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SPARC – Stratosphere-troposphere Processes And their Role in Climate

A core project of the World Climate Research Programme, SPARC coordinates international efforts to bring knowledge of the atmosphere to bear on issues regarding climate variability and prediction. SPARC themes and activities address areas of societal concern such as:

  • Climate variability and change: SPARC explores the impact of changing atmospheric composition on circulation and weather, from increasing surface temperatures to severe weather events. The atmosphere represents a significant source of variability and internal memory of the climate system. More.

  • Ozone:  Ozone and the ozone layer are of major concern to life on Earth. SPARC provides key scientific support to the WMO/UNEP Ozone Assessments that are produced every four years in accordance with the mandate of the signatories of the Montreal Protocol. More.

  • Atmospheric chemistry and aerosols: Atmospheric chemistry is a cornerstone for understanding the evolution of the climate system. Greenhouse gases (GHGs) and ozone depleting substances (ODSs) have warmed the troposphere but cooled the stratosphere. SPARC is actively involved in advancing our understanding of the chemical processes that affect climate. More.

  • Polar processes: Melting ice sheets and sea-ice greatly affect not only the polar regions, but also other parts of the globe through atmospheric teleconnections and circulation changes. In collaboration with other expert groups, SPARC brings its expertise to bear on scientific issues specific to the polar regions and how they affect the rest of the globe. More.







    Annual Report