Appendix A
Statement of Task

An ad hoc committee will plan a workshop to bring together experts for discussions on the future of observing and modeling the boundary layer, including consideration of mature or new in situ and ground-based, airborne, and satellite remote sensing technologies and cutting edge innovations that could be particularly useful in advancing our understanding. Workshop attendees will be asked to:

1. examine our understanding of atmospheric boundary layer processes and interactions with land, ocean, and ice surfaces and science drivers, from observation, modeling, and data assimilation perspectives;
2. discuss key observing and modeling gaps and the science that could be accomplished by filling those gaps;
3. consider how new observing capabilities (including targeted field campaigns) can leverage the existing surface and boundary layer observational networks and where advances in satellite remote sensing could be most beneficial;
4. consider frontiers in technology, innovation, and partnerships (e.g., optics and photonics sensor development) that would expand current capabilities (e.g., ground-based lidar and microwave radiometer profiles) and build on existing networks;
5. discuss strategies for technology development to reduce cost and improve data quality; and
6. discuss ways to foster communication between user and technology development communities to develop increased collaboration opportunities that could help rapidly advance the science.

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