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Added Value of High-resolution Regional Climate Simulations for Regional Impact Studies

Hackenbruch, Julia; Schädler, Gerd; Schipper, Gerd; Willem, Janus

Abstract (englisch): We present a comparison of results from the regional climate model COSMO-CLM at a horizontal resolution of 2.8 km with observations and assess the added value of such higher resolution compared to a coarser resolution of 7 km. Such an added value is expected to result from a better resolution of orography and land use as well as from direct simulation of deep convection.The simulations are driven by ERA40 reanalyses for the years 1971 to 2000 and cover southwestern Germany and parts of eastern France. We show that 2.8 km horizontal resolution simulations yield in many, but not all, cases a better agreement of temperature, precipitation, humidity, and global radiation with observation data than simulations with 7 km resolution, especially during the summer half year. At 2.8 km resolution, the model also is well able to capture the mechanisms generating small-scale features, e.g. wind systems. However, the added value is highly dependent on region and altitude. In general, we conclude that high-resolution climate modeling allows studying the impact of climatological parameters on regional scales. It produces encouraging results and has a high potential for applications and direct use in regional and local impact models and impact studies.

Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Forschungsbereich Troposphäre (IMK-TRO)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.1127/metz/2016/0701
ISSN: 0941-2948
URN: urn:nbn:de:swb:90-539603
KITopen ID: 1000053960
HGF-Programm 12.01.02; LK 01
Erschienen in Meteorologische Zeitschrift
Band 25
Heft 3
Seiten 291-304
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Schlagworte regional climate modeling; COSMO-CLM added value of high resolution input data for regional impact studies
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