Climate projects based on emissions scenarios for long-lived and short-lived radiatively active gases and aerosols

source: U.S. Climate Change Science Program
"Short-lived gases and particle pollutants — which stay in the atmosphere for just days or weeks — have a greater influence on Earth’s climate than previously thought, according to a new NOAA-led report released today as part of the series of Synthesis and Assessment Reports coordinated by the U.S. Climate Change Science Program. The report also says that while these pollutants are generated locally they will have global climate implications. Such short-lived pollution includes black carbon (soot), low-altitude ozone, nitrates and sulfates. Each type of pollution influences surface temperatures differently — from the cooling influence of sulfate particles, which tend to reflect sunlight, to the warming characteristics of heat-absorbing black carbon."