alexa Overview Of Quantifying The Air-surface Exchange Of Elemental Mercury Vapours Using Enclosure And Micrometeorological Methods | 18548
ISSN: 2157-7617

Journal of Earth Science & Climatic Change
Open Access

Like us on:
OMICS International organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations

700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)

3rd International Conference on Earth Science & Climate Change
July 28-30, 2014 DoubleTree by Hilton Hotel San Francisco Airport, USA

Jerry Che-Jen Lin
Workshops: J Earth Sci Clim Change
DOI: 10.4172/2157-7617.S1.014
Abstract
Reliable quantification of air-biosphere exchange flux of elemental mercury vapor (Hg0) is crucial for understanding the global biogeochemical cycling of mercury. Although several techniques with widely diverse principles have been applied, a standardized method for quantifying Hg0 flux does not exist. In this overview, the methods for measuring Hg0 flux, principally the enclosure and micrometeorological approaches, are discussed. Field data obtained from an integrated set of collocated instrumentations deployed to quantify Hg0 flux over bare soil and lightly vegetated canopy are presented to illustrate the data comparability and measurement uncertainties associated with different techniques including relaxed eddy accumulation (REA), modified Bowen-ratio (MBR), aerodynamic gradient (AGM) and two dynamic flux chamber (DFC) methods. Each Hg0 flux measurement technique has its own analytical fingerprint due to the complexity of surface exchange processes as well as the application principles and assumptions of the method. Statistical analysis indicates that the median fluxes measured by micrometeorological techniques (REA, MBR and AGM) are not significantly different. The Hg0 flux observed by a modified DFC method that incorporates surface shear correction is comparable to MBR-measured flux over bare soil, suggesting that data scaling using the friction velocity inside a DFC bridges the gap between the Hg0 fluxes measured by enclosure and micrometeorological methods. The uncertainty of Hg0 flux measurement varies greatly with the applied methods and environmental conditions. Recommendations are made in terms of selecting a suitable technique for a given set of environmental constrains to reduce Hg0 flux quantification uncertainty.
Biography
Jerry Che-Jen Lin is a Full Professor of Environmental Engineering at Lamar University. He received his MS degree at Duke University in 1995 and PhD at the University of Cincinnati in 1998. He was a Postdoctoral Associate at Oak Ridge National Laboratory during 1998-1999 before joining Lamar. He has authored and co-authored more than 70 peer-reviewed journal articles with more than 1600 citations, mainly in the areas of chemistry, fate and transport of atmospheric mercury and membrane technology. He also serves as a member in the Science Advisory Board of USEPA.
image PDF   |   image HTML
 
Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri & Aquaculture Journals

Dr. Krish

[email protected]

1-702-714-7001Extn: 9040

Biochemistry Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Business & Management Journals

Ronald

[email protected]

1-702-714-7001Extn: 9042

Chemistry Journals

Gabriel Shaw

[email protected]

1-702-714-7001Extn: 9040

Clinical Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Engineering Journals

James Franklin

[email protected]

1-702-714-7001Extn: 9042

Food & Nutrition Journals

Katie Wilson

[email protected]

1-702-714-7001Extn: 9042

General Science

Andrea Jason

[email protected]

1-702-714-7001Extn: 9043

Genetics & Molecular Biology Journals

Anna Melissa

[email protected]

1-702-714-7001Extn: 9006

Immunology & Microbiology Journals

David Gorantl

[email protected]

1-702-714-7001Extn: 9014

Materials Science Journals

Rachle Green

[email protected]

1-702-714-7001Extn: 9039

Nursing & Health Care Journals

Stephanie Skinner

[email protected]

1-702-714-7001Extn: 9039

Medical Journals

Nimmi Anna

[email protected]

1-702-714-7001Extn: 9038

Neuroscience & Psychology Journals

Nathan T

[email protected]

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

Ann Jose

[email protected]

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

[email protected]

1-702-714-7001Extn: 9042

 
© 2008- 2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version