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The Added Value of Large-Eddy and Storm-Resolving Models for Simulating Clouds and Precipitation

Stevens, Bjorn; Acquistaoace, Claudia; Hansen, Akio; Heinze, Rieke; Klinger, Carolin; Klocke, Daniel; Rybka, Harald; Schubotz, Wiebke; Windmiller, Julia; Adamidis, Panagiotis; Arka, Ioanna; Barlakas, Vasileios; Biercamp, Joachim; Brueck, Matthias; Brune, Sebastian; Buehler, Stefan A.; Burkhardt, Ulrike; Cioni, Guido; Costa-Suros, Montserrat; Crewell, Susanne; ... mehr

Abstract:
More than one hundred days were simulated over very large domains with fine (0.156 km to 2.5 km) grid spacing for realistic conditions to test the hypothesis that storm (kilometer) and large-eddy (hectometer) resolving simulations would provide an improved representation of clouds and precipitation in atmospheric simulations. At scales that resolve convective storms (storm-resolving for short), the vertical velocity variance becomes resolved and a better physical basis is achieved for representing clouds and precipitation. Similarly to past studies we found an improved representation of precipitation at kilometer scales, as compared to models with parameterized convection. The main precipitation features (location, diurnal cycle and spatial propagation) are well captured already at kilometer scales, and refining resolution to hectometer scales does not substantially change the simulations in these respects. It does, however, lead to a reduction in the precipitation on the time-scales considered – most notably over the ocean in the tropics. Changes in the distribution of precipitation, with less frequent extremes are also found in simulations incorporating hectometer scales. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000117412
Veröffentlicht am 18.07.2020
Originalveröffentlichung
DOI: 10.2151/jmsj.2020-021
Scopus
Zitationen: 3
Web of Science
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Forschungsbereich Troposphäre (IMK-TRO)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 0026-1165, 2186-9057
KITopen-ID: 1000117412
HGF-Programm 12.01.01 (POF III, LK 01)
Clouds in a pertubed atmosphere
Erschienen in Journal of the Meteorological Society of Japan
Band 98
Heft 2
Seiten 395-435
Vorab online veröffentlicht am 14.12.2019
Schlagwörter storm-resolving models, large-eddy simulation, clouds, precipitation, climate change, cloud-resolving models
Nachgewiesen in Web of Science
Scopus
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