Spatial and Temporal Distributions of Speciated Atmospheric Mercury in Southeastern Texas PDF Download
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Author: Azucena Rivera Torres
Publisher:
ISBN:
Category : Atmospheric physics
Languages : en
Pages :
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Book Description
The purpose of this study was to investigate and compare the contribution of anthropogenic emissions to the levels of atmospheric mercury in both urban and coastal settings of southeastern Texas. Speciated atmospheric mercury measurements were obtained from the ideally located University of Houston Moody Tower and University of Houston Coastal Center from March 22, 2012- June 6, 2013 and July 26, 2013-June 6, 2013, respectively. The use of key tracer gases from various data sources as well as meteorological data from ground-based stationary monitoring facilities was used in the evaluation of high-mercury pollution plumes, the general direction of the source origin as well as seasonal and diurnal mixing ratios of the three atmospheric mercury species. At the costal site measurements showed consistently lower mixing ratios for all mercury species and had no significant mercury events recorded. The urban University of Houston Moody Tower had much higher and more dramatic fluctuations in mixing ratios for all three mercury species with two major mercury events recorded. Both events were associated with periods of low wind conditions and Houston Ship Channel origins. While the measurements collected at the urban location show consistencies with past studies conducted at the same location, the complexity of atmospheric mercury interactions prevent any indepth interpretations of the results.
Author: Azucena Rivera Torres
Publisher:
ISBN:
Category : Atmospheric physics
Languages : en
Pages :
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Book Description
The purpose of this study was to investigate and compare the contribution of anthropogenic emissions to the levels of atmospheric mercury in both urban and coastal settings of southeastern Texas. Speciated atmospheric mercury measurements were obtained from the ideally located University of Houston Moody Tower and University of Houston Coastal Center from March 22, 2012- June 6, 2013 and July 26, 2013-June 6, 2013, respectively. The use of key tracer gases from various data sources as well as meteorological data from ground-based stationary monitoring facilities was used in the evaluation of high-mercury pollution plumes, the general direction of the source origin as well as seasonal and diurnal mixing ratios of the three atmospheric mercury species. At the costal site measurements showed consistently lower mixing ratios for all mercury species and had no significant mercury events recorded. The urban University of Houston Moody Tower had much higher and more dramatic fluctuations in mixing ratios for all three mercury species with two major mercury events recorded. Both events were associated with periods of low wind conditions and Houston Ship Channel origins. While the measurements collected at the urban location show consistencies with past studies conducted at the same location, the complexity of atmospheric mercury interactions prevent any indepth interpretations of the results.
Author: Nicola Pirrone
Publisher: Springer Science & Business Media
ISBN: 038793958X
Category : Science
Languages : en
Pages : 636
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Book Description
Mercury, primarily because of its existence and bioaccumulation as methylmercury in aquatic organisms, is a concern for the health of higher trophic level organisms, or to their consumers. This is the major factor driving current research in mercury globally and in environmental regulation, and is the driver for the current UNEP Global Partnership for Mercury Transport and Fate Research (UNEP F&T) initiative. The overall focus of the UNEP F&T report is to assess the relative importance of different processes/mechanisms affecting the transfer of mercury (Hg) from emission sources to aquatic and terrestrial receptors and provide possible source-receptor relationships. This transfer occurs through atmospheric transport, chemical transformations and subsequent deposition, and involves the intermittent recycling between reservoirs that occurs prior to ultimate removal of Hg from the atmosphere. Understanding the sources, the global Hg transport and fate, and the impact of human activity on the biosphere, requires improved knowledge of Hg movement and transformation in the atmosphere. An improved understanding of Hg emission sources, fate and transport is important if there is to be a focused and concerted effort to set priorities and goals for Hg emission management and reduction at the national, regional and global levels; and to develop and implement such policies and strategies. To achieve this, a series of coordinated scientific endeavors focused on the estimation of sources, measurement and validation of concentrations and processes, and modeling, coupled with interpretation of the results within a policy framework, is likely to be required.
Author: Xinbin Feng
Publisher: Springer
ISBN: 9811067198
Category : Science
Languages : en
Pages : 421
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Book Description
This book presents an intensive study on the biogeochemical cycle of mercury in a river-reservoir system in Wujiang River Basin, the upper branch of the Yangtze River. Six reservoirs located in the mainstream of the Wujiang River and their corresponding inflow/outflow rivers were selected for inclusion in this study, which was conducted by researchers from the Institute of Geochemistry, Chinese Academy of Sciences. The concentration and distribution of Hg in reservoirs (the water column, sediment, sediment pore water), inflow/outflow rivers of reservoirs, and wet deposition in Wujiang River Basin were systematically investigated, and measurements were taken of the water/air exchange flux of gaseous elemental mercury (GEM). On the basis of the data gathered, a detailed mass balance of total mercury (THg) and methylmercury (MeHg) in the six reservoirs was developed. In addition, the book identifies the primary factors controlling Hg methylation in the river-reservoir system in Wujiang River Basin. The accumulation and bio-magnification of Hg species within food chains in reservoirs and human health risk of MeHg exposure through fish consumption are also included in this book.
Author: Stephen Paul Scheidt
Publisher:
ISBN:
Category :
Languages : en
Pages : 238
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Book Description
Author: Brian Eugene Rood
Publisher:
ISBN:
Category :
Languages : en
Pages : 360
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Book Description
Author: Guey-Rong Sheu
Publisher:
ISBN:
Category : Atmospheric deposition
Languages : en
Pages : 340
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Book Description
Author: Charles William Martin
Publisher: Frontiers Media SA
ISBN: 2832524559
Category : Science
Languages : en
Pages : 177
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Book Description
Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 812
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Book Description
Author:
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 698
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Book Description
Indexes material from conference proceedings and hard-to-find documents, in addition to journal articles. Over 1,000 journals are indexed and literature published from 1981 to the present is covered. Topics in pollution and its management are extensively covered from the standpoints of atmosphere, emissions, mathematical models, effects on people and animals, and environmental action. Major areas of coverage include: air pollution, marine pollution, freshwater pollution, sewage and wastewater treatment, waste management, land pollution, toxicology and health, noise, and radiation.
Author: Harold Mooney
Publisher: Univ of California Press
ISBN: 0520962176
Category : Nature
Languages : en
Pages : 1009
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Book Description
This long-anticipated reference and sourcebook for California’s remarkable ecological abundance provides an integrated assessment of each major ecosystem type—its distribution, structure, function, and management. A comprehensive synthesis of our knowledge about this biologically diverse state, Ecosystems of California covers the state from oceans to mountaintops using multiple lenses: past and present, flora and fauna, aquatic and terrestrial, natural and managed. Each chapter evaluates natural processes for a specific ecosystem, describes drivers of change, and discusses how that ecosystem may be altered in the future. This book also explores the drivers of California’s ecological patterns and the history of the state’s various ecosystems, outlining how the challenges of climate change and invasive species and opportunities for regulation and stewardship could potentially affect the state’s ecosystems. The text explicitly incorporates both human impacts and conservation and restoration efforts and shows how ecosystems support human well-being. Edited by two esteemed ecosystem ecologists and with overviews by leading experts on each ecosystem, this definitive work will be indispensable for natural resource management and conservation professionals as well as for undergraduate or graduate students of California’s environment and curious naturalists.
