However, even slight changes in the meteorology of the region this month could affect the rate of depletion of ozone and how large an area the ozone hole might span.

即使这一地区在本月之内出现任何的天气变化都有可能影响臭氧含量的变动，并决定臭氧空洞将扩大多少。

youdao

Taken together, the two observed that circulation changes accounted for "virtually all" of the year-to-year changes in springtime Antarctic ozone, Salby and colleagues write.

综上，环流变化解释了春季发生在南极臭氧层的所有年际变化，Salby及其同事们写道。

youdao

Subtracting their estimate of the natural changes in ozone from actual changes, the group finds “a clear upward trend since the late 1990s” in the hole's ozone that represents “a systematic rebound.”

从臭氧层的实际变化中除去正常情况下臭氧层的变化（对照），这个研究团队发现“自20世纪90年代以来臭氧层空洞缩小趋势”有一个系统性的机制。

youdao

If you weighed the changes in ozone by the population distribution of the U.S., you get a net increase in the death rate and hospitalization rate due to ethanol.

NPR: Study Says Ethanol Pollution Could Rival Gas

During the dinosaurs' time on Earth, "the atmosphere became charged with methane, which finally damaged the ozone layer and brought about great changes in the vegetation, " it added.

BBC: Ill wind 'killed dinosaurs'

Changes in the amount of ultraviolet radiation from the Sun affect the ozone layer.

BBC: Viewpoint: The Sun and climate change