Results 181 to 190 of about 9,534 (213)

Quasi-Biennial Oscillation in Ozone

Journal of the Atmospheric Sciences, 1967
Abstract Harmonic analyses of mean monthly ozone data, after the annual cycle has been removed, have shown the existence of the quasi-biennial oscillation with a period of about 26 months. It extends from the equator to the temperate and polar latitudes in the Northern Hemisphere.
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Atmospheric Quasi-Biennial Oscillations

Monthly Weather Review, 1980
Abstract A detailed analysis has been made of a quasi-biennial oscillation (QBO) in the tropospheric ultralong waves of the Southern Hemisphere and interrelationships with the QBO in zonal mean westerly winds of the equatorial stratosphere. In spite of the fact that highly significant spectral peaks at a period close to 26 months occur in both ...
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KINETIC ENERGY AND QUASI-BIENNIAL OSCILLATION

Monthly Weather Review, 1971
The modulation of the vertical flux of kinetic energy to the stratosphere by the pressure-work effect at 100 mb is compared with variations in the hemispheric kinetic energy, the horizontal momentum and heat transports at 'low' latitudes, and the tropical zonal wind and temperature for the lower stratosphere.
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Interaction of the quasi‐biennial oscillation and stratopause semiannual oscillation

Journal of Geophysical Research: Atmospheres, 1997
Analysis of rawinsonde and rocketsonde data at Ascension Island (7.6°S, 14.4°W) and Kwajalein (8.7°N, 167°E) in 1962–1991 suggests that the quasi‐biennial oscillation (QBO) in the middle stratosphere is synchronized with the seasonal cycle and that descending westerly phases of the stratopause semiannual oscillation (SAO) are strongly influenced by the
Timothy J. Dunkerton, Donald P. Delisi
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Nonlinear relation of the Arctic oscillation with the quasi-biennial oscillation

Climate Dynamics, 2010
A nonlinear principal component analysis (NLPCA) is applied to a set of monthly mean time series from January 1956 to December 2007 consisting of the Arctic oscillation (AO) index derived from 1,000-hPa geopotential height anomalies poleward of 20°N latitude and the zonal winds observed at seven pressure levels between 10 and 70 hPa in the equatorial ...
Bei-Wei Lu, Lionel Pandolfo
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Quasi-Biennial Oscillations in Tropospheric Energy

Monthly Weather Review, 1974
Abstract Evidence is presented for an approximate year-to-year variation of the zonal available potential (AZ), eddy available potential (AE), zonal kinetic (KZ) and eddy kinetic energy (KE) in the extra-tropical troposphere between 1962 and 1971. A modification of the oscillations occurs after 1968 due to as yet undetermined causes, but prior to this ...
A. J. Miller, J. K. Angell, J. Korshover
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A model of the quasi-biennial oscillation on an equatorial beta-plane

Quarterly Journal of the Royal Meteorological Society, 1982
AbstractAn equatorial beta‐plane model of equatorial wave‐mean flow interaction in the lower stratosphere is described. Kelvin and mixed Rossby‐gravity waves generated by a specified forcing on the lower boundary radiate upward through the model domain where they are subject to thermal and mechanical dissipation.
R. Alan Plumb, Robert C. Bell
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A quasi‐biennial oscillation in the intensity of the intra‐seasonal oscillation

International Journal of Climatology, 1990
AbstractThe interannual and annual variations in the intra‐seasonal oscillation (ISO) are examined using upper air radiosonde data at Singapore. Spectral analysis of the zonal wind using the maximum entropy method (MEM) was made for each season, starting from the autumn of 1960 through to 1985.
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A Multiwave Model of the Quasi-biennial Oscillation

Journal of the Atmospheric Sciences, 1990
Abstract A simple one-dimensional model of the quasi-biennial oscillation is discussed. Our model is essentially a generalization of the Holton–Lindzen models. We consider a large number of vertically propagating internal waves interacting simultaneously with the mean flow.
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Sunspot Cycle and the Quasi-biennial Stratospheric Oscillation

Nature, 1968
PREVIOUS communications1,2 reported observations from the southern hemisphere indicating an attenuation of the quasi-biennial stratospheric oscillation in the years 1963–64. The 24 to 26 month cycles of wind and temperature in the lower stratosphere, and of total ozone, weakened or vanished after a series of pronounced cycles2,3 in the years 1955 to ...
F. A. BERSON, R. N. KULKARNI
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