Download or read book Quantifying Reactive Biogenic Volatile Organic Compounds written by Nicole Christine Bouvier-Brown and published by . This book was released on 2008 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biology Controls and Models of Tree Volatile Organic Compound Emissions written by Ülo Niinemets and published by Springer Science & Business Media. This book was released on 2013-07-08 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant-driven volatile organic compound (BVOC) emissions play a major role in atmospheric chemistry, including ozone and photochemical smog formation in the troposphere, and they extend the atmospheric lifetime of the key greenhouse gas, methane. Furthermore, condensation of photo-oxidation products of BVOCs leads to formation of secondary organic aerosols with profound implications for the earth's solar radiation budget and climate. Trees represent the plant life form that most contributes to BVOC emissions, which gives global forests a unique role in regulating atmospheric chemistry. Written by leading experts in the field, the focus is on recent advancements in understanding the controls on plant-driven BVOC emissions, including efforts to quantitatively predict emissions using computer models, particularly on elicitation of emissions under biotic and abiotic stresses, molecular mechanisms of volatile synthesis and emission and the role of emissions in plant stress tolerance.
Download or read book Quantifying the Ecosystem scale Emission and Deposition Fluxes of Biogenic Volatile Organic Compounds BVOC and Their Oxidation Products Above Plant Canopies written by Jeong-Hoo Park and published by . This book was released on 2012 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biogenic volatile organic compounds (BVOC) are one of the most important chemical classes in tropospheric chemistry associated with ozone and secondary organic aerosol formation. Nevertheless, their emission and deposition rates remain unknown for many potentially important plant species due to lack of measurements. Moreover, the number of BVOC species reported for flux measurement by current techniques has been limited to a small fraction of the number of compounds actually emitted or deposited. Thus, large uncertainties still exist in estimating the ecosystem-scale fluxes of BVOCs and their oxidation products (OVOC). Two intensive field observation campaigns in different vegetation ecosystems took place in summer 2009 and 2010. The Biosphere Effects on AeRosols and Photochemistry EXperiment field campaign during summer 2009 (BEARPEX 2009, June 15 - July 31) was made in a Ponderosa pine plantation on the western slope of the Sierra Nevada Mountain range in California. During summer 2010 (June 25 - July 26), another intensive BVOC concentration and flux measurement campaign was conducted as part of a one-year continuous field campaign (CITRUS 2010, October 2009 - November 2010) in an orange orchard in the Central Valley of California near Visalia. Through these two field campaigns, this dissertation presents the ecosystem-atmosphere exchange of a wide range of BVOC and OVOC by coupling state of the art VOC measurement techniques (proton transfer reaction mass spectrometry; PTR-MS, and proton transfer reaction - time of flight - mass spectrometry; PTR-TOF-MS) with a well-established micrometeorological approach (eddy-covariance method; EC). Ambient concentrations of BVOC and OVOC were simultaneously measured for investigating fluxes and vertical gradients in both field sites along with the meteorological parameters. From BEARPEX 2009, I developed an approach of using the flux and gradient relationship from species which could be measured quickly enough to use the EC flux method (e.g. 5 Hz) to determine the eddy diffusivity (K), the apply that K to estimate the flux of species for which sufficiently fast measurements were not available to use the EC method. In the past, K had been inferred from heat, H2O and CO2 which don't have similar exchange characteristics as BVOC, thus I suggest using a universal K derived from multiple BVOC can more accurately be applied where PTR-MS measurements are conducted. In the CITRUS field campaign we simultaneously used PTR-MS for flux measurements of 3 species and vertical concentration gradient measurements of 27 species, and PTR-TOF-MS for flux and concentration measurements of a much fuller suite of VOCs above the plant canopy. Using the PTR-TOF-MS we demonstrate for the first time that there were significant emission for 27 VOC species for which concentration is commonly measured by PTR-MS, demonstrating not only the strong potential in use of PTR-TOF-MS in EC flux application but also possible underestimation in current knowledge about BVOC emission from land vegetation. For example, acetic acid was missed in flux measurements by the PTR-MS technique; however, acetic acid was here observed to be the third largest emission of any VOC species in the Orange orchard. I demonstrate for the first time how the application of PTR-TOF-MS can expand our observational capabilities and changes the scope of understanding of VOC exchanges at atmosphere-biosphere interface. Previous work has mostly focused on quantifying emission strength from vegetation for a limited number of BVOC species. However, the results from flux measurements performed during CITRUS 2010 show the existence of significant deposition flux of BVOC and their oxidation products in addition to their emissions. Additionally, active ecosystem-atmosphere exchanges of the vast majority of the VOCs observed (at least 494 species) were discovered by applying a new approach (time shifted absolute value covariance). Through this measurement and analysis, I proved the existence of ecosystem-scale exchanges of species showing vast majority of VOC have bi-directional flux - both upward and downward. This observation is unprecedented, and revealed that most VOC species have at least some active exchange between the biosphere and atmosphere. The observational evidence of active VOC exchanges in two independent ecosystems in this dissertation provides significant insights of interaction between the biosphere and atmosphere, coupling the VOC exchange and photochemistry within and above the plant canopy.
Download or read book Chamber Study of Biogenic Volatile Organic Compounds written by Zhujun Yu and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biogenic Volatile Organic Compounds in the Atmosphere written by Günter Helas and published by Balogh Scientific Books. This book was released on 1997 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reactive Hydrocarbons in the Atmosphere written by C. Nicholas Hewitt and published by Elsevier. This book was released on 1998-10-20 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vast family of volatile organic compounds plays a central role in the chemistry of the Earth's atmosphere. Reactive Hydrocarbons in the Atmosphere provides comprehensive and up-to-date reviews covering all aspects of the behavior, sources, occurrence, and chemistry of these compounds. The book considers both biogenic and anthropogenic sources, plus their effects in the atmosphere at local, regional, and global scales. Covers a major component of atmospheric chemistry and air pollution Considers both natural background chemistry and pollution processes Provides authoritative reviews for a wide range of audiences
Download or read book Volatile Organic Compounds in the Atmosphere written by Ralf Koppmann and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every day, large quantities of volatile organic compounds (VOCs) are emitted into the atmosphere from both anthropogenic and natural sources. The formation of gaseous and particulate secondary products caused by oxidation of VOCs is one of the largest unknowns in the quantitative prediction of the earth’s climate on a regional and global scale, and on the understanding of local air quality. To be able to model and control their impact, it is essential to understand the sources of VOCs, their distribution in the atmosphere and the chemical transformations which remove these compounds from the atmosphere. In recent years techniques for the analysis of organic compounds in the atmosphere have been developed to increase the spectrum of detectable compounds and their detection limits. New methods have been introduced to increase the time resolution of those measurements and to resolve more complex mixtures of organic compounds. Volatile Organic Compounds in the Atmosphere describes the current state of knowledge of the chemistry of VOCs as well as the methods and techniques to analyse gaseous and particulate organic compounds in the atmosphere. The aim is to provide an authoritative review to address the needs of both graduate students and active researchers in the field of atmospheric chemistry research.
Download or read book Proton Transfer Reaction Mass Spectrometry written by Andrew M. Ellis and published by John Wiley & Sons. This book was released on 2013-12-17 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proton Transfer Reaction Mass Spectrometry (PTR-MS) is a rapidly growing analytical technique for detecting and identifying very small quantities of chemical compounds in air. It has seen widespread use in atmospheric monitoring and food science and shows increasing promise in applications such as industrial process monitoring, medical science and in crime and security scenarios. Written by leading researchers, this is the first book devoted to PTR-MS and it provides a comprehensive account of the basic principles, the experimental technique and various applications, thus making this book essential reading for researchers, technicians, postgraduate students and professionals in industry. The book contains nine chapters and is divided into two parts. The first part describes the underlying principles of the PTR-MS technique, including • the relevant ion-molecule chemistry • thermodynamics and reaction kinetics • a discussion of ion sources, drift tubes and mass spectrometers • practical aspects of PTR-MS, including calibration. The second part of the book turns its attention to some of the many applications of PTR-MS, demonstrating the scope and benefits, as well as the limitations, of the technique. The chapters that make up the second part of the book build upon the material presented in the first part and are essentially self-contained reviews focusing on the following topics: • environmental science • food science • medicine • homeland security, and • applications of PTR-MS in liquid analysis.
Download or read book Rethinking the Ozone Problem in Urban and Regional Air Pollution written by National Research Council and published by National Academies Press. This book was released on 1992-02-01 with total page 525 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Biogeochemistry of Forested Catchments in a Changing Environment written by Egbert Matzner and published by Springer Science & Business Media. This book was released on 2004-07-12 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: The stability of forest ecosystems is affected by changes of environment conditions, like by increasing temperatures, increasing atmospheric CO2 and decreasing deposition rates of nutrients and acidity. This volume integrates the results of long term interdisciplinary ecosystem research at two forested watersheds in Germany with special emphasis on the biogeochemistry of carbon, dissolved organic matter and mineral elements in response to changing environmental conditions and management. Despite the reduction in acidic deposition, forest ecosystems are still threatened by soil acidification, nutrient depletion and eutrophication and criteria of sustainability are not yet achieved. The results highlight the complex interactions between vegetation, animals and soils in terrestrial ecosystems that are triggered by changes in environmental conditions.
Download or read book Trace Gas Emissions by Plants written by and published by Academic Press. This book was released on 2012-12-02 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many trace gases are exchanged between the atmosphere and the biosphere. Although much research has been published on the photosynthetic exchanges of carbon dioxide, oxygen, and water vapor, this book focuses on the importance of biogenic trace gases on atmosphere chemistry and ecosystem stability. Included are methane and its effect on the radiative properties of the atmosphere, hydrocarbons (isoprene and monoterpenes), and their role in the production of ozone and carbon monoxide. Also covered are sulfur and nitrogen gases, both of which can lead to ecosystem acidification. The biochemistry and physiology of production of these and other gases are investigated. Plant physiologists, ecologists, and atmospheric chemists and modelers will benefit from this book.
Download or read book Water Carbon Dynamics in Eastern Siberia written by Takeshi Ohta and published by Springer. This book was released on 2019-07-01 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the water and carbon cycle system in the permafrost region of eastern Siberia, Providing vitalin sights into how climate change has affected the permafrost environment in recent decades. It analyzes the relationships between precipitation and evapotranspiration, gross primary production and runoff in the permafrost regions, which differ from those intropical and temperate forests. Eastern Siberia is located in the easternmost part of the Eurasian continent, and the land surface with underlying permafrost has developed over a period of seventy thousand years. The permafrost ecosystem has specific hydrological and meteorological characteristics in terms of the water and carbon dynamics, and the current global warming and resulting changes in the permafrost environment are serious issues in the high-latitude regions. The book is a valuable resource for students, researchers and professionals interested in forest meteorology and hydrology, forest ecology, and boreal vegetation, as well as the impact of climate change and water-carbon cycles in permafrost and non-permafrost regions.
Download or read book Ocean Atmosphere Interactions of Gases and Particles written by Peter S. Liss and published by Springer. This book was released on 2013-12-18 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: The oceans and atmosphere interact through various processes, including the transfer of momentum, heat, gases and particles. In this book leading international experts come together to provide a state-of-the-art account of these exchanges and their role in the Earth-system, with particular focus on gases and particles. Chapters in the book cover: i) the ocean-atmosphere exchange of short-lived trace gases; ii) mechanisms and models of interfacial exchange (including transfer velocity parameterisations); iii) ocean-atmosphere exchange of the greenhouse gases carbon dioxide, methane and nitrous oxide; iv) ocean atmosphere exchange of particles and v) current and future data collection and synthesis efforts. The scope of the book extends to the biogeochemical responses to emitted / deposited material and interactions and feedbacks in the wider Earth-system context. This work constitutes a highly detailed synthesis and reference; of interest to higher-level university students (Masters, PhD) and researchers in ocean-atmosphere interactions and related fields (Earth-system science, marine / atmospheric biogeochemistry / climate). Production of this book was supported and funded by the EU COST Action 735 and coordinated by the International SOLAS (Surface Ocean- Lower Atmosphere Study) project office.
Download or read book Indoor Environment written by Lidia Morawska and published by John Wiley & Sons. This book was released on 2006-12-13 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering the fundamentals of air-borne particles and settled dust in the indoor environment, this handy reference investigates: * relevant definitions and terminology, * characteristics, * sources, * sampling techniques and instrumentation, * exposure assessment, * monitoring methods. The result is a useful and comprehensive overview for chemists, physicists and biologists, postgraduate students, medical practitioners, occupational health professionals, building owners and managers, building, construction and air-conditioning engineers, architects, environmental lawyers, government and regulatory professionals.
Download or read book Plant Volatile Analysis written by Hans F. Linskens and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern Methods of Plant Analysis When the handbook Modern Methods ofPlant Analysis, was first introduced in 1954, the considerations were: 1. the dependence of scientific progress in biologyon the improvement of existing and the introduction of new methods; 2. the difficulty in finding many new analytical methods in specialized journals which are normally not accessible to experimental plant biologists; 3. the fact that in the methods sections of papers the description of methods is frequently so compact, or even sometimes so incomplete, that it is difficult to reproduce experiments. These considerations still stand today. The series was highly successful, seven volumes appearing between 1956 and 1964. Since there is still today a demand for the old series, the publisher has decided to resume publication of Modern Methods ofPlant Analysis.It is hoped that the NewSeries willbejust as acceptable to those working in plant sciences and related fields as the early volumes undoubtedlywere.It is difficult to single out the major reasons for the success of any publication, but we believe that the methods published in the first series were up-to-date at the time and presented in a waythat made description, as applied to plant material, complete in itselfwith little need to consult other publications. Contribution authors have attempted to follow these guidelines in this New Series of volumes. Editorial The earlier series of Modern Methods ofPlant Analysis was initiated by Michel V.
Download or read book Eddy Covariance written by Marc Aubinet and published by Springer Science & Business Media. This book was released on 2012-01-18 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: This highly practical handbook is an exhaustive treatment of eddy covariance measurement that will be of keen interest to scientists who are not necessarily specialists in micrometeorology. The chapters cover measuring fluxes using eddy covariance technique, from the tower installation and system dimensioning to data collection, correction and analysis. With a state-of-the-art perspective, the authors examine the latest techniques and address the most up-to-date methods for data processing and quality control. The chapters provide answers to data treatment problems including data filtering, footprint analysis, data gap filling, uncertainty evaluation, and flux separation, among others. The authors cover the application of measurement techniques in different ecosystems such as forest, crops, grassland, wetland, lakes and rivers, and urban areas, highlighting peculiarities, specific practices and methods to be considered. The book also covers what to do when you have all your data, summarizing the objectives of a database as well as using case studies of the CarboEurope and FLUXNET databases to demonstrate the way they should be maintained and managed. Policies for data use, exchange and publication are also discussed and proposed. This one compendium is a valuable source of information on eddy covariance measurement that allows readers to make rational and relevant choices in positioning, dimensioning, installing and maintaining an eddy covariance site; collecting, treating, correcting and analyzing eddy covariance data; and scaling up eddy flux measurements to annual scale and evaluating their uncertainty.
Download or read book Air Pollution Modeling and its Application XXVI written by Clemens Mensink and published by Springer Nature. This book was released on 2019-11-23 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current developments in air pollution modeling are explored as a series of contributions from researchers at the forefront of their field. This newest contribution on air pollution modeling and its application is focused on local, urban, regional and intercontinental modeling; emission modeling and processing; data assimilation and air quality forecasting; model assessment and evaluation; atmospheric aerosols. Additionally, this work also examines the relationship between air quality and human health and the effects of climate change on air quality. This work is a collection of selected papers presented at the 36th International Technical Meeting on Air Pollution Modeling and its Application, held in Ottawa, Canada, May 14-18, 2018. The book is intended as reference material for students and professors interested in air pollution modeling at the graduate level as well as researchers and professionals involved in developing and utilizing air pollution models.
