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The 11-yr solar cycle in ERA-40 data: an update to 2008

Frame, T. H. A. and Gray, L. J. (2010) The 11-yr solar cycle in ERA-40 data: an update to 2008. Journal of Climate, 23 (8). pp. 2213-2222. ISSN 1520-0442

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To link to this item DOI: 10.1175/2009JCLI3150.1


Multiple linear regression is used to diagnose the signal of the 11-yr solar cycle in zonal-mean zonal wind and temperature in the 40-yr ECMWF Re-Analysis (ERA-40) dataset. The results of previous studies are extended to 2008 using data from ECMWF operational analyses. This analysis confirms that the solar signal found in previous studies is distinct from that of volcanic aerosol forcing resulting from the eruptions of El Chichón and Mount Pinatubo, but it highlights the potential for confusion of the solar signal and lower-stratospheric temperature trends. A correction to an error that is present in previous results of Crooks and Gray, stemming from the use of a single daily analysis field rather than monthly averaged data, is also presented.

Item Type:Article
Divisions:Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:17713
Uncontrolled Keywords:Solar cycle, Numerical analysis/modeling, Statistical techniques, Irradiance, Climate variability, Aerosols, Stratosphere, Temperature
Publisher:American Meteorological Society

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