Climate change: Arctic 'greening' accelerates global warming in multiple ways - Professor Isla Myers-Smith
Each week, research seems to reveal accelerating impacts climate change . The Arctic is warming almost four times faster than the global average, with some locations such as Svalbard warming up to seven times faster. The region certainly lives up to its recently earned title of "climate change frontline." The Arctic Ocean is mostly covered by a layer of sea ice. But as the planet warms, it's decreasing, with about half of the sea ice area lost since 1981 and predictions of mostly ice-free Arctic summers by 2050. With less sea ice in summer, more of the ocean's surface is exposed, the reflective white surface dark and capturing the sun's heat. The same thing happens on land with longer periods without snow. The Arctic is covered with snow for most of the year, but every summer the snowy landscape turns green for a few weeks. That's when plants and animals kick in to carry out their life cycles. As temperatures rise, tundra ecosystems are in sharp transition. Plants "green up" earlier and there has been a significant increase in some species such as shrubs, tundra trees. (Isla Myers-Smith)