Temporal evolution of S2 atmospheric tide as represented in reanalysis databases

  1. Javier Díaz de Argandoña González 1
  2. Agustín Ezcurra Talegón 1
  3. Jon Sáenz Aguirre 1
  4. Gabriel Ibarra-Berastegi 1
  1. 1 Universidad del País Vasco/Euskal Herriko Unibertsitatea

    Universidad del País Vasco/Euskal Herriko Unibertsitatea

    Lejona, España

    ROR https://ror.org/000xsnr85

Cambio climático. Extremos e impactos: [ponencias presentadas al VIII Congreso Internacional de la Asociación Española de Climatología]
  1. Concepción Rodríguez Puebla (coord.)
  2. Antonio Ceballos Barbancho (coord.)
  3. Nube González Reviriego (coord.)
  4. Enrique Morán Tejeda (coord.)
  5. Ascensión Hernández Encinas (coord.)

Publisher: Asociación Española de Climatología

ISBN: 978-84-695-4331-3

Year of publication: 2012

Pages: 311-318

Congress: Asociación Española de Climatología. Congreso (8. 2012. Salamanca)

Type: Conference paper


Temporal evolution of the semidiurnal component of the solar atmospheric tide (S2) has been assessed using six reanalysis databases. The motivation for this work is twofold: first, to validate the interpolation method commonly used (reanalysis data are generally available every 6 hours, just in S2 Nyquist frequency). And second, as the main forcing of the atmospheric tide is the UV absorption in the ozone layer and, to a lesser extent, the IR absorption by water in the troposphere, its amplitude could eventually be used as a proxy for these magnitudes. The main results of this study are: i) the usual interpolation method is basically correct to evaluate mean zonal nearequatorial semidiurnal tide; ii) the static calculation of the tide (i.e. using the whole time span as it is usually done) can be misleading, as a number of spurious years are present in some reanalysis; iii) S2 tide variation presents two frequencies at 1 year and 6 months periods; iv) the results from different reanalysis show a great variability and no clear, common pattern in their temporal evolution has been found.