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Sources and Emissions of Marine-Derived Halocarbons Over the Coastal and Open Ocean of the Northwest Pacific

文献类型：期刊论文

作者Liu, Shan-Shan4,5,6; Bai, Yi-Ning3; Ni, Jie5,6; He, Zhen2,5,6; Yang, Gui-Peng1,2,5,6
刊名JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
出版日期2025-06-16
卷号130期号:11页码:19
关键词methyl halides China seas northwest Pacific source
ISSN号2169-897X
DOI10.1029/2024JD042706
通讯作者He, Zhen(zhenhe@ouc.edu.cn)
英文摘要The spatial variability and sources of atmospheric methyl halides (CH3Cl, CH3Br, and CH3I) over the northwest Pacific and its marginal seas-the East China Sea (ECS) and South China Sea (SCS)-were comprehensively characterized from 2017 to 2020. This study represents the first large-scale investigation of these compounds across coastal and open-ocean environments. Atmospheric CH3Cl and CH3Br concentrations were substantially elevated in the ECS and SCS, exceeding Northern Hemisphere background levels by 12%-28%, whereas concentration enhancements over the northwest Pacific were 3%-5%. Elevated CH3Cl and CH3Br concentrations were attributed to long-range terrestrial atmospheric transport from China, Korea, Japan, and the Philippines, as well as localized phytoplankton-driven production in nutrient-rich coastal waters. In contrast, CH3I concentrations were primarily controlled by photochemical processes mediated by dissolved organic carbon (DOC), with elevated levels being observed in the oligotrophic subtropical northwest Pacific (10 degrees-30 degrees N). Multiple regression analyses revealed that CH3Cl and CH3Br distributions were mainly influenced by terrestrial transport in coastal areas, whereas oceanic processes dominated their distributions in the open ocean. CH3I distributions primarily reflected oceanic photochemical production, with marginal terrestrial influence limited to the ECS. The production rates of CH3Br and CH3Cl in the ECS and SCS, respectively, were 2-3 times higher than those in the northwest Pacific, consistent with enhanced biological activity. Sea-to-air flux estimates demonstrated that the northwest Pacific and its marginal seas acted as net sources of all three methyl halides, with fluxes generally exceeding global averages by approximately 1.5-48 times. These findings underscore the importance of the study area to the atmospheric methyl halides budget.
WOS关键词METHYL-BROMIDE EMISSIONS ; RIVER DELTA REGION ; SURFACE SEAWATER ; SPATIOTEMPORAL DISTRIBUTIONS ; NONMETHANE HYDROCARBONS ; ORGANIC-COMPOUNDS ; EAST CHINA ; IODIDE ; AIR ; SEA
资助项目National Natural Science Foundation of China ; Natural Science Foundation of Shandong Province[ZR2021MD034] ; Taishan Scholars Project Special Fund Support[tspd20240805] ; Taishan Scholars Project Special Fund Support[41849909] ; [42276039] ; [42406040]
WOS研究方向Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:001503226800001
出版者AMER GEOPHYSICAL UNION
源URL[http://ir.qdio.ac.cn/handle/337002/202187]  
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
作者单位1.Ocean Univ China, Inst Marine Chem, Qingdao, Peoples R China
2.Qingdao Marine Sci & Technol Ctr, Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China
3.China Univ Petr, Coll Oceanog & Space Informat, Qingdao, Peoples R China
4.Chinese Acad Sci, Key Lab Marine Ecol & Environm Sci, Inst Oceanol, Qingdao, Peoples R China
5.Ocean Univ China, Key Lab Marine Chem Theory & Technol, Minist Educ, Qingdao, Peoples R China
6.Ocean Univ China, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Minist Educ, Qingdao, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Shan-Shan,Bai, Yi-Ning,Ni, Jie,et al. Sources and Emissions of Marine-Derived Halocarbons Over the Coastal and Open Ocean of the Northwest Pacific[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2025,130(11):19.
APA Liu, Shan-Shan,Bai, Yi-Ning,Ni, Jie,He, Zhen,&Yang, Gui-Peng.(2025).Sources and Emissions of Marine-Derived Halocarbons Over the Coastal and Open Ocean of the Northwest Pacific.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,130(11),19.
MLA Liu, Shan-Shan,et al."Sources and Emissions of Marine-Derived Halocarbons Over the Coastal and Open Ocean of the Northwest Pacific".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 130.11(2025):19.

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来源：海洋研究所

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