Coordinated US initiative on Emissions Research Welcome! Thank you all for taking time to start this dialogue A. R. Ravishankara, ESRL/CSD, NOAA.

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Presentation transcript:

Coordinated US initiative on Emissions Research Welcome! Thank you all for taking time to start this dialogue A. R. Ravishankara, ESRL/CSD, NOAA

Quantitative emission information is needed for: o Accounting for the past o Observing and calculating the present o Predicting and projecting the future o Taking action for mitigation, adaptation, etc. o Making choices: Which “knob” to turn? One better than the other? Emissions Impacts Global RegionalLocal Knobs: Atmospheric Composition Actions and decisions are about emissions

Process understanding and emission quantification are inseparable Processes Sources Precursors Abundance composition Radiative Forcing/  O 3 / Health effects Properties/ Processes Climate/  O 3 / Air Quality Chemistry, other factors (including policy) Transformation and transport ESSENTIAL for policy Emissions Radiative Forcing/ Health Effects Influence of external factors Follows from process understanding To define current and predict future concentrations of species Actions taken by people. Changes occurring due to other changes (e.g., climate, land use change, forestation, etc.)

Emissions are key for atmospheric chemistry Emissions Depositio n Chemical Transformations Chemical Transformations Meteorology and dynamics Separation essential - almost different disciplines!

Emission Quantification  Needed for decision support information  Rapid changes in technology and fuel usage in the near future (urgency and opportunity)  Needed for multiple issues and compatibility for multiple uses- climate, air quality, …  Direct usable information product- in addition to other uses

Multiple needs, approaches, and results Needs of different communities have to be, and are, different! Approaches used should fit the needs- differences exist and will exist The results of of the differing needs and approaches will be different Multiple needs:  Regulatory needs  Economic issues (e.g., cap and trade)  Science needs Detailed Chemistry Initialization for predictions Baselines for projections …..  Other needs How best can we come together to optimize the system for the US and the world? Understand needs and requirements of all Understand what is already being done

Start of a journey Quantified emissions inventory will take heart, brain, and ways to find ourselves! Start small …. Produce some thing tangible…. Build on what others have, and are already, doing