Author: Ivar S.A. Isaksen Publisher: Springer Science & Business Media ISBN: 9400929137 Category : Science Languages : en Pages : 433
Book Description
The main objective of the workshop was to increase our knowledge of ozone formation and distribution in the troposphere, its relation to precursor (NO~ and HC species) distribution, how it is affected by transport processes in the troposphere, and to show how the increasing levels of ozone can cause environmental problem. The focus was on the interaction of ozone on regional and global scales. There is mounting evidence that such interactions occur and that the ozone levels are increasing in most of the Northern Hemisphere tropo sphere. A likely source of ozone increase is human activity. As result of this, tropospheric climate may change significantly within a few decades, either through direct effects by ozone itself or indirectly through its effect on other radiatively active trace species. Further more, ozone may have adverse effects on vegetation over large continental areas due to enhanced levels which have been measured to take place. As it is well known that ozone plays a key role in the oxidation of a large number of chemical species in the troposphere, natural as well as man-made, the atmospheric distribution of important trace species like sulfur dioxide, nitrogen oxides and hydrocarbons could be markedly changed as a result of ozone changes. The rapidly increasing interest in tropospheric ozone, and the key role ozone plays in several atmospheric areas as well the obvious increase in the tropospheric concentration of ozone made ozone a natural choice as a topic for the workshop.
Author: Madhoolika Agrawal Publisher: Cambridge Scholars Publishing ISBN: 9781527570573 Category : Languages : en Pages :
Book Description
This book presents updated and relevant information on the tropospheric ozone problem and its effects on the wellbeing of plants and human health. The contributions here present in-depth knowledge about history, pattern, sources, environmental factors and other necessary aspects of the tropospheric ozone problem. The book provides a balanced view of current developments on the effects of the tropospheric ozone on plant and human health, crop production and ecosystem services. In addition to the effects of the tropospheric ozone on growth and physiological and biochemical traits, it also considers the molecular basis of plant responses to ozone. The book encompasses a holistic view on various interconnected issues of ozone pollution, and will appeal to scientists from all over the world.
Author: S.B. Agrawal Publisher: Cambridge Scholars Publishing ISBN: 1527574970 Category : Mathematics Languages : en Pages : 653
Book Description
This book presents updated and relevant information on the tropospheric ozone problem and its effects on the plants and human health. The contributions here present in-depth knowledge about history, pattern, sources, environmental factors and other necessary aspects of the tropospheric ozone problem. The book provides a balanced view of current developments on the effects of the tropospheric ozone on plant and human health, crop production and ecosystem services. In addition to the effects of the tropospheric ozone on growth and physiological and biochemical traits, it also considers the molecular basis of plant responses to ozone. The book encompasses a holistic view on various interconnected issues of ozone pollution, and will appeal to scientists from all over the world.
Author: H. Niki Publisher: Springer Science & Business Media ISBN: 3642782116 Category : Science Languages : en Pages : 431
Book Description
The Arctic troposphere (0 to ca. 8 km) plays an important role in environmental concerns for global change. It is a unique chemical reactor influenced by human activity and the Arctic ocean. It is surrounded by industrialized continents that in winter contribute gaseous and particulate pollution (Arctic haze). It is underlain by the flat Arctic ocean from which it is separated by a crack-ridden ice membrane 3 to 4 m thick. Ocean to atmosphere exchange of heat, water vapor and marine biogenic gases influence the composition of the reactor. From September 21 to December 21 to March 21, the region north of the Arctic circle goes from a completely sunlit situation to a completely dark one and then back to light. At the same time the lower troposphere is stably stratified. This hinders vertical mixing. During this light period, surface temperature reaches as low as -40°C. In this environment, chemical reactions involving sunlight are generally much slower than further south. Thus, the abundance of photochemically reactive compounds in the atmosphere can be high prior to polar sunrise. Between complete dark in February and complete light in April, a number of chemical changes in the lower troposphere take place.
Author: David McKee Publisher: CRC Press ISBN: 9780873714754 Category : Nature Languages : en Pages : 350
Book Description
Tropospheric ozone has long been recognized as a major environmental concern. Levels of ozone concentration have grown dramatically and the effects of ozone exposure have been examined in virtually thousands of studies worldwide. This timely new reference presents the state of the art in ozone regulation, human health effects, agricultural implications, and the economics of ozone reduction. Tropospheric Ozone guides you through the history of air pollution legislation and cites government initiatives to reduce ozone emissions. Ozone concentration data is supplied for a variety of geographic regions in examining the causes of ozone concentration and its potential effects on human populations, crops, and forests. Important issues such as crop yield, plant growth, and crop losses due to exposure are addressed, which will help develop an understanding of the economic implications of agricultural damage. New information is presented regarding risk assessment and human monitoring studies. EPA guidelines are reviewed, and potential health problems associated with ozone exposure are discussed in a practical, informative format. This valuable reference will benefit air pollution engineers, environmental consultants, government agency employees, regulators, industry professionals, health professionals, crop and soil scientists, environmental health and safety professionals, risk assessment professionals, and students in the environmental sciences.
Author: 0ystein Hov Publisher: Springer Science & Business Media ISBN: 3642587291 Category : Science Languages : en Pages : 515
Book Description
One of the principal concerns in recent years regarding the atmospheric environment has been the formation of ozone and other photo-oxidants over much of Europe in the summer. Ozone is formed in the atmosphere by a complex series of chemical reactions in the presence of sunlight from volatile organic compounds and nitrogen oxides. As the reactions take place in air flows determined by the detailed meteorological situation, the measurement, interpretation, understanding and modelling of the levels, fluxes and origins of the ozone are extremely difficult. The present volume reviews several of the currently important questions and presents detailed reports from investigators all over the continent. As such, it provides insight into the current scientific views about ozone in Europe.
Author: National Research Council Publisher: National Academies Press ISBN: 0309046319 Category : Science Languages : en Pages : 525
Book Description
Despite more than 20 years of regulatory efforts, concern is widespread that ozone pollution in the lower atmosphere, or troposphere, threatens the health of humans, animals, and vegetation. This book discusses how scientific information can be used to develop more effective regulations to control ozone. Rethinking the Ozone Problem in Urban and Regional Air Pollution discusses: The latest data and analysis on how tropospheric ozone is formed. How well our measurement techniques are functioning. Deficiencies in efforts to date to control the problem. Approaches to reducing ozone precursor emissions that hold the most promise. What additional research is needed. With a wealth of technical information, the book discusses atmospheric chemistry, the role of oxides of nitrogen (NOx) and volatile organic compounds (VOCs) in ozone formation, monitoring and modeling the formation and transport processes, and the potential contribution of alternative fuels to solving the tropospheric ozone problem. The committee discusses criteria for designing more effective ozone control efforts. Because of its direct bearing on decisions to be made under the Clean Air Act, this book should be of great interest to environmental advocates, industry, and the regulatory community as well as scientists, faculty, and students.
Author: Supriya Tiwari Publisher: Springer ISBN: 3319718738 Category : Technology & Engineering Languages : en Pages : 207
Book Description
The research and its outcomes presented here focuses on tropospheric or ground level ozone, in particular due to its surfacing as a major threat to crop productivity around the world. This book presents the ozone concentration data for a variety of geographical regions, examines the factors responsible for its increasing concentrations and its potential effects on physiological and biochemical responses culminating in crop productivity losses which, in turn may pose a serious threat to global food security. Beside this, certain ameliorative measures that could be adopted to assess ozone injury in plants are also discussed. Global climate change scenarios predict a significant increase in future tropospheric ozone concentration. Particular attention is therefore given to evaluate the effect of global climate change on ozone concentrations. Readers will also discover how yield losses due to ozone are related to changes in the socio-economic conditions of the society, especially in South Asian regions. Students and researchers studying crop and soil science, environmental scientists, risk assessment professionals and policy makers will find this book of interest.
Author: Rainer Friedrich Publisher: Springer Science & Business Media ISBN: 3642596983 Category : Science Languages : en Pages : 241
Book Description
The occurrence of high concentrations of ozone during summer episodes in the troposphere over Europe is a problem still unsolved. Although a number· of measures have been implemented that will achieve a further reduction of precursor emissions in the next years, this will not be sufficient to reduce the ozone concentration to levels below thresholds set up to protect human health and plants. Thus, further reductions of emissions of volatile organic compounds and nitrogen oxides are necessary. However, with regard to the increasing costs associated with increasing emission reduction, it is essential to implement abatement strategies, that are effective, i.e. achieving the environmental aim set up, and efficient, i. e. doing this with the least costs possible. In this book, the authors describe the features and the application of a methodology and a model system to identify effective and efficient strategies to reduce ambient concentrations of tropospheric ozone to comply with thresholds set up to protect human health, agricultural crops and ecosystems. Furthermore, macroeconomic impacts of such strategies are addressed and, as burden and benefits of these strategies are not equally distributed between countries, different burden sharing schemes are discussed. The content of this book is based on results of a comprehensive research project, the project INFOS (assessment of policy instruments for efficient ozone abatement strategies in Europe), funded by the European Commission (Directorate General XII) under the Fourth Framework Programme for research, technological development and demonstration activities.