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Understanding each other's models: an introduction and a standard representation of 16 global water models to support intercomparison, improvement, and communication

Telteu Camelia-Eliza, Müller Schmied Hannes, Thiery Wim, Leng Guoyong, Burek Peter, Liu Xingcai, Boulange Julien, Andersen Lauren Seaby, Gryllakis Emmanouil, Gosling Simon N., Satoh Yusuke, Rakovec Oldrich, Stacke Tobias, Chang Jinfeng, Wanders Niko, Shah Harsh Lovekumar, Trautmann Tim, Mao Ganquan, Hanasaki Naota, Koutroulis Aristeidis, Pokhrel, Yadu, Samaniego Luis, Wada Yoshihide, Mishra Vimal, Liu Junguo, Döll Petra, Zhao Fang, Gädeke Anne, Rabin Sam, Herz Florian

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URIhttp://purl.tuc.gr/dl/dias/40B4107A-E389-453D-8648-928B3B20A9B5-
Identifierhttps://doi.org/10.5194/gmd-14-3843-2021-
Identifierhttps://gmd.copernicus.org/articles/14/3843/2021/-
Languageen-
Extent36 pagesen
TitleUnderstanding each other's models: an introduction and a standard representation of 16 global water models to support intercomparison, improvement, and communicationen
CreatorTelteu Camelia-Elizaen
CreatorMüller Schmied Hannesen
CreatorThiery Wimen
CreatorLeng Guoyongen
CreatorBurek Peteren
CreatorLiu Xingcaien
CreatorBoulange Julienen
CreatorAndersen Lauren Seabyen
CreatorGryllakis Emmanouilen
CreatorΓρυλλακης Εμμανουηλel
CreatorGosling Simon N.en
CreatorSatoh Yusukeen
CreatorRakovec Oldrichen
CreatorStacke Tobiasen
CreatorChang Jinfengen
CreatorWanders Nikoen
CreatorShah Harsh Lovekumaren
CreatorTrautmann Timen
CreatorMao Ganquanen
CreatorHanasaki Naotaen
CreatorKoutroulis Aristeidisen
CreatorΚουτρουλης Αριστειδηςel
CreatorPokhrel, Yaduen
CreatorSamaniego Luisen
CreatorWada Yoshihideen
CreatorMishra Vimalen
CreatorLiu Junguoen
CreatorDöll Petraen
CreatorZhao Fangen
CreatorGädeke Anneen
CreatorRabin Samen
CreatorHerz Florianen
PublisherCopernicus Publicationsen
Content SummaryGlobal water models (GWMs) simulate the terrestrial water cycle on the global scale and are used to assess the impacts of climate change on freshwater systems. GWMs are developed within different modelling frameworks and consider different underlying hydrological processes, leading to varied model structures. Furthermore, the equations used to describe various processes take different forms and are generally accessible only from within the individual model codes. These factors have hindered a holistic and detailed understanding of how different models operate, yet such an understanding is crucial for explaining the results of model evaluation studies, understanding inter-model differences in their simulations, and identifying areas for future model development. This study provides a comprehensive overview of how 16 state-of-the-art GWMs are designed. We analyse water storage compartments, water flows, and human water use sectors included in models that provide simulations for the Inter-Sectoral Impact Model Intercomparison Project phase 2b (ISIMIP2b). We develop a standard writing style for the model equations to enhance model intercomparison, improvement, and communication. In this study, WaterGAP2 used the highest number of water storage compartments, 11, and CWatM used 10 compartments. Six models used six compartments, while four models (DBH, JULES-W1, Mac-PDM.20, and VIC) used the lowest number, three compartments. WaterGAP2 simulates five human water use sectors, while four models (CLM4.5, CLM5.0, LPJmL, and MPI-HM) simulate only water for the irrigation sector. We conclude that, even though hydrological processes are often based on similar equations for various processes, in the end these equations have been adjusted or models have used different values for specific parameters or specific variables. The similarities and differences found among the models analysed in this study are expected to enable us to reduce the uncertainty in multi-model ensembles, improve existing hydrological processes, and integrate new processes.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2023-03-21-
Date of Publication2021-
SubjectGlobal water models (GWMs)en
SubjectClimateen
SubjectUncertaintyen
SubjectImpacten
Bibliographic CitationC.-E. Telteu, H. Müller Schmied, W. Thiery, G. Leng, P. Burek, X. Liu, J. E. S. Boulange, L. S. Andersen, M. Grillakis, S. N. Gosling, Y. Satoh, O. Rakovec, T. Stacke, J. Chang, N. Wanders, H. L. Shah, T. Trautmann, G. Mao, N. Hanasaki, A. Koutroulis, Y. Pokhrel, L. Samaniego, Y. Wada, V. Mishra, J. Liu, P. Döll, F. Zhao, A. Gädeke, S. S. Rabin, and F. Herz, “Understanding each other's models: an introduction and a standard representation of 16 global water models to support intercomparison, improvement, and communication,” Geosci. Model Dev., vol. 14, no. 6, pp. 3843–3878, June 2021, doi: 10.5194/gmd-14-3843-2021.en

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