气候变化领域集成服务门户(CCPortal): 青藏高原内陆典型冰川区"冰川-径流"汞传输过程

CCPortal

	青藏高原内陆典型冰川区"冰川-径流"汞传输过程
其他题名	Mercury Transport from Glacier to Runoff in Typical Inland Glacial Area in the Tibetan Plateau
	孙学军; 王康; 郭军明; 康世昌; 张国帅; 黄杰; 丛志远; 张强弓
发表日期	2016
ISSN	0250-3301
卷号	37 期号:2 页码:482-489
中文摘要	为研究青藏高原内陆典型冰川区"冰川-径流"汞输送过程,于2011年8月15日~9月9日对青藏高原内陆念青唐古拉山脉扎当冰川-曲嘎切流域内雪坑、冰川融水以及径流进行了采样,检测了不同环境介质中汞浓度,并分析了不同介质中汞的控制因素及输送过程. 结果表明,扎当冰川-曲嘎切流域内雪坑、冰川融水以及曲嘎切径流中总汞浓度分别为(3.795.12)、 (1.060.77)和(1.020.24)ng·L~(-1),处于全球背景水平. 不同环境介质中均以颗粒态汞为主,受到总悬浮颗粒物和径流量的控制. 随着气温升高,冰川消融,受其补给的河流径流量增加. 不同环境介质间,从冰川末端融水到曲嘎切下游河水,总汞浓度峰值时间分别是14:00、 16:00和20:00以后,体现了汞在"冰川-径流"环境系统中随冰川消融、径流量变化的释放和传输过程. 冰川补给河流汞的传输受多种因素制约,气候变化背景下,冰川消融和径流增加带来的侵蚀将在汞释放及其向下游传输发挥日益重要的作用.
英文摘要	To investigate the transport of mercury from glacier to runoff in typical inland glacial area in the Tibetan Plateau, we selected Zhadang glacier and Qugaqie river Basin located in the Nyainqentanglha Range region and collected samples from snow pit, glacier melt-water and Qugaqie river water during 15~(th) August to 9~(th) September 2011. Mercury speciation and concentrations were determined and their distribution and controlling factors in different environmental compartments were analyzed. The results showed that the average THg concentrations were (3.795.12) ng·L~(-1),(1.060.77) ng·L~(-1)and (1.020.24) ng·L~(-1) for glacier snow, glacier melt-water and Qugaqie river water, respectively, all of which were at the global background levels. Particulate-bound mercury accounted for large proportion of mercury in all environmental matrices, while mercury in glacial melt-water was controlled by total suspended particle, and mercury in Qugaqie river water co-varied with runoff. With the increase of temperature, glacier melted and released water as well as mercury into glacier-fed river. Total mercury concentrations in glacier melt water, upstream and downstream peaked at 14:00, 16:00 and after 20:00, respectively, reflecting the process of mercury release from glacier and its subsequent transport in the glacier fed river. The transport of riverine mercury was controlled by multiple factors. Under the context of climate change, glacier ablation and the increasing runoff will play increasingly important roles in mercury release and transport.
关键词	青藏高原冰川河流汞传输
英文关键词	Tibetan Plateau;glacier;river;mercury;transport
语种	中文
来源期刊	环境科学
来源机构	中国科学院西北资源环境生态研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/89653
推荐引用方式 GB/T 7714	孙学军,王康,郭军明,等. 青藏高原内陆典型冰川区"冰川-径流"汞传输过程[J]. 中国科学院西北资源环境生态研究院,2016,37(2):482-489.
APA	孙学军.,王康.,郭军明.,康世昌.,张国帅.,...&张强弓.(2016).青藏高原内陆典型冰川区"冰川-径流"汞传输过程.环境科学,37(2),482-489.
MLA	孙学军,et al."青藏高原内陆典型冰川区"冰川-径流"汞传输过程".环境科学 37.2(2016):482-489.