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IS-ENES2_D3.2_Crossing the Chasm: How to Develop Weather and Climate Codes for Next Generation Computers

Weather and climate models are complex software with many components, ranging from science to infrastructure. Preparing these for future computing is likely to be problematic, leading to the possibility that such models will arrive at a chasm separating scientific aspiration from ability to exploit new hardware. Shared (converged) code is part of the solution. This paper outlines (a) the problems anticipated as models deal with the increasing concurrency needed to exploit next generation hardware, (b) a range of projects aimed at addressing the difficulties anticipated, and (c) a set of criteria for libraries, codes, and institutional behaviours necessary for crossing the anticipated chasm. The main body of the paper appears in the format for the Geoscientific Model Development journal, since it will also be submitted there for publication in summer 2017.

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IS-ENES3 has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 824084