The Influence of the QBO on Troposperic weather

[knocker]

Mention of the QBO is cropping up a fair bit of late which raises the question once again of the mechanism of the QBO and effects on Tropospheric weather. A couple of papers that may be of interest if one, like me,  is trying to get to grips with the subject' including the original one by Baldwin, et al. It is a very complex subject and research is ongoing

QBO.pdf

QBO.pdf

Edited July 26, 2023 by knocker

[knocker]

1 hour ago, knocker said:

Mention of the QBO is cropping up a fair bit of late which raises the question once again of the mechanism of the QBO and effects on Tropospheric weather. A couple of papers that may be of interest if one, like me,  is trying to get to grips with the subject' including the original one by Baldwin, et al. It is a very complex subject and research is ongoing

QBO.pdf

QBO.pdf

And a recent paper on the QBO

ABSTRACT
In the tropical stratosphere, deep layers of eastward and westward winds encircle the globe and descend regularly from the
upper stratosphere to the tropical tropopause. With a complete cycle typically lasting almost 2.5 years, this quasi-biennial
oscillation (QBO) is arguably the most predictable mode of atmospheric variability not linked to the changing seasons. The
QBO affects climate phenomena outside the tropical stratosphere, including ozone transport, the North Atlantic Oscillation
and Madden-Julian Oscillation, and its high predictability could enable better forecasts of these phenomena if models can
accurately represent the coupling processes. Climate and forecasting models are increasingly able to simulate stratospheric
oscillations resembling the QBO, but exhibit common systematic errors such as weak amplitude in the lowermost tropical
stratosphere. Uncertainties about the waves that force the oscillation, particularly the momentum fluxes from small-scale gravity
waves excited by deep convection, make its simulation challenging. Improved representation of processes governing the QBO
is expected to lead to better forecasts of the oscillation and its impacts, increased understanding of unusual events such as the
two QBO disruptions observed since 2016, and more reliable future projections of QBO behaviour under climate change.

The Quasi-Biennial Oscillation: Impacts, Processes, 1
and Projections 2
James A. Anstey1,10†, Scott M. Osprey2,3,10†, Joan Alexander4, Mark P. Baldwin5 3 , Neal
Butchart6, Lesley Gray2,3, Yoshio Kawatani7, Paul A. Newman8, and Jadwiga H. Richter9

QBO_review_2022_NREE_pre-proof.pdf