Atmospheric History of H 2 Over the Past Century Reconstructed From South Pole Firn Air
Atmospheric History of H 2 Over the Past Century Reconstructed From South Pole Firn Air
复制标题
从南极冷杉空气重建过去一个世纪 H 2 的大气历史
DOI：
10.1029/2020gl087787
复制
发表时间：
2020
影响因子：
5.2
通讯作者：
Saltzman, E. S.
中科院分区：
文献类型：
--
作者：
Patterson, J. D.;Aydin, M.;Crotwell, A. M.;Petron, G.;Severinghaus, J. P.;Saltzman, E. S.
分子氢（H2）是地球大气中丰富且活跃的成分，与气候和空气质量有关。随着H2as作为能源的使用增加，预计H2as的人为排放将会增加。记录过去大气中h2o2的变化将有助于验证当前对全球H2budget的理解。现代器乐唱片始于20世纪80年代；在此之前，关于大气中h2h的信息很少。在这里，我们使用2001年南极活动的固定空气测量数据来重建20世纪的大气h2level。测量数据的反演表明，南极上空的硫化氢从1910年到2000年从350-540 ppb增加。生物地球化学盒模型表明，在此期间，大气中h2o2的负荷增加了37%。h2o2的增加与化石燃料燃烧产生的h2o2排放量的增加和甲烷氧化产生的大气h2o2排放量的增加是一致的。
Molecular hydrogen (H2) is an abundant and reactive constituent of Earth's atmosphere, with links to climate and air quality. Anthropogenic emissions of H2are expected to rise as the use of H2as an energy source increases. Documenting past variations in atmospheric H2will help to validate current understanding of the global H2budget. The modern instrumental record begins in the 1980s; there is little information about atmospheric H2prior to that time. Here, we use firn air measurements from a 2001 South Pole campaign to reconstruct atmospheric H2levels over the 20th century. Inversion of the measurements indicates that H2over South Pole has increased from 350–540 ppb from 1910–2000. A biogeochemical box model indicates that the atmospheric burden of H2increased by 37% over that time. The rise in H2is consistent with increasing H2emissions from fossil fuel combustion and increasing atmospheric production from methane oxidation.