Climatic and atmospheric teleconnection indices and western Arctic sea ice variability

Auteur(s) et Affiliation(s)

BALLINGER, T.J.

Dept. of Geography , State Univ., Kent, Etats-Unis

ROGERS, J.C.

Geography and Atmospheric Sciences Program, The Ohio State Univ., Colombus, Etats-Unis

Description :
This paper examines the sea ice cover minima in the western Arctic in the context of several climatic mechanisms known to impact its variability. The AA. evaluate the role of atmospheric and oceanic teleconnections, as well as Northern Hemisphere surface air temperatures (NHT) on the latitude of September sea ice decline in the Beaufort and Chukchi Seas over the period 1953-2010. Indices of seasonal atmospheric and oceanic teleconnections and annual mean Northern Hemisphere temperatures (NHT) and CO2 concentration are orthogonalized using rotated principal component analysis, forming predictors regressed onto the sea ice latitude data at each longitude using stepwise multiple linear regression. With the exception of the three easternmost longitudes (136-126° W), the teleconnections and NHTs explain over 50% of the regional ice edge variance. Increases in both NHTs and ice retreat since the mid-1990s account for the large explained variances observed in regression analyses extending into recent years.

Type de document :
Article de périodique

Source :
Physical geography, issn : 0272-3646, 2014, vol. 35, n°. 6, p. 459-477, nombre de pages : 19, Références bibliographiques : 2 p.

Date :
2014

Editeur :
Pays édition : Royaume-Uni, Abingdon, Taylor and Francis

Langue :
Anglais