Abstract: Intraseasonal variations in the Southern Hemisphere atmospheric circulation have been examined through the application of a 10?50?day bandpass filter to daily ECMWF analyses for 1980?88. Variations on this time scale ...

Abstract: The time and spatial variation of the Southern Hemisphere 500 hPa zonal wind has been examined using spectral analysis, bandpass filtering, and empirical orthogonal function (EOF) analysis applied to a 15-year sample of ...

Abstract: An analysis has been made of variations in the atmospheric circulation with periods of more than 50 days occurring in the Southern Hemisphere between 1980 and 1986, using analyses produced by the European Centre for Medium ...

Abstract: Eigenvector or principal component analysis has been carried out on monthly means of surface pressure, temperature, and rainfall defined on grids extending over both hemispheres and the tropical belt. In each case, 10 out ...

Abstract: Principal component analysis of tropical surface data over the period 1951?1960 suggests the Southern Oscillation can be represented by the first components of pressure, temperature, and rainfall. The patterns obtained are ...

Abstract: Analysis of the zonal wind variations during the Southern Hemisphere winter of 1979 has shown the existence of an irregular cycle with an average period of 27 days. Opposing variations in the 500 hPa zonal wind are found ...

Abstract: Analysis of the 300-hPa streamfunction from the 40-year NCEP?NCAR dataset has identified the principal modes of Southern Hemisphere variability on intraseasonal (IS), interannual (IA), and intradecadal (ID) timescales. The ...

Abstract: An index cycle occurring in the Northern Hemisphere during the late winter and spring of 1979 has been examined in detail using the ECMWF Level IIIb data set. The cycle has an average period of around 25 days and is most ...

Abstract: The CSIRO9 general circulation model shows a zonally symmetric mode of variability, which closely resembles the high-latitude mode (HLM) in middle and high latitudes of the Southern Hemisphere. The leading EOF of the zonal ...

Abstract: The respective merits of statistical and regional modeling techniques for downscaling GCM predictions have been evaluated over New Zealand, a small mountainous country surrounded by ocean. The boundary conditions were ...