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学科主题: 地理学::自然地理学
题名: Concentration, sources and light absorption characteristics of dissolved organic carbon on a medium-sized valley glacier, northern Tibetan Plateau
作者: Yan, FP (Yan, Fangping)1, 4, 5; Kang, SC (Kang, Shichang)1, 3, 4; Li, CL (Li, Chaoliu)2, 3; Zhang, YL (Zhang, Yulan)1; Qin, X (Qin, Xiang)1; Li, Y (Li, Yang)2, 4; Zhang, XP (Zhang, Xiaopeng)1, 4; Hu, ZF (Hu, Zhaofu)1, 4; Chen, PF (Chen, Pengfei)2; Li, XF (Li, Xiaofei)1; Qu, B (Qu, Bin)5; Sillanpaa, M (Sillanpaa, Mika)5, 6
通讯作者: Kang, SC ; Kang, SC ; Li, CL ; Li, CL
关键词: WESTERN QILIAN MOUNTAINS ; BLACK CARBON ; BROWN CARBON ; ICE CORE ; MERCURY DISTRIBUTION ; OPTICAL-PROPERTIES ; ZHADANG GLACIER ; MATTER ; AEROSOLS ; CHINA
刊名: CRYOSPHERE
发表日期: 2016
DOI: 10.5194/tc-10-2611-2016
卷: 10, 期:6, 页:2611-2621
收录类别: SCI
合作性质: 国际
文章类型: Article
英文摘要: Light-absorbing dissolved organic carbon (DOC) constitutes a major part of the organic carbon in glacierized regions, and has important influences on the carbon cycle and radiative forcing of glaciers. However, few DOC data are currently available from the glacierized regions of the Tibetan Plateau (TP). In this study, DOC characteristics of a medium-sized valley glacier (Laohugou Glacier No. 12, LHG) on the northern TP were investigated. Generally, DOC concentrations on LHG were comparable to those in other regions around the world. DOC concentrations in snow pits, surface snow and surface ice (superimposed ice) were 332 +/- 132, 229 +/- 104 and 426 +/- 270 mu g L-1, respectively. The average discharge-weighted DOC of proglacial stream water was 238 +/- 96 mu g L-1, and the annual DOC flux released from this glacier was estimated to be 6949 kg Cyr(-1), of which 46.2% of DOC was bioavailable and could be decomposed into CO2 within 1 month of its release. The mass absorption cross section (MAC) of DOC at 365 nm was 1.4 +/- 0.4 m(2) g(-1) in snow and 1.3 +/- 0.7 m(2) g(-1) in ice, similar to the values for dust transported from adjacent deserts. Moreover, there was a significant relationship between DOC and Ca2+; therefore, mineral dust transported from adjacent arid regions likely made important contributions to DOC of the glacierized regions, although contributions from autochthonous carbon and au-tochthonous/heterotrophic microbial activity cannot be ruled out. The radiative forcing of snow pit DOC was calculated to be 0.43 W m(-2), demonstrating that DOC in snow needs to be taken into consideration in accelerating melt of glaciers on the TP.
语种: 英语
WOS记录号: WOS:000387128600001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7496
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Qilian Stn Glaciol & Ecol Environm, Lanzhou 730000, Peoples R China
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China
3.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Lappeenranta Univ Technol, Lab Green Chem, Sammonkatu 12, Mikkeli 50130, Finland
6.Florida Int Univ, Dept Civil & Environm Engn, Miami, FL 33174 USA

Recommended Citation:
Yan, FP ,Kang, SC ,Li, CL ,et al. Concentration, sources and light absorption characteristics of dissolved organic carbon on a medium-sized valley glacier, northern Tibetan Plateau[J]. CRYOSPHERE,2016,10(6):2611-2621.
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