Authors: K K Andersen; N Azuma; J-M Barnola; M Bigler; P Biscaye; N Caillon; J Chappellaz; H B Clausen; D Dahl-Jensen; H Fischer; J Flückiger; D Fritzsche; Y Fujii; K Goto-Azuma; K Grønvold; N S Gundestrup; M Hansson; C Huber; C S Hvidberg; S J Johnsen; U Jonsell; J Jouzel; S Kipfstuhl; A Landais; M Leuenberger; R Lorrain; V Masson-Delmotte; H Miller; H Motoyama; H Narita; T Popp; S O Rasmussen; D Raynaud; R Rothlisberger; U Ruth; D Samyn; J Schwander; H Shoji; M-L Siggard-Andersen; J P Steffensen; T Stocker; A E Sveinbjörnsdóttir; A Svensson; M Takata; J-L Tison; Th Thorsteinsson; O Watanabe; F Wilhelms; J W C White Journal: Nature Date: 2004-09-09 Impact factor: 49.962