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A diagnostic interface for the ICOsahedral Non-hydrostatic (ICON) modelling framework based on the Modular Earth Submodel System (MESSy v2.50)

Kern, Bastian and Jöckel, Patrick (2016) A diagnostic interface for the ICOsahedral Non-hydrostatic (ICON) modelling framework based on the Modular Earth Submodel System (MESSy v2.50). Geoscientific Model Development, 9 (10), pp. 3639-3654. Copernicus Publications. DOI: 10.5194/gmd-9-3639-2016 ISSN 1991-959X

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Official URL: http://dx.doi.org/10.5194/gmd-9-3639-2016

Abstract

Numerical climate and weather models have advanced to finer scales, accompanied by large amounts of output data. The model systems hit the input and output (I/O) bottleneck of modern high-performance computing (HPC) systems. We aim to apply diagnostic methods online during the model simulation instead of applying them as a post-processing step to written output data, to reduce the amount of I/O. To include diagnostic tools into the model system, we implemented a standardised, easy-to-use interface based on the Modular Earth Submodel System (MESSy) into the ICOsahedral Non-hydrostatic (ICON) modelling framework. The integration of the diagnostic interface into the model system is briefly described. Furthermore, we present a prototype implementation of an advanced online diagnostic tool for the aggregation of model data onto a user-defined regular coarse grid. This diagnostic tool will be used to reduce the amount of model output in future simulations. Performance tests of the interface and of two different diagnostic tools show, that the interface itself introduces no overhead in form of additional runtime to the model system. The diagnostic tools, however, have significant impact on the model system's runtime. This overhead strongly depends on the characteristics and implementation of the diagnostic tool. A diagnostic tool with high inter-process communication introduces large overhead, whereas the additional runtime of a diagnostic tool without inter-process communication is low. We briefly describe our efforts to reduce the additional runtime from the diagnostic tools, and present a brief analysis of memory consumption. Future work will focus on optimisation of the memory footprint and the I/O operations of the diagnostic interface.

Item URL in elib:https://elib.dlr.de/104741/
Document Type:Article
Title:A diagnostic interface for the ICOsahedral Non-hydrostatic (ICON) modelling framework based on the Modular Earth Submodel System (MESSy v2.50)
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kern, BastianDLR, IPAhttps://orcid.org/0000-0002-7646-9273
Jöckel, PatrickDLR, IPAhttps://orcid.org/0000-0002-8964-1394
Date:13 October 2016
Journal or Publication Title:Geoscientific Model Development
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:9
DOI :10.5194/gmd-9-3639-2016
Page Range:pp. 3639-3654
Publisher:Copernicus Publications
ISSN:1991-959X
Status:Published
Keywords:Klimamodell Diagnostik Erdsystemmodell Climate model Diagnostic
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Transport System
DLR - Research area:Transport
DLR - Program:V VS - Verkehrssystem
DLR - Research theme (Project):V - Verkehrsentwicklung und Umwelt II (old), R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Kern, Dr. Bastian
Deposited On:04 Jul 2016 09:46
Last Modified:02 May 2019 14:14

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