TY  - JOUR
A1  - Anstey, James A.
A1  - Simpson, Isla R.
A1  - Richter, Jadwiga H.
A1  - Naoe, Hiroaki
A1  - Taguchi, Masakazu
A1  - Serva, Federico
A1  - Gray, Lesley J.
A1  - Butchart, Neal
A1  - Hamilton, Kevin
A1  - Osprey, Scott
A1  - Bellprat, Omar
A1  - Braesicke, Peter
A1  - Bushell, Andrew C.
A1  - Cagnazzo, Chiara
A1  - Chen, Chih-Chieh
A1  - Chun, Hye-Yeong
A1  - Garcia, Rolando R.
A1  - Holt, Laura
A1  - Kawatani, Yoshio
A1  - Kerzenmacher, Tobias
A1  - Kim, Young-Ha
A1  - Lott, Francois
A1  - McLandress, C.
A1  - Scinocca, John
A1  - Stockdale, Timothy N.
A1  - Versick, Stefan
A1  - Watanabe, Shingo
A1  - Yoshida, Kohei
A1  - Yukimoto, Seiji
T1  - Teleconnections of the Quasi-Biennial Oscillation in a multi-model ensemble of QBO-resolving models
T2  - Quarterly journal of the Royal Meteorological Society
N2  - The Quasi-biennial Oscillation (QBO) dominates the interannual variability of the tropical stratosphere and influences other regions of the atmosphere. The high predictability of the QBO implies that its teleconnections could lead to increased skill of seasonal and decadal forecasts provided the relevant mechanisms are accurately represented in models. Here modelling and sampling uncertainties of QBO teleconnections are examined using a multi-model ensemble of QBO-resolving atmospheric general circulation models that have carried out a set of coordinated experiments as part of the Stratosphere-troposphere Processes And their Role in Climate (SPARC) QBO initiative (QBOi). During Northern Hemisphere winter, the stratospheric polar vortex in most of these models strengthens when the QBO near 50 hPa is westerly and weakens when it is easterly, consistent with, but weaker than, the observed response. These weak responses are likely due to model errors, such as systematically weak QBO amplitudes near 50 hPa, affecting the teleconnection. The teleconnection to the North Atlantic Oscillation is less well captured overall, but of similar strength to the observed signal in the few models that do show it. The models do not show clear evidence of a QBO teleconnection to the Northern Hemisphere Pacific-sector subtropical jet.
KW  - North Atlantic Oscillation
KW  - polar vortex
KW  - Quasi-Biennial Oscillation
KW  - seasonal forecasting
KW  - stratosphere
KW  - stratosphere–troposphere coupling
KW  - teleconnection
Y1  - 2021
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/72088
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-720887
SN  - 1477-870X
N1  - This work was supported by the National Center for Atmospheric Research, which is a major facility sponsored by the National Science Foundation under Cooperative Agreement no. 1852977. Portions of this study were supported by the Regional and Global Model Analysis (RGMA) component of the Earth and Environmental System Modeling Program of the U.S. Department of Energy's Office of Biological & Environmental Research (BER) via National Science Foundation IA 1844590.
VL  - 148
IS  - 744
SP  - 1568
EP  - 1592
PB  - Wiley
CY  - Weinheim [u.a.]
ER  -