In Karl, 1996. Atmospheric ozone concentration between 60S and 60N given as a percentage of the historic monthly average. Our Changing Planet , 1966. The particular composition of the aerosol determines whether the aerosol primarily scatters absorbs radiation. Mineral dust, desert dust and sea salt must also be included if human induced and natural direct effects are to be distinguished.
Aerosols also affect the Earth's radiation balance through their effects on clouds.
Changes in the concentration of aerosols that act as CCN can therefore lead to changes in the number of drops present in clouds. DMS is an efficient condensation nucleus and is thought to be capable of modifying cloud microphysical processes and thereby climate. The atmospheric concentrations of DMS is relatively unknown. Unlike some of the long lived greenhouse gases aerosol centrations and distributions tend to be much more variable in time and space. Volcanic eruptions also inject huge amounts of aerosol and particulate matter into the troposphere and stratosphere which have a 5 to 10 years and longer impact on the climate system.