温度存在指数相关性.海水与大气间汞交换通量只与光照强度存在良好的线性正相关关系.水体中溶解态气汞的过饱和是水体汞向大气释放的驱动力.

引用

页码：609 / 616

页数：8

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