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Assessing The Aerosol Impact On Southern West African Clouds And Atmospheric Dynamics
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Book Synopsis Assessing the Aerosol Impact on Southern West African Clouds and Atmospheric Dynamics by : Deetz, Konrad
Download or read book Assessing the Aerosol Impact on Southern West African Clouds and Atmospheric Dynamics written by Deetz, Konrad and published by KIT Scientific Publishing. This book was released on 2018-01-30 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Assessing the Aerosol Impact on Southern West African Clouds and Atmospheric Dynamics by : Konrad Deetz
Download or read book Assessing the Aerosol Impact on Southern West African Clouds and Atmospheric Dynamics written by Konrad Deetz and published by . This book was released on 2020-10-09 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.
Book Synopsis Atmospheric Moisture Effects on Deep Convection in the Western Mediterranean by : Caldas-Alvarez, Alberto
Download or read book Atmospheric Moisture Effects on Deep Convection in the Western Mediterranean written by Caldas-Alvarez, Alberto and published by KIT Scientific Publishing. This book was released on 2019-10-24 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Contrails and Climate Engineering - Process Studies on Natural and Artificial High-Level Clouds and Their Impact on the Radiative Fluxes by : Gruber, Simon
Download or read book Contrails and Climate Engineering - Process Studies on Natural and Artificial High-Level Clouds and Their Impact on the Radiative Fluxes written by Gruber, Simon and published by KIT Scientific Publishing. This book was released on 2019-03-22 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Convective precipitation simulated with ICON over heterogeneous surfaces in dependence on model and land-surface resolution by : Singh, Shweta
Download or read book Convective precipitation simulated with ICON over heterogeneous surfaces in dependence on model and land-surface resolution written by Singh, Shweta and published by KIT Scientific Publishing. This book was released on 2021-08-16 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Perspectives on warm conveyor belts - sensitivities to ensemble configuration and the role for forecast error by : Pickl, Moritz
Download or read book Perspectives on warm conveyor belts - sensitivities to ensemble configuration and the role for forecast error written by Pickl, Moritz and published by KIT Scientific Publishing. This book was released on 2023-03-30 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Representation of warm conveyor belts in sub-seasonal forecast models and the link to Atlantic-European weather regimes by : Wandel, Jan Lucas
Download or read book Representation of warm conveyor belts in sub-seasonal forecast models and the link to Atlantic-European weather regimes written by Wandel, Jan Lucas and published by KIT Scientific Publishing. This book was released on 2023-05-25 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Near future changes of compound extreme events from an ensemble of regional climate simulations by : Sedlmeier, Katrin
Download or read book Near future changes of compound extreme events from an ensemble of regional climate simulations written by Sedlmeier, Katrin and published by KIT Scientific Publishing. This book was released on 2020-01-16 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aerosol-Cloud Interactions from Urban, Regional, to Global Scales by : Yuan Wang
Download or read book Aerosol-Cloud Interactions from Urban, Regional, to Global Scales written by Yuan Wang and published by Springer. This book was released on 2015-05-05 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The studies in this dissertation aim at advancing our scientific understandings about physical processes involved in the aerosol-cloud-precipitation interaction and quantitatively assessing the impacts of aerosols on the cloud systems with diverse scales over the globe on the basis of the observational data analysis and various modeling studies. As recognized in the Fifth Assessment Report by the Inter-government Panel on Climate Change, the magnitude of radiative forcing by atmospheric aerosols is highly uncertain, representing the largest uncertainty in projections of future climate by anthropogenic activities. By using a newly implemented cloud microphysical scheme in the cloud-resolving model, the thesis assesses aerosol-cloud interaction for distinct weather systems, ranging from individual cumulus to mesoscale convective systems. This thesis also introduces a novel hierarchical modeling approach that solves a long outstanding mismatch between simulations by regional weather models and global climate models in the climate modeling community. More importantly, the thesis provides key scientific solutions to several challenging questions in climate science, including the global impacts of the Asian pollution. As scientists wrestle with the complexities of climate change in response to varied anthropogenic forcing, perhaps no problem is more challenging than the understanding of the impacts of atmospheric aerosols from air pollution on clouds and the global circulation.
Book Synopsis Assessing the Aerosol Direct, Semi-Direct and Indirect Effects Using Global Circulation Model Simulation Results by : Huilin Huang
Download or read book Assessing the Aerosol Direct, Semi-Direct and Indirect Effects Using Global Circulation Model Simulation Results written by Huilin Huang and published by . This book was released on 2017 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aerosols come from both natural and anthropogenic sources and contribute large uncertainties to estimates of the Earth's changing energy budget. It is thus of great importance to understand the mechanism through which aerosols play a role on global climate. In this thesis, we investigate the direct and indirect effect of aerosols on global and regional climate variability (e.g. West Africa, South Asia and East Asia) using an atmospheric general circulation model, GFS (Global Forecast System) coupled with SSiB2 (the second version of Si mplified Simple Biosphere Model). The three-dimensional aerosol data from the Goddard Chemistry Aerosol Radiation and Transport (GOCART) model has been adopted in this study. We first analyze the direct effect of aerosols, especially absorption aerosols, on global and regional energy budget, precipitation, and surface temperature and the mechanism involved. For instance, we find the dust aerosol in North Africa produces a heating in the atmosphere, which generates a cyclonic circulation in middle layer over Sahel region, which further brings about upward motion in the lower level and results in precipitation increase by 0.96 mm/day in June-July-August. We also examine the impact of aerosols on ice clouds effective radius by applying an advanced ice cloud parameterization in the GCM. We find that increased aerosol loading reduces ice crystal size due to aerosol first indirect effect, with the maxima occurs in South Asia and North Indian Ocean. Ice clouds with smaller crystal sizes can absorb both shortwave and longwave radiation, thus resulting in less downward solar flux and less outgoing longwave on top of atmosphere (TOA). Global mean net radiation change on TOA is about 0.5W/m2 and its sign is largely dependent on the relative magnitude of shortwave and longwave change and precipitation changes primarily respond to cooling/warming of the atmosphere. Lastly, we use sulfate data in both pre-industrial and present-day case to test the impact of aerosols on liquid cloud effective radius. We find aerosols can act as cloud condensation nuclei, and hence change the shortwave optical properties of liquid clouds. Radiative cooling occurs globally because smaller droplets size leads to increased cloud albedo. The mean value is about 2.5W/m2. Moreover, most radiative cooling occurs in North Hemisphere, where anthropogenic sulfate aerosols locate, such as East Asia and North America. We also compare the radiative forcing of aerosol direct and indirect effect on both ice clouds and liquid clouds on global as well as the three monsoon regions. All aerosol effects result in radiative cooling on global scale. However, surface net radiation changes are different in West Africa, East and South Asia, which relates to local atmospheric conditions such as cloud cover and convection. Aerosol direct effect and aerosol indirect effect for liquid clouds have comparable impact on surface net radiation change (more than -3 W/m2), while aerosol indirect effects for ice cloud are smaller (~1 W/m2) because of the negative feedback from cloud cover. Decreased land surface temperature can be found over North Hemisphere continent in all three effects, especially over higher latitude, with varied magnitude. The precipitation changes are less predictable. Aerosol indirect effects on averaged global precipitations are close to zero because the precipitation changes are different or even opposite in different regions. The effect of aerosol on precipitations can be influenced by convection strength, topography, and even the relative location of aerosols and monsoon system.
Book Synopsis Towards a Comprehensive Analysis of the Impact Biomass Burning Aerosols Have on the West African Monsoon by : Osinachi Ajoku
Download or read book Towards a Comprehensive Analysis of the Impact Biomass Burning Aerosols Have on the West African Monsoon written by Osinachi Ajoku and published by . This book was released on 2020 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation is motivated by the lack of research depth on the influence biomass burning produced aerosols impose on West African monsoon dynamics during daily time scales. The impacts of such aerosols on atmospheric thermodynamics and cloud microphysics are investigated using a combination of satellite observations and global climate model simulations. Using observations, we find (1) suppression of precipitation rates over the Guinea coastline with elevated aerosol transport and (2) an increase in rates with decreased aerosol amounts. Decreases in the amount of shortwave radiation reaching the surface over land and ocean attributed to increases in low-level cloud coverage and the absorptive nature of biomass aerosols observed in nature on dirty conditions are matched with reductions in convective available potential energy (CAPE), vertical air mixing essential for deep-convection cloud cover. Increased aerosol content is also associated with decreases in cloud droplet effective radius, a defining feature of aerosol indirect effects. Guided by available observations, model experiments are designed for NCAR's CESM2 with meteorology being nudged to observations using MERRA2 reanalysis to visualize data not available through such observations. Simulations successfully reproduce aerosol transport and corresponding precipitation changes found in observations. However, this model is not in agreement with changes in low-level cloud fraction which leads to increases (decreases) in shortwave radiation reaching the surface (top of atmosphere) during dirty conditions. Our model simulations show that aerosol semidirect and indirect effects interact together to alter cloud formation processes and ultimately control the precipitation response. Throughout the equatorial Atlantic, smoke aerosols impact the structure of stratocumulus to cumulus transition (SCT) through an alteration of atmospheric stability and moisture availability. Boundary layer deepening and increasing sea surface temperatures put the location of this transition within the Gulf of Guinea. Increased low-level clouds occur over the Atlantic cold tongue where aerosol layers reside above low cloud tops, reflecting a negative aerosol semidirect effect. Coupled with significant changes in cloud top height and tropospheric stability further South, these aerosol effects combine to extend in space during increased aerosol loading episodes.
Book Synopsis Aerosols and Precipitation Over Africa by : Akintomide A. Akinsanola
Download or read book Aerosols and Precipitation Over Africa written by Akintomide A. Akinsanola and published by Elsevier. This book was released on 2025-01-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unravels the complex interplay between airborne particles and precipitation patterns across the vast African continent. Aerosols and Precipitation Over Africa is an essential exploration of the intricate relationship between atmospheric aerosols and precipitation over Africa’s climatically diverse regions. The book begins by closely examining the sources, properties, and distribution of aerosols over Africa. It then examines the effect of aerosols on the West African monsoon and the climate of the tropical Atlantic. The book then discusses the observation and modeling of precipitation distribution and recent cloud trends. Later chapters discuss projected changes in precipitation and expected climate-change impacts. This book is a valuable resource for environmental researchers, academics, policymakers, and anyone interested in understanding the complex interplay and the latest developments in aerosols and precipitation over Africa. Members of the Royal Meteorological Society are eligible for a 35% discount on all Developments in Weather and Climate Science series titles. See the RMetS member dashboard for the discount code. Provides detailed regional/sub-regional insights, and impacts on local climate Encompasses findings from both observations and climate models Looks to the future at projected changes and coming challenges in aerosol-precipitation over Africa
Book Synopsis Manual on Codes by : World Meteorological Organization
Download or read book Manual on Codes written by World Meteorological Organization and published by . This book was released on 2001 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Academies of Sciences, Engineering, and Medicine Publisher :National Academies Press ISBN 13 :0309443458 Total Pages :53 pages Book Rating :4.3/5 (94 download)
Book Synopsis Opportunities to Improve Representation of Clouds and Aerosols in Climate Models with Classified Observing Systems by : National Academies of Sciences, Engineering, and Medicine
Download or read book Opportunities to Improve Representation of Clouds and Aerosols in Climate Models with Classified Observing Systems written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2016-08-31 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most significant and uncertain aspects of climate change projections is the impact of aerosols on the climate system. Aerosols influence the climate indirectly by interacting with nearby clouds leading to small changes in cloud cover, thickness, and altitude, which significantly affect Earth's radiative balance. Advancements have been made in recent years on understanding the complex processes and atmospheric interactions involved when aerosols interact with surrounding clouds, but further progress has been hindered by limited observations. The National Academies of Sciences, Engineering, and Medicine organized a workshop to discuss the usefulness of the classified observing systems in advancing understanding of cloud and aerosol interactions. Because these systems were not developed with weather and climate modeling as a primary mission objective, many participants said it is necessary for scientists to find creative ways to utilize the data. The data from these systems have the potential to be useful in advancing understanding of cloud and aerosol interactions. This publication summarizes the presentations and discussions from the workshop.
Book Synopsis Extremes in Atmospheric Processes and Phenomenon: Assessment, Impacts and Mitigation by : Pallavi Saxena
Download or read book Extremes in Atmospheric Processes and Phenomenon: Assessment, Impacts and Mitigation written by Pallavi Saxena and published by Springer Nature. This book was released on 2022-05-26 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Economics and Policy of Energy and Environmental Sustainability by : Narendra N. Dalei
Download or read book Economics and Policy of Energy and Environmental Sustainability written by Narendra N. Dalei and published by Springer Nature. This book was released on 2022-11-23 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the linkages among economic development, energy, and environment. An increase in economic activity is correlated with a higher level of energy consumption, which in turn leads to an increase in environmental pollution. Due to the influence of greenhouse gases, the higher the concentration of pollutants in the atmosphere, the higher the temperature, which ultimately leads to climate change. Under these imminent dangers, the role of economic and energy efficiency policies becomes important for ecological sustainability. The present policies, however, in various instances, have failed to address these issues. Hence, this book embarks not only to suggest modifications to improve the efficacy of the current policies but also to recommend to the policymakers, new and more effective policies for their respective countries. The book is bifurcated into two sections: The Economics and Policy of Sustainable Energy section discusses renewable energy policy responses to observed Impact of climate change using DPSIR Framework; the energy utilization strategies for transportation and commercial activities of Charland Bangladesh; the relationship of market globalization with the Indian energy sector; the socioecological effects of globalization from an energy perspective brought to a local standpoint; the seasonal disaster-induced energy consumption strategies of the char-dwellers of Bangladesh with respect to their domestic chores and agricultural activities; trends in GDP growth and energy usage in India; cross-border trade of electricity; and the events that the oil and gas industry has already faced and possible strategies it can adopt to overcome the recession caused by the COVID-19 pandemic. The Economics and Policy of Environmental Sustainability section analyses topics such as the role of hyper-globalization in spreading the pandemic across countries as threat to human ecology; the current scenario of environmental consequences, and future prospects of plastic pollution; the surface air temperature anomalies over selected countries of Africa; the impaired roles of the female gender in community natural resource exploitation in Ndop; the operational expansion strategies for garnering better output in terms of livelihood and conservation; opportunity for environmental justice and rethinking global community; linking indigenous traditional knowledge and sustainable development goals in the North-Western Himalayas; and recommendations to manage dry forest carbon stock. This book is a rich resource for policymakers, guiding them through untraveled pathways. Moreover, it is an extremely helpful resource for researchers, practitioners, industry professionals as well as students in the fields of energy, environment, and sustainable development with flavour of economics and policy.
Book Synopsis Aerosol--cloud--climate Interactions by : Peter Victor Hobbs
Download or read book Aerosol--cloud--climate Interactions written by Peter Victor Hobbs and published by . This book was released on 1993 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aerosol and clouds play important roles in determining the earth's climate, in ways that we are only beginning to comprehend. In conjunction with molecular scattering from gases, aerosols, and clouds determine in part what fraction of solar radiation reaches the earth's surface and what fraction of the longwave radiation from the earth escapes to space. This book provides an overview of the latest. research on atmospheric aerosols and clouds and their effects on global climate
