Peter V. Hobbs Memorial Endowed Lecture in Experimental Meteorology
Professor Greg McFarquhar
May 21, 2010
3:30-4:50, Johnson Hall, Room 075
Dr. Greg M. McFarquhar
Professor, Department of Atmospheric Sciences, University of Illinois at Urbana-Champaign
Lecture: "Use of In-situ Observations to Examine Aerosol Impacts on Mixed-Phase Arctic Clouds, Radiation and Climate"
Abstract
Comprehensive data on arctic boundary layer aerosol and cloud microphysical and radiative properties were collected during the 2004 Mixed-Phase Arctic Cloud Experiment (M-PACE) and the 2008 Indirect and Semi-Direct Aerosol Campaign (ISDAC). During M-PACE, data from in-situ microphysical sensors were collected that characterize how cloud particle shape, size, phase and bulk properties varied with height. A much more comprehensive dataset was obtained during ISDAC, in which an unprecedented suite of 42 cloud and aerosol instruments was employed to study the influence of aerosols on clouds affected by ice. In-situ data obtained during ISDAC above, below, and within single-layer stratus are leading to a process-oriented understanding of how aerosols affect the microphysical and radiative properties of arctic clouds. Ultimately these data will be used to improve the representation of cloud and aerosol processes in models covering a variety of spatial andd temporal scales, and to determine the extent to which long-term surface-based measurements can provide retrievals of aerosols, clouds, precipitation, and radiative heating in the Arctic.
About the Speaker
Dr. McFarquhar is a leading authority on Cloud Physics, especially the physics of ice particles in clouds. In the tradition of Peter Hobbs, McFarquhar has led many field experiments using aircraft to make detailed measurements in clouds. His scholarship and teaching have been honored by the University of Illinois and the Canadian Meteorological and Oceanographic Society.
Peter V. Hobbs Memorial Endowed Lecture in Experimental Meteorology
Sir Keith A. Browning
Friday, October 24, 2008
Inaugural Lecture
Dr. Keith A. Browning
FRS, Emeritus Professor, University of Reading
Lecture: "Origins of the Most Damaging Winds in Extra-Tropical Cyclones"
About the Speaker
Dr. Browning served as the Director of Research in the UK Met Office. He is a Fellow of the American Meteorological Society, receiving the Rossby Medal in 2003, Past President of the Royal Meteorological Society, receiving the Symons Gold Medal in 2001, and a Fellow of the Royal Society. His work with Frank Ludlam on the supercell thunderstorm at Wokingham, UK in 1962 was the first detailed study of such a storm. His research covered many areas of mesoscale meteorology including developing the theory of the Sting jet.
Post-Lecture Reception
Inaugural reception on October 24, 2008, at Kane Hall.
Stephen Hobbs (left), Ann and Keith Browning, Sylvia Hobbs (right).
Photo: D. Hartmann