Diez-Sierra, Javier and Iturbide, Maialen and Gutiérrez, José M. and Fernández, Jesús and Milovac, Josipa and Cofiño, Antonio S. and Cimadevilla, Ezequiel and Nikulin, Grigory and Levavasseur, Guillaume and Kjellström, Erik and Bülow, Katharina and Horányi, András and Brookshaw, Anca and García-Díez, Markel and Pérez, Antonio and Baño-Medina, Jorge and Ahrens, Bodo and Alias, Antoinette and Ashfaq, Moetasim and Bukovsky, Melissa and Buonomo, Erasmo and Caluwaerts, Steven and Chou, Sin Chan and Christensen, Ole B. and Ciarlò, James M. and Coppola, Erika and Corre, Lola and Demory, Marie-Estelle and Djurdjevic, Vladimir and Evans, Jason P. and Fealy, Rowan and Feldmann, Hendrik and Jacob, Daniela and Jayanarayanan, Sanjay and Katzfey, Jack and Keuler, Klaus and Kittel, Christoph and Kurnaz, Mehmet Levent and Laprise, René and Lionello, Piero and McGinnis, Seth and Mercogliano, Paola and Nabat, Pierre and Önol, Barış and Ozturk, Tugba and Panitz, Hans-Jürgen and Paquin, Dominique and Pieczka, Ildikó and Raffaele, Francesca and Remedio, Armelle Reca and Scinocca, John and Sevault, Florence and Somot, Samuel and Steger, Christian and Tangang, Fredolin and Teichmann, Claas and Termonia, Piet and Thatcher, Marcus and Torma, Csaba and van Meijgaard, Erik and Vautard, Robert and Warrach-Sagi, Kirsten and Winger, Katja and Zittis, George (2022) The Worldwide C3S CORDEX Grand Ensemble: A Major Contribution to Assess Regional Climate Change in the IPCC AR6 Atlas. Bulletin of the American Meteorological Society, 103 (12). E2804-E2826. ISSN 1520-0477

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Abstract

The collaboration between the Coordinated Regional Climate Downscaling Experiment (CORDEX) and the Earth System Grid Federation (ESGF) provides open access to an unprecedented ensemble of regional climate model (RCM) simulations, across the 14 CORDEX continental-scale domains, with global coverage. These simulations have been used as a new line of evidence to assess regional climate projections in the latest contribution of the Working Group I (WGI) to the IPCC Sixth Assessment Report (AR6), particularly in the regional chapters and the Atlas. Here, we present the work done in the framework of the Copernicus Climate Change Service (C3S) to assemble a consistent worldwide CORDEX grand ensemble, aligned with the deadlines and activities of IPCC AR6. This work addressed the uneven and heterogeneous availability of CORDEX ESGF data by supporting publication in CORDEX domains with few archived simulations and performing quality control. It also addressed the lack of comprehensive documentation by compiling information from all contributing regional models, allowing for an informed use of data. In addition to presenting the worldwide CORDEX dataset, we assess here its consistency for precipitation and temperature by comparing climate change signals in regions with overlapping CORDEX domains, obtaining overall coincident regional climate change signals. The C3S CORDEX dataset has been used for the assessment of regional climate change in the IPCC AR6 (and for the interactive Atlas) and is available through the Copernicus Climate Data Store (CDS).

Item Type:	Article
Keywords:	Climate change; Downscaling; Regional models; Ensembles; Data quality control; Climate services;
Academic Unit:	Faculty of Science and Engineering > Research Institutes > National Centre for Geocomputation, NCG Faculty of Social Sciences > Geography Faculty of Social Sciences > Research Institutes > Irish Climate Analysis and Research Units, ICARUS Faculty of Social Sciences > Research Institutes > Maynooth University Social Sciences Institute, MUSSI
Item ID:	17483
Identification Number:	https://doi.org/10.1175/BAMS-D-22-0111.1
Depositing User:	Rowan Fealy
Date Deposited:	04 Sep 2023 14:35
Journal or Publication Title:	Bulletin of the American Meteorological Society
Publisher:	American Meteorological Society
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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