An ad hoc committee will organize a meeting of leading scientists to discuss progress in sustainability science during the last 15 years, potential opportunities for advancing the research and use of scientific knowledge to support a transition toward sustainability, and challenges specifically related to establishing indicators and observations to support sustainability research and practice. Specific questions to be discussed will include:

• What are the major advances in sustainability science since Our Common Journey was released in 1999, what are the remaining gaps, and what have been critical barriers to progress?
• What progress has been made in establishing sustainability indicators, what are the remaining gaps, and what have been critical barriers to progress?
• What progress has been made in developing models that are appropriate for supporting decisions related to sustainability, what are the remaining gaps, and what have been critical barriers to progress?
• What advances in other areas of science (e.g., observing capabilities, models, technology development, indicator development, social sciences) might be usefully applied to advancing sustainability science?
• How can advances in other frameworks for environmental decision making (e.g., climate adaptation, resilience, early warning systems) inform advances in and be integrated with sustainability science?
• What new efforts might be needed to address the range of needs and opportunities related to sustainability?

The committee will plan and organize the workshop, select and invite speakers and discussants, and moderate the discussions. A brief individually-authored workshop summary will be prepared by a designated rapporteur in accordance with institutional guidelines.