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Ribera, P. ; Peña Ortiz, C. ; García Herrera, Ricardo ; Gallego, D. ; Gimeno, L. ; Hernández Martín, Emiliano | American Geophysical Union | 2004-09-23The quasi-biennial oscillation (QBO) signal in stratospheric zonal and meridional wind, temperature, and geopotential height fields is analyzed based on the use of the National Centers for Environmental Prediction (NCEP) reanalysis (1958-2001). [...]texto impreso
Peña Ortiz, C. ; Ribera, P. ; García Herrera, Ricardo ; Giorgetta, M. A. ; García, R. R. | American Geophysical Union | 2008-08-21The seasonality of the quasi-biennial oscillation (QBO) and its secondary circulation is analyzed in the European Reanalysis (ERA-40) and Middle Atmosphere European Centre Hamburg Model (MAECHAM5) general circulation model data sets through the [...]texto impreso
Peña Ortiz, C. ; García Herrera, Ricardo ; Ribera, P. ; Calvo Fernández, Natalia | http://dx.doi.org/10.1196/annals.1446.007 | 2008The quasibiennial oscillation (QBO) dominates the variability of the equatorial stratosphere and also affects the circulation and temperature of the extratropical region. In this paper we review previous work showing that the mid- to high-latitu[...]texto impreso
Peña Ortiz, C. ; Barriopedro Cepero, David ; García Herrera, Ricardo | American Meteorological Society | 2015-07This study analyzes the multidecadal variability of the European summer timing and length. The dates of the summer onset and end are computed through an objective algorithm based on locally defined temperature thresholds applied to the European [...]texto impreso
Gallego, D. ; García Herrera, Ricardo ; Prieto, R. ; Peña Ortiz, C. | Copernicus Gesellschaft MBH | 2008One of the main problems in climate reconstruction from documentary sources is the evaluation of the quality of non instrumental meteorological records in absence of instrumental observations to perform a calibration. In these cases it is mandat[...]texto impreso
Calvo Fernández, Natalia ; Giorgetta, M. A. ; Peña Ortiz, C. | American Geophysical Union | 2007-05-30The polar vortex in the Northern Hemisphere exhibits high intraseasonal and interannual variability which, to some degree, may be controlled by the quasi-biennial oscillation (QBO) in the tropical stratosphere. Here we analyze the QBO signal in [...]
