A5005873999- Atmospheric aerosols and clouds
- Meteorological Phenomena and Simulations
- Climate variability and models
- Atmospheric chemistry and aerosols
- Tropical and Extratropical Cyclones Research
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Atmospheric and Environmental Gas Dynamics
- Astronomical Observations and Instrumentation
- Oceanographic and Atmospheric Processes
- Atmospheric Ozone and Climate
- Innovations in Educational Methods
- Infrared Target Detection Methodologies
- Simulation Techniques and Applications
- Astrophysics and Star Formation Studies
- Scientific Computing and Data Management
- Advanced Computational Techniques and Applications
- Color Science and Applications
- Surface Roughness and Optical Measurements
- Aeolian processes and effects
- Thermography and Photoacoustic Techniques
- Optical Wireless Communication Technologies
- Geography Education and Pedagogy
- Radio Wave Propagation Studies
- Methane Hydrates and Related Phenomena
Max Planck Institute for Meteorology
2014-2020
German Meteorological Service
2018-2019
Leibniz Institute for Tropospheric Research
2018-2019
Leipzig University
2015-2016
Max Planck Society
2014
Large‐eddy simulations (LES) with the new ICOsahedral Non‐hydrostatic atmosphere model (ICON) covering Germany are evaluated for four days in spring 2013 using observational data from various sources. Reference established Consortium Small‐scale Modelling (COSMO) numerical weather prediction and further standard LES codes performed used as a reference. This comprehensive evaluation approach covers multiple parameters scales, focusing on boundary‐layer variables, clouds precipitation. The...
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 test the hypothesis that storm (kilometer) and large-eddy (hectometer) resolving simulations would provide an improved representation of clouds precipitation in atmospheric simulations. At scales resolve convective storms (storm-resolving short), vertical velocity variance becomes resolved a better physical basis is achieved representing precipitation....
Abstract A configuration of the High-Altitude Long-Range Research Aircraft (HALO) as a remote sensing cloud observatory is described, and its use illustrated with results from first second Next-Generation Remote Sensing for Validation (NARVAL) field studies. Measurements NARVAL (NARVAL2) are used to highlight ability HALO, when configured in this fashion, characterize not only distribution water condensate atmosphere, but also impact on radiant energy transfer covarying large-scale...
Abstract The seasonality in large-scale meteorology and low-level cloud amount (CClow) is explored for a 5° × area the North Atlantic trades, using 12 years of ERA-Interim MODIS data, supported by 2 Barbados Cloud Observatory (BCO) measurements. From boreal winter to summer, subsiding motion changes rising motion, along with an increase sea surface temperature, clockwise turning weakening winds, reduced cold-air advection, lower-tropospheric stability (LTS), fluxes. However, CClow relatively...
Abstract. The HD(CP)2 Observational Prototype Experiment (HOPE) was performed as a major 2-month field experiment in Jülich, Germany, April and May 2013, followed by smaller campaign Melpitz, September 2013. HOPE has been designed to provide an observational dataset for critical evaluation of the new German community atmospheric icosahedral non-hydrostatic (ICON) model at scale simulations further information on land-surface–atmospheric boundary layer exchange, cloud precipitation processes,...
Abstract Deep moist convection is an inherently multiscale phenomenon with organization processes coupling convective elements to larger-scale structures. A realistic representation of the tropical dynamics demands a simulation framework that capable representing physical across wide range scales. Therefore, storm-resolving numerical simulations at 2.4 km have been performed covering Atlantic and neighboring parts for 2 months. The simulated cloud fields are combined infrared geostationary...
Abstract. Clouds and aerosols contribute the largest uncertainty to current estimates interpretations of Earth’s changing energy budget. Here we use a new-generation large-domain large-eddy model, ICON-LEM (ICOsahedral Non-hydrostatic Large Eddy Model), simulate response clouds realistic anthropogenic perturbations in serving as cloud condensation nuclei (CCN). The novelty compared previous studies is that (i) LEM run weather prediction mode with fully interactive land surface over large...
Abstract. Cirrus clouds play an important role in determining the radiation budget of earth, but many their properties remain uncertain, particularly response to aerosol variations and warming. Part reason for this uncertainty is dependence cirrus cloud on formation mechanism, which itself strongly dependent local meteorological conditions. In work, a classification system (Identification Classification or IC-CIR) introduced identify by mechanism. Using reanalysis satellite data, are...
Current climate models often predict fractional cloud cover on the basis of a diagnostic probability density function (PDF) describing subgrid‐scale variability total water specific humidity, q t , favouring schemes with limited complexity. Standard shapes are uniform or triangular PDFs, widths which assumed to scale grid‐box mean saturation s . In this study, is analysed from large‐eddy simulations for two stratocumulus, shallow cumulus, and one deep convective cases. We find that, in most...
Abstract The relationship between mesoscale convective organization, quantified by the spatial arrangement of convection, and oceanic precipitation in tropical belt is examined using output a global storm‐resolving simulation. analysis uses 2D watershed segmentation algorithm based on local maxima to isolate individual cells derive their properties. 10° scenes are analyzed phase‐space representation made number per scene mean area understand controls convection its precipitation. presence...
Abstract Over the tropical oceans, large-scale, meridional circulation drives accumulation of moist and warm air, leading to a relatively narrow, convectively active band. Therein, deep convection interacts with its heterogeneous environment—the intertropical convergence zone (ITCZ)—and organizes into multiscale structures that strongly impact Earth’s hydrological cycle radiation budget. Understanding spatial correlations interactions among convective clouds is important, but challenging....
Abstract. Cirrus clouds play an important role in determining the radiation budget of earth, but many their properties remain uncertain, particularly response to aerosol variations and warming. Part reason for this uncertainty is dependence cirrus on mechanism formation, which itself strongly dependent local meteorological conditions. In work, a classification system (Identification Classification or IC-CIR) introduced identify by formation mechanisms. Using re-analysis satellite data, are...
Abstract. Clouds and aerosols contribute the largest uncertainty to current estimates interpretations of Earth’s changing energy budget. Here we use a new-generation large-domain large-eddy model, ICON-LEM, simulate response clouds realistic anthropogenic perturbations in serving as cloud condensation nuclei (CCN). The novelty compared previous studies is that (i) LEM run weather prediction mode with fully interactive land surface over large domain, (ii) range data from various sources are...