Andrew Gettelman, Scientist III
Cloud Microphysics and Aerosol Indirect Effects
I am working with colleagues to investigate the role of aerosols in climate and how they affect cloud radiative properties using advanced cloud microphysics and aerosols in the NCAR Community Atmosphere Model. See my publications page for more details.
Ice Microphysics and Ice Supersaturation
Much of my work on cloud microphysics has focused on the ice phase and ice supersaturation in the atmosphere. Ice and mixed phase clouds are important for the planetary radiation balance, and critical for understanding the evolution of Arctic climate. Recent work of myself and collaborators is focusing on ice and on the Arctic. More details on my publications page and Vita.
Climate Modeling and Climate Feedbacks
As part of my work in the Atmospheric Modeling and Predictability Section at NCAR, I am actively engaged in trying to improve model formulations of physical processes, especially cloud processes. Most of my work has focused on understanding cloud microphysics, including the representation of ice clouds.
Climate, Water Vapor and the Tropical Tropopause Layer
Currently most of my research concerns the exchange of air and water vapor across the tropopause. Several recently submitted papers concerning the tropical tropopause region are available on my publications page. I am also a co-investigator in the NASA Airborne Tropical Tropopause Experiment (ATTREX) campaign.
Climate Impacts of Contrails
I am working on an Federal Aviation Administration (FAA) funded project to better estimate the climate impact of cirrus clouds. More general details on avation's effect on the atmosphere are available in the IPCC special report Aviation and the Global Atmosphere.