Redirigiendo al acceso original de articulo en 21 segundos...
Inicio  /  Atmosphere  /  Vol: 9 Núm: 2 Par: Februar (2018)  /  Artículo
ARTÍCULO
TITULO

The 30?50-Day Intraseasonal Oscillation of SST and Precipitation in the South Tropical Indian Ocean

Yun Liang    
Yan Du    
Lianyi Zhang    
Xiaotong Zheng and Shuang Qiu    

Resumen

The Sea Surface Temperature (SST) in the South Tropical Indian Ocean (STIO) displays significant intraseasonal oscillation (ISO) in two regions. A striking 30?50-day ISO found over the east of thermocline ridge (Region A, 80?90° E, 6?12° S), as identified by the Empirical Mode Decomposition (EMD) method, is distinguished from the SST signature over the thermocline ridge (Region B, 52.5?65° E, 6?13° S). The 30?50-day ISO of SST in the Region A is active in March?May (MAM) and suppressed in September?November (SON). Meanwhile, a 30?50-day ISO of precipitation correlates with the SST over the Region A. SST leads precipitation by 10 days, implying a pronounced ocean?atmosphere interaction at the intraseasonal timescale, especially the oceanic feedback to the atmosphere during Madden?Julian Oscillation (MJO) events. Analysis on mechanism of the ISO manifests heat fluxes are critical to the development of the intraseasonal SST variability. The local thermocline in Region A, as the shallowest in MAM and the thickest in SON, is likely to modulate the strength of ISO and contribute to its sustainability. It suggests that thermocline plays a more important role in Region A than in Region B, leading to the difference between the two regions.

 Artículos similares

       
 
Scott Curtis    
The Madden-Julian Oscillation (MJO) is an important intraseasonal climate signal which circles the global tropics, but also impacts extratropical weather regimes. Few studies have investigated whether the MJO is a source of regional seasonal climate pred... ver más
Revista: Atmosphere

 
Mariano S. Alvarez, Carolina S. Vera and George N. Kiladis    
Intraseasonal (IS) variability in South America is efficiently described through the first empirical orthogonal function of filtered precipitation or outgoing longwave radiation (OLR) anomalies. In the 30?90-day band, the leading OLR pattern between Octo... ver más
Revista: Atmosphere

 
P. J. ENGLEHART,A. V. DOUGLAS    
This study explores the interannual variability in Mexico's warm season rainfall. It is based on historical rainfall data (1927-1997) from a grid of 130 long-term stations. The grid provides reasonable spatial coverage over most of the country. Using... ver más
Revista: Atmósfera