Climate change brings about significant changes in the physical environment in the Arctic.
Increasing temperatures, sea ice retreat, slumping permafrost, changing sea ice regimes …

In the past 40 years, atmospheric chemists have come to realize that halogens exert a
powerful influence on the chemical composition of the troposphere and through that …

We present a simulation of the global present-day composition of the troposphere which
includes the chemistry of halogens (Cl, Br, I). Building on previous work within the GEOS …

In this study, we investigate the maximum physical and biogeochemical potential of
macroalgae open-ocean mariculture and sinking (MOS) as an ocean-based carbon dioxide …

The amended and adjusted Montreal Protocol has continued to reduce emissions and
atmospheric abundances of most controlled ozone-depleting substances. By 2012, the total …

Chlorine atoms (Cl) are highly reactive toward hydrocarbons in the Earth's troposphere,
including the greenhouse gas methane (CH4). However, the regional and global CH4 sink …

In contrast to the general stratospheric ozone recovery following international agreements,
recent observations show an ongoing net ozone depletion in the tropical lower stratosphere …

We present a global simulation of tropospheric iodine chemistry within the GEOS-Chem
chemical transport model. This includes organic and inorganic iodine sources, standard gas …

In its latest assessment report the IPCC stresses the need for carbon dioxide removal (CDR)
to counterbalance residual emissions to achieve net zero carbon dioxide or greenhouse gas …

Stratospheric ozone depletion, first observed in the 1980s, has been caused by the
increased production and use of substances such as chlorofluorocarbons (CFCs), halons …