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| DOI | 10.1017/aog.2018.20 |
| Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: Differences between different snow categories | |
| Feng L.; An Y.; Xu J.; Kang S. | |
| 发表日期 | 2018 |
| ISSN | 02603055 |
| 卷号 | 59期号:77 |
| 英文摘要 | Dissolved organic matter (DOM) in mountain glaciers is an important source of carbon for downstream aquatic systems, and its impact is expected to increase due to the increased melting rate of glaciers. We present a comprehensive study of Laohugou glacier no. 12 (LHG) at the northern edge of the Tibetan Plateau to characterize the DOM composition and sources by analyzing surface fresh snow, granular ice samples, and snow pit samples which covered a whole year cycle of 2014/15. Excitation-emission matrix fluorescence spectroscopy analysis of the DOM with parallel factor analysis (EEM-PARAFAC) identified four components, including a microbially humic-like component (C1), two protein-like components (C2 and C3) and a terrestrial humic-like component (C4). The use of Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) showed that DOM from all these samples was dominated by CHO and CHON molecular formulas, mainly corresponding to lipids and aliphatic/proteins compounds, reflecting the presence of significant amounts of microbially derived and/or deposited biogenic DOM. The molecular compositions of DOM showed more CHON compounds in granular ice than in fresh snow, likely suggesting newly formed DOM from microbes during snowmelting. © 2018 The Author(s). |
| 英文关键词 | biogeochemistry; glacier chemistry; mountain glaciers |
| URL | https://www2.scopus.com/inward/record.uri?eid=2-s2.0-85065151817&doi=10.1017%2faog.2018.20&partnerID=40&md5=ba20c569d16b49c59b96760b5dc339fb |
| 语种 | 英语 |
| scopus关键词 | biogeochemistry; chemical composition; dissolved organic matter; glacier; snow; China; Laohugou Glacier; Qinghai-Xizang Plateau; Xinjiang Uygur |
| 来源期刊 | Annals of Glaciology
 |
| 来源机构 | 中国科学院西北生态环境资源研究院 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/77240 |
| 推荐引用方式 GB/T 7714 | Feng L.； An Y.； Xu J.； Kang S.. Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: Differences between different snow categories[J]. 中国科学院西北生态环境资源研究院,2018,59(77). |
| APA | Feng L.； An Y.； Xu J.； Kang S..(2018).Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: Differences between different snow categories.Annals of Glaciology,59(77). |
| MLA | Feng L.； An Y.； Xu J.； Kang S.."Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: Differences between different snow categories".Annals of Glaciology 59.77(2018). |
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