Climate Change and Air Quality Research Program-Providing a scientific basis toward global stabilization-

We aim for a prompt verification of the reduction in GHGs (greenhouse gases) and SLCFs (short-lived climate forcers) emissions by quantitative evaluations of the emissions inventories at the national and city levels. Furthermore, we will improve the accuracy of hindcast and forecast of the changes and variability of climate and air quality by the state-of-art modeling that takes into account the latest emission estimates. Overall, we will provide the scientific basis that is necessary to make policy decisions, such as mitigation measures, to achieve the long-term goal of net-zero GHG emissions by 2050.

The program consists of three projects (PJs) and will focus on the following specific areas.

We will estimate global GHG emissions and uptake by unified, neutral, and objective methods, by making the best use of the data obtained from ground-based, ship, aircraft, and satellite observations.

We will challenge the development of new methods to estimate GHG and SLCF (Short-Lived Climate Forcers) emissions on the national and city scales by expanding the capability of ground-based, ship, aircraft, and satellite observations.

We will improve the accuracy of the simulation and projection of the changes in climate and air quality by the state-of-art modeling that takes into account the latest emission estimates, and assess the processes involving clouds, precipitation, atmospheric chemistry, and stratospheric ozone.

We will aim to clarify the scientific basis and constraints for the stabilization of climate and air quality by pursuing the understanding of atmospheric processes, emissions verifications, and future projections, and contribute to the achievement of the long-term goals of the Paris Agreement.

SII-8 Comprehensive Study on Multi-scale Monitoring and Modeling of Greenhouse Gas Budgets