Consulta: subjectFacets:"Phenomena"
Registros recuperados: 5
Data/hora: 27/07/2024 02:50:40

A Lagrangian Method to Isolate the Impacts of Mixed Layer Subduction on the Meridional Overturning Circulation in a Numerical Model
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thomas, Matthew; Treguier, Anne-marie; Blanke, Bruno; Deshayes, Julie; Voldoire, Aurore.
Large differences in the Atlantic meridional overturning circulation (AMOC) exhibited between the available ocean models pose problems as to how they can be interpreted for climate policy. A novel Lagrangian methodology has been developed for use with ocean models that enables a decomposition of the AMOC according to its source waters of subduction from the mixed layer of different geographical regions. The method is described here and used to decompose the AMOC of the Centre National de Recherches Météorologiques (CNRM) ocean model, which is approximately 4.5 Sv (1 Sv = 106 m3 s−1) too weak at 26°N, compared to observations. Contributions from mixed layer subduction to the peak AMOC at 26°N in the model are dominated by the Labrador Sea, which contributes...
Tipo: Text
Palavras-chave: Circulation; Dynamics; Convection; Lagrangian circulation; Transport; Meridional overturning circulation; Atm; Ocean Structure; Phenomena; Oceanic mixed layer; Models and modeling; General circulation models.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00284/39523/38016.pdf

On Growth Rate of Wind Waves: Impact of Short-Scale Breaking Modulations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kudryavtsev, Vladimir; Chapron, Bertrand.
The wave generation model based on the rapid distortion concept significantly underestimates empirical values of the wave growth rate. As suggested before, inclusion of the aerodynamic roughness modulations effect on the amplitude of the slope-correlated surface pressure could potentially reconcile this model approach with observations. This study explores the role of short-scale breaking modulations to amplify the growth rate of modulating longer waves. As developed, airflow separations from modulated breaking waves result in strong modulations of the turbulent stress in the inner region of the modulating waves. In turn, this leads to amplifying the slope-correlated surface pressure anomalies. As evaluated, such a mechanism can be very efficient for...
Tipo: Text
Palavras-chave: Atm; Ocean Structure; Phenomena; Atmosphere-ocean interaction.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00313/42414/41759.pdf

RAINFALL PROBABILITY ESTIMATES FOR SELECTED LOCATIONS OF SEMI-ARID INDIA
Provedor de dados: Open Acess Agriculture Research Repository
Autores: S.M.
Palavras-chave: Precipitation; Selection; Seasons; Dry season; Wet season; Purification; Phenomena; Crops; Farming systems; Weather hazards.
Ano: 1982
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3982

Rainfall probability estimates for selected locations of semi-arid India
Provedor de dados: Open Acess Agriculture Research Repository
Autores: S.M.
Palavras-chave: Precipitation; Selection; Seasons; Dry season; Wet season; Purification; Phenomena; Crops; Farming systems; Weather hazards.
Ano: 1982
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4160

Response of North-Atlantic Ocean circulation to atmospheric weather regimes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Barrier, Nicolas; Cassou, Christophe; Deshayes, Julie; Treguier, Anne-marie.
A new framework is proposed for investigating the atmospheric forcing of North-Atlantic ocean circulation. Instead of using classical modes of variability, such as the North-Atlantic Oscillation (NAO) or the East-Atlantic Pattern, we here use the weather regimes paradigm. Using this framework we avoid problems associated with the assumptions of orthogonality and symmetry that are particular to modal analysis and known to be unsuitable for the NAO.  Using ocean-only historical and sensitivity experiments, we investigate the impacts of the four winter weather regimes on horizontal and overturning circulations. Our results suggest that the Atlantic Ridge (AR), NAO− and NAO+ regimes induce a fast (monthly to interannual timescales) adjustment of the gyres via...
Tipo: Text
Palavras-chave: Circulation; Dynamics; Meridional overturning circulation; Atm; Ocean Structure; Phenomena; Gyres; North Atlantic Oscillation; Wind; Physical Meteorology and Climatology; Climate classification; Regimes; Models and modeling; Ocean models.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00161/27258/25467.pdf