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

Goals

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.

PJ1 Quantitative evaluation of natural and anthropogenic GHG emissions/uptake on a global scale

By making the best use of the data obtained from ground-based, ship-based, aircraft, and satellite observations, we will develop unified, neutral, and objective methods and estimate global GHG emissions and uptake from developed to developing countries associated with different technical levels of inventory preparation and compilation.

PJ2: Quantitative evaluation of anthropogenic SLCF and GHG emissions on a regional, national and city scale

By making the best use of the data obtained from ground-based, ship-based, aircraft, and satellite observations, we will challenge the development of new methods to estimate GHG and SLCF emissions on the national and city scales.

PJ3: Numerical modeling of changes in climate and air quality with enhanced hindcast and forecast capabilities

In addition to the latest emission estimates and evaluations, we will improve the accuracy of the 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 and the latest knowledge on the fundamental processes of microphysics and chemical reactions and on the interactions of the Earth system. We will also assess the processes involving clouds, precipitation, atmospheric chemistry, and stratospheric ozone, and contribute to international scientific activities.

We will implement these projects with a total of 48 research staff (as of the beginning of the new 5-year plan that started in April 2021). We will aim to clarify the scientific basis and constraints by pursuing the understanding of atmospheric phenomena, emissions verifications, and future projections toward the goal to stabilize climate and air quality, as early as possible.