Mercury Sources Between Zhongshan Station and Dome A, Eastern Antarctica Identified Using Mercury Stable Isotopes
Abstract Although mercury (Hg) is a neurotoxic metal of global relevance, its Antarctic biogeochemical cycles are not well characterized. Here, we present the total Hg (THg) distribution and stable isotopic fractionation between the Zhongshan Station and Dome A (1,248 km), in eastern Antarctica, to...
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| Format: | Article |
| Language: | English |
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Wiley
2025-02-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL112649 |
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| author | Chuanjin Li Jiubin Chen Guitao Shi Ruoyu Sun Wang Zheng Hélène Angot Minghu Ding Hongming Cai Zhiheng Du Rui Guo Cunde Xiao Bo Sun Jiawen Ren Dahe Qin |
| author_facet | Chuanjin Li Jiubin Chen Guitao Shi Ruoyu Sun Wang Zheng Hélène Angot Minghu Ding Hongming Cai Zhiheng Du Rui Guo Cunde Xiao Bo Sun Jiawen Ren Dahe Qin |
| author_sort | Chuanjin Li |
| collection | DOAJ |
| description | Abstract Although mercury (Hg) is a neurotoxic metal of global relevance, its Antarctic biogeochemical cycles are not well characterized. Here, we present the total Hg (THg) distribution and stable isotopic fractionation between the Zhongshan Station and Dome A (1,248 km), in eastern Antarctica, to characterize THg sources and controlling factors. Surface snow samples and snow blocks similarly exhibited higher THg concentrations in the coastal and interior sections than the intermediate section. From the THg distribution and stable isotopic fractionation (notably for 200Hg and 202Hg), we inferred an adjacent oceanic Hg source for the coastal section and primary oceanic sources at 63°S–55°S and 50°S–45°S for the intermediate and interior sections, respectively. Snow drifting and postdepositional effects also influenced THg concentrations and stable isotopic fractionation, particularly in areas with marked terrain slope variations. Finally, the stratospheric contribution of THg near Dome A was negligible, with a possible transport pathway through the lower troposphere. |
| format | Article |
| id | doaj-art-938f847f434249c188ff82dfd71a2f2c |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-938f847f434249c188ff82dfd71a2f2c2025-08-20T01:50:38ZengWileyGeophysical Research Letters0094-82761944-80072025-02-01524n/an/a10.1029/2024GL112649Mercury Sources Between Zhongshan Station and Dome A, Eastern Antarctica Identified Using Mercury Stable IsotopesChuanjin Li0Jiubin Chen1Guitao Shi2Ruoyu Sun3Wang Zheng4Hélène Angot5Minghu Ding6Hongming Cai7Zhiheng Du8Rui Guo9Cunde Xiao10Bo Sun11Jiawen Ren12Dahe Qin13Polar Research Institute of China Shanghai ChinaInstitute of Surface‐Earth System Science Tianjin University Tianjin ChinaKey Laboratory of Geographic Information Science Ministry of Education School of Geographic Sciences State Key Laboratory of Estuarine and Coastal Research East China Normal University Shanghai ChinaInstitute of Surface‐Earth System Science Tianjin University Tianjin ChinaInstitute of Surface‐Earth System Science Tianjin University Tianjin ChinaInstitute of Environmental Geosciences (IGE) Université Grenoble Alpes Grenoble FranceInstitute of Tibetan Plateau and Polar Regions Meteorology Chinese Academy of Meteorological Sciences Beijing ChinaInstitute of Surface‐Earth System Science Tianjin University Tianjin ChinaState Key Laboratory of Cryospheric Science Northwest Institute of Eco‐Environment and Resources Chinese Academy of Sciences Lanzhou ChinaKey Laboratory of Ecological Safety and Sustainable Development in Arid Lands Northwest Institute of Eco‐Environment and Resources Chinese Academy of Sciences Lanzhou ChinaState Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University Beijing ChinaPolar Research Institute of China Shanghai ChinaState Key Laboratory of Cryospheric Science Northwest Institute of Eco‐Environment and Resources Chinese Academy of Sciences Lanzhou ChinaState Key Laboratory of Cryospheric Science Northwest Institute of Eco‐Environment and Resources Chinese Academy of Sciences Lanzhou ChinaAbstract Although mercury (Hg) is a neurotoxic metal of global relevance, its Antarctic biogeochemical cycles are not well characterized. Here, we present the total Hg (THg) distribution and stable isotopic fractionation between the Zhongshan Station and Dome A (1,248 km), in eastern Antarctica, to characterize THg sources and controlling factors. Surface snow samples and snow blocks similarly exhibited higher THg concentrations in the coastal and interior sections than the intermediate section. From the THg distribution and stable isotopic fractionation (notably for 200Hg and 202Hg), we inferred an adjacent oceanic Hg source for the coastal section and primary oceanic sources at 63°S–55°S and 50°S–45°S for the intermediate and interior sections, respectively. Snow drifting and postdepositional effects also influenced THg concentrations and stable isotopic fractionation, particularly in areas with marked terrain slope variations. Finally, the stratospheric contribution of THg near Dome A was negligible, with a possible transport pathway through the lower troposphere.https://doi.org/10.1029/2024GL112649mercury stable isotopesmarine sourcesCHINARE transecteastern Antarctica |
| spellingShingle | Chuanjin Li Jiubin Chen Guitao Shi Ruoyu Sun Wang Zheng Hélène Angot Minghu Ding Hongming Cai Zhiheng Du Rui Guo Cunde Xiao Bo Sun Jiawen Ren Dahe Qin Mercury Sources Between Zhongshan Station and Dome A, Eastern Antarctica Identified Using Mercury Stable Isotopes Geophysical Research Letters mercury stable isotopes marine sources CHINARE transect eastern Antarctica |
| title | Mercury Sources Between Zhongshan Station and Dome A, Eastern Antarctica Identified Using Mercury Stable Isotopes |
| title_full | Mercury Sources Between Zhongshan Station and Dome A, Eastern Antarctica Identified Using Mercury Stable Isotopes |
| title_fullStr | Mercury Sources Between Zhongshan Station and Dome A, Eastern Antarctica Identified Using Mercury Stable Isotopes |
| title_full_unstemmed | Mercury Sources Between Zhongshan Station and Dome A, Eastern Antarctica Identified Using Mercury Stable Isotopes |
| title_short | Mercury Sources Between Zhongshan Station and Dome A, Eastern Antarctica Identified Using Mercury Stable Isotopes |
| title_sort | mercury sources between zhongshan station and dome a eastern antarctica identified using mercury stable isotopes |
| topic | mercury stable isotopes marine sources CHINARE transect eastern Antarctica |
| url | https://doi.org/10.1029/2024GL112649 |
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