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Skinner, Daniel T. 
ORCID: https://orcid.org/0000-0002-0086-5958, Matthews, Adrian J. ORCID: https://orcid.org/0000-0003-0492-1168 and Stevens, David P. ORCID: https://orcid.org/0000-0002-7283-4405
(2023)
Decadal variability of the extratropical response to the Madden-Julian Oscillation.
Geophysical Research Letters, 50 (17).
ISSN 0094-8276
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Abstract
The Madden–Julian Oscillation (MJO) is the leading mode of sub-seasonal variability in the tropical atmosphere and is a source of predictability for extratropical weather through its teleconnections. MJO teleconnection patterns can be modulated by the El Niño–Southern Oscillation (ENSO) on seasonal to interannual time scales. However, changes over decadal time scales are less well understood. ERA5 reanalysis data are used to show that the boreal winter MJO teleconnection pattern in the Northern Hemisphere has changed in recent decades in line with changes in the Pacific Decadal Oscillation and Atlantic Multidecadal Variability. Changes are seen in the circulation, temperature and precipitation responses. In particular, from 1997, intraseasonal cold anomalies appear over Europe and the eastern United States due to MJO convection over the western Pacific; these were not present 20 years previously. The decadal variability observed is not the product of aliasing of ENSO modulation of the teleconnection.
| Item Type: | Article |
|---|---|
| Additional Information: | Research Funding: Natural Environment Research Council. Grant Number: NE/R016704/1 Data Availability Statement: All data used in the preparation of this manuscript are publicly available. ERA5 wind, geopotential and temperature data were provided by the Copernicus Climate Data Store (Copernicus Climate Change Service, 2023a, 2023b; Hersbach et al., 2020). HadISST SST data were provided by the Met Office Hadley Centre (Rayner et al., 2003; UK Met Office, 2022). The MJO index was accessed from the Australian Bureau of Meteorology (2021) and Nino 3.4 index from the US National Oceanic and Atmospheric Administration Earth System Research Laboratories (2022). The AMV index data were provided by the Climate Analysis Section, NCAR (Trenberth & Shea, 2006). The PDO index data were provided by the National Centers for Environmental Information, NOAA (Mantua, 1999, 2023). The NAO index data were provided by the National Oceanic and Atmospheric Administration Earth System Research Laboratories (2023). CMAP precipitation data (Xie & Arkin, 1997) were provided by the NOAA PSL. |
| Faculty \ School: | Faculty of Science > School of Mathematics Faculty of Science > School of Natural Sciences Faculty of Science > School of Environmental Sciences University of East Anglia Research Groups/Centres > Theme - ClimateUEA |
| UEA Research Groups: | Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences Faculty of Science > Research Groups > Fluid and Solid Mechanics Faculty of Science > Research Groups > Climatic Research Unit |
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| Depositing User: | LivePure Connector |
| Date Deposited: | 04 Sep 2023 11:30 |
| Last Modified: | 07 Oct 2023 01:21 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/92977 |
| DOI: | 10.1029/2023GL104576 |
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