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A WMO/IGAC Report

Impacts of Megacities on Air Quality and Climate Change. A WMO/IGAC Report. Impacts of Mega-cities on Air Quality and Climate A report of WMO/IGAC Sarah Doherty Laura Gallardo Michael Gauss Mark Lawrence Abdourahamane Konare Yutaka Kondo David Parrish Tong Zhu.

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A WMO/IGAC Report

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  1. Impacts of Megacities on Air Quality and Climate Change A WMO/IGAC Report

  2. Impacts of Mega-cities on Air Quality and Climate • A report of WMO/IGAC • Sarah Doherty • Laura Gallardo • Michael Gauss • Mark Lawrence • Abdourahamane Konare • Yutaka Kondo • David Parrish • Tong Zhu

  3. Outline of WMO/IGAC Megacities Assessment Chapter 1: Introduction-methodology Chapter 2: Africa Chapter 3: North America Chapter 4: South America Chapter 5: Asia Chapter 6: Europe Chapter 7: Overview of international collaborative activities Chapter 8: Synthesis of knowledge: highlighting key issues Chapter 9:Conclusions and Implications for Policy

  4. Outline of WMO/IGAC Megacities Assessment • Chapter 1: Introduction • Urbanization process • Description of types Mega-cities • mega-cities air quality and climate issues • The similarities and the differences in emissions between mega-cities • Scientific tool for studying megacity air quality and climate • Links to other megacitites associated issues • Chapter 2: Africa • Overview: • The Greater Cairo Area • Johannesburg, Lagos not finished

  5. Outline of WMO/IGAC Megacities Assessment • Chapter 3: North America • Los Angeles: An environmental success story • The U.S. Northeast urban corridor and Houston, Texas: Contrasting US urban areas • Mexico City: North America’s most populous and rapidly developing megacity • Pollution transport in North America • Conclusions • Chapter 4: South America • Introduction • Cross-cutting Issues • Air quality in large urban agglomerations in South America • Buenos Aires • Lima • Medellin • Santiago • Sao Paolo • Summary and Outlook

  6. Outline of WMO/IGAC Megacities Assessment • Chapter 5: Asia • Overview • Bangkok • Beijing • Dhaka • Hong Kong • Jakarta • Seoul • Pearl River Delta • Shanghai • Tehran • Delhi, Karachi, Calcutta, Mumbai, Manila, Tokyo not finshed

  7. Outline of WMO/IGAC Megacities Assessment • Chapter 6: Europe • European Megacities: General and Comparative Characteristics • London • Paris • Moscow • Benelux/Rhine-Ruhr • Po Valley • Eastern Mediterranean and Istanbul megacity • Chapter 7: Overview of International collaborative activities: • MEGAPOLI • CITYZEN • PRD, CAREBEIJING to be finished • South America: • Milagro, ICARTT, CALNEX

  8. Outline of WMO/IGAC Megacities Assessment • Chapter 8 Synthesis of knowledge: highlighting key issues • Scaling law for concentration vs. population as a function of lifetime, and consequences for integrated health impact. • Comparison of air pollutant levels across different megacities • Evolution of air pollution: pressure to regulate and controls • The importance of regional transport to urban pollution levels • Sources of pollutants in different megacities • Aerosol composition across different cities • Importance of SOA • City vs. downwind: urban plume • Contribution of megacities to regional and global concentrations • Urban heat island • Tropical/sub-tropical cities vs. mid-latitude cities • Direct and indirect radiative forcing of aerosols in mega-cities and the surrounding region

  9. Outline of WMO/IGAC Megacities Assessment • Chapter 9 Conclusions and Implications for Policy • Co-benefits or “cancellation” of benefits from air quality mitigation and climate change mitigation. • Lessons learned from the past • Future trajectories

  10. Timeline: • 2009 • Lead authors for the report identified • May: The first lead authors meeting held in Beijing • paper outline finalized • additional contributing authors identified • structure of chapters on specific megacities determined • November: The second lead authors meeting held in Beijing, • Discuss the zero draft, assign the writing task • 2010 • July : The third lead authors meeting to be hold in Halifax, • to discuss the first draft, and finalize the report • September 1: start the editing of the report • October 1: internal/external review of the reports • November: the final version of the report • December, publish the report as a book • Other outcomes expected from the report: • A high profile synthesis paper • A number of papers published as a special issue in AE or ACP?

  11. Interaction with other initiatives • Megacities and costal zone • IGBP FTI • IGBP Synthesis

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