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TitreA changing Arctic seasonal ice zone: Observations from 1870-2003 and possible oceanographic consequences
AuteurKinnard, C; Zdanowicz, C M; Koerner, R M; Fisher, D A
SourceGeophysical Research Letters vol. 35, no. 2, L02507, 2008, 5 pages, (Accès ouvert)
Séries alt.Secteur des sciences de la Terre, Contribution externe 20080603
Documentpublication en série
Mediapapier; en ligne; numérique
ProvinceRégion extracotière du nord
Lat/Long OENS-180.0000 180.0000 90.0000 60.0000
Sujetsglace; épaisseur de la glace; glace marine; glace massive; effets sur l'environnement; etudes de l'environnement; analyse environnementales; climat arctique; climatologie; fluctuations climatiques; climat; géologie de l'environnement; géologie marine
Illustrationslocation maps; graphs
Diffusé2008 01 29
Résumé(disponible en anglais seulement)
Changes in the extent of seasonal ice were investigated using historical and satellite observations for the period 1870–2003. The seasonal ice zone (SIZ) has been gradually expanding since 1870, with a marked acceleration over the past three decades, and has migrated north to encompass all peripheral Arctic seas. The expansion of the SIZ may be increasing the salinity of the upper Arctic Ocean, consistent with recent observations. The migration of the SIZ over continental shelves may also be enhancing the formation rate and salinity of Arctic deep waters, which are subsequently advected to the convective region of the Greenland-Iceland-Norwegian Sea, thereby influencing the formation of North Atlantic deep waters and related global thermohaline circulation.