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Drawing --- Painting --- Orme, Cosmo --- Roe, Frederick Adair
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By using COSMO-ART, highly resolved process study simulations for 2-3 July 2016 are conducted to assess the aerosol effect on the meteorological conditions of southern West Africa. The meteorological phenomenon Evening Monsoon Flow Enhancement (EMFE) is identified as highly susceptible to the aerosol direct effect, leading to a spatial shift of the EMFE front. In a second aerosol feedback chain the aerosol variation leads to a temporal shift of the stratus-to-cumulus transition.
COSMO-ART --- Wolken --- Aerosol --- Westafrikanischer Monsun --- clouds --- West African monsoon --- Nächtlicher Stratus --- COSMO-ARTaerosol --- nocturnal stratus
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High-resolution regional ensemble climate simulations with the regional climate model COSMO-CLM are performed for Southwest Germany to study the sensitivity of meteorological and hydrological variables to parameter settings. The soil-vegetation model VEG3D is implemented into COSMO-CLM to assess the impact of the lower atmospheric boundary on simulation results. A statistical-dynamical downscaling method is tested to shorten the simulation time for regional climate studies.
regional climate modelling --- climate --- sensitivity studies --- COSMO-CLM
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Dunkerley, Susan --- Fullwood, Mary --- Goldman, Debra --- Prete, Cosmo --- Siwek, Paula
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Bishops --- Lang, Cosmo Gordon --- Church of England --- History.
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Verbesserte Kenntnisse über die Prozesse im regionalen Wasserhaushalt sind wesentlich für das Verständnis von Klimaänderungen sowie die Entwicklung geeigneter Klimaanpassungsstrategien. Diese Arbeit geht der Frage nach, wie sich kurzfristige Änderungen der synoptischen Bedingungen und variierende Landoberflächeneigenschaften auf den atmosphärischen Wasserhaushalt auswirken.
Regionale Klimamodellierung --- GPS --- COSMO --- Atmosphärischer Wasserhaushalt --- Einfluss von Wetterlagen und Topographie --- Regionale Klimamodellierung --- GPS --- COSMO --- Atmosphärischer Wasserhaushalt --- Einfluss von Wetterlagen und Topographie
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During the West African Monsoon, convective systems generate the largest part of annual precipitation. We investigate their predictability by conducting high-resolution ensemble simulations with the COSMO model, focusing on the impact of the land surface. Are land-surface – atmosphere interactions in West Africa as important for precipitation forecasts as larger-scale conditions? What are the main physical processes?
soil moisture --- Bodenfeuchte --- COSMO --- numerische Wettervorhersage --- COSMOnumerical weather prediction --- Sahel --- AMMA
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In this work, various simulation methods of the effective radar reflectivity factor and its attenuation by atmospheric particles from the variables of the COSMO model have been implemented within a so-called radar forward operator, and its output was compared to measurements from the German radar network. To perform a statistically reliable model verification, contoured frequency by altitude diagrams (CFADs) were used and refined.
Radarmeteorologie --- Wolkenphysik --- Model Verification --- CFADRadar Meteorology --- CFAD --- COSMO --- Cloud Physics --- Modellverifikation
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This thesis aims to quantify the direct radiative effects of sea salt aerosol in the atmosphere. The online coupled regional scale model system COSMO-ART is extended for this objective with respect to the sea salt aerosol. Furthermore, a new sea salt optical parameterisation is developed for both the shortwave and longwave spectrum. Based on numerical simulations with the extended model system, the direct radiative effects of sea salt aerosol are investigated.
numerical modelling --- COSMO-ART --- direct radiative effects --- regional scale --- sea salt aerosol
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