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Registros recuperados: 4
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SST subseasonal variability in the central Benguela upwelling system as inferred from satellite observations (1999-2009) ArchiMer
Goubanova, Katerina; Illig, Serena; Machu, Eric; Garcon, Veronique; Dewitte, Boris.
Subseasonal variability of Sea Surface Temperature (SST) in the central Benguela upwelling system is investigated using TMI satellite-derived data over the period 1999-2009. Spatial patterns and time-frequency characteristics of subseasonal variability are documented based on Empirical Orthogonal Functions (EOF) decomposition and wavelet analysis. Despite the land contamination of the TMI satellite data within approximately 100 km off the coast the first EOF of SST anomalies allows characterizing the coastal upwelling variability at the subseasonal scale. Two regimes of variability are evidenced: a submonthly (2-30 days) regime with a dominant 11 days oscillation and a lower frequency intraseasonal (30-90 days) regime with a dominant 61 days oscillation....
Tipo: Text Palavras-chave: Benguela upwelling; Satellite observations; Intraseasonal variability; Wind-SST relationship; Mean vertical stratification; Antarctic oscillation.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00164/27565/25928.pdf
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CIRENE Air-Sea Interactions in the Seychelles-Chagos Thermocline Ridge Region ArchiMer
Vialard, Jerome; Duvel, J. P.; Mcphaden, M. J.; Bouruet-aubertot, P.; Ward, Ben; Key, E.; Bourras, D.; Weller, Robert; Minnett, P.; Weill, A.; Cassou, C.; Eymard, L.; Fristedt, T.; Basdevant, C.; Dandonneau, Y.; Duteil, O.; Izumo, T.; De Boyer Montegut, Clement; Masson, S.; Marsac, F.; Menkes, C.; Kennan, S..
A field experiment in the southwestern Indian Ocean provides new insights into ocean-atmosphere interactions in a key climatic region.
Tipo: Text Palavras-chave: Madden julian oscillation; Southwest indian ocean; Surface temperature; Mixed layer; Intraseasonal variability; Rainfall variability; Tropical cyclones; Western pacific; Dipole mode; El nino.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00185/29634/27990.pdf
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Intraseasonal variability of nearshore productivity in the Northern Humboldt Current System: the role of coastal trapped waves ArchiMer
Echevin, Vincent; Albert, Aurelie; Levy, Marina; Graco, Michelle; Aumont, Olivier; Pietri, Alice; Garric, Gilles.
The impact of intraseasonal coastal-trapped waves on the nearshore Peru ecosystem is investigated using observations and a regional eddy-resolving physical-ecosystem coupled model. Model results show that intraseasonal variability over the period 2000–2006 represents about one fourth of the total surface chlorophyll variance and one third of the carbon export variance on the Peruvian shelf. Evidence is presented that subsurface nutrient and chlorophyll intraseasonal variability are mainly forced by the coastally trapped waves triggered by intraseasonal equatorial Kelvin waves reaching the south american coast, and propagate poleward along the Peru shore at a speed close to that of high order coastal trapped waves modes. The currents associated with the...
Tipo: Text Palavras-chave: Coastally trapped waves; Upwelling dynamics; Humboldt system; Intraseasonal variability; Primary productivity.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00166/27692/25885.pdf
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RAMA The Research Moored Array for African-Asian-Australian Monsoon Analysis and Prediction ArchiMer
Mcphaden, M. J.; Meyers, G.; Ando, K.; Masumoto, Y.; Murty, V. S. N.; Ravichandran, M.; Syamsudin, F.; Vialard, Jerome; Yu, L.; Yu, W..
The Indian Ocean is unique among the three tropical ocean basins in that it is blocked at 25 degrees N by the Asian landmass. Seasonal heating and cooling of the land sets the stage for dramatic monsoon wind reversals, strong ocean atmosphere interactions, and intense seasonal rains over the Indian subcontinent, Southeast Asia, East Africa, and Australia. Recurrence of these monsoon rains is critical to agricultural production that supports a third of the world's population. The Indian Ocean also remotely influences the evolution of El Nino-Southern Oscillation (ENSO), the North Atlantic Oscillation (NAO), North American weather, and hurricane activity. Despite its importance in the regional and global climate system though, the Indian Ocean is the most...
Tipo: Text Palavras-chave: Madden julian oscillation; Tropical indian ocean; Sea heat fluxes; Intraseasonal variability; Equatorial currents; Summer monsoon; Interannual variability; Arabian sea; El nino; Rainfall variability.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00185/29632/27992.pdf
Registros recuperados: 4
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