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사범대학
과학교육과
Journal papers
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The Lack of a QBO-MJO Connection in Climate Models With a Nudged Stratosphere
Title
The Lack of a QBO-MJO Connection in Climate Models With a Nudged Stratosphere
Authors
Martin Z.K.
;
Simpson I.R.
;
Lin P.
;
Orbe C.
;
Tang Q.
;
Caron J.M.
;
Chen C.-C.
;
Kim H.
;
Leung L.R.
;
Richter J.H.
;
Xie S.
Ewha Authors
김혜미
SCOPUS Author ID
김혜미
Issue Date
2023
Journal Title
Journal of Geophysical Research: Atmospheres
ISSN
2169-897X
Citation
Journal of Geophysical Research: Atmospheres vol. 128, no. 17
Keywords
climate models
;
Madden-Julian oscillation
;
nudged simulations
;
quasi-biennial oscillation
Publisher
John Wiley and Sons Inc
Indexed
SCIE; SCOPUS
Document Type
Article
Abstract
The observed stratospheric quasi-biennial oscillation (QBO) and the tropospheric Madden-Julian oscillation (MJO) are strongly connected in boreal winter, with stronger MJO activity when lower-stratospheric winds are easterly. However, the current generation of climate models with internally generated representations of the QBO and MJO do not simulate the observed QBO-MJO connection, for reasons that remain unclear. This study builds on prior work exploring the QBO-MJO link in climate models whose stratospheric winds are relaxed toward reanalysis, reducing stratospheric biases in the model and imposing a realistic QBO. A series of ensemble experiments are performed using four state-of-the-art climate models capable of representing the MJO over the period 1980–2015, each with similar nudging in the stratosphere. In these four models, nudging leads to a good representation of QBO wind and temperature signals, however no model simulates the observed QBO-MJO relationship. Biases in MJO vertical structure and cloud-radiative feedbacks are investigated, but no conclusive model bias or mechanism is identified that explains the lack of a QBO-MJO connection. © 2023 American Geophysical Union. All Rights Reserved. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.
DOI
10.1029/2023JD038722
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