Improve understanding of the changing atmospheric composition of long-lived greenhouse gases and short-lived climate pollutants.
NOAA will improve understanding of changes in atmospheric composition to assess the climate forcings, sensitivities, and feedbacks of both long-lived greenhouse gases (e.g., CO2, N2O, CFCs) and short-lived climate pollutants (e.g., aerosols, tropospheric ozone) and associated uncertainties. Improved measurements and analyses of the trends and distributions, sources, transport, chemical transformation, and fate of these climate-forcing agents will lead to more skilled models, which will yield better predictions and projections of future climate and its impacts at local, regional, and global scales. Due to their multiple roles in the atmosphere, an improved understanding of these climate-forcing agents and the processes that influence their distributions will yield additional benefits for reducing air quality degradation and recovery of stratospheric ozone layer.
- Quantify emissions of methane, nitrous oxide and black carbon, and assess the effects of black carbon and organic aerosols on clouds R
- Reduce uncertainty of North American CO2 flux estimates by 1% R
- Evaluate the effects of four replacement compounds for refrigerants, solvents, and blowing agents on climate and on the stratospheric ozone layer R
- Assess the impact of stratospheric ozone incursions on the tropospheric ozone burden (i.e., climate effects) and on surface air quality in different regions of the U.S. R
- Determine the effects of increasing emissions in different regions of the U.S. (e.g. urban emissions, and oil and natural gas development activities emissions) on climate and regional air chemistry R