Distribution and Driving Mechanism of N2O in Sea Ice and Its Underlying Seawater during Arctic Melt Season
Nitrous oxide (N2O) is the third most important greenhouse gas in the atmosphere, and the ocean is an important source of N2O. As the Arctic Ocean is strongly affected by global warming, rapid ice melting can have a significant impact on the N2O pattern in the Arctic environment. To better understan...
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ftmdpi:oai:mdpi.com:/2073-4441/14/2/145/ 2023-08-20T04:03:36+02:00 Distribution and Driving Mechanism of N2O in Sea Ice and Its Underlying Seawater during Arctic Melt Season Jian Liu Liyang Zhan Qingkai Wang Man Wu Wangwang Ye Jiexia Zhang Yuhong Li Jianwen Wen Liqi Chen agris 2022-01-07 application/pdf https://doi.org/10.3390/w14020145 EN eng Multidisciplinary Digital Publishing Institute Oceans and Coastal Zones https://dx.doi.org/10.3390/w14020145 https://creativecommons.org/licenses/by/4.0/ Water; Volume 14; Issue 2; Pages: 145 nitrous oxide Arctic Ocean sea ice underlying seawater ice melting Text 2022 ftmdpi https://doi.org/10.3390/w14020145 2023-08-01T03:46:20Z Nitrous oxide (N2O) is the third most important greenhouse gas in the atmosphere, and the ocean is an important source of N2O. As the Arctic Ocean is strongly affected by global warming, rapid ice melting can have a significant impact on the N2O pattern in the Arctic environment. To better understand this impact, N2O concentration in ice core and underlying seawater (USW) was measured during the seventh Chinese National Arctic Research Expedition (CHINARE2016). The results showed that the average N2O concentration in first-year ice (FYI) was 4.5 ± 1.0 nmol kg−1, and that in multi-year ice (MYI) was 4.8 ± 1.9 nmol kg−1. Under the influence of exchange among atmosphere-sea ice-seawater systems, brine dynamics and possible N2O generation processes at the bottom of sea ice, the FYI showed higher N2O concentrations at the bottom and surface, while lower N2O concentrations were seen inside sea ice. Due to the melting of sea ice and biogeochemical processes, USW presented as the sink of N2O, and the saturation varied from 47.2% to 102.2%. However, the observed N2O concentrations in USW were higher than that of T-N2OUSW due to the sea–air exchange, diffusion process, possible N2O generation mechanism, and the influence of precipitation, and a more detailed mechanism is needed to understand this process in the Arctic Ocean. Text Arctic Arctic Ocean Global warming ice core Sea ice MDPI Open Access Publishing Arctic Arctic Ocean Water 14 2 145 |
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Open Polar |
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MDPI Open Access Publishing |
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ftmdpi |
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English |
topic |
nitrous oxide Arctic Ocean sea ice underlying seawater ice melting |
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nitrous oxide Arctic Ocean sea ice underlying seawater ice melting Jian Liu Liyang Zhan Qingkai Wang Man Wu Wangwang Ye Jiexia Zhang Yuhong Li Jianwen Wen Liqi Chen Distribution and Driving Mechanism of N2O in Sea Ice and Its Underlying Seawater during Arctic Melt Season |
topic_facet |
nitrous oxide Arctic Ocean sea ice underlying seawater ice melting |
description |
Nitrous oxide (N2O) is the third most important greenhouse gas in the atmosphere, and the ocean is an important source of N2O. As the Arctic Ocean is strongly affected by global warming, rapid ice melting can have a significant impact on the N2O pattern in the Arctic environment. To better understand this impact, N2O concentration in ice core and underlying seawater (USW) was measured during the seventh Chinese National Arctic Research Expedition (CHINARE2016). The results showed that the average N2O concentration in first-year ice (FYI) was 4.5 ± 1.0 nmol kg−1, and that in multi-year ice (MYI) was 4.8 ± 1.9 nmol kg−1. Under the influence of exchange among atmosphere-sea ice-seawater systems, brine dynamics and possible N2O generation processes at the bottom of sea ice, the FYI showed higher N2O concentrations at the bottom and surface, while lower N2O concentrations were seen inside sea ice. Due to the melting of sea ice and biogeochemical processes, USW presented as the sink of N2O, and the saturation varied from 47.2% to 102.2%. However, the observed N2O concentrations in USW were higher than that of T-N2OUSW due to the sea–air exchange, diffusion process, possible N2O generation mechanism, and the influence of precipitation, and a more detailed mechanism is needed to understand this process in the Arctic Ocean. |
format |
Text |
author |
Jian Liu Liyang Zhan Qingkai Wang Man Wu Wangwang Ye Jiexia Zhang Yuhong Li Jianwen Wen Liqi Chen |
author_facet |
Jian Liu Liyang Zhan Qingkai Wang Man Wu Wangwang Ye Jiexia Zhang Yuhong Li Jianwen Wen Liqi Chen |
author_sort |
Jian Liu |
title |
Distribution and Driving Mechanism of N2O in Sea Ice and Its Underlying Seawater during Arctic Melt Season |
title_short |
Distribution and Driving Mechanism of N2O in Sea Ice and Its Underlying Seawater during Arctic Melt Season |
title_full |
Distribution and Driving Mechanism of N2O in Sea Ice and Its Underlying Seawater during Arctic Melt Season |
title_fullStr |
Distribution and Driving Mechanism of N2O in Sea Ice and Its Underlying Seawater during Arctic Melt Season |
title_full_unstemmed |
Distribution and Driving Mechanism of N2O in Sea Ice and Its Underlying Seawater during Arctic Melt Season |
title_sort |
distribution and driving mechanism of n2o in sea ice and its underlying seawater during arctic melt season |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/w14020145 |
op_coverage |
agris |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Global warming ice core Sea ice |
genre_facet |
Arctic Arctic Ocean Global warming ice core Sea ice |
op_source |
Water; Volume 14; Issue 2; Pages: 145 |
op_relation |
Oceans and Coastal Zones https://dx.doi.org/10.3390/w14020145 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/w14020145 |
container_title |
Water |
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14 |
container_issue |
2 |
container_start_page |
145 |
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