Abstract
AbstractIntroduction and background to the Stratosphere–troposphere Processes And their Role in Climate (SPARC) project, the QBOi, and the papers contained in this Special Section.
Highlights
Introduction and background to theStratosphere–troposphere Processes And their Role in Climate (SPARC) project, the Quasi-Biennial Oscillation initiative (QBOi), and the papers contained in this Special Section.KEYWORDS WCRP–SPARC, stratosphere, quasi-biennial oscillation, gravity waves, climate modellingFollowing its establishment in 1992, the Stratosphere– troposphere Processes And their Role in Climate (SPARC) core project of the World Climate Research Programme (WCRP) has included several initiatives designed to evaluate and potentially improve the representation of the stratosphere in general circulation models (GCMs)
QBO-like oscillations of descending eastward and westward winds appeared in model tropical stratospheres as non-orographic gravity wave parametrizations were introduced, provided that suitable parameter settings were used
Alongside the development of non-orographic gravity wave parametrizations in the 1990s, resolved wave forcing in the tropical lower stratosphere was found to improve with increased vertical resolution and the first realistic simulation of the QBO was by a GCM without parametrized non-orographic wave drag
Summary
Introduction and background to theStratosphere–troposphere Processes And their Role in Climate (SPARC) project, the QBOi, and the papers contained in this Special Section.KEYWORDS WCRP–SPARC, stratosphere, quasi-biennial oscillation, gravity waves, climate modellingFollowing its establishment in 1992, the Stratosphere– troposphere Processes And their Role in Climate (SPARC) core project of the World Climate Research Programme (WCRP) has included several initiatives designed to evaluate and potentially improve the representation of the stratosphere in general circulation models (GCMs). QBO-like oscillations of descending eastward and westward winds appeared in model tropical stratospheres as non-orographic gravity wave parametrizations were introduced, provided that suitable parameter settings were used.
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