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Showing 1 to 8 of 8 for “"QUASI BIENNIAL OSCILLATION"”.
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Influence of the Quasi-biennial Oscillation on Interannual Variability in the Northern Hemisphere Winter Stratosphere
… stratosphere is strongly correlated with the quasi-biennial oscillation (QBO) of tropical stratospheric winds, particularly during early winter. Most current general circulation models (GCMs) do not exhibit a QBO and therefore do not represent this important mode of tropical-extratropical …
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Radiative Forcing and Climatic Impact of the Mount Pinatubo Volcanic Eruption
… is explained in part by the influences of the quasi-biennial oscillation and the observed ozone depletion, which were not included in the ensemble simulations. The influence of the ocean on the simulated climatic responses of the atmosphere to the Pinatubo aerosol forcing was also examined …
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Quasi-objective Nonlinear Principal Component Analysis and applications to the atmosphere
… employing the subjective methods and is called quasi-objective. The compact NLPCA is applied to the zonal winds observed at seven pressure levels between 10 and 70 hPa in the equatorial stratosphere to represent the Quasi-Biennial Oscillation (QBO) and investigate its variability and structure. …
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On intraseasonal variability in the tropics: tropical cyclones, the Madden-Julian Oscillation, and equatorial waves
… equatorial waves, and the Madden-Julian Oscillation (MJO). Because these phenomena have significant societal impacts on sub-seasonal time scales, and it is important to understand how they interact with the large-scale atmosphere. The first part of this thesis develops Forecasts of …
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HF Radar Observations of Inter-Annual variations in Mid-Latitude Mesospheric Winds
The equatorial Quasi Biennial Oscillation (QBO) is known to be an important source of inter-annual variability at mid and high latitudes in both hemispheres. Coupling between QBO and the polar vortex has been extensively studied over the past few decades, however, less is known about QBO influences …
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High resolution palaeoceanography and palaeoclimatology from mid and high latitude Late Cretaceous laminated sediments
… Marca Shale, reveal both sites contain strong quasi-biennial signals (mean periodicities of 27.4 and 30.4 months, respectively), inferred to relate to the Quasi-Biennial Oscillation (QBO). The CESAR 6 contains strong sub-decadal/quasi-decadal peaks interpreted to relate to Northern Hemisphere …
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Understanding the characteristics of droughts over Eastern Africa in past and future climates
… teleconnections (i.e. El Niño Southern Oscillation, ENSO; Indian Ocean Dipole, IOD; Tropical Atlantic Dipole Index, TADI; and Quasi-Biennial Oscillation, QBO) on the drought modes. The study also projects the characteristics of future droughts over eastern Africa and its major river …
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ΔΥΝΑΜΙΚΟΙ ΚΑΙ ΦΥΣΙΚΟΙ ΠΑΡΑΓΟΝΤΕΣ ΠΟΥ ΔΙΑΜΟΡΦΩΝΟΥΝ ΤΗΝ ΗΜΕΡΗΣΙΑ ΚΥΜΑΝΣΗ ΤΗΣ ΠΙΕΣΗΣ ΚΟΝΤΑ ΣΤΟ ΕΔΑΦΟΣ ΣΤΟΝ ΕΛΛΗΝΙΚΟ ΧΩΡΟ
… IN ORDER TO LOOK FOR WELL KNOWN PERIODICITIES (QUASI-BIENNIAL-OSEILLATION, SOUTHERN OSCILLATION, 11 YEARS SOLAR CYCLE) IN THE PARAMETERS OF THE HARMONIC ANALYSIS. WE ALSO LOOKED FOR THE SAME PERIODICITIES IN THE DATA OF PRESSURE (MONTHLY, DAILY, HOURLY VALUES) BEFORE THE HARMONIC ANALYSIS.