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An unexpected disruption of the atmospheric quasi-biennial oscillation

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Title: An unexpected disruption of the atmospheric quasi-biennial oscillation
Authors: Osprey, Scott M.
Butchart, Neal
Knight, Jeff R.
Scaife, Adam A.
Hamilton, Kevin
show 3 moreAnstey, James A.
Schenzinger, Verena
Zhang, Chunxi

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Issue Date: 23 Sep 2016
Publisher: Science
Citation: Osprey, S, Butchart, N, Knight, JR et al., (2016). An unexpected disruption of the atmospheric quasi-biennial oscillation. Science, 353 (6306), 1424-1427.
Related To: http://science.sciencemag.org/content/353/6306/1424.full
Abstract: One of the most repeatable phenomena seen in the atmosphere, the quasi-biennial oscillation (QBO) between prevailing eastward and westward wind jets in the equatorial stratosphere (approximately 16 to 50 kilometers altitude), was unexpectedly disrupted in February 2016. An unprecedented westward jet formed within the eastward phase in the lower stratosphere and cannot be accounted for by the standard QBO paradigm based on vertical momentum transport. Instead, the primary cause was waves transporting momentum from the Northern Hemisphere. Seasonal forecasts did not predict the disruption, but analogous QBO disruptions are seen very occasionally in some climate simulations. A return to more typical QBO behavior within the next year is forecast, although the possibility of more frequent occurrences of similar disruptions is projected for a warming climate.
Pages/Duration: 10 pages
URI/DOI: http://hdl.handle.net/10125/43740
DOI: 10.1126/science.aah4156
Appears in Collections:SOEST Faculty & Researcher Works



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