Evaluation of HARMONIE in the KNMI Parameterisation Testbed

E I F De Bruijn,W C De Rooy

doi:10.5194/asr-8-167-2012

E I F De Bruijn, W C De Rooy

Open Access

https://doi.org/10.5194/asr-8-167-2012

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Abstract

Abstract. HARMONIE, a non-hydrostatic NWP model has a single column version which is used for testing and validation of physical parameterisations. Since January 2010, this single column model (SCM) has been run on a daily basis in the KNMI parameterisation testbed (KPT). In this testbed, the HARMONIE SCM is run with different options and the output is compared with a wide variety of observations and other participating SCMs as well as large-eddy simulations (LES) model output. The evaluation presented here makes use of the advanced observation site Cabauw in the Netherlands, with a focus on shallow convection, turbulence and cloud formation. The examples shown illustrate the potential of the daily monitoring and in-depth evaluation to detect and improve model deficiencies.

Highlights

HARMONIE is a non-hydrostatic NWP model that is used for mesoscale predictions
In this paper we focus on HARMONIE cycle 36 with AROME physics (Seity et al, 2012)
Since January 2010, this single column model (SCM) is run on a daily basis in the KNMI parameterisation testbed (KPT). In this testbed the HARMONIE SCM is validated against observations and large- eddy simulations (LES)

Summary

Introduction

HARMONIE is a non-hydrostatic NWP model that is used for mesoscale predictions. It is developed in cooperation with the HIRLAM and ALADIN consortia. Since January 2010, this single column model (SCM) is run on a daily basis in the KNMI parameterisation testbed (KPT) The aim of this article is to illustrate the potential of the daily monitoring in the KPT by showing an evaluation of the HARMONIE SCM focusing on low clouds and mist. This is done by showing two examples in which striking differences occur between two HARMONIE model configurations with different convection and cloud schemes. Observations from Cabauw and LES output are used as reference

The parameterisation testbed

Conclusions and discussion