The editors intend that this book conveys the remarkable variety and fundamental importance of the late Helmut E. Landsberg's many contributions to the science of climatology and its practice over a very productive 55-year career. We thank the distinguished authors for their contributions. We also thank Corinne Preston and Charlene Mann for their invaluable word-processing assistance and preparation of camera-ready copy. Finally, we thank Joshua Holland for permission to reproduce his portrait of Landsberg, and Jeanne Moody for preparation of the index. F. Baer N. L. Canfield J. M. Mitchell Editors vii CONTRmUTORS Ferdinand Baer, Department of Meteorology, University of Maryland, College Park, Maryland, USA Norman L. Canfield, Department of Meteorology, University of Maryland, College Park, Maryland, USA Dennis M. Driscoll, Department of Meteorology, Texas A & M University, College Station, Texas, USA William H. Haggard, Climatological Consulting Corporation, Asheville, North Carolina, USA David M. Ludlum, Founding Editor, Weatherwise, Princeton, New Jersey, USA Thomas F. Malone, St. Joseph College, West Hartford, Connecticut, USA J. Murray Mitchell, National Oceanic and Atmospheric Administration (retired), McLean, Virginia, USA Timothy R. Oke, Department of Geography, University of British Columbia, Vancouver, British Columbia, Canada Joseph Smagorinsky, National Oceanic and Atmospheric Administration (retired), Princeton, New Jersey, USA Hessam Taba, World Meteorological Organization (retired), Geneva, Switzerland Morley Thomas, Atmospheric Environment Service (retired), Downsview, Ontario, Canada. IX OVERVIEW Ferdinand Baer Helmut E.