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Toward an Improved Understanding of the Global Biogeochemical Cycle of Mercury

2014
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Release : 2014
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Book Synopsis Toward an Improved Understanding of the Global Biogeochemical Cycle of Mercury by : Helen Marie Amos

Download or read book Toward an Improved Understanding of the Global Biogeochemical Cycle of Mercury written by Helen Marie Amos. This book was released on 2014. Available in PDF, EPUB and Kindle. Book excerpt: Mercury (Hg) is a potent neurotoxin, has both natural and anthropogenic sources to the environment, and is globally dispersed. Humans have been using Hg since antiquity and continue its use in large quantities, mobilizing Hg from stable long-lived geologic reservoirs to actively cycling surface terrestrial and aquatic ecosystems. Human activities, such as mining and coal combustion, have perturbed the natural biogeochemical cycle of Hg. However, the distribution of natural versus anthropogenic Hg in the environment today and the extent of anthropogenic perturbation (i.e., enrichment) are uncertain. Previous model estimates of anthropogenic enrichment have been limited by a lack of information about historical emissions, examined only near-term effects, or have not accounted for the full coupling between biogeochemical reservoirs. Presented here is a framework that integrates recently available historical emission inventories and overcomes these barriers, providing an improved quantitative understanding of global Hg cycling.

Dynamics of Mercury Pollution on Regional and Global Scales

2005-07-22 Nature
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Release : 2005-07-22
Genre : Nature
Kind : eBook
Book Rating : 938/5 ( reviews)

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Book Synopsis Dynamics of Mercury Pollution on Regional and Global Scales by : Nicola Pirrone

Download or read book Dynamics of Mercury Pollution on Regional and Global Scales written by Nicola Pirrone. This book was released on 2005-07-22. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the different dynamic patterns involved in the redistribution of mercury in the global environment, and its impact on human health and ecosystems. Increasing mercury usage and the lack of emission control policy, especially in fast developing countries, represent a complex environmental and political issue that can only benefit from more accurate measurement.

Global Biogeochemical Cycling of Mercury

2009
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Release : 2009
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Book Synopsis Global Biogeochemical Cycling of Mercury by : Noelle Eckley Selin

Download or read book Global Biogeochemical Cycling of Mercury written by Noelle Eckley Selin. This book was released on 2009. Available in PDF, EPUB and Kindle. Book excerpt: Mercury pollution poses global human health and environmental risks. Although mercury is naturally present in the environment, human activities, such as coal burning, have increased the amount of mercury cycling among the land, atmosphere, and ocean by a factor of three to five. Emitted to the atmosphere in its elemental form, mercury travels worldwide before oxidizing to a form that deposits to ecosystems. In aquatic systems, mercury can convert into methylmercury, a potent neurotoxin. People and wildlife are exposed to methylmercury as it bioaccumulates up the food chain. Mercury continues to circulate in the atmosphere, oceans, and terrestrial system for centuries to millennia before it returns to deep-ocean sediments. Areas of uncertainty in the global biogeochemical cycle of mercury include oxidation processes in the atmosphere, land-atmosphere and ocean-atmosphere cycling, and methylation processes in the ocean. National and international policies have addressed direct mercury emissions, but further efforts to reduce risks face numerous political and technical challenges.

Mercury in the Environment

2012-05-31 Nature
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Release : 2012-05-31
Genre : Nature
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Book Rating : 395/5 ( reviews)

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Book Synopsis Mercury in the Environment by : Michael S. Bank

Download or read book Mercury in the Environment written by Michael S. Bank. This book was released on 2012-05-31. Available in PDF, EPUB and Kindle. Book excerpt: Mercury pollution and contamination are widespread, well documented, and continue to pose a public health concern in both developed and developing countries. In response to a growing need for understanding the cycling of this ubiquitous pollutant, the science of mercury has grown rapidly to include the fields of biogeochemistry, economics, sociology, public health, decision sciences, physics, global change, and mathematics. Only recently have scientists begun to establish a holistic approach to studying mercury pollution that integrates chemistry, biology, and human health sciences. Mercury in the Environment follows the process of mercury cycling through the atmosphere, through terrestrial and aquatic food webs, and through human populations to develop a comprehensive perspective on this important environmental problem. This timely reference also provides recommendations on mercury remediation, risk communication, education, and monitoring.

Global Biogeochemical Cycling of Mercury

2014
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Release : 2014
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Kind : eBook
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Book Synopsis Global Biogeochemical Cycling of Mercury by : Noelle E. Selin

Download or read book Global Biogeochemical Cycling of Mercury written by Noelle E. Selin. This book was released on 2014. Available in PDF, EPUB and Kindle. Book excerpt: Mercury pollution poses global human health and environmental risks. Although mercury is naturally present in the environment, human activities, such as coal burning, have increased the amount of mercury cycling among the land, atmosphere, and ocean by a factor of three to five. Emitted to the atmosphere in its elemental form, mercury travels worldwide before oxidizing to a form that deposits to ecosystems. In aquatic systems, mercury can convert into methylmercury, a potent neurotoxin. People and wildlife are exposed to methylmercury as it bioaccumulates up the food chain. Mercury continues to circulate in the atmosphere, oceans, and terrestrial system for centuries to millennia before it returns to deep-ocean sediments. Areas of uncertainty in the global biogeochemical cycle of mercury include oxidation processes in the atmosphere, land-atmosphere and ocean-atmosphere cycling, and methylation processes in the ocean. National and international policies have addressed direct mercury emissions, but further efforts to reduce risks face numerous political and technical challenges.

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