Aerobic oxidation of methane significantly reduces global diffusive methane emissions from shallow marine waters.

Autor:	Mao SH; Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China.; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China., Zhang HH; Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China.; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China., Zhuang GC; Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China. zgc@ouc.edu.cn.; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China. zgc@ouc.edu.cn.; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China. zgc@ouc.edu.cn., Li XJ; Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China.; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China., Liu Q; Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China.; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China., Zhou Z; Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China.; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China., Wang WL; State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China., Li CY; College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, 266100, China., Lu KY; Department of Earth Sciences, University College London, London, WC1E 6BS, UK., Liu XT; College of Marine Geosciences, Ocean University of China, Qingdao, 266100, China., Montgomery A; Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT, 59717, USA., Joye SB; Department of Marine Sciences, University of Georgia, Athens, GA, 30602, USA., Zhang YZ; College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, 266100, China.; Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, China., Yang GP; Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China. gpyang@mail.ouc.edu.cn.; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China. gpyang@mail.ouc.edu.cn.; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China. gpyang@mail.ouc.edu.cn.
Jazyk:	angličtina
Zdroj:	Nature communications [Nat Commun] 2022 Nov 27; Vol. 13 (1), pp. 7309. Date of Electronic Publication: 2022 Nov 27.
DOI:	10.1038/s41467-022-35082-y
Abstrakt:	Methane is supersaturated in surface seawater and shallow coastal waters dominate global ocean methane emissions to the atmosphere. Aerobic methane oxidation (MOx) can reduce atmospheric evasion, but the magnitude and control of MOx remain poorly understood. Here we investigate methane sources and fates in the East China Sea and map global MOx rates in shallow waters by training machine-learning models. We show methane is produced during methylphosphonate decomposition under phosphate-limiting conditions and sedimentary release is also source of methane. High MOx rates observed in these productive coastal waters are correlated with methanotrophic activity and biomass. By merging the measured MOx rates with methane concentrations and other variables from a global database, we predict MOx rates and estimate that half of methane, amounting to 1.8 ± 2.7 Tg, is consumed annually in near-shore waters (<50 m), suggesting that aerobic methanotrophy is an important sink that significantly constrains global methane emissions. (© 2022. The Author(s).)
Databáze:	MEDLINE
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