New Scientist: Even the deepest, darkest reaches of the Antarctic abyss are feeling the heat, according to new results presented at the climate change congress in Copenhagen, Denmark, on Tuesday. Gregory Johnson, of the US National Oceanic and Atmospheric Agency, says even he was surprised by the findings. He says the changes could be responsible for up to 20% of the observed global sea-level rise. As part of the CLIVAR project, Johnson and a team of international colleagues have been …