Dynamical mechanisms of Arctic amplification. Issue 1 (12th May 2018)

• Record Type: Journal Article
• Authors: Dethloff, Klaus; Handorf, Dörthe; Jaiser, Ralf; Rinke, Annette; Klinghammer, Pia
• Other Names: Gimeno Luis guestEditor.
• Is Part Of: Annals of the New York Academy of Sciences. Volume 1436:Issue 1(2019)
• Page Start: 184
• Page End: 194
• Publication Date: 2018-05-12
• Subjects: Arctic sea‐ice changes -- Arctic–mid‐latitude linkages -- Arctic Oscillation -- Scandinavian High -- stratospheric polar vortex; Medical sciences -- Periodicals; Medicine -- Periodicals; Science -- Periodicals; 610
• DOI: 10.1111/nyas.13698
• Languages: English
• ISSNs: 0077-8923

Abstract

Abstract: The Arctic has become a hot spot of climate change, but the nonlinear interactions between regional and global scales in the coupled climate system responsible for Arctic amplification are not well understood and insufficiently described in climate models. Here, we compare reanalysis data with model simulations for low and high Arctic sea ice conditions to identify model biases with respect to atmospheric Arctic–mid‐latitude linkages. We show that an appropriate description of Arctic sea ice forcing is able to reproduce the observed winter cooling in mid‐latitudes as result of improved tropospheric‐stratospheric planetary wave propagation triggering a negative phase of the Arctic Oscillation/North Atlantic Oscillation in late winter. Abstract : The Arctic has become a hot spot of climate change, but the nonlinear interactions between regional and global scales in the coupled climate system responsible for Arctic amplification are not well understood and insufficiently described in climate models. Here we compare re‐analysis data with model simulations for low and high Arctic sea ice conditions to identify model biases with respect to atmospheric Arctic‐mid‐latitude linkages.