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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Cambridge University Press
2024-01-01
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| Series: | Journal of Glaciology |
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| 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 |
| collection | DOAJ |
| 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 |
| id | doaj-art-01d44a6862824882b60c22ac61a05f9b |
| institution | Kabale University |
| issn | 0022-1430 1727-5652 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Cambridge University Press |
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| series | Journal of Glaciology |
| spelling | doaj-art-01d44a6862824882b60c22ac61a05f9b2025-01-16T21:52:40ZengCambridge University PressJournal of Glaciology0022-14301727-56522024-01-017010.1017/jog.2024.23Distribution and isotopic compositions of n-alkanes and n-alkenes in the cryoconites from the Tibetan Plateau glaciersQuanlian Li0https://orcid.org/0000-0002-4684-1062Shichang Kang1Shijin Wang2Ninglian Wang3Xiaobo Wu4Wasim Sajjad5Huan Yang6Yao Li7Jingquan Wu8Northwest Institute of Eco-Environment and Resources, State Key Laboratory of Frozen Soil Engineering, SKLCS Lanzhou, Gansu, CN, CAS, Lanzhou 730000, China Yulong Snow Mountain Station of Cryosphere and Sustainable Development, State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, ChinaNorthwest Institute of Eco-Environment and Resources, State Key Laboratory of Frozen Soil Engineering, SKLCS Lanzhou, Gansu, CN, CAS, Lanzhou 730000, China University of Chinese Academy of Sciences, Beijing 100049, ChinaNorthwest Institute of Eco-Environment and Resources, State Key Laboratory of Frozen Soil Engineering, SKLCS Lanzhou, Gansu, CN, CAS, Lanzhou 730000, China Yulong Snow Mountain Station of Cryosphere and Sustainable Development, State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, ChinaShaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, Xi'an 710127, China Institute of Earth Surface System and Hazards, Northwest University, Xi'an 710127, China College of Urban and Environmental Sciences, Northwest University, Xi'an 710127, ChinaNorthwest Institute of Eco-Environment and Resources, State Key Laboratory of Frozen Soil Engineering, SKLCS Lanzhou, Gansu, CN, CAS, Lanzhou 730000, ChinaNorthwest Institute of Eco-Environment and Resources, State Key Laboratory of Frozen Soil Engineering, SKLCS Lanzhou, Gansu, CN, CAS, Lanzhou 730000, ChinaHubei Key Laboratory of Critical Zone Evolution, School of Geography and Information Engineering, China University of Geosciences, Wuhan 430074, ChinaNorthwest Institute of Eco-Environment and Resources, State Key Laboratory of Frozen Soil Engineering, SKLCS Lanzhou, Gansu, CN, CAS, Lanzhou 730000, ChinaNorthwest Institute of Eco-Environment and Resources, State Key Laboratory of Frozen Soil Engineering, SKLCS Lanzhou, Gansu, CN, CAS, Lanzhou 730000, ChinaIn 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.https://www.cambridge.org/core/product/identifier/S0022143024000236/type/journal_articlecryoconiteglaciern-alkanen-alkeneTibetan Plateau |
| spellingShingle | 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 Journal of Glaciology cryoconite glacier n-alkane n-alkene Tibetan Plateau |
| title | 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_short | 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 |
| topic | cryoconite glacier n-alkane n-alkene Tibetan Plateau |
| url | https://www.cambridge.org/core/product/identifier/S0022143024000236/type/journal_article |
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