When will the summer Arctic be nearly sea ice free?

@article{Overland2013WhenWT,
  title={When will the summer Arctic be nearly sea ice free?},
  author={James E. Overland and Muyin Wang},
  journal={Geophysical Research Letters},
  year={2013},
  volume={40}
}
The observed rapid loss of thick multiyear sea ice over the last 7 years and the September 2012 Arctic sea ice extent reduction of 49% relative to the 1979–2000 climatology are inconsistent with projections of a nearly sea ice‐free summer Arctic from model estimates of 2070 and beyond made just a few years ago. Three recent approaches to predictions in the scientific literature are as follows: (1) extrapolation of sea ice volume data, (2) assuming several more rapid loss events such as 2007 and… 

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References

SHOWING 1-10 OF 38 REFERENCES

A sea ice free summer Arctic within 30 years?

September 2008 followed 2007 as the second sequential year with an extreme summer Arctic sea ice extent minimum. Although such a sea ice loss was not indicated until much later in the century in the

A sea ice free summer Arctic within 30 years: An update from CMIP5 models

Three years ago we proposed that the summer Arctic would be nearly sea ice free by the 2030s; “nearly” is interpreted as sea ice extent less than 1.0 million km2. We consider this estimate to be

Constraining projections of summer Arctic sea ice

We examine the recent (1979–2010) and future (2011–2100) characteristics of the summer Arctic sea-ice cover as simulated by 37 Earth system and general circulation models from the Coupled Model

Trends in Arctic sea ice extent from CMIP5, CMIP3 and observations

The rapid retreat and thinning of the Arctic sea ice cover over the past several decades is one of the most striking manifestations of global climate change. Previous research revealed that the

CryoSat‐2 estimates of Arctic sea ice thickness and volume

Satellite records show a decline in ice extent over more than three decades, with a record minimum in September 2012. Results from the Pan‐Arctic Ice‐Ocean Modelling and Assimilation system (PIOMAS)

Recovery mechanisms of Arctic summer sea ice

We examine the recovery of Arctic sea ice from prescribed ice‐free summer conditions in simulations of 21st century climate in an atmosphere–ocean general circulation model. We find that ice extent

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

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

The reversibility of sea ice loss in a state‐of‐the‐art climate model

Rapid Arctic sea ice retreat has fueled speculation about the possibility of threshold (or ‘tipping point’) behavior and irreversible loss of the sea ice cover. We test sea ice reversibility within a

Inter‐annual to multi‐decadal Arctic sea ice extent trends in a warming world

A climate model (CCSM4) is used to investigate the influence of anthropogenic forcing on late 20th century and early 21st century Arctic sea ice extent trends. On all timescales examined (2–50+

The Future of Arctic Sea Ice

Arctic sea ice is a key indicator of the state of global climate because of both its sensitivity to warming and its role in amplifying climate change. Accelerated melting of the perennial sea ice