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Open AccessArticle

Using Shortwave Radiation to Evaluate the HARMONIE-AROME Weather Model

by Kristian Pagh Nielsen 1,*,† and Emily Gleeson 2,†
Danmarks Meteorologiske Institut, DK-2100 Copenhagen, Denmark
Met Éireann, 65/67 Glasnevin, Dublin 9, D09 Y921, Ireland
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Atmosphere 2018, 9(5), 163;
Received: 5 March 2018 / Revised: 10 April 2018 / Accepted: 12 April 2018 / Published: 26 April 2018
(This article belongs to the Special Issue Energy Meteorology)
Evaluation of global shortwave irradiance forecasts from the HARMONIE-AROME weather prediction model is presented in this paper. We give examples of how such an evaluation can be used when testing a weather model or reanalysis product. We specifically use the non-dimensional clear sky and variability indices. We have tested seven months of HARMONIE-AROME 40h1.1 output against Danish global irradiance stations and 35 years of the Irish Met Éireann reanalysis (MÉRA) simulations. MÉRA, which is run with HARMONIE-AROME 38h1.2, is shown to have a significantly lower bias than the previously available global horizontal irradiance (GHI) reanalysis data from the ERA-Interim dataset. The Danish HARMONIE-AROME 40h1.1 has a negative bias during the summer months that is not seen in the Irish HARMONIE-AROME 38h1.2. For both model runs, we find a negative bias in the shortwave irradiance forecasts on days with thick clouds. This suggest that the model has too much cloud water in thick clouds. View Full-Text
Keywords: solar irradiance; clear sky index; variability index; Ireland; Denmark; HARMONIE-AROME; MÉRA solar irradiance; clear sky index; variability index; Ireland; Denmark; HARMONIE-AROME; MÉRA
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Nielsen, K.P.; Gleeson, E. Using Shortwave Radiation to Evaluate the HARMONIE-AROME Weather Model. Atmosphere 2018, 9, 163.

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