Wiedermann, MarcDonges, Jonathan F.Handorf, DörtheKurths, JürgenDonner, Reik V.2016-08-052016-08-052015-06-18Wiedermann , M , Donges , J F , Handorf , D , Kurths , J & Donner , R V 2015 , ' Hierarchical structures in Northern Hemispheric extratropical winter ocean-atmosphere interactions ' arXiv .PURE: 57966551PURE UUID: ef2b0ccb-9d1f-44a9-9e55-58b00b7cd394ArXiv: http://arxiv.org/abs/1506.06634v1http://hdl.handle.net/2164/6554Acknowledgements MW and RVD have been supported by the German Federal Ministry for Education and Research via the BMBF Young Investigators Group CoSy-CC2 (grant 18 Marc Wiedermann et al. no. 01LN1306A). JFD thanks the Stordalen Foundation and BMBF (project GLUES) for financial support. JK acknowledges the IRTG 1740 funded by DFG and FAPESP. Coupled climate network analysis has been performed using the Python package pyunicorn (Donges et al, 2015a) that is available at https://github.com/pik-copan/pyunicorn.engphysics.ao-phphysics.data-anJournal article