The EU H2020 ESCAPE (www.hpc-escape.eu) project brings together numerical weather prediction (NWP), climate and high-performance computing (HPC) communities to develop world-class, extreme-scale computing capabilities to European operational NWP and future climate models. One of the challenges is to execute complex state-of-the-art models of the atmosphere within tight production schedules.

After the successful first 18 months of the project there was plenty of experience and results we would like to share with the community. The workshop sessions was organised according to the following topics, including oral presentations, keynote speakers and panel discussions:

• Weather & Climate Dwarfs – aspects and fundamental building blocks underlying weather and climate services;
• Diagnostics methods and tools, co-design and algorithms development for use in extreme-scale, HPC applications, minimising time- and cost-to-solution;
• Code adaptation and hybrid computing to exploit higher-level data structures, language abstractions, specialised accelerators and alternative technologies;
• Relevant EU projects involving HPC for weather, climate, ocean and sea, Earth System Modelling communities;
• Panel discussions on key issues from the workshop.

Tuesday, 5th September 2017
Updates on ESCAPE and related Topics
Time	Title	Presenter
13:00 - 13:10	Welcome & General Information	Michal Kulczewski / PSNC
13:10 - 13:30	ESCAPE Project Introduction	Peter Bauer / ECMWF
13:30 - 14:40	Session: Weather & Climate Dwarfs – aspects and fundamental algorithmic building blocks underlying weather and climate services	Chair: Nils Wedi
	Recent advances in IFS - High resolution forecast error with reduced precision	Nils Wedi / ECMWF
	Elliptic operator preconditioning for all-scale atmospheric modelling	Mike Gillard / Loughborough Univ
	Shallow water model at MeteoFrance	Michael Glinton / MeteoFrance
	The HEVI approach in Discontinuous Galerkin methods	Michael Baldauf /DWD
	NWP dwarfs of EULAG model for structured grids	Zbigniew Piotrowski / PSNC
14:40 - 15:40	Session: Code Adaptation Approaches - Addressing Heterogeneous Architectures	Chair: Carlos Osuna
	Tuning the implementation of the radiation scheme ACRANEB2	Jacob Poulsen / DMI
	Optimising data layout for performance portability: Psyclone as a Fortran DSL	Alastair McKinstry / ICHEC
	Language abstractions for performance portability of weather codes on unstructured meshes: Use case of MPDATA using GridTools DSL and Atlas	Carlos Osuna / MeteoSwiss and Willem Deconick / ECMWF
15:40 - 16:10	Coffee Break
16:10 - 17:10	Session: Hybrid Computing - optimising the exploitation of alternative technologies and specialised accelerators	Chair: Peter Messmer
	Dwarf Performance Modeling	Miłosz Ciżnicki / PSNC
	Dwarf Optimization for x86 architectures	Erwan Raffin / Atos
	Optimizing Dwarfs for GPUs	Peter Messmer/ NVIDIA
	Progress of Dwarfs on Optical Procesors	Nick New / Optalysys
17:10 - 18:00	Session: Benchmarking and Diagnostics - gaugeing code efficiency and energy consumption for regional and global NWP applications	Chair: Piet Termonia
	DCworms - performance simulator	Sebastian Ciesielski / PSNC
	Modelling the performance of AROME and comparing to other dynamical cores	Yongjun Zheng, Philippe Marguinaud / MeteoFrance
	The scalability of the ALARO reference configurations and its dwarfs	Joris Van Bever / RMI
18:00	Adjourn and Icebreaker
Wednesday, 6th September 2017
Invited Talks Session 1		Chair: Piet Termonia
Time	Title	Presenter
09:00 - 09:20	Profiling Analysis of IFS for massively parallel executions	Mario Acosta / BSC
09:20 - 09:40	Recent developments in the LFRiC model	Iva Kavcic / MetOffice
09:40 - 10:00	European Programme on Extremes of Weather, Climate and Computing (EPECC)	Peter Bauer / ECMWF
10:00 - 10:30	Coffee Break
Invited Talks Session 2		Chair: Peter Bauer
Time	Title	Presenter
10:30 - 11:00	Challenges in Modelling and Assimilation in the Exascale Era	Mark Govett / NOAA
11:00 - 11:30	Applicaton and Performance Quantification of Putative Exascale Software Technologies for High Order Computational Fluid Dynamics	Duane Rosenberg / NOAA
11:30 - 12:30	Panel discussion Europe-US collaboration	Mark Govett (chair)
12:30 - 14:00	Lunch
Workshop Working Groups Part 1
Time	Title	Chair
14:00 - 15:00	Introductory plenary discussion on definition of working groups	Nils Wedi / ECMWF
15:00 - 17:30	Parallel Working Groups
17:30	Adjourn
Thursday,7th September 2017
Workshop - Working Groups (Part 2)
Time	Title	Chair
09:00 - 10:30	Parallel Working Groups (continued)
10:30 - 11:00	Coffee Break
11:00 - 11:20	Outcome Working Group 1	WG1 Chair
11:20 - 11:40	Outcome Working Group 2	WG2 Chair
11:40 - 12:00	Outcome Working Group 3	WG3 Chair
12:00 - 13:00	Plenary Session	Moderators: Peter Bauer / ECMWF, Nils Wedi / ECMWF
13:00	End of Meeting

The workshop will be held in the beautiful city of Poznań in Poland at the Poznan Supercomputing and Networking Center (PSNC), close to Poznan University of Technology. PSNC is a leading research and computing centre in Poland, innovating and providing high performance and energy-efficient computing, optical networking and advanced applications to enable advances in eScience and engineering. 

Workshop schedule – from Tuesday 5 September 2017 13:00 to Thursday 7 September 2017 13:00

Workshop location – Poznan Supercomputing and Networking Center, Jana Pawla II 10, 61-139, Poznan, Poland. Telephone: +48 61 858 20 01

Ariel Oleksiak (ariel@man.poznan.pl), Michal Kulczewski (michal.kulczewski@man.poznan.pl), Peter Bauer (peter.bauer@ecmwf.int), Nils Wedi (nils.wedi@ecmwf.int), Daniel Thiemert (daniel.thiemert@ecmwf.int), Bent H. Sass (bhs@dmi.dk)