Rapid increase in atmospheric iodine levels in the North Atlantic since the mid-20th century.

摘要: Atmospheric iodine causes tropospheric ozone depletion and aerosol formation, both of which have significant climate impacts, is an essential dietary element for humans. However, the evolution atmospheric levels at decadal centennial scales unknown. Here, we report concentrations in RECAP ice-core (coastal East Greenland) to investigate how North Atlantic evolved over past 260 years (1750–2011), this being longest record Northern Hemisphere. The tripled from 1950 2010. Our results suggest that increase driven by anthropogenic pollution enhanced sub-ice phytoplankton production associated with recent thinning Arctic sea ice. Increasing has accelerated loss considerably transport deposition Hemisphere continents. Future forcing may continue amplify oceanic emissions potentially health environmental impacts global scale.