What drove the dramatic retreat of arctic sea ice during summer 2007

@article{Zhang2008WhatDT,
  title={What drove the dramatic retreat of arctic sea ice during summer 2007},
  author={Jinlun Zhang and Ronald W. Lindsay and Michael Steele and Axel Schweiger},
  journal={Geophysical Research Letters},
  year={2008},
  volume={35}
}
[1] A model study has been conducted of the unprecedented retreat of arctic sea ice in the summer of 2007. It is found that preconditioning, anomalous winds, and ice-albedo feedback are mainly responsible for the retreat. Arctic sea ice in 2007 was preconditioned to radical changes after years of shrinking and thinning in a warm climate. During summer 2007 atmospheric changes strengthened the transpolar drift of sea ice, causing more ice to move out of the Pacific sector and the central Arctic… 

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