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| Titel |
Radiation sensitivity tests of the HARMONIE 37h1 NWP model |
| VerfasserIn |
K. P. Nielsen, E. Gleeson, L. Rontu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 7, no. 4 ; Nr. 7, no. 4 (2014-07-16), S.1433-1449 |
| Datensatznummer |
250115662
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| Publikation (Nr.) |
 copernicus.org/gmd-7-1433-2014.pdf |
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| Zusammenfassung |
| When short-wave (SW) radiation fluxes modelled with a numerical weather
prediction (NWP) model or climate model do not match observed SW fluxes it
can be challenging to find the cause of the differences. Several elements in
the model affect SW fluxes. This necessitates individual testing of each of
the physical processes in the NWP model. Here we present a focused study of
the SW radiation schemes in the HIRLAM (HIgh Resolution Limited Area Model)
Aladin Regional Mesoscale Operational NWP In Europe (HARMONIE) model, which
is the primary NWP model used and developed by several National Weather
Services in Europe. Detailed calculations have been made with the DISORT
model run in the libRadtran framework, which is a collection of
state-of-the-art radiative transfer software and data sets. These are used to
test the NWP radiation calculations. Both models are given the same
atmospheric properties as input. We also perform a separate test of cloud
liquid optical property parameterisations with Mie calculations. This leads us
to introduce a new parameterisation for calculating these properties. In
addition, we show that the results of a simpler radiation scheme, introduced
into HARMONIE, compare well with those of the comprehensive default
parameterisations. The methodology applied here may be used for testing
radiation schemes in other NWP or climate models. |
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