Appendix D

Scientific Questions and Policy Questions for the NARSTO Assessment Document1

SCIENTIFIC QUESTIONS FOR THE NARSTO ASSESSMENT DOCUMENT

  1. What are the most significant research developments in tropospheric ozone science in the past decade?

  2. How does ozone accumulation on urban (< 200 km) and regional (200 - 2000 km) scales depend on the source dimension and location? How does it depend on the relative contribution from urban and regional sources?

  3. What are the most recent assessments of the relative contributions of VOCs, NOx, and CO to ozone accumulation on urban and regional scales in North America?

  4. What are the strengths and limitations of the current scientific methods and tools in assessing tropospheric ozone issues and developing emissions-management strategies?

  5. What approaches are required to determine historical concentration trends of ozone and its precursors on urban and regional scales? What is required to demonstrate the effectiveness of emissions-control strategies over time?

  6. What are the relationships between the control strategies designed to manage tropospheric ozone and those designed to manage other pollutant regimes of interest?

1

The questions are presented in the appendix of the draft document entitled “An Assessment of Tropospheric Ozone Pollution: A North American Perspective” dated December 20, 1998.



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OCR for page 31
REVIEW OF THE NARSTO DRAFT REPORT: AN ASSESSMENT OF TROPOSPHERIC OZONE POLLUTION–A NORTH AMERICAN PERSPECTIVE Appendix D Scientific Questions and Policy Questions for the NARSTO Assessment Document1 SCIENTIFIC QUESTIONS FOR THE NARSTO ASSESSMENT DOCUMENT What are the most significant research developments in tropospheric ozone science in the past decade? How does ozone accumulation on urban (< 200 km) and regional (200 - 2000 km) scales depend on the source dimension and location? How does it depend on the relative contribution from urban and regional sources? What are the most recent assessments of the relative contributions of VOCs, NOx, and CO to ozone accumulation on urban and regional scales in North America? What are the strengths and limitations of the current scientific methods and tools in assessing tropospheric ozone issues and developing emissions-management strategies? What approaches are required to determine historical concentration trends of ozone and its precursors on urban and regional scales? What is required to demonstrate the effectiveness of emissions-control strategies over time? What are the relationships between the control strategies designed to manage tropospheric ozone and those designed to manage other pollutant regimes of interest? 1 The questions are presented in the appendix of the draft document entitled “An Assessment of Tropospheric Ozone Pollution: A North American Perspective” dated December 20, 1998.

OCR for page 31
REVIEW OF THE NARSTO DRAFT REPORT: AN ASSESSMENT OF TROPOSPHERIC OZONE POLLUTION–A NORTH AMERICAN PERSPECTIVE POLICY QUESTIONS FOR THE NARSTO ASSESSMENT DOCUMENT What changes have occurred to tropospheric ozone science over the last decade to alter (or confirm) the course of current air-quality management strategies? How manageable is the ozone problem for a given area? (What portion of the problem is local, and what portion is transported in? What portion is essentially irreducible, and what portion is potentially controllable?) Are existing emissions-control measures helping to bring the ozone problem under control? (For a given area, if these control measures are continued, will they lead to ozone abatement?) What are the relationships between on-going efforts to manage tropospheric ozone pollution and the scientific understanding of the issues? What are alternate approaches for reducing current and future high ozone concentrations on urban (< 200 km) and regional (200 - 2000 km) scales? How can we best track and assess the progress and effectiveness of our ozone-management efforts? Will our efforts to manage ozone help or hinder efforts to mitigate other environmental problems, such as acid rain, fine particles, and global climate change, and vice versa?