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Author
Harris, R. ; Pollman, C. ; Hutchinson, D. ; Landing, W. ; Axelrad, D. ; Morey, S.L. ; Dukhovskoy, D. ; Vijayaraghavan, K.
Title
A screening model analysis of mercury sources, fate and bioaccumulation in the Gulf of Mexico
Type
$loc['typeJournal Article']
Year
2012
Publication
Environmental Research
Abbreviated Journal
Environ Res
Volume
119
Issue
Pages
53-63
Keywords
Animals ; Calibration ; Environmental Exposure ; Fishes/metabolism ; Humans ; Mercury/*chemistry/metabolism ; *Models, Theoretical ; Seawater/*chemistry ; Water Pollutants, Chemical/*chemistry/metabolism
Abstract
A mass balance model of mercury (Hg) cycling and bioaccumulation was applied to the Gulf of Mexico (Gulf), coupled with outputs from hydrodynamic and atmospheric Hg deposition models. The dominant overall source of Hg to the Gulf is the Atlantic Ocean. Gulf waters do not mix fully however, resulting in predicted spatial differences in the relative importance of external Hg sources to Hg levels in water, sediments and biota. Direct atmospheric Hg deposition, riverine inputs, and Atlantic inputs were each predicted to be the most important source of Hg to at least one of the modeled regions in the Gulf. While incomplete, mixing of Gulf waters is predicted to be sufficient that fish Hg levels in any given location are affected by Hg entering other regions of the Gulf. This suggests that a Gulf-wide approach is warranted to reduce Hg loading and elevated Hg concentrations currently observed in some fish species. Basic data to characterize Hg concentrations and cycling in the Gulf are lacking but needed to adequately understand the relationship between Hg sources and fish Hg concentrations.
Address
Reed Harris Environmental Ltd., 180 Forestwood Drive, Oakville, Ontario L6J4E6, Canada. reed@reed-harris.com
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
English
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0013-9351
ISBN
Medium
Area
Expedition
Conference
Funding
PMID:23102631
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
234
Permanent link to this record
Author
Harris, R. ; Pollman, C. ; Landing, W. ; Evans, D. ; Axelrad, D. ; Hutchinson, D. ; Morey, S.L. ; Rumbold, D. ; Dukhovskoy, D. ; Adams, D.H. ; Vijayaraghavan, K. ; Holmes, C. ; Atkinson, R.D. ; Myers, T. ; Sunderland, E.
Title
Mercury in the Gulf of Mexico: sources to receptors
Type
$loc['typeJournal Article']
Year
2012
Publication
Environmental Research
Abbreviated Journal
Environ Res
Volume
119
Issue
Pages
42-52
Keywords
Air Pollutants/chemistry ; Animals ; Environmental Exposure ; Food Chain ; Geologic Sediments/chemistry ; Humans ; Mercury/*chemistry/metabolism ; Seawater/*chemistry ; Water Pollutants, Chemical/*chemistry/metabolism
Abstract
Gulf of Mexico (Gulf) fisheries account for 41% of the U.S. marine recreational fish catch and 16% of the nation's marine commercial fish landings. Mercury (Hg) concentrations are elevated in some fish species in the Gulf, including king mackerel, sharks, and tilefish. All five Gulf states have fish consumption advisories based on Hg. Per-capita fish consumption in the Gulf region is elevated compared to the U.S. national average, and recreational fishers in the region have a potential for greater MeHg exposure due to higher levels of fish consumption. Atmospheric wet Hg deposition is estimated to be higher in the Gulf region compared to most other areas in the U.S., but the largest source of Hg to the Gulf as a whole is the Atlantic Ocean (>90%) via large flows associated with the Loop Current. Redistribution of atmospheric, Atlantic and terrestrial Hg inputs to the Gulf occurs via large scale water circulation patterns, and further work is needed to refine estimates of the relative importance of these Hg sources in terms of contributing to fish Hg levels in different regions of the Gulf. Measurements are needed to better quantify external loads, in-situ concentrations, and fluxes of total Hg and methylmercury in the water column, sediments, and food web.
Address
Reed Harris Environmental Ltd, 180 Forestwood Drive, Oakville, Ontario L6J4E6, Canada. reed@reed-harris.com
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
English
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0013-9351
ISBN
Medium
Area
Expedition
Conference
Funding
PMID:23098613
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
233
Permanent link to this record
Author
Laurencin, C. ; Misra, V.
Title
Characterizing the Variations of the motion of the North Atlantic tropical cyclones
Type
$loc['typeJournal Article']
Year
2018
Publication
Meteorology and Atmospheric Physics
Abbreviated Journal
Meteorol Atmos Phys
Volume
130
Issue
303
Pages
1-12
Keywords
climatology ; interannual scales ; environment
Abstract
In this study, we examine the seasonal and interannual variability of the North Atlantic (NATL) tropical cyclone (TC) motion from the historical Hurricane Database (HURDAT2) over the period 1988-2014. We characterize these motions based on their position, lifecycle, and seasonal cycle. The main findings of this study include: (1) of the 11,469 NATL TC fixes examined between 1988 and 2014, 81% of them had a translation speed of < 20 mph; (2) TCs in the deep tropics of the NATL are invariably slow-moving in comparison with TCs in higher latitudes. Although fast-moving TCs (> 40 mph) are exclusively found north of 30 N, the slow-moving TCs have a wide range of latitude. This is largely a consequence of the background steering flow being weaker (stronger) in the tropical (higher) latitudes with a minimum around the subtropical latitudes of NATL; (3) there is an overall decrease in the frequency of all categories of translation speed of TCs in warm relative to cold El Niño Southern Oscillation (ENSO) years. However, in terms of the percentage change, TCs with a translation speed in the range of 10-20 mph display the most change (42%) in warm relative to cold ENSO years; and (4) there is an overall decrease in frequency across all categories of TC translation speed in small relative to large Atlantic Warm Pool years, but in terms of percentage change in the frequency of TCs, there is a significant and comparable change in the frequency over a wider range of translation speeds than the ENSO composites. This last finding suggests that Atlantic Warm Pool variations have a more profound impact on the translation speed of Atlantic TCs than ENSO.
Address
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Original Title
Series Editor
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ISSN
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Medium
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Approved
$loc['no']
Call Number
COAPS @ rl18 @
Serial
991
Permanent link to this record
Author
Ramírez-Rodrigues, M.A. ; Alderman, P.D. ; Stefanova, L. ; Cossani, C.M. ; Flores, D. ; Asseng, S.
Title
The value of seasonal forecasts for irrigated, supplementary irrigated, and rainfed wheat cropping systems in northwest Mexico
Type
$loc['typeJournal Article']
Year
2016
Publication
Agricultural Systems
Abbreviated Journal
Agricultural Systems
Volume
147
Issue
Pages
76-86
Keywords
Arid environment ; litigation ; Supplementary irrigation ; Wheat ; Mexico ; Seasonal forecast
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0308521X
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
49
Permanent link to this record