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(单词翻译)
If you've ever driven up to a mountain pass, you know that the higher you climb, the colder it gets. But on clear, calm days, it can actually (be) colder in the valleys. That's because under high-pressure systems, cold air slides down mountain slopes and pools down below. In the Oregon Cascades1, ridgeline temperatures have clocked in at 27 degrees Fahrenheit2 warmer than those in a valley 2,600 feet below.
So what happens when you take this variability and subject it to climate change? Well, a moderate estimate from the IPCC says western Oregon could warm 5 degrees Fahrenheit over the next century. But that's probably more accurate for the valleys—ridgetop temperatures could rise as much as 14 degrees, according to research in the International Journal of Climatology.
Oregon is projected to have more high-pressure days as the climate changes. That means more cold air pooling in the valleys and more extreme temperature differences, which could disrupt the local ecosystem3.
We tend to think of climate change as a global or regional phenomenon. But, as this research suggests, you have to also think locally.
Thanks for the minute for Scientific American's 60-Second Science. I'm Christopher Intagliata.
1 cascades | |
倾泻( cascade的名词复数 ); 小瀑布(尤指一连串瀑布中的一支); 瀑布状物; 倾泻(或涌出)的东西 | |
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2 Fahrenheit | |
n./adj.华氏温度;华氏温度计(的) | |
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3 ecosystem | |
n.生态系统 | |
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