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| Registros recuperados: 18 | |
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| Meyers, G.; Bailey, R.; Lindstrom, E.; Phillips, H.. |
| The Southern Oscillation Index (SOI), equatorial zonal wind, sea level anomalies at islands, sea surface temperature at Puerto Chicama Peru and mixed layer temperature and depth from the XBT ship of opportunity network are used to describe conditions during the past two ENSO episodes. Onset of sustained ENSO anomalies in the 1986/87 episode was in July 1986, one month later in the year onset of the 1982/83 episode in June 1982. Both episodes of the 1980's the usual surface temperature difference along the equator between 165°W and 160°E reversed and rapidly increased to 1°C in the order direction. ENSO warming of the central Pacific tends to be confined to the region 10°N-10°S whereas cooling of the western Pacific occurs in a broader region from... |
| Tipo: Text |
Palavras-chave: INTERACTION OCEAN ATMOSPHERE; TEMPERATURE DE SURFACE; ETUDE COMPARATIVE; ANOMALIE; FLUX THERMIQUE; ENSO. |
| Ano: 1989 |
URL: http://www.documentation.ird.fr/hor/fdi:30211 |
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| Jury, M.; Gadgil, S.; Meyers, G.; Ragoonaden, S.; Reason, C.; Sribimawati, T.; Tangang, F.. |
| We explore the path between Indian Ocean observations and monsoon dynamics, the societal impacts of interannual climate variations and applications of resource predictions in southeastern Africa, the Mascarene Islands, India, southeast Asia and Australia. Recent progress in understanding ocean dynamics associated with SST variation is reviewed. The global El Niño-Southern Oscillation (ENSO) affects monsoon winds and ocean temperatures in a manner consistent with, but lagging, the Pacific. The ENSO influence often propagates across the tropical Indian Ocean from Africa to Indonesia, modulating the tropospheric moisture flux over the Indian Ocean and rainfall in surrounding continents. An east-west dipole in SST anomalies and monsoon rainfall is identified... |
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Palavras-chave: Indian ocean; Climate impacts; SST patterns; ENSO responses. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/762 |
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| Donguy, Jean-René; Meyers, G.. |
| Expendable bathythermograph (XBT) data and the climatological temperature/salinity relationship were used to calculate the mean annual cycle of dynamic height and geostrophic transport of major currents relative to 400 db along five shipping tracks covering a large part of the tropical Pacific Ocean. The data were selected in bands centered on the most frequently repeated XBT tracklines for the period 1967-1988. Long-term bimonthly mean temperature was calculated in 1° latitude bins along the tracks. The transport function (vertically integrated dynamic height) was then calculated using the mean temperature/salinity relationship. The mean annual cycle of transport of the North Equatorial Current (NEC), the North Equatorial Countercurrent (NECC) and the... |
| Tipo: Text |
Palavras-chave: CIRCULATION OCEANIQUE; COURANT MARIN; TEMPERATURE DE SURFACE; SALINITE; CORRELATION; VARIATION ANNUELLE; ANALYSE STATISTIQUE. |
| Ano: 1996 |
URL: http://www.documentation.ird.fr/hor/fdi:010010430 |
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| Donguy, Jean-René; Meyers, G.. |
| Dynamic height was calculated from XBTs collected along several shipping routes in the western Indian Ocean. In the northern hemisphere, low dynamic heights prevail during the NE monsoon and high dynamic heights during the SW monsoon inducing an alternating Somali Current. In the southern hemisphere, at 7°-8° S a trough of low dynamic height occurs during the whole year. EOF analysis is used to document the variation of these features. The geostrophic transports calculated for the XBT routes show spatially coherent patterns with strong seasonal variations. In the Arabian Sea, an anticlockwise gyre develops during the NE monsoon alternating with a clockwise gyre during the SW monsoon. Between 5°N and 5°S, the transport variations show eastward flow twice... |
| Tipo: Text |
Palavras-chave: COURANT GEOSTROPHIQUE; HYDRODYNAMIQUE; VARIATION SAISONNIERE. |
| Ano: 1995 |
URL: http://www.documentation.ird.fr/hor/fdi:010007560 |
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| 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 |
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| Susanto, D.; Vinayachandran, P.; Hacker, P.; Masumoto, Y.; Webster, P.; Godfrey, S.; Meyers, G.. |
| Understanding and predicting the interannual variations of the whole monsoon climate system has been, and will continue to be, one of the major reasons for studying the oceanography of the Indian Ocean; but there are other reasons. Knowledge about Indian Ocean current systems may have diverse practical applications, from fisheries through search and rescue to management of Exclusive Economic Zones. Our discussion mainly concerns the open ocean and the climate applications, but the results are important for most continental shelves of the Indian Ocean region on all but the shortest timescales. We start by discussing what we know now of the Indian Ocean’s mean annual cycle, painfully gleaned from sparse observations over the last four decades. This data base... |
| Tipo: Working Paper |
Palavras-chave: Monsoons; Climate prediction. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/322 |
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| Godfrey, J.S.; Ridgway, K.; Meyers, G.; Bailey, R.. |
| Sea levels at the Papua New-Guinea (PNG) coast responded to the 1986-87 ENSO event much as would be expected for points on the inshore edge of a western boundary current, driven by remote sea level disturbances. The first EOF of sea level in the region accounts for 60% of the variance, and shows a clear western boundary current signal. Sea level estimates from tide gauges and adjacent XBT's are in good agreement, so XBT data are used to supplement sea level results; specifically, we obtain an estimate of the western boundary current as a function of depth. The anomalous transport varied by about 15 Sverdrups during the event. The boundary current followed the Tobriand Island ridge, rather than the main PNG coastline, and appears to bifurcate along southern... |
| Tipo: Text |
Palavras-chave: NIVEAU MARIN; HAUTEUR DYNAMIQUE; ENSO; 1986 1987. |
| Ano: 1989 |
URL: http://www.documentation.ird.fr/hor/fdi:30216 |
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| Donguy, Jean-René; Meyers, G.. |
| Measurements of sea-surface temperature and sea-surface salinity obtained from ships-of-opportunity are used to map the fields in the tropical Indian Ocean. The seasonal variation is described in detail along the six shipping tracks that have the best data coverage : Gulf of Aden to La Reunion island, Persian Gulf to Cape Town, Gulf of Aden to east Africa, Gulf of Aden to Indonesia, Sri Lanka to Torres Strait through Malacca Strait, and along the west coast of Australia. Seasonal variation with large amplitude is found in an extensive area in the western Indian Ocean. In the eastern Indian Ocean, seasonal variation is small, except where it is linked to local features such as coastal upwelling, local wind or rainfall-runoff. Water masses, defined from the... |
| Tipo: Text |
Palavras-chave: OCEAN; TEMPERATURE DE SURFACE; SALINITE; VARIATION SAISONNIERE; VARIATION ANNUELLE; VARIATION SPATIALE. |
| Ano: 1996 |
URL: http://www.documentation.ird.fr/hor/fdi:010007558 |
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| Mcphaden, M. J.; Meyers, G.; Ando, K.; Masumoto, Y.; Murty, V. S. N.; Ravichandran, M.; Syamsudin, F.; Vialard, Jerome; Yu, L.; Yu, W.. |
| Tipo: Text |
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| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00185/29633/27991.pdf |
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| Registros recuperados: 18 | |
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