At http://phys.org/print294650860.html … in 2008 Norwegian scientists discovered Loki's Castle, a field of five active hydrothermal vents on the Mid Atlantic Ridge between Norway and Greenland. IN association with Loki's Castle are rich metal deposits – and a unique biology. In the seas west of Norway there are volcanoes and active earthquake zones, assumed to be part of the process of Plate Tectonics. Hydrothermal vents churn out hot water – at up to 360 degrees Celsius. No wonder climate scientists, and the Met Office people, think global warming is hiding in the oceans.