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Please note that this session was withdrawn and is no longer available in the respective programme. This withdrawal might have been the result of a merge with another session.

AS1.17

Weekly Weather Cycles of Meteorological Variables
Convener: Arturo Sanchez-Lorenzo  | Co-Conveners: Patrick Laux , Harrie-Jan Hendricks Franssen , Stefanie Vogl 

There is still an ongoing scientific debate whether weekly cycles (also called “weekend effect”) of meteorological variables (temperature, precipitation, cloudiness, etc.) in large domains, which can hardly be related to urban effects, exist or not. In addition to the lack of the positive proof for the existence of these cycles, their possible physical explanations have been controversially discussed during the last years.

This session therefore welcomes abstract submissions that explore (i) the existence or non-existence of significant weekly weather cycles across different regions of the world, (ii) innovative strategies (e.g. methods from the field of signal processing and/or statistical tests) to proof or to falsify their existence, and (iii) potential reasons for a weekly signal, especially focusing in the aerosol-cloud-radiation by means of climate models simulations, in order to find a possible physical explanation. This could e.g. shed light on the impacts of human activities on weather and improve our understanding of relevant processes in the atmosphere.

Solicited talk:
- Graham Weedon, Met Office Hadley Centre, United Kingdom (graham.weedon@metoffice.gov.uk).