Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: differences between different snow categories
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 Tib...
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Cambridge University Press
2018
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Online Access: | https://doi.org/10.1017/aog.2018.20 https://doaj.org/article/00a865c77bbc4461a4bfa8e6297ee5a2 |
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ftdoajarticles:oai:doaj.org/article:00a865c77bbc4461a4bfa8e6297ee5a2 2023-05-15T13:29:36+02:00 Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: differences between different snow categories Lin Feng Yanqing An Jianzhong Xu Shichang Kang 2018-12-01T00:00:00Z https://doi.org/10.1017/aog.2018.20 https://doaj.org/article/00a865c77bbc4461a4bfa8e6297ee5a2 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0260305518000204/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2018.20 0260-3055 1727-5644 https://doaj.org/article/00a865c77bbc4461a4bfa8e6297ee5a2 Annals of Glaciology, Vol 59, Pp 31-40 (2018) biogeochemistry glacier chemistry mountain glaciers Meteorology. Climatology QC851-999 article 2018 ftdoajarticles https://doi.org/10.1017/aog.2018.20 2023-03-12T01:31:55Z 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. Article in Journal/Newspaper Annals of Glaciology Directory of Open Access Journals: DOAJ Articles Annals of Glaciology 59 77 31 40 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
biogeochemistry glacier chemistry mountain glaciers Meteorology. Climatology QC851-999 |
spellingShingle |
biogeochemistry glacier chemistry mountain glaciers Meteorology. Climatology QC851-999 Lin Feng Yanqing An Jianzhong Xu Shichang Kang Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: differences between different snow categories |
topic_facet |
biogeochemistry glacier chemistry mountain glaciers Meteorology. Climatology QC851-999 |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Lin Feng Yanqing An Jianzhong Xu Shichang Kang |
author_facet |
Lin Feng Yanqing An Jianzhong Xu Shichang Kang |
author_sort |
Lin Feng |
title |
Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: differences between different snow categories |
title_short |
Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: differences between different snow categories |
title_full |
Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: differences between different snow categories |
title_fullStr |
Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: differences between different snow categories |
title_full_unstemmed |
Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: differences between different snow categories |
title_sort |
characteristics and sources of dissolved organic matter in a glacier in the northern tibetan plateau: differences between different snow categories |
publisher |
Cambridge University Press |
publishDate |
2018 |
url |
https://doi.org/10.1017/aog.2018.20 https://doaj.org/article/00a865c77bbc4461a4bfa8e6297ee5a2 |
genre |
Annals of Glaciology |
genre_facet |
Annals of Glaciology |
op_source |
Annals of Glaciology, Vol 59, Pp 31-40 (2018) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0260305518000204/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2018.20 0260-3055 1727-5644 https://doaj.org/article/00a865c77bbc4461a4bfa8e6297ee5a2 |
op_doi |
https://doi.org/10.1017/aog.2018.20 |
container_title |
Annals of Glaciology |
container_volume |
59 |
container_issue |
77 |
container_start_page |
31 |
op_container_end_page |
40 |
_version_ |
1766001398611181568 |