4.5 Article

Challenges in the Quest for Added Value of Regional Climate Dynamical Downscaling

Journal

CURRENT CLIMATE CHANGE REPORTS
Volume 1, Issue 1, Pages 10-21

Publisher

SPRINGER HEIDELBERG
DOI: 10.1007/s40641-015-0003-9

Keywords

Regional climate model; Dynamical downscaling; Added value; Climate change signal; Evaluation; Boundary conditions

Funding

  1. Climate Change Research Centre of the University of New South Wales
  2. Quebec OURANOS Consortium on Regional Climatology and Adaptation to Climate Change
  3. ESCER Centre for the Study and Simulation of Climate at Regional Scale at the University of Quebec at Montreal (UQAM)

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This paper summarises the current state of understanding with respect to the added value (AV) to be expected from one-way nested high-resolution regional climate simulations and projections. The reasons that lead to the development and the progress of regional climate models (RCMs) are first considered. The scientific basis sustaining the RCMs mission is then briefly reviewed. Based on recent publications of studies on the topic of AV, concepts related to the various definitions of AV are examined with the aim of clarifying their meaning and of bridging different schools of thought. The conditions under which AV can be expected, and in which variables and statistical moments, are also discussed.

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