Saturday, October 17, 2009
Reference: Arctic will be ice-free in 20 years, Bangkok Post, October 16, 2009
An alarm has been raised that the extreme extent of the summer melt of Arctic ice in 2007 was caused by carbon dioxide emissions and it portends that in 20 years global warming will leave the Arctic Ocean ice-free in the summer raising sea levels and harming wildlife (Arctic will be ice-free in 20 years, Bangkok Post, October 16, 2009). Kindly note that it is not possible for melting sea ice to raise the sea level and that the 2007 summer melt occurred during a time of global cooling and therefore it could not have been caused by global warming. In fact, the 2007 summer melt phenomenon was the result of shifting ocean currents that brought warm tropical waters further north than normal. A shift in ocean currents is a natural variability and is not caused by carbon dioxide emissions. In any case, the forecast based on 2007 data that the summer melt would leave less and less ice and that ice recovery in winter would progessively weaken in ensuing years has been proven false by 2008 and 2009 data. The mis-match between data and forecast is possibly the cause of the apparent state of confusion among warmists who have issued forecasts since 2007 that the Arctic would be ice free in summer by 2012, 2020, 2030, 2040, 2050, and 2100.