Abstract: The influence of the Andes Cordillera on transient disturbances is investigated in this study using a lag-correlation analysis. This analysis shows that the unfiltered geopotential height data have a wavelike pattern moving ...

Abstract: n this paper, the authors suggest a dynamical mechanism involved in the revival of the summer monsoon after breaks. In this context, the authors carry out a diagnostic analysis using the datasets from National Centers for ...

Abstract: The frequency of surface cyclogenesis over South America (approximately the area enclosed by 15°?50°S and 30°?90°W) has been calculated using, 10 years (1979?1988) of data. The frequency of cyclogenesis is more in winter ...

Abstract: A linear stability analysis of the hyperbolic tangent profiles is made. A Boussinesq primitive equation model with high vertical resolution is used. Unstable modes of intermediate scales (Lx ≈ 1000 km) are generated when ...

Abstract: A biosphere model based on BATS (Biosphere?Atmosphere Transfer Scheme) is coupled to a primitive equation global statistical?dynamical model in order to study the climatic impact due to land surface alterations. The fraction ...

Abstract: Cold cloud index (CCI) data derived from Meteosat infrared imagery are used to detect periodicities in convective activity in South America. The generally used Fourier transform (FT) cannot provide time-localized information ...