The global oxygen budget and its future projection

查看全文 作　　者：Jianping [1]Huang;Jiping [2]Huang;Xiaoyue [1]Liu;Changyu [1]Li;Lei [1]Ding;Haipeng [1]Yu

机构地区：[1]Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, Lanzhou University, Lanzhou 730000, China;[2]Enlightening Bioscience Research Center, Mississauga L4X 2X7, Canada

出　　处：《Science Bulletin》索引2018年第63卷第18期,共7页

基　　金：supported by the National Natural Science Foundation of China (41521004);the China University Research Talents Recruitment Program (111 project, B13045) 摘　　要：Atmospheric oxygen (O_2 ) is the most crucial element on earth for the aerobic organisms that depend on it to release energy from carbon-based macromolecules. This is the first study to systematically analyze the global O_2 budget and its changes over the past 100 years. It is found that anthropogenic fossil fuel combustion is the largest contributor to the current O_2 deficit, which consumed 2.0 Gt/a in 1900 and has increased to 38.2 Gt/a by 2015. Under the Representative Concentration Pathways (RCPs) RCP8.5 scenario, approximately 100Gt (gigatonnes) of O_2 would be removed from the atmosphere per year until 2100,and the O_2 concentration will decrease from its current level of 20.946%to 20.825%. Human activities have caused irreversible decline of atmospheric O_2 . It is time to take actions to promote O_2 production and reduce O_2 consumption. 关键词：未来设计氧气预算燃料燃烧 O2 有机体大分子不可逆

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The global oxygen budget and its future projection

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