Posts Tagged ‘Conspiracy’

Arctic vs Antarctic Ice

September 20, 2012

Joanne Nova suggests newspapers are being biased by not covering the “almost new record” of Antarctic sea ice and instead seem to be more preoccupied with how the Arctic has lost 50% of its summer sea ice.

In her haste to claim wrongdoing she forgets a number of key facts.

  • The current Antarctic sea ice anomaly is only 60% of the one recorded in 2007, so it’s not a record.
  • Even if the increase continued for this year, and it became a new record, it is not part of a dramatic trend unlike the Arctic situation.
  • The extra 7% of Antarctic sea ice area, does not offset the 50% loss of Artic ice. Globally the trend is downward.
  • The Antarctic ice is thinner; having slightly more thinner ice is no substitute for the loss of thick multi-year Arctic ice.
  • The Antarctic ice cannot be feasibly moved to the northern hemisphere so it’s no help to the polar animals that depend upon the ice.
  • The causes for sea ice increase may well be explained by a number of factors.
  • The Antarctic (not just sea ice) is continuing to lose mass.
  • From a feedback mechanism point of view (less ice means more sun enters the water rather than being reflected) the increase in ice during winter does not have as much impact on the feedback as loos of ice during summer because it occurs at a time when there is less direct sunlight.
  • The small increase in Antarctic sea ice is not sucking methane back in.

The difference in sea ice of the Artic vs Antarctic is explained well on the nsidc.org website. Nova should read more and write less – but that might interfere with her scare campaign.

Perhaps Nova prefers video?