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Author
LaCasce, J.H. ; Escartin, J. ; Chassignet, E.P. ; Xu, X.
Title
Jet instability over smooth, corrugated and realistic bathymetry
Type
$loc['typeJournal Article']
Year
2018
Publication
Journal of Physical Oceanography
Abbreviated Journal
J. Phys. Oceanogr.
Volume
Issue
Pages
Keywords
Abstract
The stability of a horizontally- and vertically-sheared surface jet is examined, with a focus on the vertical structure of the resultant eddies. Over a flat bottom, the instability is mixed baroclinic/barotropic, producing strong eddies at depth which are characteristically shifted downstream relative to the surface eddies. Baroclinic instability is suppressed over a large slope for retrograde jets (with a flow anti-parallel to topographic wave propagation), and to a lesser extent for prograde jets (with flow parallel to topographic wave propagation), as seen previously. In such cases, barotropic (lateral) instability dominates if the jet is sufficiently narrow. This yields surface eddies whose size is independent of the slope but proportional to the jet width. Deep eddies still form, forced by interfacial motion associated with the surface eddies, but they are weaker than under baroclinic instability and are vertically aligned with the surface eddies. A sinusoidal ridge acts similarly, suppressing baroclinic instability and favoring lateral instability in the upper layer. A ridge with a 1 km wavelength and an amplitude of roughly 10 m is sufficient to suppress baroclinic instability. Surveys of bottom roughness from bathymetry acquired with shipboard multibeam echosounding reveal that such heights are common, beneath the Kuroshio, the Antarctic Circumpolar Current and, to a lesser extent, the Gulf Stream. Consistent with this, vorticity and velocity cross sections from a 1/50° HYCOM simulation suggest that Gulf Stream eddies are vertically aligned, as in the linear stability calculations with strong topography. Thus lateral instability may be more common than previously thought, due to topography hindering vertical energy transfer.
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Series Editor
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ISSN
0022-3670
ISBN
Medium
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Conference
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Approved
$loc['no']
Call Number
COAPS @ user @
Serial
998
Permanent link to this record
Author
Ardhuin, F. ; Chapron, B. ; Maes, C. ; Romeiser, R. ; Gommenginger, C. ; Cravatte, S. ; Morrow, R. ; Donlon, C. ; Bourassa, M.
Title
Satellite Doppler observations for the motions of the oceans
Type
$loc['typeJournal Article']
Year
2019
Publication
Bulletin of the American Meteorological Society
Abbreviated Journal
Bull. Amer. Meteor. Soc.
Volume
Issue
Pages
Keywords
Abstract
Satellite remote sensing has revolutionized oceanography, starting from sea surface temperature, ocean color, sea level, winds, waves, and the recent addition of sea surface salinity, providing a global view of upper ocean processes. The possible addition of a direct measurement of surface velocities related to currents, winds and waves opens great opportunities for research and applications.
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Series Editor
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0003-0007
ISBN
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Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1025
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Author
Liu, Q. ; Tan, Z-M. ; Sun, J. ; Hou, Y. ; Fu, C. ; Wu, Z.
Title
Changing rapid weather variability increases influenza epidemic risk in a warming climate
Type
$loc['typeJournal Article']
Year
2020
Publication
Environmental Research Letters
Abbreviated Journal
Environmental Research Letters
Volume
15
Issue
4
Pages
Keywords
Abstract
The continuing change of the Earth's climate is believed to affect the influenza viral activity and transmission in the coming decades. However, a consensus of the severity of the risk of influenza epidemic in a warming climate has not been reached. It was previously reported that the warmer winter can reduce influenza epidemic-caused mortality, but this relation cannot explain the deadly influenza epidemic in many countries over northern mid-latitudes in the winter of 2017-2018, one of the warmest winters in recent decades. Here we reveal that the widely spread 2017-2018 influenza epidemic can be attributed to the abnormally strong rapid weather variability. We demonstrate, from historical data, that the large rapid weather variability in autumn can precondition the deadly influenza epidemic in the subsequent months in highly populated northern mid-latitudes; and the influenza epidemic season of 2017-2018 was a typical case. We further show that climate model projections reach a consensus that the rapid weather variability in autumn will continue to strengthen in some regions of northern mid-latitudes in a warming climate, implying that the risk of influenza epidemic may increase 20% to 50% in some highly populated regions in later 21st century.
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Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1070
Permanent link to this record
Author
Weissman, DE ; Morey, S ; Bourassa, M
Title
Studies of the effects of rain on the performance of the SMAP radiometer surface salinity estimates and applications to remote sensing of river plumes
Type
$loc['typeConference Article']
Year
2017
Publication
IEEE International Symposium on Geoscience and Remote Sensing IGARSS
Abbreviated Journal
Volume
Issue
Pages
1491-1494
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$loc['no']
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COAPS @ mfield @
Serial
834
Permanent link to this record
Author
Morey, S. L. ; O'Brien, J. J. ; Schroeder, W. W. ; Zavala-Hidalgo, J.
Title
), Seasonal variability of the export of river discharged freshwater in the Northern gulf of Mexico
Type
$loc['typeJournal Article']
Year
2002
Publication
MTS/IEEE Oceans 2002 Proceedings
Abbreviated Journal
Volume
Issue
Pages
1480-1484
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$loc['no']
Call Number
COAPS @ mfield @
Serial
861
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Author
Zavala-Hidalgo, J. ; Morey, S. L. ; O'Brien, J. J.
Title
On the formation and interaction of cyclonic eddies with the Loop Current using NCOM and a suite of observations
Type
$loc['typeJournal Article']
Year
2002
Publication
MTS/IEEE Oceans 2002 Proceedings
Abbreviated Journal
Volume
Issue
Pages
1463-1466
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Series Editor
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ISBN
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$loc['no']
Call Number
COAPS @ mfield @
Serial
862
Permanent link to this record
Author
Chassignet, EP ; Jones, JW ; Misra, V ; Obeysekera, J
Title
Florida's Climate: Changes, Variations, & Impacts
Type
$loc['typeBook Whole']
Year
2017
Publication
Abbreviated Journal
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$loc['no']
Call Number
COAPS @ mfield @
Serial
847
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Author
Robinson, W. ; Speich, S. ; Chassignet, E.
Title
Exploring the Interplay Between Ocean Eddies and the Atmosphere
Type
$loc['typeJournal Article']
Year
2018
Publication
Eos
Abbreviated Journal
Eos
Volume
99
Issue
Pages
Keywords
Mesoscale ; Climate ; Variability ; Atmospheric
Abstract
Climate models, for the first time, have sufficient resolution to capture mesoscale ocean eddies and their interactions with the atmosphere.New model results suggest that the atmosphere, at weather scales or larger, responds to cumulative effects of the much smaller ocean eddies. Intriguing new model results presented at the workshop suggested that the atmosphere, at weather scales or larger.
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Series Editor
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2324-9250
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$loc['no']
Call Number
COAPS @ rl18 @
Serial
988
Permanent link to this record
Author
Kirtman, B. P. ; Misra, V. ; Anandhi, A. ; Palko, D. ; Infanti, J.
Title
Future Climate Change Scenarios for Florida
Type
$loc['typeBook Chapter']
Year
2017
Publication
Florida's climate: Changes, variations, & impacts
Abbreviated Journal
Volume
Issue
Pages
533-555
Keywords
Anthropogenically forced climate change ; Decadal climate prediction ; Climate projection ; Climate scenario ; Mitigation ; Adaptation
Abstract
Address
Corporate Author
Thesis
Publisher
Florida Climate Institute
Place of Publication
Gainesville, FL
Editor
Chassignet, E. P.; Jones, J. W.; Misra, V.; Obeysekera, J.
Language
Summary Language
Original Title
Series Editor
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ISBN
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$loc['no']
Call Number
COAPS @ mfield @
Serial
851
Permanent link to this record
Author
Kirtman, B. P. ; Misra, V. ; Burgman, R. J. ; Infanti, J. ; Obeysekera, J.
Title
Florida Climate Variability and Prediction
Type
$loc['typeBook Chapter']
Year
2017
Publication
Florida's climate: Changes, variations, & impacts
Abbreviated Journal
Volume
Issue
Pages
511-532
Keywords
Multi-model ensembles ; Regional climate prediction ; Dynamical downscaling ; Statistical downscaling
Abstract
Address
Corporate Author
Thesis
Publisher
Florida Climate Institute
Place of Publication
Gainesville, FL
Editor
Chassignet, E. P.; Jones, J. W.; Misra, V.; Obeysekera, J.
Language
Summary Language
Original Title
Series Editor
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ISBN
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$loc['no']
Call Number
COAPS @ mfield @
Serial
850
Permanent link to this record