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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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Preprints
https://doi.org/10.5194/gmd-2018-107
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-2018-107
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: model evaluation paper 25 Jun 2018

Submitted as: model evaluation paper | 25 Jun 2018

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This preprint was under review for the journal GMD. A revision for further review has not been submitted.

Bias correction of multi-ensemble simulations from the HAPPI model intercomparison project

Fahad Saeed1,2, Ingo Bethke3, Stefan Lange4, Ludwig Lierhammer5, Hideo Shiogama6, Dáithí A. Stone7, Tim Trautmann8, and Carl-Friedrich Schleussner1,4,9 Fahad Saeed et al.
  • 1Climate Analytics, Berlin, Germany
  • 2Center of Excellence for Climate Change Research, King Abdulaziz University, Jeddah, Saudi Arabia
  • 3Uni Research Climate, Bjerknes Centre for Climate Research, Bergen, Norway
  • 4Potsdam Institute for Climate Impact Research, Potsdam, Germany
  • 5Deutsches Klimarechenzentrum, Hamburg, Germany
  • 6Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Japan
  • 7Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, California , USA
  • 8Institute of Physical Geography, University of Frankfurt, Frankfurt 60054, Germany
  • 9IRITHESys, Humboldt University, Berlin, Germany

Abstract. Prior to using climate data as input for sectoral impact models, statistical bias correction is commonly applied to correct climate model data for systematic deviations. Different approaches have been adopted for this purpose, however the most common are those based on the transfer functions, generated to map the distribution of the simulated historical data to that of the observations. Here, we present results of a novel bias correction method, developed for Inter-Sectoral Impact Model Intercomparison Project Phase 2b (ISIMIP2b) and applied to outputs of different GCMs generated within the HAPPI (Half A degree Additional warming, Projections, Prognosis and Impacts) project. We have employed various analysis measures including mean seasonal differences, ensemble variability, annual cycles, extreme indices as well as a global hydrological model to assess the performance of ISIMIP2b bias correction technique. The results indicate substantial improvements after the application of bias correction when compared against observational data. Moreover, the extreme indices as well as output of global hydrological model also reveal a marked improvement. At the same time, the ensemble spread of the original data is preserved after the application of bias correction. We find that the bias corrected HAPPI data can provide a reliable basis for sectoral climate impact projections.

Fahad Saeed et al.

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Status: closed (peer review stopped)
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Fahad Saeed et al.

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