Abstract: The concept of dividing the year into four seasons is reexamined to appraise critically the relative merit of two commonly used definitions of the seasons: 1) the astronomical definition, and 2) the meteorological breakdown ...

Abstract: The distribution of the mean westerly wind over the globe is described for June, July and August, the southern winter, using analyses from the European Centre for Medium Range Weather Forecasts (ECMWF) from 1979 to 1982. ...

Abstract: From 1979 to 1989, global European Centre for Medium Range Weather Forecasts (ECMWF) analyses of many meteorological variables important in baroclinic storms have been bandpass filtered to highlight fluctuations on 2- to ...

Abstract: The development of a nine-layer, quasi-geostrophic, highly truncated spectral model of the atmosphere is described. The model is global, extends to 0.05 mb (71 km) with roughly 10-km resolution in the stratosphere, and ...

Abstract: Numerical time integrations of a nine-layer, quasi-geostrophic, highly truncated spectral model of the atmosphere are used to study tropospheric-stratospheric interaction with particular regard to sudden stratospheric ...

Abstract: Nearly eight years of daily Southern Hemisphere analyses at 500 mb have been used to define the spatial dependence of the variance fields of geopotential height and the two geostrophic wind components, the corresponding ...

Abstract: The zonally asymmetric component of the 500 mb flow in the Southern Hemisphere has been analyzed into wavenumber space, and the annual cycle and interannual variability are documented for the period May 1972?January 1978. ...

Abstract: An analysis has been made of the means and variability of the 500 mb field in the Southern Hemisphere, with accent on the zonal means of geopotential height and westerly wind. Long-term means for May 1972-January 1978 are ...

Abstract: An analysis has been made of the interseasonal and interannual variability of mean circulation and eddy statistics for both summer and winter in the Southern Hemisphere. Total variance fields of geopotential height, the ...

Abstract: The utility of a simple index for monitoring the Southern Oscillation signal is explored in detail. Based upon sea level pressure data at the two stations Tahiti (T) and Darwin (D), an optimal index, in the sense that it ...