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Author
Ali, A. ; Christensen, K.H. ; Breivik, Ø. ; Malila, M. ; Raj, R.P. ; Bertino, L. ; Chassignet, E.P. ; Bakhoday-Paskyabi, M.
Title
A comparison of Langmuir turbulence parameterizations and key wave effects in a numerical model of the North Atlantic and Arctic Oceans
Type
$loc['typeJournal Article']
Year
2019
Publication
Ocean Modelling
Abbreviated Journal
Ocean Modelling
Volume
137
Issue
Pages
76-97
Keywords
Langmuir mixing parameterization Mixed layer depth Sea surface temperature Ocean heat content Stokes penetration depth
Abstract
Five different parameterizations of Langmuir turbulence (LT) effect are investigated in a realistic model of the North Atlantic and Arctic using realistic wave forcing from a global wave hindcast. The parameterizations mainly apply an enhancement to the turbulence velocity scale, and/or to the entrainment buoyancy flux in the surface boundary layer. An additional run is also performed with other wave effects to assess the relative importance of Langmuir turbulence, namely the Coriolis-Stokes forcing, Stokes tracer advection and wave-modified momentum fluxes. The default model (without wave effects) underestimates the mixed layer depth in summer and overestimates it at high latitudes in the winter. The results show that adding LT mixing reduces shallow mixed layer depth (MLD) biases, particularly in the subtropics all year-around, and in the Nordic Seas in summer. There is overall a stronger relative impact on the MLD during winter than during summer. In particular, the parameterization with the most vigorous LT effect causes winter MLD increases by more than 50% relative to a control run without Langmuir mixing. On the contrary, the parameterization which assumes LT effects on the entrainment buoyancy flux and accounts for the Stokes penetration depth is able to enhance the mixing in summer more than in winter. This parametrization is also distinct from the others because it restrains the LT mixing in regions of deep MLD biases, so it is the preferred choice for our purpose. The different parameterizations do not change the amplitude or phase of the seasonal cycle of heat content but do influence its long-term trend, which means that the LT can influence the drift of ocean models. The combined impact on water mass properties from the Coriolis-Stokes force, the Stokes drift tracer advection, and the wave-dependent momentum fluxes is negligible compared to the effect from the parameterized Langmuir turbulence.
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
1463-5003
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1001
Permanent link to this record
Author
Ali, M. ; Singh, N. ; Kumar, M. ; Zheng, Y. ; Bourassa, M. ; Kishtawal, C. ; Rao, C.
Title
Dominant Modes of Upper Ocean Heat Content in the North Indian Ocean
Type
$loc['typeJournal Article']
Year
2018
Publication
Climate
Abbreviated Journal
Climate
Volume
6
Issue
3
Pages
71
Keywords
ocean heat content ; tropical cyclone heat potential ; dominant modes ; North Indian Ocean ; SUMMER MONSOON ; INTENSIFICATION ; INTENSITY ; PACIFIC
Abstract
The thermal energy needed for the development of hurricanes and monsoons as well as any prolonged marine weather event comes from layers in the upper oceans, not just from the thin layer represented by sea surface temperature alone. Ocean layers have different modes of thermal energy variability because of the different time scales of ocean-atmosphere interaction. Although many previous studies have focused on the influence of upper ocean heat content (OHC) on tropical cyclones and monsoons, no study thus farparticularly in the North Indian Ocean (NIO)has specifically concluded the types of dominant modes in different layers of the ocean. In this study, we examined the dominant modes of variability of OHC of seven layers in the NIO during 1998-2014. We conclude that the thermal variability in the top 50 m of the ocean had statistically significant semiannual and annual modes of variability, while the deeper layers had the annual mode alone. Time series of OHC for the top four layers were analyzed separately for the NIO, Arabian Sea, and Bay of Bengal. For the surface to 50 m layer, the lowest and the highest values of OHC were present in January and May every year, respectively, which was mainly caused by the solar radiation cycle.
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Publisher
Place of Publication
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Summary Language
Original Title
Series Editor
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Series Volume
Series Issue
Edition
ISSN
2225-1154
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ rl18 @
Serial
986
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Author
Bentamy, A. ; Piollé, J.F. ; Grouazel, A. ; Danielson, R. ; Gulev, S. ; Paul, F. ; Azelmat, H. ; Mathieu, P.P. ; von Schuckmann, K. ; Sathyendranath, S. ; Evers-King, H. ; Esau, I. ; Johannessen, J.A. ; Clayson, C.A. ; Pinker, R.T. ; Grodsky, S.A. ; Bourassa, M. ; Smith, S.R. ; Haines, K. ; Valdivieso, M. ; Merchant, C.J. ; Chapron, B. ; Anderson, A. ; Hollmann, R. ; Josey, S.A.
Title
Review and assessment of latent and sensible heat flux accuracy over the global oceans
Type
$loc['typeJournal Article']
Year
2017
Publication
Remote Sensing of Environment
Abbreviated Journal
Remote Sensing of Environment
Volume
201
Issue
Pages
196-218
Keywords
Ocean Heat Flux ; Latent heat flux ; Sensible heat flux ; Ocean heat content ; Scatterometer ; Surface wind ; Specfic air humidity ; OceanSites ; Remotely sensed data
Abstract
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Publisher
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Series Editor
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Series Issue
Edition
ISSN
0034-4257
ISBN
Medium
Area
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Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
232
Permanent link to this record
Author
Bhowmick, S. A. ; Agarwal, N. ; Ali, M. M. ; Kishtawal, C. M. ; Sharma, R.
Title
Role of ocean heat content in boosting post-monsoon tropical storms over Bay of Bengal during La-Nina events
Type
$loc['typeJournal Article']
Year
2019
Publication
Climate Dynamics
Abbreviated Journal
Volume
52
Issue
12
Pages
7225-7234
Keywords
La-Niña ; Bay of Bengal ; Tropical cyclones ; Ocean heat content
Abstract
This study aims to analyze the role of ocean heat content in boosting the post-monsoon cyclonic activities over Bay of Bengal during La-Niña events. In strong La-Niña years, accumulated cyclone energy in Bay of Bengal is much more as compared to any other year. It is observed that during late June to October of moderate to strong La-Nina years, western Pacific is warmer. Sea surface temperature anomaly of western Pacific Ocean clearly indicates the presence of relatively warmer water mass in the channel connecting the Indian Ocean and Pacific Ocean, situated above Australia. Ocean currents transport the heat zonally from Pacific to South eastern Indian Ocean. Excess heat of the southern Indian Ocean is eventually transported to eastern equatorial Indian Ocean through strong geostrophic component of ocean current. By September the northward transport of this excess heat from eastern equatorial Indian Ocean to Bay of Bengal takes place during La-Nina years boosting the cyclonic activities thereafter.
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Series Editor
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Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
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Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
71
Permanent link to this record
Author
Chen, X. ; Zhang, Y. ; Zhang, M. ; Feng, Y. ; Wu, Z. ; Qiao, F. ; Huang, N.E.
Title
Intercomparison between observed and simulated variability in global ocean heat content using empirical mode decomposition, part I: modulated annual cycle
Type
$loc['typeJournal Article']
Year
2013
Publication
Climate Dynamics
Abbreviated Journal
Clim Dyn
Volume
41
Issue
11-12
Pages
2797-2815
Keywords
Ocean heat content ; Modulated annual cycle ; Empirical mode decomposition ; Instantaneous frequency ; Instantaneous amplitude ; CMIP3
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
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Series Editor
Series Title
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Series Volume
Series Issue
Edition
ISSN
0930-7575
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
209
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Author
Griffies, S.M. ; Yin, J. ; Durack, P.J. ; Goddard, P. ; Bates, S.C. ; Behrens, E. ; Bentsen, M. ; Bi, D. ; Biastoch, A. ; Böning, C.W. ; Bozec, A. ; Chassignet, E. ; Danabasoglu, G. ; Danilov, S. ; Domingues, C.M. ; Drange, H. ; Farneti, R. ; Fernandez, E. ; Greatbatch, R.J. ; Holland, D.M. ; Ilicak, M. ; Large, W.G. ; Lorbacher, K. ; Lu, J. ; Marsland, S.J. ; Mishra, A. ; George Nurser, A.J. ; Salas y Mélia, D. ; Palter, J.B. ; Samuels, B.L. ; Schröter, J. ; Schwarzkopf, F.U. ; Sidorenko, D. ; Treguier, A.M. ; Tseng, Y.-heng ; Tsujino, H. ; Uotila, P. ; Valcke, S. ; Voldoire, A. ; Wang, Q. ; Winton, M. ; Zhang, X.
Title
An assessment of global and regional sea level for years 1993-2007 in a suite of interannual CORE-II simulations
Type
$loc['typeJournal Article']
Year
2014
Publication
Ocean Modelling
Abbreviated Journal
Ocean Modelling
Volume
78
Issue
Pages
35-89
Keywords
Sea level ; CORE global ocean-ice simulations ; Steric sea level ; Global sea level ; Ocean heat content
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
1463-5003
ISBN
Medium
Area
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Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
128
Permanent link to this record
Author
Krishnamurti, T.N. ; Jana, S. ; Krishnamurti, R. ; Kumar, V. ; Deepa, R. ; Papa, F. ; Bourassa, M.A. ; Ali, M.M.
Title
Monsoonal intraseasonal oscillations in the ocean heat content over the surface layers of the Bay of Bengal
Type
$loc['typeJournal Article']
Year
2017
Publication
Journal of Marine Systems
Abbreviated Journal
Journal of Marine Systems
Volume
167
Issue
Pages
19-32
Keywords
Intraseasonal oscillations ; Ocean heat content ; Bay of Bengal
Abstract
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Corporate Author
Thesis
Publisher
Place of Publication
Editor
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Summary Language
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Series Editor
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Series Volume
Series Issue
Edition
ISSN
0924-7963
ISBN
Medium
Area
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Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
64
Permanent link to this record
Author
Nagamani, P.V. ; Ali, M.M. ; Goni, G.J. ; Udaya Bhaskar, T.V.S. ; McCreary, J.P. ; Weller, R.A. ; Rajeevan, M. ; Gopala Krishna, V.V. ; Pezzullo, J.C.
Title
Heat content of the Arabian Sea Mini Warm Pool is increasing
Type
$loc['typeJournal Article']
Year
2016
Publication
Atmospheric Science Letters
Abbreviated Journal
Atmos. Sci. Lett.
Volume
17
Issue
1
Pages
39-42
Keywords
tropical cyclone heat potential ; Arabian Sea Mini Warm Pool ; satellite altimetry ; ocean heat content ; all India monsoon rainfall
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
1530261X
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
47
Permanent link to this record