Abstract: Estimates of the natural variability of monthly-mean sea-level pressure are made based on a 74-year, grid-point data set. The natural variability of monthly means is defined as those interannual fluctuations that can be ...

Abstract: An examination of 30 mb data from eight winter seasons reveals that out-of-phase temperature oscillations occur regularly on either side of 60°N. The typical time scale of these oscillations is 1?3 weeks. Evidence is ...

Abstract: No abstract available.

Abstract: Daily rawinsonde data from 19 near-equatorial stations are examined to learn more about annual variations of the 40?50 day oscillations. Lengths of the available time series range from 5 to 28 years. A technique is devised ...

Abstract: It is hypothesized that the interference of stationary and traveling waves of the same longitudinal can cause some of the observed time variations in the large-scale circulation. To explore this hypothesis the eight-winter ...

Abstract: A simple method for approximating the variance of meteorological time averages is presented. Graphs of the characteristic time between independent estimates and the ratio of the variance of time-averaged data to that of ...

Abstract: Evidence of regularly propagating, large-scale waves is found in a 73-year record of Northern Hemisphere sea-level pressure data and in a nine-year record of upper air data. Cross-spectrum analyses indicate that south of ...

Abstract: AbstractSeveral important developments in the 1960s showed the way to using spectral analysis to identify and describe atmospheric waves predicted by theory. Among these waves were normal-mode Rossby?Haurwitz waves (NMRHWs). ...

Abstract: No abstract available.

Abstract: The average structure of westward traveling disturbances that contribute to relative maxima found in space-time spectra from 13?32 days at northern latitudes is determined for each season. A compositing method used employs ...