气候变化领域集成服务门户(CCPortal): 青藏高原冰川区可溶性有机碳含量和来源研究

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	青藏高原冰川区可溶性有机碳含量和来源研究
其他题名	Concentration and Source of Dissolved Organic Carbon in Snowpits of the Tibetan Plateau
	严芳萍; 康世昌; 陈鹏飞; 柏建坤; 李洋; 胡召富; 李潮流
发表日期	2015
ISSN	0250-3301
卷号	36 期号:8 页码:2827-2832
中文摘要	对青藏高原祁连山老虎沟12号冰川、唐古拉山小冬克玛底冰川及珠穆朗玛峰北坡东绒布冰川雪坑样品中可溶性有机碳(DOC)和主要离子的质量浓度进行了分析.结果表明3个雪坑中DOC的平均质量浓度分别为(250.30 157.10) 、(216.92 142.82)和(152.50 56.11) mug?L~(- 1),具有从北到南依次减小的空间分布特点. 3个雪坑DOC和主要离子质量浓度比例分析表明,唐古拉山冰川区和珠穆朗玛峰冰川区两个雪坑中DOC质量浓度与主要离子总质量浓度相当(DOC质量浓度占DOC与主要离子总质量浓度的比例分别为51%和49%). 相应地,祁连山冰川区雪坑由于地理位置和气候条件等因素,受粉尘影响较大,导致Ca~(2 +)的质量浓度最高可达5 299.18 mug?L~(- 1),DOC所占比例较低(仅占5%). 青藏高原冰川区DOC与Ca~(2 +)、 Mg~(2 +)、K~+和SO_4~(2 -)均呈显著正相关.主成分分析(PCA)表明,青藏高原冰川区雪坑DOC主要是自然来源,也有生物质、化石燃料燃烧和农业生产过程等人为排放的贡献.此外,对3个雪坑的碳沉降通量进行了估算,LHG、TGL和ZF这3个雪坑的碳沉降通量分别为189.23、132.76和128.44 mg?(m~2?a)~(- 1),这对该地区碳循环的深入认识和研究具有重要意义,同时也有利于冰川变化的研究.
英文摘要	Snowpit samples of three glaciers (Laohugou NO. 12 Glacier (LHG),Small Dongkemadi Glacier on Mount Tanggula (TGL) and East Rongbuk Glacier on Mount Everest (ZF)) in the Tibetan Plateau were collected. Concentrations of DOC and major ions were analyzed. The results showed that average DOC concentrations of the snowpits of LHG,TGL and ZF were (250.30 157.10),(216.92 142.82) and (152.50 56.11) mug?L~(- 1),respectively. DOC of TGL and ZF accounted for large parts of total values of DOC and ions. Correspondingly,DOC of LHG accounted for small part (only 5%),because LHG was located at north China and intensively influenced by natural mineral dust,which caused high concentrations of Ca~(2 +) (the highest value could reach 5 299.18 mug?L~(- 1)) and consequently low percentage of DOC of snowpit samples. Correlation and PCA analyses were used to study the sources of DOC. DOC was significantly correlated with Ca~(2 +),Mg~(2 +),K~+ and SO_4~(2 -). Additionally,PCA further indicated that the main potential source of DOC was the natural source of mineral dust. Meanwhile,anthropogenic pollutants (e. g. biomass,fossil combustion and agricultural related pollutants) could also not be ignored. Moreover,the carbon depositional fluxes of three snowpits were roughly estimated,and the values of LHG,TGL and ZF snowpits were 189.23,132.76 and 128.44 mg?(m~2?a)~(- 1),respectively,which played a significant role in the carbon cycle in this region and was also helpful for the study of glaciers fluctuation.
关键词	青藏高原冰川主要离子主成分分析
英文关键词	DOC;Tibetan Plateau;glaciers;DOC;major ions;PCA
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/89656
推荐引用方式 GB/T 7714	严芳萍,康世昌,陈鹏飞,等. 青藏高原冰川区可溶性有机碳含量和来源研究[J]. 中国科学院西北资源环境生态研究院,2015,36(8):2827-2832.
APA	严芳萍.,康世昌.,陈鹏飞.,柏建坤.,李洋.,...&李潮流.(2015).青藏高原冰川区可溶性有机碳含量和来源研究.环境科学,36(8),2827-2832.
MLA	严芳萍,et al."青藏高原冰川区可溶性有机碳含量和来源研究".环境科学 36.8(2015):2827-2832.