Le forum apporte les dernières connaissances scientifiques au débat politique et public. Il présente des options concrètes d'action sur le changement climatique en Suisse. Les thèmes abordés vont de la compréhension du changement climatique à la réduction des émissions et à l'adaptation aux conséquences.en plus

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Aims of the project

orageux atmosphère lac forêt alluviale
Image : M. Bolliger

The main goals of the project are

  • to provide a quantitative comprehensive assessment of all types of uncertainties inherent in the mid-latitudinal storm tracking by comparing different methodologies with respect to data of different resolution (time and space) and limited areas, for both cyclone identification and cyclone tracking respectively.
  • to intercompare the metrics of mid-latitudinal cyclone activity (identification/tracking) used for different purposes
  • to provide definitions of "storms" and "cyclones" and point out the informations that can be drawn from specific methods, depending on data availability (time/space resolution)
  • the intercomparison establishes a multi-method storm climatology that could serve as a baseline for climate impact studies

In order to achieve these goals the following objectives are to be met:

  • to provide an inventory of the existing methods for cyclone identification and tracking (catalogue), including their data needs
  • to compare the existing identification and tracking methods using data of different space-time resolutions, both in terms of climatologies and in terms of the identification of single storms
  • to compare the algorithms' sensitivity to spatial and temporal resolution of the underlying data and to provide information of the relative uncertainties arising from different methods, reanalysis products and model simulations (including results for limited areas).
  • to estimate and intercompare the information content provided by the methods
  • to provide a systematic intercomparison of different quantities used for describing cyclone activity and strength from a dynamical viewpoint, and to relate them to impact related weather parameters.
  • to provide a "users' guide" explaining the information that can be taken and the restrictions related to the individual standard
  • discuss the possibility of recommending specific methods for different purposes and settings

Outcome
Final Report containing

  • an overview of existing methods, including a description of the information contained in the results and the limitations of each individual standard method
  • an overview of standard parameters for the quantification of cyclone activity and intensity characteristics, including their limitations
  • comments on further work to be done

Contact

Dr. Urs Neu
SCNAT
ProClim − Forum sur le climat et les changements globaux (ProClim)
Maison des Académies
Case postale
3001 Berne