Assessing the Aerosol Impact on Southern West African Clouds and Atmospheric Dynamics


Book Description

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.







Contrails and Climate Engineering - Process Studies on Natural and Artificial High-Level Clouds and Their Impact on the Radiative Fluxes


Book Description

Two aspects of anthropogenic impacts on the atmosphere are investigated using means of numerical weather prediction. A case study is conducted to estimate the impact of such artificial clouds on the incoming solar radiation at the Earth's surface with special regard to photovoltaic power production. Furthermore, simulations are performed to assess the efficacy of injecting particles into the Arctic troposphere with the aim of modifying cirrus clouds for counteracting global warming.




Convective precipitation simulated with ICON over heterogeneous surfaces in dependence on model and land-surface resolution


Book Description

The impact of land-surface properties like vegetation, soil type, soil moisture, and the orography on the atmosphere is manifold. These features determine the evolution of the atmospheric boundary layer, convective conditions, cloud evolution and precipitation. The impact of model grid spacing and land-surface resolution on convective precipitation over heterogeneous surfaces is investigated using ICOsahedral Nonhydrostatic (ICON) simulations within the framework of the HD(CP)2 project.




Perspectives on warm conveyor belts - sensitivities to ensemble configuration and the role for forecast error


Book Description

Warm conveyor belts (WCBs) are weather systems that substantially modulate the large-scale extratropical circulation. As they can amplify forecast errors and project them onto the Rossby wave pattern, they are of high relevance for numerical weather prediction. This work elaborates on two aspects of WCBs in the context of ensemble forecasts: (1) sensitivities of WCBs to the representation of initial condition and model uncertainties, and (2) the role of WCBs for forecast error growth.




Objective identification and climatology of mesoscale high-wind features within extratropical cyclones


Book Description

Strong winds accompanying extratropical cyclones are commonly associated with various mesoscale features. This work introduces RAMEFI (RAndom-forest-based Mesoscale wind Feature Identification), an objective and flexible identification approach based on key surface characteristics to distinguish these features. RAMEFI is further applied to compile a climatology over Europe, offering a comprehensive analysis of feature frequency, distribution, and characteristics.




Representation of warm conveyor belts in sub-seasonal forecast models and the link to Atlantic-European weather regimes


Book Description

This study systematically investigates the representation of warm conveyor belts (WCBs) in large reforecast data sets of different numerical weather prediction models and evaluates the role of WCBs for the onset and life cycle of Atlantic-European weather regimes. The results emphasize the importance of accurate forecast of WCBs for sub-seasonal prediction on time scales beyond two weeks and tie the low forecast skill of blocked weather regimes over Europe to misrepresented WCBs.







Manual on Codes


Book Description




Extremes in Atmospheric Processes and Phenomenon: Assessment, Impacts and Mitigation


Book Description

This edited book first gives an overview of issues in the studies of atmospheric sciences and then elaborates on extreme events in air pollution, their assessment, impacts, and mitigation strategies. It covers general overview of factors governing in atmosphere that lead to air pollution, description about recent and hazardous air pollution episodes, emergencies and extremes in atmospheric sciences, impact studies on living organisms and atmosphere related to emergencies and possible remedies/mitigation strategies which may also include green growth strategies for management. Increase in anthropogenic activities from different sources results in very high concentrations of air pollutants in the atmospheres and they lead to cause disturbance in seasonal cycles and atmospheric phenomena, ecological imbalance and change in the quality of air. These impacts are the major cause of short-term or long-term effects on living and non-living systems. In the recent years, several instances of extremes atmosphere and air pollution related emergencies causing accidental episodes, fog, smog, health related, heat and cold wave etc. are experienced. This book brings the attention on such issues in atmospheric sciences and discuss the disaster preparedness and management plus emergencies. This book is valuable reading material for students in Environmental Science, Biological Science, Medical Science, Policy Planning, Disaster Management and Agriculture. It’s useful for environmental consultants, researchers and other professionals involved in air quality, plant, humans and disasters related research.