Description: Das Projekt "Atmospheric convection over mid-latitude continental areas during summer: An in-depth analysis of large-eddy simulations and cumulus parameterizations" wird vom Umweltbundesamt gefördert und von University Washington durchgeführt. Atmospheric convection, which is at the core of phenomena like thunderstorms, hurricanes or tornadoes, profoundly affects the climate over various regions of the earth. It has thus long been recognized that numerical models (e.g., climate models), which are used to predict the evolution of the atmosphere, need to account for a detailed and reliable representation of convective processes. As the horizontal scale of cumulus clouds is generally smaller than the horizontal resolution of such models, convection can only be imperfectly represented. This causes large uncertainties and errors. In this project we used very high-resolution simulations to investigate the life cycle of convection and to derive new relations to constrain the behavior of the cumulus ensemble in coarser-resolution models. Implementing such relations in a climate model, we were able to reduce some of the well-known biases, especially the premature onset and precipitation peak as compared to observations.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Wolkenbildung ? Wolke ? Bewölkung ? Tornado ? Washington ? Geografische Koordinaten ? Klimaprognose ? Sommer ? Prognose ? Sturm ? Bohrkern ? Evolution ? Gewitter ? Klimamodell ? Simulation ? Kontinentales Klima ? Globales Klima ? Atmosphäre ? Klimabeeinflussung ? Lebenszyklus ? Niederschlag ? Atmosphärische Zirkulation ? Atmosphärischer Prozess ? Instationäre Strömung ? Konvektion ? coarser-resolution model ? convective parameterization ? cumulus cloud ? large eddy simulation ? precipitation diurnal cycle ?
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2009-04-01 - 2011-03-31
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