Results 41 to 50 of about 23,688 (213)

The quasi‐biennial oscillation in atmospheric ozone [PDF]

Journal of Geophysical Research: Oceans, 1982
Analysis of various characteristic of the statistical spectra of total ozone covering a 15 year period (1964–1978), and of ozone in the stratosphere over a period of about 7 years, indicates that the strong QBO in the zonal winds of the tropical stratosphere is associated with a detectable, although often weak, signal in total ozone and the ozone ...
Samuel J. Oltmans, Julius London
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Extratropical signature of the quasi‐biennial oscillation [PDF]

Journal of Geophysical Research: Atmospheres, 2005
Using the assimilated data from the National Centers for Environmental Prediction (NCEP) reanalysis, we show that the extratropical signature of the tropical quasi‐biennial oscillation (QBO) is seen mostly in the North Annular Mode (NAM) of atmospheric variability.
Ruzmaikin, Alexander, Feynman, Joan, Jiang, Xun, Yung, Yuk L.   +3 more
openaire   +2 more sources

Global drivers effect in multi-annual variability of runoff

Journal of Hydrology and Hydromechanics, 2014
Changes in runoff parameters are very important for Slovakia, where stream-flow discharges, being supplied by precipitation and groundwater runoff, are preferentially influenced by climatic conditions. Therefore, teleconnections between runoff parameters,
Fendeková Miriam, Pekárová Pavla, Fendek Marián, Pekár Ján, Škoda Peter   +4 more
doaj   +1 more source

Interpreting SBUV smoothing errors: an example using the quasi-biennial oscillation [PDF]

Atmospheric Measurement Techniques, 2013
The Solar Backscattered Ultraviolet (SBUV) observing system consists of a series of instruments that have been measuring both total ozone and the ozone profile since 1970.
N. A. Kramarova, P. K. Bhartia, S. M. Frith, R. D. McPeters, R. S. Stolarski   +4 more
doaj   +1 more source

The quasi‐biennial oscillation: Analysis using ERA‐40 data [PDF]

Journal of Geophysical Research: Atmospheres, 2005
The ERA‐40 data set is used to examine the equatorial quasi‐biennial oscillation (QBO). The data set extends from the ground to 0.1 hPa (∼65 km) and covers a 44‐year period (January 1958 to December 2001), including 18.5 QBO cycles. Analysis of this data set of unprecedented spatial and temporal coverage has revealed a threefold structure in height in ...
Pascoe, C, Gray, L, Crooks, SA, Juckes, M, Baldwin, M   +4 more
openaire   +2 more sources

Windows of opportunity in subseasonal weather regime forecasting: A statistical–dynamical approach

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study explores how the atmospheric state at initialisation creates windows of opportunity for improving week 3 forecasts of weather regime activity. Greenland blocking activity increases following Madden–Julian Oscillation phases 7, 8, and 1 and weak stratospheric polar vortex states, revealing patterns exploitable by statistical models.
Fabian Mockert, Christian M. Grams, Sebastian Lerch, Julian Quinting   +3 more
wiley   +1 more source

El Niño–Southern Oscillation effect on quasi-biennial oscillations of temperature diurnal tides in the mesosphere and lower thermosphere

Earth, Planets and Space, 2018
In this study, we evaluate the El Niño–Southern Oscillation (ENSO) signals in the two dominant temperature diurnal tides, diurnal westward wavenumber 1 (DW1) and diurnal eastward wavenumber 3 (DE3) on the quasi-biennial oscillation (QBO) scale (18–34 ...
Yang-Yi Sun, Huixin Liu, Yasunobu Miyoshi, Libo Liu, Loren C. Chang   +4 more
doaj   +1 more source

Quasi‐biennial oscillation of the ionospheric wind dynamo

Journal of Geophysical Research: Space Physics, 2017
AbstractThe interannual variation of the ionospheric solar quiet (Sq) current system is examined. A dense magnetometer network over Japan enables the accurate determination of the central position of the northern Sq current loop or the Sq current focus, during 1999–2015.
Yosuke Yamazaki, Huixin Liu, Yang‐Yi Sun, Yasunobu Miyoshi, Michael J. Kosch, Martin G. Mlynczak   +5 more
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An unexpected disruption of the atmospheric quasi-biennial oscillation [PDF]

Science, 2016
One of the most repeatable phenomena seen in the atmosphere, the quasi-biennial oscillation (QBO) between prevailing eastward and westward wind jets in the equatorial stratosphere (approximately 16 to 50 kilometers altitude), was unexpectedly disrupted in February 2016.
Osprey, Scott M., Butchart, Neal, Knight, Jeff R., Scaife, Adam A., Hamilton, Kevin, Anstey, James A., Schenzinger, Verena, Zhang, Chunxi   +7 more
openaire   +3 more sources

Forecast verification using information and noise

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Verification of weather forecasts is usually expressed in terms of total error metrics. This is useful for end users of the forecasts but does not allow evaluation of the intrinsic information content of the forecasts. To overcome this limitation, we propose a new total error decomposition into information and noise error measures, connect it to ...
Massimo Bonavita, Alan J. Geer
wiley   +1 more source