Impacts of tropical UTLS ozone feedback on surface climate change projections

Add to your list(s) Download to your calendar using vCal

• Dr Peer Nowack, Cambridge University
• Monday 28 November 2016, 14:15-15:15
• Pfizer Lecture Theatre, Department of Chemistry.

If you have a question about this talk, please contact Paul Griffiths.

I will present two central results from my PhD thesis. Using an atmosphere-ocean coupled climate model, I investigated links between the model representation of the atmospheric trace gas ozone and surface climate change projections for a standard climate sensitivity experiment. I found that:

1) circulation-driven ozone changes in the tropical upper troposphere and lower stratosphere (UTLS) can have a highly significant influence on climate sensitivity estimates.

2) the representation of ozone in the UTLS can also have a major impact on the response of the Walker circulation and the El Niño Southern Oscillation to carbon dioxide forcing.

These (surprising) results are explained mechanistically, with an emphasis on how future modelling studies could address similar research questions effectively. Time allowing, I will further discuss modelling results on how solar and sulphate geoengineering schemes might affect human exposure to ultra-violet radiation and air quality.

This talk is part of the Centre for Atmospheric Science seminars, Chemistry Dept. series.

This talk is included in these lists:

• All Talks (aka the CURE list)
• CamBridgeSens
• Cambridge Environment
• Cambridge talks
• Centre for Atmospheric Science seminars, Chemistry Dept.
• Climate Science Seminars within Cambridge
• Department of Chemistry
• Featured lists
• LCLU Departmental Talks
• Life Science Interface Seminars
• Pfizer Lecture Theatre, Department of Chemistry
• Queens' College Politics Society
• School of Physical Sciences
• Talks related to atmosphere and ocean dynamics and climate science
• Trust & Technology Initiative - interesting events

Note that ex-directory lists are not shown.