Chemical Oceanography, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany.
Environ Sci Process Impacts. 2020 Mar 1;22(3):679-707. doi: 10.1039/c9em00599d. Epub 2020 Mar 12.
The organic bromine compounds bromoform (CHBr) and dibromomethane (CHBr) influence tropospheric chemistry and stratospheric ozone depletion. Their atmospheric abundance is generally related to a common marine source, which is not well characterized. A cruise between the three Macaroenesian Archipelagos of Cape Verde, the Canaries and Madeira revealed that anthropogenic sources increased oceanic CHBr emissions significantly close to some islands, especially at the Canaries, while heterotrophic processes in the ocean increased the flux of CHBr from the sea to the atmosphere in the Cape Verde region. As anthropogenic disinfection processes, which release CHBr in coastal areas increase, and as more CHBr may be produced from increased heterotrophy in a warming, deoxygenated ocean, both sources could supply higher fractions of stratospheric bromine in the future, with yet unknown consequences for stratospheric ozone.
有机溴化合物三溴甲烷（CHBr）和二溴甲烷（CHBr）会影响对流层化学和平流层臭氧消耗。它们在大气中的丰度通常与一个共同的海洋来源有关，但这个来源还没有很好地被描述。在佛得角、加那利群岛和马德拉群岛这三个马卡罗尼西亚群岛之间的一次航行中发现，人为来源在靠近一些岛屿的地方显著增加了海洋 CHBr 的排放，特别是在加那利群岛，而海洋中的异养过程增加了 CHBr 从海洋向大气的通量在佛得角地区。随着沿海地区人为消毒过程释放 CHBr 的增加，以及随着变暖、缺氧的海洋中异养作用的增加可能产生更多的 CHBr，这两个来源都可能在未来为平流层提供更高比例的溴，对平流层臭氧造成未知的后果。
