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Influence of oceanic ventilation and terrestrial transport on the atmospheric volatile chlorinated hydrocarbons over the Western Pacific

文献类型：期刊论文

作者Liu, Shan-Shan1,3; Ni, Jie1; Song, Jin-Ming3; Gao, Xu-Xu1; He, Zhen1,2; Yang, Gui-Peng1,2,4
刊名ATMOSPHERIC CHEMISTRY AND PHYSICS
出版日期2025-11-06
卷号25期号:21页码:14967-14986
ISSN号1680-7316
DOI10.5194/acp-25-14967-2025
通讯作者He, Zhen(zhenhe@ouc.edu.cn) ; Yang, Gui-Peng(gpyang@mail.ouc.edu.cn)
英文摘要Volatile chlorinated hydrocarbons (VCHCs), key ozone-depleting substances and greenhouse gases, depend on oceanic emission and uptake for their atmospheric budget. However, data on VCHCs in the Western Pacific remain limited. This study investigated the distribution and sources of VCHCs (CHCl3, C2HCl3, CCl4, and CH3CCl3) in the Western Pacific during 2019-2020. Elevated seawater concentrations of CHCl3 and C2HCl3 in the Kuroshio-Oyashio Extension were driven by mesoscale eddies, enhancing primary productivity, while CCl4 and CH3CCl3 concentrations were mainly influenced by atmospheric inputs. Atmospheric concentrations of VCHCs decreased from coastal to open ocean areas, with terrestrial air masses contributing significantly. Additionally, positive saturation anomalies and correlations with chlorophyll a indicated the marine biological source for atmospheric CHCl3 and C2HCl3. However, the atmospheric concentration variability of these gases was not fully consistent with oceanic emissions indicators (saturation anomalies and sea-air fluxes) and showed strong correlations with terrestrial tracers, indicating that land-derived atmospheric transport primarily influenced atmospheric CHCl3 and C2HCl3. The estimated sea-air flux indicated that the Western Pacific acted as a source for CHCl3 and C2HCl3 but a sink for CCl4 and CH3CCl3, with the potential to absorb 14.3 +/- 6.8 % of CCl4 emissions from Eastern China, 5.6 +/- 2.5 % from Eastern Asia, and 2.1 +/- 1.1 % of global emissions. Additionally, this region accounted for 6.3 +/- 2.8 % of the global oceanic absorption of CCl4. These findings underscore the Western Pacific's key role in regulating atmospheric CCl4 concentrations and mitigating its accumulation in Eastern Asia, providing essential data for global VCHCs emission and uptake estimates.
WOS关键词TO-AIR FLUXES ; HALOGENATED ORGANIC-COMPOUNDS ; CARBON-TETRACHLORIDE CCL4 ; EAST CHINA SEA ; YELLOW SEA ; CHLOROFORM EMISSIONS ; SOUTHERN-OCEAN ; LAW CONSTANTS ; RIVER DELTA ; HALOCARBONS
资助项目Innovative Research Group Project of the National Natural Science Foundation of China[42276039] ; Innovative Research Group Project of the National Natural Science Foundation of China[42406040]
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:001608339900001
出版者COPERNICUS GESELLSCHAFT MBH
源URL[http://ir.qdio.ac.cn/handle/337002/203737]  
专题海洋研究所_海洋生态与环境科学重点实验室
通讯作者He, Zhen; Yang, Gui-Peng
作者单位1.Ocean Univ China, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Minist Educ, Qingdao 266100, Peoples R China
2.Qingdao Marine Sci & Technol Ctr, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
4.Ocean Univ China, Inst Marine Chem, Qingdao 266100, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Shan-Shan,Ni, Jie,Song, Jin-Ming,et al. Influence of oceanic ventilation and terrestrial transport on the atmospheric volatile chlorinated hydrocarbons over the Western Pacific[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2025,25(21):14967-14986.
APA Liu, Shan-Shan,Ni, Jie,Song, Jin-Ming,Gao, Xu-Xu,He, Zhen,&Yang, Gui-Peng.(2025).Influence of oceanic ventilation and terrestrial transport on the atmospheric volatile chlorinated hydrocarbons over the Western Pacific.ATMOSPHERIC CHEMISTRY AND PHYSICS,25(21),14967-14986.
MLA Liu, Shan-Shan,et al."Influence of oceanic ventilation and terrestrial transport on the atmospheric volatile chlorinated hydrocarbons over the Western Pacific".ATMOSPHERIC CHEMISTRY AND PHYSICS 25.21(2025):14967-14986.

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来源：海洋研究所

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