S-RIP chapter on the QBO and tropical variability

How well observed is the quasi-biennial oscillation (QBO) of tropical stratospheric winds? Most reanalyses exhibit a QBO, but these QBOs can differ. We will assess the representation of the QBO and tropical stratospheric variability in different reanalyses, comparing them to each other and to observations. The results will comprise the "QBO and tropical variability" chapter of the S-RIP Report, part of the SPARC report series.

At the bottom of this page are various links, including a list of chapter contributors and projects. New contributors are very welcome - if you are interested, and have expertise in a research field related to the QBO and tropical variability, please get in touch with the chapter co-leads (contact info is below). Before contacting us, please first check the list of current projects to see how you could:

    (1) Contribute to a current project;
    (2) Initiate a new one.
A detailed plan for the chapter is here. This plan is not (yet) set in stone, and we expect it to evolve subject to contributors' interests. Feedback and discussion are welcome.

The QBO/tropical variability chapter co-leads are James Anstey (anstey[AT]atm.ox.ac.uk) and Lesley Gray (GrayL[AT]physics.ox.ac.uk). Please feel free to contact us with questions.

The image below shows the QBO in monthly-mean zonal-mean zonal wind as measured by the radiosonde record compiled at Freie Universität Berlin (FUB). Red vertical lines and text indicate the names and locations of the sonde stations from which each portion of the data is taken. The grey region early in the record (1953-1955 above 15 hPa) indicates no data. Assimilation of tropical radiosonde data nudges the QBO in reanalysis models toward the state of the observed QBO, helping to overcome the difficulties such models have in simulating the QBO from first principles.

QBO chapter links
    Detailed plan of the QBO chapter
    People involved (i.e. current chapter contributors)
    Projects are listed in the chapter plan (section 5)
    QBO data
    Literature review (draft)

    QBO modelling and reanalysis workshop - 16-18 Mar 2015, Victoria, BC, Canada

External links
    S-RIP report outline
    S-RIP wiki
    Stratosphere-troposphere coupling chapter
    Current QBO conditions
    QBO review article by Baldwin et al. 2001
    SPARC reports

Latest update: 2 Mar 2015 by James Anstey