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Author
Proshutinsky, A. ; Dukhovskoy, D. ; Timmermans, M.-L. ; Krishfield, R. ; Bamber, J.L.
Title
Arctic circulation regimes
Type
$loc['typeJournal Article']
Year
2015
Publication
Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
Abbreviated Journal
Philos Trans A Math Phys Eng Sci
Volume
373
Issue
2052
Pages
Keywords
arctic climate variability ; circulation regimes ; freshwater and heat content
Abstract
Between 1948 and 1996, mean annual environmental parameters in the Arctic experienced a well-pronounced decadal variability with two basic circulation patterns: cyclonic and anticyclonic alternating at 5 to 7 year intervals. During cyclonic regimes, low sea-level atmospheric pressure (SLP) dominated over the Arctic Ocean driving sea ice and the upper ocean counterclockwise; the Arctic atmosphere was relatively warm and humid, and freshwater flux from the Arctic Ocean towards the subarctic seas was intensified. By contrast, during anticylonic circulation regimes, high SLP dominated driving sea ice and the upper ocean clockwise. Meanwhile, the atmosphere was cold and dry and the freshwater flux from the Arctic to the subarctic seas was reduced. Since 1997, however, the Arctic system has been under the influence of an anticyclonic circulation regime (17 years) with a set of environmental parameters that are atypical for this regime. We discuss a hypothesis explaining the causes and mechanisms regulating the intensity and duration of Arctic circulation regimes, and speculate how changes in freshwater fluxes from the Arctic Ocean and Greenland impact environmental conditions and interrupt their decadal variability.
Address
School of Geographical Sciences, University of Bristol, Bristol, UK
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
1364-503X
ISBN
Medium
Area
Expedition
Conference
Funding
PMID:26347536; PMCID:PMC4607701
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
109
Permanent link to this record
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
Powell, M.D. ; Cocke, S.
Title
Hurricane wind fields needed to assess risk to offshore wind farms
Type
$loc['typeJournal Article']
Year
2012
Publication
Proceedings of the National Academy of Sciences of the United States of America
Abbreviated Journal
Proc Natl Acad Sci U S A
Volume
109
Issue
33
Pages
E2192; author reply E2193-4
Keywords
Abstract
Address
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
0027-8424
ISBN
Medium
Area
Expedition
Conference
Funding
PMID:22829670; PMCID:PMC3421164
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
241
Permanent link to this record
Author
Adams, D.K. ; McGillicuddy, D.J.J. ; Zamudio, L. ; Thurnherr, A.M. ; Liang, X. ; Rouxel, O. ; German, C.R. ; Mullineaux, L.S.
Title
Surface-generated mesoscale eddies transport deep-sea products from hydrothermal vents
Type
$loc['typeJournal Article']
Year
2011
Publication
Science (New York, N.Y.)
Abbreviated Journal
Science
Volume
332
Issue
6029
Pages
580-583
Keywords
Abstract
Atmospheric forcing, which is known to have a strong influence on surface ocean dynamics and production, is typically not considered in studies of the deep sea. Our observations and models demonstrate an unexpected influence of surface-generated mesoscale eddies in the transport of hydrothermal vent efflux and of vent larvae away from the northern East Pacific Rise. Transport by these deep-reaching eddies provides a mechanism for spreading the hydrothermal chemical and heat flux into the deep-ocean interior and for dispersing propagules hundreds of kilometers between isolated and ephemeral communities. Because the eddies interacting with the East Pacific Rise are formed seasonally and are sensitive to phenomena such as El Nino, they have the potential to introduce seasonal to interannual atmospheric variations into the deep sea.
Address
Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA. dadams@whoi.edu
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
0036-8075
ISBN
Medium
Area
Expedition
Conference
Funding
PMID:21527710
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
307
Permanent link to this record
Author
Zeng, H. ; Chambers, J.Q. ; Negron-Juarez, R.I. ; Hurtt, G.C. ; Baker, D.B. ; Powell, M.D.
Title
Impacts of tropical cyclones on U.S. forest tree mortality and carbon flux from 1851 to 2000
Type
$loc['typeJournal Article']
Year
2009
Publication
Proceedings of the National Academy of Sciences of the United States of America
Abbreviated Journal
Proc Natl Acad Sci U S A
Volume
106
Issue
19
Pages
7888-7892
Keywords
Biodiversity ; Biomass ; Carbon ; *Cyclonic Storms ; Ecosystem ; Greenhouse Effect ; Models, Statistical ; Southeastern United States ; *Trees ; United States
Abstract
Tropical cyclones cause extensive tree mortality and damage to forested ecosystems. A number of patterns in tropical cyclone frequency and intensity have been identified. There exist, however, few studies on the dynamic impacts of historical tropical cyclones at a continental scale. Here, we synthesized field measurements, satellite image analyses, and empirical models to evaluate forest and carbon cycle impacts for historical tropical cyclones from 1851 to 2000 over the continental U.S. Results demonstrated an average of 97 million trees affected each year over the entire United States, with a 53-Tg annual biomass loss, and an average carbon release of 25 Tg y(-1). Over the period 1980-1990, released CO(2) potentially offset the carbon sink in forest trees by 9-18% over the entire United States. U.S. forests also experienced twice the impact before 1900 than after 1900 because of more active tropical cyclones and a larger extent of forested areas. Forest impacts were primarily located in Gulf Coast areas, particularly southern Texas and Louisiana and south Florida, while significant impacts also occurred in eastern North Carolina. Results serve as an important baseline for evaluating how potential future changes in hurricane frequency and intensity will impact forest tree mortality and carbon balance.
Address
Department of Ecology and Evolutionary Biology, Tulane University, 400 Boggs Center, New Orleans, LA 70118, USA. hzeng@tulane.edu
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
0027-8424
ISBN
Medium
Area
Expedition
Conference
Funding
PMID:19416842; PMCID:PMC2683102
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
658
Permanent link to this record
Author
Jones, W.B. ; O'Brien, J.J.
Title
Pseudo-spectral methods and linear instabilities in reaction-diffusion fronts
Type
$loc['typeJournal Article']
Year
1996
Publication
Chaos (Woodbury, N.Y.)
Abbreviated Journal
Chaos
Volume
6
Issue
2
Pages
219-228
Keywords
Abstract
We explore the application of a pseudo-spectral Fourier method to a set of reaction-diffusion equations and compare it with a second-order finite difference method. The prototype cubic autocatalytic reaction-diffusion model as discussed by Gray and Scott [Chem. Eng. Sci. 42, 307 (1987)] with a nonequilibrium constraint is adopted. In a spatial resolution study we find that the phase speeds of one-dimensional finite amplitude waves converge more rapidly for the spectral method than for the finite difference method. Furthermore, in two dimensions the symmetry preserving properties of the spectral method are shown to be superior to those of the finite difference method. In studies of plane/axisymmetric nonlinear waves a symmetry breaking linear instability is shown to occur and is one possible route for the formation of patterns from infinitesimal perturbations to finite amplitude waves in this set of reaction-diffusion equations. (c) 1996 American Institute of Physics.
Address
Advanced Systems Division, Silicon Graphics Inc., Mountain View, California 94043-1389COAPS, Florida State University, Tallahassee, Florida 32306-3041
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
1054-1500
ISBN
Medium
Area
Expedition
Conference
Funding
PMID:12780250
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
714
Permanent link to this record
Author
Wu, Z. ; Chassignet, E.P. ; Ji, F. ; Huang, J.
Title
Reply to 'Spatiotemporal patterns of warming'
Type
$loc['typeJournal Article']
Year
2014
Publication
Nature Climate Change
Abbreviated Journal
Nature Climate change
Volume
4
Issue
10
Pages
846-848
Keywords
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
1758-678X
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
151
Permanent link to this record
Author
Ji, F. ; Wu, Z. ; Huang, J. ; Chassignet, E.P.
Title
Evolution of land surface air temperature trend
Type
$loc['typeJournal Article']
Year
2014
Publication
Nature Climate Change
Abbreviated Journal
Nature Climate change
Volume
4
Issue
6
Pages
462-466
Keywords
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
1758-678X
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
131
Permanent link to this record
Author
Misra, V. ; Mishra, A. ; Bhardwaj, A. ; Viswanthan, K. ; Schmutz, D.
Title
The potential role of land cover on secular changes of the hydroclimate of Peninsular Florida
Type
$loc['typeJournal Article']
Year
2018
Publication
Climate and Atmospheric Science
Abbreviated Journal
Clim Atmos Sci
Volume
1
Issue
1
Pages
Keywords
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
2397-3722
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
833
Permanent link to this record