SHIVA - Stratospheric Ozone: Halogen Impacts in a Varying Atmosphere


University of Leeds, United Kingdom (UNIVlLEEDS)


The University of Leeds has very strong research interests in wide-ranging areas of atmospheric science based in the School of Chemistry and the School of Earth and Environment. The School of Chemistry has 5 faculty and about 30 PDRAs and PhD students who perform laboratory studies of reaction kinetics and photochemistry, field observations of tropospheric species and numerical modelling from the boundary layer to the thermosphere. An atmospheric chamber (HIRAC) enables highly instrumented studies of simulated environments The School of Earth and Environment has a total of about 50 faculty staff, PDRAs and PhD students working on global climate modelling, tropospheric-stratospheric chemical modelling, aerosol microphysical modelling, radiative transfer, dynamical studies of the boundary layer and free troposphere and tropospheric chemical observations. The head of the UK National Centre for Atmospheric Science (NCAS), Prof. S. Mobbs, is based in Leeds. Field instrumentation is a key component of the NCAS-funded Facility for Ground based Atmospheric Measurements (FGAM), also based in Leeds. In the last national Research Assessment Exercise in 2008 both Schools were highly graded (Chemistry and Environment ranked 8th and 12th in the UK respectively), confirming their status of performing research of international quality. The two schools have a successful track record of collaboration in joint projects, recent examples being the NAMBLEX (organised by Heard), ITOP, CHABLIS and AMMA fieldwork projects.

Tasks within SHIVA:

  • UNIVLEEDS will make observations of the in situ concentrations of iodine monoxide radicals as a function of altitude in the marine boundary layer and free-troposphere from aboard the research aircraft HALO (WP-2)
  • UNIVLEEDS will develop the 3D model scheme for VSLS degradation in the troposphere and assess the PGI and SGI transport to the stratosphere over the past 25 years (WP-4).
  • UNIVLEEDS will model Iy chemistry to help assess budget of iodinated species in the TTL, and also provide model results for trends in other halogen species (WP-5).
  • UNIVLEEDS will run a coupled chemistry-climate model and a CTM to assess the impact of VSLS on stratospheric ozone (WP-6)

Involved scientists:

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