Preprints
https://doi.org/10.5194/gmd-2020-168
https://doi.org/10.5194/gmd-2020-168

Submitted as: model description paper 02 Jul 2020

Submitted as: model description paper | 02 Jul 2020

Review status: a revised version of this preprint was accepted for the journal GMD and is expected to appear here in due course.

Radiative Transfer Model 3.0 integrated into the PALM model system 6.0

Pavel Krč1, Jaroslav Resler1, Matthias Sühring2, Sebastian Schubert3, Mohamed H. Salim3,4, and Vladimír Fuka5 Pavel Krč et al.
  • 1Institute of Computer Science, Czech Academy of Sciences, Prague, Czech Republic
  • 2Institute of Meteorology and Climatology, Leibniz University Hannover, Hannover, Germany
  • 3Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany
  • 4Faculty of Energy Engineering, Aswan University, Aswan, Egyp
  • 5Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic

Abstract. The Radiative Transfer Model (RTM) is an explicitly resolved three-dimensional multi-reflection radiation model integrated in the PALM modelling system. It is responsible for modelling of complex radiative interactions within the urban canopy and it represents a key component of modelling of energy processes inside the urban layer, and consequently PALM's ability to provide explicit simulations of urban canopy in meter-scale resolution. This paper describes RTM version 3.0 which is integrated in PALM modelling system version 6.0. This version of RTM has been substantially improved over previous versions with new simulated processes, providing a more realistic representation of a wider range of urban scenarios, as well as with new discretization schemes and algorithms for a significantly better scalability and computational efficiency, enabling larger parallel simulations with up to many thousands of parallel processes.

Pavel Krč et al.

 
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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Status: closed
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Pavel Krč et al.

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Latest update: 11 Apr 2021
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Short summary
The adverse effects of urban environment, e.g. heat stress and air pollution, pose a risk to health and well-being. A precise modelling of urban climate is a crucial approach for mitigating these effects. Conventional atmospheric models are inadequate for modelling the complex structures of the urban environment; in particular, they lack a 3-D model of radiation and its interaction with surfaces and plant canopy. The new RTM model simulates these processes within the PALM-4U urban climate model.