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Can weekly cycles be used to determine the climatic response to anthropogenic aerosol loading?

Can weekly cycles be used to determine the climatic response to anthropogenic aerosol loading?. David Ridley (Supervisors: K. Carslaw, M. Chipperfield). Useful for getting around the problems of trend analysis Signal likely to be small hence lots of data needed AIM:

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Can weekly cycles be used to determine the climatic response to anthropogenic aerosol loading?

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  1. Can weekly cycles be used to determine the climatic response to anthropogenic aerosol loading? David Ridley (Supervisors: K. Carslaw, M. Chipperfield) • Useful for getting around the problems of trend analysis • Signal likely to be small hence lots of data needed • AIM: To determine a quantitative link between aerosol loading and consequent surface forcing Constrain aerosol direct and indirect effects

  2. DTR Weekend Effect

  3. Likely Causes • Synoptic weather events • Anthropogenic sources of pollution Need to determine the significance of the second cause

  4. Cycles in DTR

  5. Anomalies • Why is there no significant ‘weekend effect’ in Europe? • Why does the sign of the ‘weekend effect’ change?

  6. DTR Weekend Effect

  7. AOT Weekend Effect

  8. Further Work • Use phase of ‘weekend effect’ to investigate transport • Explore weekly cycle in contrails to determine their role • Use seasonal results to help understand processes • Using GLOMAP to model aerosol weekly cycle • Use RTM to determine the surface forcing expected

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