The Open Atmospheric Science Journal




ISSN: 1874-2823 ― Volume 13, 2019

Cold Winter Over North America: The Influence of the East Atlantic (EA) and the Tropical/Northern Hemisphere (TNH) Teleconnection Patterns



Masayo Ogi1, *, Søren Rysgaard1, 2, 3, David G. Barber1
1 Centre for Earth Observation Science, University of Manitoba, Winnipeg, Manitoba, Canada
2 Arctic Research Centre, Aarhus University, Aarhus, Denmark
3 Greenland Climate Research Centre, Greenland Institute of Natural Resources, Nuuk, Greenland

Abstract

Anomalous cold temperatures and strong cyclonic circulation were observed during winter 2013/14 over North America. In this article, we propose for the first time that positive East Atlantic (EA) and positive Tropical/Northern Hemisphere (TNH) patterns were dominant in the winter of 2013/14. The values of the EA and TNH indices for winter 2013/14 were the highest and the second highest for the period of record 1951-2014, respectively. The combined EA and TNH pattern is similar to the corresponding atmospheric circulation observed in the winter of 2013/14. The regression patterns of air temperatures on the EA and TNH index show negative anomalies over North America and the North Atlantic Ocean and positive anomalies over the North Pacific Ocean and the mid-latitude Atlantic Ocean. The regression pattern is similar to air temperature anomalies in winter 2013/14. In addition, the combined EA and TNH pattern correlates with sea surface temperature (SST) anomalies over the North Pacific and North Atlantic that are similar to the winter SST anomalies in winter 2013/14. The EA and TNH teleconnection patterns have contributed to the anomalous atmospheric circulation associated with the extreme cold winter over North America in 2013/14.

Keywords: Cold Winter in 2013/14, East Atlantic Pattern, Tropical/Northern Hemisphere Pattern, Sea Surface Temperature.


Article Information


Identifiers and Pagination:

Year: 2016
Volume: 10
First Page: 6
Last Page: 13
Publisher Id: TOASCJ-10-6
DOI: 10.2174/1874282301610010006

Article History:

Received Date: 31/05/2016
Revision Received Date: 6/07/2016
Acceptance Date: 29/07/2016
Electronic publication date: 31/08/2016
Collection year: 2016

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© Ogi et al.; Licensee Bentham Open

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.


* Address correspondence to this author at the Centre for Earth Observation Science, 530 Wallace Building, University of Manitoba, Winnipeg, MB R3T 2N2 Canada, Tel: (204) 474-9059; Fax: (204) 272-1532, E-mail: Masayo.Ogi@umanitoba.ca



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