Persistent anomalies of the extratropical Northern Hemisphere wintertime circulation as an initiator of El Niño/Southern Oscillation events
| dc.citation.articleNumber | 10145 | |
| dc.citation.journalTitle | Scientific Reports | |
| dc.citation.volumeNumber | 7 | |
| dc.contributor.author | Anderson, Bruce T. | |
| dc.contributor.author | Hassanzadeh, Pedram | |
| dc.contributor.author | Caballero, Rodrigo | |
| dc.date.accessioned | 2017-11-06T21:15:05Z | |
| dc.date.available | 2017-11-06T21:15:05Z | |
| dc.date.issued | 2017 | |
| dc.description.abstract | Climates across both hemispheres are strongly influenced by tropical Pacific variability associated with the El Niño/Southern Oscillation (ENSO). Conversely, extratropical variability also can affect the tropics. In particular, seasonal-mean alterations of near-surface winds associated with the North Pacific Oscillation (NPO) serve as a significant extratropical forcing agent of ENSO. However, it is still unclear what dynamical processes give rise to year-to-year shifts in these long-lived NPO anomalies. Here we show that intraseasonal variability in boreal winter pressure patterns over the Central North Pacific (CNP) imparts a significant signature upon the seasonal-mean circulations characteristic of the NPO. Further we show that the seasonal-mean signature results in part from year-to-year variations in persistent, quasi-stationary low-pressure intrusions into the subtropics of the CNP, accompanied by the establishment of persistent, quasi-stationary high-pressure anomalies over high latitudes of the CNP. Overall, we find that the frequency of these persistent extratropical anomalies (PEAs) during a given winter serves as a key modulator of intraseasonal variability in extratropical North Pacific circulations and, through their influence on the seasonal-mean circulations in and around the southern lobe of the NPO, the state of the equatorial Pacific 9–12 months later. | |
| dc.identifier.citation | Anderson, Bruce T., Hassanzadeh, Pedram and Caballero, Rodrigo. "Persistent anomalies of the extratropical Northern Hemisphere wintertime circulation as an initiator of El Niño/Southern Oscillation events." <i>Scientific Reports,</i> 7, (2017) Springer Nature: https://doi.org/10.1038/s41598-017-09580-9. | |
| dc.identifier.digital | PersistentAnomalies | |
| dc.identifier.doi | https://doi.org/10.1038/s41598-017-09580-9 | |
| dc.identifier.uri | https://hdl.handle.net/1911/97832 | |
| dc.language.iso | eng | |
| dc.publisher | Springer Nature | |
| dc.rights | This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. | |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
| dc.title | Persistent anomalies of the extratropical Northern Hemisphere wintertime circulation as an initiator of El Niño/Southern Oscillation events | |
| dc.type | Journal article | |
| dc.type.dcmi | Text | |
| dc.type.publication | publisher version |
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