Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6080
Title: Downscaling of monthly precipitation using CMIP5 climate models operated under RCPs
Authors: Okkan, Umut
Kırdemir, Umut
Keywords: CMIP5 data
ERA-Interim reanalysis data
RCPs
Correcting bias
Multi-GCM ensemble
Issue Date: 1-Jul-2016
Publisher: John Wiley and Sons Inc.
Source: Okkan, U., and Kırdemir, U. (2016). Downscaling of monthly precipitation using CMIP5 climate models operated under RCPs. Meteorological Applications, 23(3), 514-528. doi:10.1002/met.1575
Abstract: Downscaling of general circulation model (GCM) outputs extracted from CMIP5 datasets to monthly precipitation for the Gediz Basin, Turkey, under Representative Concentration Pathways (RCPs) was performed by statistical downscaling models, multi-GCM ensemble and bias correction. The output databases from 12 GCMs were used for the projections. To determine explanatory predictor variables, the correlation analysis was applied between precipitation observed at 39 meteorological stations located over the Basin and potential predictors of ERA-Interim reanalysis data. After setting both artificial neural networks and least-squares support vector machine-based statistical downscaling models calibrated with determined predictor variables, downscaling models producing the most suitable results were chosen for each meteorological station. The selected downscaling model structure for each station was then operated with historical and future scenarios RCP4.5, RCP6.0 and RCP8.5. Afterwards, the monthly precipitation forecasts were obtained from a multi-GCM ensemble based on Bayesian model averaging and bias correction applications. The statistical significance of the foreseen changes for the future period 2015–2050 was investigated using Student's t test. The projected decrease trend in precipitation is significant for the RCP8.5 scenario, whereas it is less significant for the RCP4.5 and RCP6.0 scenarios.
URI: http://doi.org/10.1002/met.1575
http://hdl.handle.net/11147/6080
ISSN: 1350-4827
1469-8080
Appears in Collections:Civil Engineering / İnşaat Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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