SHIVA - Stratospheric Ozone: Halogen Impacts in a Varying Atmosphere

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University of East Anglia, United Kingdom (UEA)

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The UEA School of Environmental Sciences (ENV) holds the highest possible rating (5**) in the UK Research Assessment Exercise. The proposed project will be carried out by the Atmospheric Chemistry Group (ACG); a sub-unit within the Laboratory for Global Marine and Atmospheric Chemistry (LGMAC). The ACG is involved in gas phase atmospheric chemistry studies and has a wide range of facilities including gas chromatographic (GC), mass spectrometric (MS) and fast in-situ gas analysers. The ACG has a long history of making trace gas measurements in the troposphere and stratosphere from aircraft, balloons, ships and ground stations. They have contributed both authorship and data to most major Assessments of the IPCC and UNEP/WMO over the last 15 years. They have excellent facilities for performing the proposed field and laboratory measurements. These include the Waters AutoSpec GC-MS which is sensitive to trace gases at parts in 1016 in 200 ml air samples. They have pioneered the use of negative ion chemical ionisation (NICI) GC-MS for measurement of organohalogens, making it possible to make high-sensitivity measurements with field-portable equipment. This is important for this proposal where we require a fast turn-around of sample analyses between aircraft flights.

Tasks within SHIVA:

  • Co-ordination of Work Package 2
  • Atmospheric measurements of halocarbons, including VSLS, at the various ground stations (Borneo, Cape Verde, Cape Grim) (WP-2)
  • Measurements of halocarbons from the aircraft activities (HALO, CARIBIC) (WP-2)
  • Assessment of seasonal cycles and vertical distributions of VSLS.
  • Provision of data for the modelling component of SHIVA (WP-4, -5, -6)
  • Contribution to the database of VSLS distributions/fluxes (WP-3)

Involved scientists:

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