Front Matter -- Preface -- Contents -- Summary -- 1 Introduction -- 2 Contributions of the Atmospheric Sciences to the National Well-Being -- 3 Scientific Imperatives and Recommendations for the Decades Ahead -- 4 Leadership and Management Challenges in the Decades Ahead -- PART II 1 Atmospheric Physics Research Entering the Twenty-First Century1 -- PART II 2 Atmospheric Chemistry Research Entering the Twenty-First Century1 -- PART II 3 Atmospheric Dynamics and Weather Forecasting Research Entering the Twenty-First Century1 -- PART II 4 Upper-Atmosphere and Near-Earth Space Research Entering the Twenty-First Century1 -- PART II 5 Climate and Climate Change Research Entering the Twenty-First Century1 -- References -- APPENDIX A Acronyms and Abbreviations -- APPENDIX B Listing of Reports of the Committee on Atmospheric Sciences and the Board on Atmospheric Sciences and Climate Since 1958 -- Index.