Slowing down of the global accumulation of atmospheric methane during the 1980s
Slowing down of the global accumulation of atmospheric methane during the 1980s
复制标题
20 世纪 80 年代全球大气甲烷积累放缓
作者：
L. Steele;L. Steele;L. Steele;E. Dlugokencky;E. Dlugokencky;P. M. Lang;P. Tans;R. Martin;K. Masarie
对现代空气1 -8和冰芯中空气中甲烷的测量令人信服地表明，自工业革命以来，大气中甲烷的丰度一直在上升。这是一个令人关切的问题，因为甲烷在决定大气的辐射平衡和化学组成方面发挥着重要作用13。由于我们对大气甲烷全球预算14及其如何随时间变化的理解存在不确定性，导致这种增加的原因尚未明确确定。在这里，我们报告的测量大气中的甲烷从一个广泛的全球网络的烧瓶采样点，这表明，虽然甲烷继续积累在大气中，有一个显着放缓的全球积累速度在1983年和1990年之间。如果这种减速持续下去，全球甲烷浓度将在2006年左右达到最高值。我们的研究结果表明，在纬度带30-90° N的甲烷排放量的变化可能是特别重要的这一趋势。
MEASUREMENTS of methane in modern air1–8 and in air trapped in ice cores9–12 have shown convincingly that the abundance of atmospheric methane has been rising since the Industrial Revolution. This is a matter of concern because of the important role of methane in determining the radiative balance and chemical composition of the atmosphere13. The causes of this increase have not been identified unambiguously because of uncertainties in our understanding of the global budget of atmospheric methane14 and in how it is changing with time. Here we report on measurements of atmospheric methane from an extensive global network of flask sampling sites, which reveal that, although methane continues to accumulate in the atmosphere, there has been a substantial slowing of the global accumulation rate between 1983 and 1990. If this deceleration continues steadily, global methane concentrations will reach a maximum around the year 2006. Our results hint that changes in methane emissions in the latitude band 30–90° N may be of particular significance to this trend.
影响因子：
4.4
作者：
THONING, KW;TANS, PP;KOMHYR, WD
通讯作者：
KOMHYR, WD