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On the need of bias correction methods for wave climate projections

Abstract: This study focuses on the assessment of systematic biases in wave climate simulations, exploring different bias correction methods commonly used for climate impact variables (e.g. precipitation, temperature), and on the analysis of bias corrected wave climate projections. Four different bias correction methods are analyzed, two of which are applied to an 8-member dynamic multi-forcing global wave climate ensemble, to mitigate the significant wave height (HS) bias. The GOW2 (Global Ocean Waves 2) global wave hindcast is used as reference data for the calibration. Assuming that the statistical properties of the present climate biases are maintained in the future, these biases can be corrected by applying a bias correction model based on the reference data. Thus, the impact of climate change in the bias corrected future HS climate, is also investigated. A bias corrected 8-member ensemble is analyzed for the 2081?2100 period, under the RCP8.5 scenario. The results indicate the relevance of bias correction in both the estimation of ensemble mean HS projected changes towards the end of the 21st century, and in the ensemble spread magnitude. Outcomes support the need for a quantile based bias correction, able to deal with extreme events, which have a disproportionate impact in coastal processes.

 Fuente: Global and Planetary Change Volume 186, March 2020, 103109

Editorial: Elsevier

 Fecha de publicación: 01/03/2020

Nº de páginas: 20

Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.gloplacha.2019.103109

ISSN: 0921-8181,1872-6364

Proyecto español: RYC - 2014-6469

Proyecto europeo: info:eu-repo/grantAgreement/EC/H2020/690462/EU/European Research Area for Climate Services/ERA4CS/

Url de la publicación: https://doi.org/10.1016/j.gloplacha.2019.103109

Autores/as

SEMEDO, ALVARO

PAULA CAMUS BRAÑA

HEMER, MARK

DOBRYNIN, MIKHAIL

MIRANDA, PEDRO M.A.