AAAR 33rd Annual Conference
October 20 - October 24, 2014
Rosen Shingle Creek
Orlando, Florida, USA
Abstract View
Microscopic Studies of Ice Nucleation
BINGBING WANG, Daniel Knopf, Mary Gilles, Gourihar Kulkarni, Shawn Kathmann, Libor Kovarik, Alexander Laskin, Pacific Northwest National Laboratory
Abstract Number: 596 Working Group: Aerosols, Clouds, and Climate
Abstract Formation of atmospheric ice in clouds can proceed by homogeneous and heterogeneous nucleation. Better understanding of ice nucleation is of critical importance to elucidate fundamental processes of aerosol-ice cloud interactions – one of the most challenging problems for predictive understanding of Earth’s climate change. We develop and apply microscopy approaches for fundamental studies of heterogeneous ice nucleation on atmospheric particles. Hosted by environmental scanning electron microscope, we expand experimental observations of individual ice nucleation events at conditions approaching the upper troposphere/lower stratosphere. Applying multi-modal micro-spectroscopy methods the physicochemical properties of the identified ice nuclei can be characterized. Combined with theoretical chemistry calculations, the experimental data will be analyzed to gain better understanding of ice nucleation and parameterizations for cloud models.