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根据美国国家航空航天局(NASA)牵头的一项研究,北极去年冬季和今年春季出现了前所未有的地球臭氧保护层耗损。这是平流层极低温期反常延长造成的。该研究发表在《自然》杂志网络版。研究发现,北极2011年臭氧
According to a study led by NASA, there was an unprecedented loss of Earth’s ozone protective layer last winter and this spring. This is caused by an abnormal extension of the stratospheric cryogenic period. The study was published in the online edition of Nature magazine. Study Finds Arctic 2011 Ozone