回复: 一组全球气候变暖的最新图片
Photo Gallery: Arctic Climate Change
A forest of dead spruce trees near Homer, Alaska, is the victim of a tiny beetle that has boomed in the state's milder winters. Since the mid-1970s, about 50 percent, or 1 million acres (400,000 hectares), of the Kenai Peninsula's adult spruce trees have succumbed to the spruce bark beetle. The swaths of downed trees may actually turn forests from carbon sinks to sources, according to an April 2008 study. For instance, when dead trees decompose, they release the greenhouse gas carbon dioxide into the atmosphere.
意译：北极气候变化图片。森林的死亡――“云杉树林”靠近的荷马，阿拉斯加，是受害者的一小甲虫已经蓬勃发展中的国家的暖冬。 自1970年代中期以来，约50％，或1百万英亩（40万公顷）的基奈半岛的成熟的云杉树屈服于云杉树皮甲虫。大片的树木击落实际上可能反过来森林碳下沉来源，根据2008年4月的研究。例如，当树木死亡腐烂分解，它们释放的二氧化碳排放到大气层。
