Comparison of radiation parametrizations within the HARMONIE–AROME NWP model
Downwelling shortwave radiation at the surface (SWDS, global solar radiation flux), given by three different parametrization schemes, was compared to observations in the HARMONIE–AROME numerical weather prediction (NWP) model experiments over Finland in spring 2017. Simulated fluxes agreed well...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2018-05-01
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| Series: | Advances in Science and Research |
| Online Access: | https://www.adv-sci-res.net/15/81/2018/asr-15-81-2018.pdf |
| Summary: | Downwelling shortwave radiation at the surface (SWDS, global
solar radiation flux), given by three different parametrization schemes, was
compared to observations in the HARMONIE–AROME numerical weather
prediction (NWP) model experiments over Finland in spring 2017. Simulated
fluxes agreed well with each other and with the observations in the clear-sky
cases. In the cloudy-sky conditions, all schemes tended to underestimate SWDS
at the daily level, as compared to the measurements. Large local and temporal
differences between the model results and observations were seen, related to
the variations and uncertainty of the predicted cloud properties.
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The results suggest a possibility to benefit from the use of different
radiative transfer parametrizations in a NWP model to obtain perturbations
for the fine-resolution ensemble prediction systems. In addition, we
recommend usage of the global radiation observations for the standard
validation of the NWP models. |
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| ISSN: | 1992-0628 1992-0636 |