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Appendix A Statement of Task The National Academy of Sciences is helping facilitate the increased involvement of scientists in answering questions related to climate, energy, and environmental change. The goal is both to advance scientific understanding of global climate and other environmental and disaster-related phenomena, and consider the implications for both fundamental scientific understanding and national security. For this particular activity, The National Academy of Sciences/National Research Council will form a small ad hoc committee of experts to assess the scientific value and usefulness of Imagery Derived Products on Arctic sea ice and identify the images that would be most valuable to Arctic ice research if publicly released. The panel will carry out the following tasks:  Evaluate the collection of Arctic Ice Imagery Derived Products, a subset of the Global Fiducial Program data from U.S. National Imagery Systems, and assess their scientific value and usefulness in furthering the understanding of important climate parameters and processes.  Identify those images from the Arctic Ice fiducials (observation sites) that would be most valuable to arctic ice research if released for open use. The analysis should identify the high priority images, explain why they are important, and describe what could be done with the data if such images were openly available. 31