Just over two years <a href=" https://www.gtxgaming.co.uk/blog/otc-nexium-dose.pdf#warmth ">is nexium otc</a> The Antarctic, however, is a different story. There &ndash; in the present southern winter &ndash; sea ice is at record high levels. But at the same time the land-based Antarctic ice sheets are, overall, melting disconcertingly, suggesting that warming is at work there, too: in total, though regions vary, they have lost some 1,350 billion tons over the past two decades. So &ndash; when land and sea ice are added together &ndash; the Antarctic too has been melting. Meltwater from the land runs off into the sea, causing less mixing between warm and cold layers of the sea and thus encouraging ice to form.