FrontMatter -- Acknowledgments -- Contents -- Figures, Tables, and Boxes -- Summary -- 1 Introduction -- 2 Key Variables to Monitor in the Long Term -- 3 Arctic Observations: Existing Activities and Gaps -- 4 Data Management -- 5 Designing the Network -- 6 Detailed Implementation Ideas -- 7 Overarching Recommendations -- References -- Appendixes -- A Contributors List -- B Biographical Sketches of Committee Members and Staff -- C Acronyms and Abbreviations.