| Global source-receptor relationships for mercury deposition under present-day and 2050 emissions scenarios. | |
| | |
MedLine Citation:
|
PMID: 22050654 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Global policies regulating anthropogenic mercury require an understanding of the relationship between emitted and deposited mercury on intercontinental scales. Here, we examine source-receptor relationships for present-day conditions and four 2050 IPCC scenarios encompassing a range of economic development and environmental regulation projections. We use the GEOS-Chem global model to track mercury from its point of emission through rapid cycling in surface ocean and land reservoirs to its accumulation in longer lived ocean and soil pools. Deposited mercury has a local component (emitted Hg(II), lifetime of 3.7 days against deposition) and a global component (emitted Hg(0), lifetime of 6 months against deposition). Fast recycling of deposited mercury through photoreduction of Hg(II) and re-emission of Hg(0) from surface reservoirs (ice, land, surface ocean) increases the effective lifetime of anthropogenic mercury to 9 months against loss to legacy reservoirs (soil pools and the subsurface ocean). This lifetime is still sufficiently short that source-receptor relationships have a strong hemispheric signature. Asian emissions are the largest source of anthropogenic deposition to all ocean basins, though there is also regional source influence from upwind continents. Current anthropogenic emissions account for only about one-third of mercury deposition to the global ocean with the remainder from natural and legacy sources. However, controls on anthropogenic emissions would have the added benefit of reducing the legacy mercury re-emitted to the atmosphere. Better understanding is needed of the time scales for transfer of mercury from active pools to stable geochemical reservoirs. |
| | |
Authors:
|
Elizabeth S Corbitt; Daniel J Jacob; Christopher D Holmes; David G Streets; Elsie M Sunderland |
Related Documents
:
|
22121914 - The ip-amplitude of the fluorescence rise ojip is sensitive to changes in the photosyst... 6703414 - Non-allergenic native and cultivated plants in oklahoma: landscaping without hay fever. 15347364 - Plant non-specific lipid transfer proteins as food and pollen allergens. 17402034 - Prenylated phenols that cause contact dermatitis from trichomes of phacelia ixodes. 11050154 - Impact of a permo-carboniferous high o2 event on the terrestrial carbon cycle. 20195884 - Carbon and nitrogen status of litterfall, litter decomposition and soil in even-aged la... |
Publication Detail:
|
Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. Date: 2011-11-18 |
Journal Detail:
|
Title: Environmental science & technology Volume: 45 ISSN: 1520-5851 ISO Abbreviation: Environ. Sci. Technol. Publication Date: 2011 Dec |
Date Detail:
|
Created Date: 2011-12-23 Completed Date: 2012-04-09 Revised Date: 2013-02-20 |
Medline Journal Info:
|
Nlm Unique ID: 0213155 Medline TA: Environ Sci Technol Country: United States |
Other Details:
|
Languages: eng Pagination: 10477-84 Citation Subset: IM |
Affiliation:
|
Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, United States. corbitt@seas.harvard.edu |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Environmental Monitoring
/
methods* Environmental Pollutants / analysis* Environmental Pollution / statistics & numerical data* Mercury / analysis* Models, Chemical Statistics as Topic |
| Grant Support | |
ID/Acronym/Agency:
|
P30 ES000002/ES/NIEHS NIH HHS; P30 ES000002-45/ES/NIEHS NIH HHS |
| Chemical | |
Reg. No./Substance:
|
0/Environmental Pollutants; 7439-97-6/Mercury |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: General Health, Health-Related Quality of Life and Sexual Health After Pediatric Liver Transplantati...
Next Document: Belief in a Werther Effect: Third-Person Effects in the Perceptions of Suicide Risk for Others and t...