Accessibility navigation


ENSO modulation of MJO teleconnections to the north Atlantic & Europe

Lee, R. W., Woolnough, S. J., Charlton-Perez, A. J. and Vitart, F. (2019) ENSO modulation of MJO teleconnections to the north Atlantic & Europe. Geophysical Research Letters. ISSN 0094-8276

[img]
Preview
Text (Open access) - Published Version
· Available under License Creative Commons Attribution.
· Please see our End User Agreement before downloading.

8MB
[img] Text - Accepted Version
· Restricted to Repository staff only

9MB
[img] Text - Supplemental Material
· Restricted to Repository staff only

199kB

It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing.

To link to this item DOI: 10.1029/2019GL084683

Abstract/Summary

The teleconnection from the Madden-Julian Oscillation (MJO) provides a source of subseasonal variability and predictability to the North Atlantic-European (NAE) region. The El Niño-Southern Oscillation (ENSO) modulates the seasonal mean state, through which the MJO and its teleconnection pattern propagates; however, its impact on this teleconnection to the NAE region has not been investigated. Here we find a robust dependence of the teleconnections from the MJO to NAE weather regimes on the phase of ENSO. We show that the MJO to NAO+ regime tropospheric teleconnection is strongly enhanced during El Niño years, via enhanced Rossby wave activity, and suppressed during La Niña. Conversely the MJO to NAO− regime stratospheric teleconnection is enhanced during La Niña years, and suppressed during El Niño. This dependence on the background state has strong implications for subseasonal predictability, including interannual variations in subseasonal predictive skill.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Mathematical, Physical and Computational Sciences > NCAS
Faculty of Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:87077
Uncontrolled Keywords:subseasonal teleconnections MJO ENSO weather regimes eddy-driven jet Rossby wave
Publisher:American Geophysical Union

Downloads

Downloads per month over past year

University Staff: Request a correction | Centaur Editors: Update this record

Page navigation