Articles | Volume 9, issue 2
https://doi.org/10.5194/gmd-9-731-2016
https://doi.org/10.5194/gmd-9-731-2016
Development and technical paper
 | 
19 Feb 2016
Development and technical paper |  | 19 Feb 2016

Bitwise identical compiling setup: prospective for reproducibility and reliability of Earth system modeling

R. Li, L. Liu, G. Yang, C. Zhang, and B. Wang

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Alexander, K. and Easterbrook, S. M.: The software architecture of climate models: a graphical comparison of CMIP5 and EMICAR5 configurations, Geosci. Model Dev., 8, 1221–1232, https://doi.org/10.5194/gmd-8-1221-2015, 2015.
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Easterbrook, S. M. and Johns, T. C.: Engineering the software for understanding climate change, Comput. Sci. Eng., 11, 65–74, 2009.
Hong, S. Y., Koo, M. S., Jang, J., Esther Kim, J. E., Park, H., Joh, M. S., Kang, J. H., and Oh, T. J.: An Evaluation of the Software System Dependency of a Global Atmospheric model, Mon. Weather Rev., 141, 4165–4172, 2013.
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Short summary
In this paper, we show that different compiling setups can achieve exactly the same (bitwise identical) results in Earth system modeling, and a set of bitwise identical compiling setups of a model can be used across different compiler versions and different compiler flags. Moreover, we shows that new test cases can be generated based on differences of bitwise identical compiling setups between different models, which can help detect software bugs and finally improve the reliability.