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The global oxygen budget and its future projection
Science Bulletin ( IF 18.9 ) Pub Date : 2018-08-03 , DOI: 10.1016/j.scib.2018.07.023
Jianping Huang 1 , Jiping Huang 2 , Xiaoyue Liu 1 , Changyu Li 1 , Lei Ding 1 , Haipeng Yu 1
Affiliation  

Atmospheric oxygen (O2) 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 O2 budget and its changes over the past 100 years. It is found that anthropogenic fossil fuel combustion is the largest contributor to the current O2 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 O2 would be removed from the atmosphere per year until 2100, and the O2 concentration will decrease from its current level of 20.946% to 20.825%. Human activities have caused irreversible decline of atmospheric O2. It is time to take actions to promote O2 production and reduce O2 consumption.



中文翻译:

全球氧气收支及其未来预测

大气中的氧气 (O 2 ) 是地球上最重要的元素,对于需氧生物来说,依赖它从碳基大分子中释放能量。这是第一项系统分析全球 O 2预算及其在过去 100 年中变化的研究。研究发现,人为燃烧化石燃料是目前 O 2赤字的最大贡献者,1900 年消耗 2.0 Gt/a,到 2015 年增加到 38.2 Gt/a。在代表性浓度途径 (RCP) RCP8.5 情景下,到 2100 年,每年大约有 100Gt(千兆吨)的 O 2从大气中移除,而 O 2集中度将从目前的 20.946% 降至 20.825%。人类活动已经造成大气O 2不可逆转的下降。是时候采取行动促进O 2生产并减少O 2消耗了。

更新日期:2018-08-03
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