January 1, 2015 Journal article Open Access

Scafetta, Nicola; Mazzarella, Adriano

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  <dc:creator>Scafetta, Nicola</dc:creator>
  <dc:creator>Mazzarella, Adriano</dc:creator>
  <dc:date>2015-01-01</dc:date>
  <dc:description>Here we study the Arctic and Antarctic sea-ice area records provided by the National Snow and Ice Data Center (NSIDC). These records reveal an opposite climatic behavior: since 1978 the Arctic sea-ice area index decreased, that is, the region has warmed, while the Antarctic sea-ice area index increased, that is, the region has cooled. During the last 7 years the Arctic sea-ice area has stabilized while the Antarctic sea-ice area has increased at a rate significantly higher than during the previous decades; that is, the sea-ice area of both regions has experienced a positive acceleration. This result is quite robust because it is confirmed by alternative temperature climate indices of the same regions. We also found that a significant 4-5-year natural oscillation characterizes the climate of these sea-ice polar areas. On the contrary, we found that the CMIP5 general circulation models have predicted significant warming in both polar sea regions and failed to reproduce the strong 4-5-year oscillation. Because the CMIP5 GCM simulations are inconsistent with the observations, we suggest that important natural mechanisms of climate change are missing in the models.</dc:description>
  <dc:identifier>https://www.openaccessrepository.it/record/48764</dc:identifier>
  <dc:identifier>10.1155/2015/481834</dc:identifier>
  <dc:language>eng</dc:language>
  <dc:relation>url:https://www.openaccessrepository.it/communities/itmirror</dc:relation>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>http://www.opendefinition.org/licenses/cc-by</dc:rights>
  <dc:title>The Arctic and Antarctic Sea-Ice Area Index Records versus Measured and Modeled Temperature Data</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
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