研究：南极上空臭氧空洞形状“异乎寻常”
<p>科学家们近日表示，今年南极上空臭氧空洞的形状“异乎寻常”，严重向南美倾斜。这表明，常见的极地漩涡发生重大扭曲。</p><p><span word="The">The</span> <span word="ozone">ozone</span> <span word="hole">hole</span> <span word="that">that</span> <span word="opens">opens</span> <span word="every">every</span> <span word="year">year</span> <span word="over">over</span> <span word="the">the</span> <span word="Antarctic">Antarctic</span> <span word="is">is</span> <span word="on">on</span> <span word="course">course</span> <span word="to">to</span> <span word="be">be</span> <span word="the">the</span> <span word="smallest">smallest</span> <span word="in">in</span> <span word="three">three</span> <span word="decades">decades</span>, <span word="scientists">scientists</span> <span word="have">have</span> <span word="said">said</span>.</p><p>科学家称，南极上空每年出现的臭氧空洞将是30年来最小的。</p><p><span word="Researchers">Researchers</span> <span word="say">say</span> <span word="the">the</span> <span word="hole">hole</span> <span word="is">is</span> <span word="also">also</span> <span word="a">a</span> <span word="particularly">particularly</span> <span word="unusual">unusual</span> <span word="shape">shape</span> <span word="this">this</span> <span word="year">year</span>, <span word="being">being</span> <span word="heavily">heavily</span> <span word="skewed">skewed</span> <span word="towards">towards</span> <span word="South">South</span> <span word="America">America</span> <span word="instead">instead</span> <span word="of">of</span> <span word="centring">centring</span> <span word="on">on</span> <span word="the">the</span> <span word="South">South</span> <span word="Pole">Pole</span>.</p><p>研究人员说，今年臭氧空洞的形状也特别不寻常，严重向南美洲倾斜，而不是以南极为中心。</p>
页:
[1]