Environmental News Network: Pine Island Glacier, located in West Antarctica, is showing signs of thinning making it more susceptible to climatic and ocean variability than at first thought. Scientists led by the British Antarctic Survey have discovered large fluctuations in the ocean heat manifesting itself in the melting of the ice shelf into which the glacier flows. Between 2010 and 2012 the ice shelf into which the ice stream flows has decreased by 50%, most likely due to La Nin, suggesting a complex interplay between geological,...