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TitreRecent melt rates of Canadian arctic ice caps are the highest in four millennia
AuteurFisher, D; Zheng, J; Burgess, D; Zdanowicz, C; Kinnard, C; Sharp, M; Bourgeois, J
SourceGlobal and Planetary Change 2011 p. 1-5, https://doi.org/10.1016/j.gloplacha.2011.06.005
Année2011
Séries alt.Secteur des sciences de la Terre, Contribution externe 20110143
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1016/j.gloplacha.2011.06.005
Mediapapier; en ligne; numérique
Formatspdf
ProvinceNunavut
SNRC26O; 48H; 39F; 340A
Lat/Long OENS-68.0000 -66.0000 68.0000 67.0000
Lat/Long OENS-84.0000 -80.0000 76.0000 75.0000
Lat/Long OENS-80.0000 -76.0000 79.0000 78.0000
Lat/Long OENS-80.0000 -72.0000 81.0000 80.0000
Sujetsclimat arctique; climat; glace fossile; épaisseurs des glaces; champs de glace; Calotte glaciaire de Devon ; Calotte glaciaire de Penny ; Changement climatique; géologie des dépôts meubles/géomorphologie; géologie de l'environnement
Illustrationslocation maps; photographs; graphs; plots; histograms
ProgrammeÉtudes paléo-environnementales sur les changements climatiques, Géosciences de changements climatiques
Résumé(disponible en anglais seulement)
There has been a rapid acceleration in ice-cap melt rates over the last few decades across the entire Canadian Arctic. Present melt rates exceed the past rates for many millennia. New shallow cores at old sites bring their melt series up-to-date. The melt-percentage series from the Devon Island and Agassiz (Ellesmere Island) ice caps are well correlated with the Devon net mass balance and show a large increase in melt since the middle 1990s. Arctic ice core melt series (latitude range of 67 to 81 N) show the last quarter century has had the highest melt in two millennia and The Holocene-long Agassiz melt record shows that the last 25 years has the highest melt in 4200 years. The Agassiz melt rates since the middle 1990s resemble those of the early Holocene thermal maximum over 9000 years ago.
GEOSCAN ID289117