Overview of Climate Forcing Research Strategy at PNNL

William Shaw Pacific Northwest National Laboratory
Jerome Fast Pacific Northwest National Laboratory
Steven Ghan Pacific Northwest National Laboratory
Sally McFarlane U.S. Department of Energy

Category: Aerosol-Cloud-Radiation Interactions

Working Group: Aerosol Life Cycle

The Atmospheric System Research (ASR) science focus area at PNNL is an integrated research program designed to address key uncertainties in the physical processes that control the effects of clouds and aerosols on the climate system. The program comprises three principal objectives that address the aerosol life cycle, cloud-aerosol interactions, and cloud radiative forcing and feedback. The overall objective for the aerosol life cycle is to improve the understanding and representation of how the life cycle of aerosols determines the distribution of aerosols and their radiative and microphysical properties. For cloud-aerosol interactions it is to improve understanding and representation of how cloud processes influence aerosol properties and how aerosols influence the radiative and microphysical properties of various types of clouds. Cloud-radiative forcing and feedback seeks to improve understanding and representation of the processes controlling the formation, structure, radiative and microphysical properties, and dissipation of cirrus and shallow clouds associated with convective cloud systems. These objectives are addressed in a framework that joins field and laboratory measurements with process, regional, and climate models. This poster will provide an overview of the ASR research effort at PNNL, describe the relationships between the three principal objectives, and highlight initial-year tasks currently underway.

This poster will be displayed at ASR Science Team Meeting.