Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciers
In the current study, cryoconite samples were collected from six glaciers on the Tibetan Plateau to analyze n-alkanes and n-alkenes. The findings revealed that the concentrations of n-alkanes and n-alkenes varied from 40.1 to 496.1 μg g−1 and from 4.6 to 13.8 μg g−1, respectively. The carbon prefere...
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ftdoajarticles:oai:doaj.org/article:01d44a6862824882b60c22ac61a05f9b 2024-09-09T19:49:05+00:00 Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciers Quanlian Li Shichang Kang Shijin Wang Ninglian Wang Xiaobo Wu Wasim Sajjad Huan Yang Yao Li Jingquan Wu https://doi.org/10.1017/jog.2024.23 https://doaj.org/article/01d44a6862824882b60c22ac61a05f9b EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143024000236/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2024.23 0022-1430 1727-5652 https://doaj.org/article/01d44a6862824882b60c22ac61a05f9b Journal of Glaciology, Pp 1-9 cryoconite glacier n-alkane n-alkene Tibetan Plateau Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article ftdoajarticles https://doi.org/10.1017/jog.2024.23 2024-08-05T17:49:28Z In the current study, cryoconite samples were collected from six glaciers on the Tibetan Plateau to analyze n-alkanes and n-alkenes. The findings revealed that the concentrations of n-alkanes and n-alkenes varied from 40.1 to 496.1 μg g−1 and from 4.6 to 13.8 μg g−1, respectively. The carbon preference index of the long-chain n-alkanes ranged from 3.3 to 8.4, and the average chain length ranged from 28.7 to 29.3. Moreover, the δ13C of the n-alkanes in cryoconites were within the range of C3 plants, demonstrating that the n-alkanes in cryoconites were only derived from vascular plants. However, the δDmean were more negative than that of C3 plants, which could be caused by dry and humid conditions of glaciers. Unlike n-alkanes, n-alkenes ranged from C17:1 to C30:1 and showed a weak even-over-odd carbon number preference in the Dongkemadi, Yuzhufeng, Laohugou and Tianshan glacier, but a weak odd carbon preference in the Qiyi glacier. The n-alkenes in the YL Snow Mountains showed an obvious odd-over-even carbon number predominance from C17:1 to C22:1 with Cmax at C19:1, and the even-over-odd carbon number preference from C23:1 to C30:1 with Cmax at C28:1. This demonstrated that the n-alkenes of cryoconites may be mainly derived from in situ production in glaciers. Article in Journal/Newspaper Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Journal of Glaciology 1 9 |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
cryoconite glacier n-alkane n-alkene Tibetan Plateau Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
cryoconite glacier n-alkane n-alkene Tibetan Plateau Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Quanlian Li Shichang Kang Shijin Wang Ninglian Wang Xiaobo Wu Wasim Sajjad Huan Yang Yao Li Jingquan Wu Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciers |
topic_facet |
cryoconite glacier n-alkane n-alkene Tibetan Plateau Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
In the current study, cryoconite samples were collected from six glaciers on the Tibetan Plateau to analyze n-alkanes and n-alkenes. The findings revealed that the concentrations of n-alkanes and n-alkenes varied from 40.1 to 496.1 μg g−1 and from 4.6 to 13.8 μg g−1, respectively. The carbon preference index of the long-chain n-alkanes ranged from 3.3 to 8.4, and the average chain length ranged from 28.7 to 29.3. Moreover, the δ13C of the n-alkanes in cryoconites were within the range of C3 plants, demonstrating that the n-alkanes in cryoconites were only derived from vascular plants. However, the δDmean were more negative than that of C3 plants, which could be caused by dry and humid conditions of glaciers. Unlike n-alkanes, n-alkenes ranged from C17:1 to C30:1 and showed a weak even-over-odd carbon number preference in the Dongkemadi, Yuzhufeng, Laohugou and Tianshan glacier, but a weak odd carbon preference in the Qiyi glacier. The n-alkenes in the YL Snow Mountains showed an obvious odd-over-even carbon number predominance from C17:1 to C22:1 with Cmax at C19:1, and the even-over-odd carbon number preference from C23:1 to C30:1 with Cmax at C28:1. This demonstrated that the n-alkenes of cryoconites may be mainly derived from in situ production in glaciers. |
format |
Article in Journal/Newspaper |
author |
Quanlian Li Shichang Kang Shijin Wang Ninglian Wang Xiaobo Wu Wasim Sajjad Huan Yang Yao Li Jingquan Wu |
author_facet |
Quanlian Li Shichang Kang Shijin Wang Ninglian Wang Xiaobo Wu Wasim Sajjad Huan Yang Yao Li Jingquan Wu |
author_sort |
Quanlian Li |
title |
Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciers |
title_short |
Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciers |
title_full |
Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciers |
title_fullStr |
Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciers |
title_full_unstemmed |
Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciers |
title_sort |
distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the tibetan plateau glaciers |
publisher |
Cambridge University Press |
url |
https://doi.org/10.1017/jog.2024.23 https://doaj.org/article/01d44a6862824882b60c22ac61a05f9b |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology, Pp 1-9 |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143024000236/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2024.23 0022-1430 1727-5652 https://doaj.org/article/01d44a6862824882b60c22ac61a05f9b |
op_doi |
https://doi.org/10.1017/jog.2024.23 |
container_title |
Journal of Glaciology |
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1 |
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9 |
_version_ |
1809918481198481408 |