The Aerosol, Cloud, Convection and Precipitation (ACCP) study is assessing designs for NASA's next suite of atmospheric observations. The goal is to optimize how we examine links among tiny particles known as "aerosols," clouds, atmospheric convection, and precipitation. ACCP will deliver key data for improved forecasts of weather, air quality and climate. How? By providing unmatched insight into the vertical structure of our atmosphere with observations from space, our skies, and on the ground.
ACCP will make the first-ever global measurements from space that reveal how ice and water move vertically within clouds. Not only that, it will reveal how such motion is tied to natural and human-made aerosols. Understanding how air rises and sinks will improve our knowledge of Earth's storms, rain and snow produced by them, and the effects of weather on air quality.
ACCP will make the first-ever global measurements that directly link clouds' physical properties to how they transfer heat. We will also connect such heat transfer to radiation in our atmosphere. All of which is needed to understand climate feedbacks, climate sensitivity and changes in Earth's water cycle.
The ACCP study team includes several NASA Centers and space agencies in Japan, France, Canada, and Germany. They are also working with universities in the U.S. and abroad. This large group has identified a range of science objectives and a suite of observations needed to meet them.
ACCP established a system design – or "architecture" – for the mission following a rigorous review in terms of scientific value, estimated cost, and technical readiness.
6th AOS Community Forum (November 4, 2021)
1st Science Quarterly (October 25-28, 2021)
Mission Concept Review (mid-April 2022)
Key Decision Point (KDP) A (late May 2022)
NASA's new Earth System Observatory (ESO) will provide key information related to climate change, natural hazard mitigation, fighting forest fires, and improving real-time agricultural processes.
ACCP will address two of the five ESO areas of focus including:
- Aerosols: Answering the critical question of how aerosols determine air quality and affect the global energy balance, a key source of uncertainty in predicting climate change.
- Cloud, Convection, and Precipitation: Tackling one of the largest sources of uncertainty in future projections of climate change and targeting processes that influence the prediction of severe weather.