FrontMatter -- Preface -- Acknowledgments -- Contents -- Summary -- 1 Introduction -- 2 Rationale for Continued Arctic Research -- 3 Emerging Questions -- 4 Meeting the Challenges -- 5 Building Knowledge and Solving Problems -- References -- Appendix A: Acronyms and Abbreviations -- Appendix B: Speaker and Interviewee Acknowledgments -- Appendix C: Summary of Questionnaire Responses -- Appendix D: Biographical Sketches of Committee Members.