A cloudier Arctic expected with diminishing sea ice

  • Liu Y
  • Key J
  • Liu Z
 et al. 
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Arctic sea ice cover has decreased dramatically over the last three
decades. Global climate models under-predicted this decline, most
likely a result of the misrepresentation of one or more processes
that influence sea ice. The cloud feedback is the primary source
of uncertainty in model simulations, especially in the polar regions.
A better understanding of the interaction between sea ice and clouds,
and specifically the impact of decreased sea ice on cloud cover,
will provide valuable insight into the Arctic climate system and
may ultimately help in improving climate model parameterizations.
In this study, an equilibrium feedback assessment is employed to
quantify the relationship between changes in sea ice and clouds,
using satellite-derived sea ice concentration and cloud cover over
the period 2000–2010. Results show that a 1% decrease in sea
ice concentration leads to a 0.36–0.47% increase in cloud cover,
suggesting that a further decline in sea ice cover will result in
an even cloudier Arctic.

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  • Yinghui Liu

  • Jeffrey R. Key

  • Zhengyu Liu

  • Xuanji Wang

  • Stephen J. Vavrus

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