目前的二氧化碳ppm上升已经被证明是由人类活动引起的吗?- 江南体育网页版- - - - -地球科学堆江南电子竞技平台栈交换 最近30从www.hoelymoley.com 2023 - 07 - 10 - t13:13:57z //www.hoelymoley.com/feeds/question/17764 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/17764 7 目前的二氧化碳ppm上升已经被证明是由人类活动引起的吗? Greendrake //www.hoelymoley.com/users/17602 2019 - 08 - 17 - t07:42:34z 2019 - 08 - 25 - t20:41:35z < p >大气中二氧化碳水平的上升大约从< a href = " https://www.co2.earth/ " rel = " noreferrer " > < / > 300 - 400 ppm在过去的60年。< / p > < p >有什么可靠的计算表明,这种上升是由人类活动引起的吗?我正在寻找类似“X数百万音调的煤油燃烧1980年和2010年之间产生Y音调影响的二氧化碳增加数百万Z ppm的二氧化碳在大气中”。< / p > //www.hoelymoley.com/questions/17764/has-the-present-rise-of-co2-ppm-been-proved-to-be-caused-by-human-activity/17768 # 17768 6 由基思·麦克回答当前二氧化碳ppm的崛起已经被证明是由人类活动引起的吗? 基思·麦克 //www.hoelymoley.com/users/6535 2019 - 08 - 17 - t16:51:44z 2019 - 08 - 25 - t20:41:35z < p > < a href = " https://i.stack.imgur.com/zp9ae.png " rel = " nofollow noreferrer " > < img src = " https://i.stack.imgur.com/zp9ae.png " alt = "在这里输入图像描述" > < / > < / p > < p > < a href = " https://www.epa.gov/ghgemissions/global-greenhouse-gas-emissions-data " rel = " nofollow noreferrer " >美国环保署< / > < / p > < p >的一些碳进入海洋和土壤:< / p > < p > < a href = " https://i.stack.imgur.com/LIGbs.jpg " rel = " nofollow noreferrer " > < img src = " https://i.stack.imgur.com/LIGbs.jpg " alt = "在这里输入图像描述" > < / > < / p > < p > < a href = " https://en.wikipedia.org/wiki/Carbon_cycle " rel = " nofollow noreferrer " >维基百科< / > < / p > < p >累计贡献大气的浅蓝色区域的面积是这个图表。< a href = " https://i.stack.imgur.com/BF7m6.png " rel = " nofollow noreferrer " > < img src = " https://i.stack.imgur.com/BF7m6.png " alt = "在这里输入图像描述" > < / > < a href = " https://www.carbonbrief.org/what -全球二氧化碳排放- 2016 -意味着气候变化“rel = " nofollow noreferrer " > CarbonBrief < / >, Le Quere et al。(< a href = " https://doi.org/10.5194/essd - 8 - 605 - 2016“rel = " nofollow noreferrer " > 2016 < / > < / p > //www.hoelymoley.com/questions/17764/has-the-present-rise-of-co2-ppm-been-proved-to-be-caused-by-human-activity/17775 # 17775 3 答案由Greendrake目前上升的二氧化碳ppm被证明是由人类活动引起的? Greendrake //www.hoelymoley.com/users/17602 2019 - 08 - 18 - t00:26:06z 2019 - 08 - 18 - t00:26:06z < p >按答案@KeithMcClary,气氛变得4额外每年数十亿吨的碳从人类活动。< / p > < p >假设所有碳以二氧化碳的形式,它的质量将会是:4 * (c < em > < / em > + < em > o < / em > * 2) / < em > < / em >, < em > c < / em >是碳的原子质量(12),< em > o < / em >是一个氧气(16)。这使得约14.7数十亿吨二氧化碳。< / p > < p >大气的总重量是5750000000000000吨(从< a href = " https://wgntv.com/2018/06/26/1240332/ " rel = " nofollow noreferrer " > < / >)。通过简单的部门约2.56 ppm,这对应于100 ppm增加60年来(鉴于当时年增幅明显低于2.56 ppm我们有这些天)。< / p > //www.hoelymoley.com/questions/17764/has-the-present-rise-of-co2-ppm-been-proved-to-be-caused-by-human-activity/17820 # 17820 7 答案由jeffronicus目前上升的二氧化碳ppm被证明是由人类活动引起的? jeffronicus //www.hoelymoley.com/users/7314 2019 - 08 - 22 - t22:53:13z 2019 - 08 - 22 - t22:53:13z < p >可能是最强大的人类不断上升的二氧化碳水平上的“指纹”来自碳同位素比值的变化。< / p > < p >基本上有三种同位素碳-碳原子与不同重量的中子——碳12,碳13,碳14。碳12和碳13是稳定的和大部分的碳在生物和大气。(我套用< a href = " https://www.acs.org/content/acs/en/education/whatischemistry/landmarks/keeling-curve.html isotopic-fingerprints-and-the-carbon-cycle”rel = " noreferrer " > < / >美国化学学会讨论。)碳14(主要)创建当宇宙射线撞击大气中的氮原子;它是更少的陈述和半衰期为5730年。所有三种形式的表现几乎相同的化学反应和环境。植物和动物使用碳作为构建块和积累结构这三种同位素。< / p > < p >现在还活着的事情积累碳同位素的比率一样他们可用的环境;植物或动物死后,他们停止积累碳碳和碳14的结构分解根据其半衰期,这是研究人员做碳测定年代古老的材料。< / p > < p >这意味着非常古老的碳浓度,比如石油和煤炭,含有很少或根本没有碳14,只是碳12和碳13。 When you burn these materials, the combustion process forms carbon dioxide, and the carbon in those CO2 molecules will be carbon-12 and carbon-13. Thus, you can sample the atmosphere, analyze the mix of isotopes, and determine how much of the CO2 comes from fossil sources.

The rise in CO2 is unambiguously caused by human activity, principally fossil-fuel burning. This is clear from the numbers: We know how much fossil fuel is converted into CO2 each year and emitted into the atmosphere. -- Scripps Institution of Oceanography geochemist Ralph Keeling

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