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。
The ozone hole that opens every year over the Antarctic is on course to be the smallest in three decades, scientists have said.
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。
Researchers say the hole is also a particularly unusual shape this year, being heavily skewed towards South America instead of centring on the South Pole.
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。
The rare shape – never before observed – indicates a significant distortion to the usual polar vortex, which maintains low temperatures in the stratosphere.
这一罕见的异常形状表明,常见的极地漩涡发生巨大的扭曲。极涡维持着平流层的低温。
vortex [ˈvɔːteks]:n.涡流;漩涡
stratosphere[ˈstrætəsfɪə(r)]:n.同温层
The hole is currently well under half the area that usually opens up by mid-September, and may have already reached its maximum size, a little smaller in area than the Antarctic continent.
目前,臭氧空洞的面积小于通常情况下9月中旬面积的一半,而且可能已经达到最大尺寸,比南极大陆的面积还要小一点。
【研究:南极上空臭氧空洞形状“异乎寻常”】相关文章:
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