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Mountain versus Valley Temps Stretch Apart with Climate Change

環(huán)境保護(hù)也要著眼本地

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 Cascades, ridgeline temperatures have clocked in at 27 degrees Fahrenheit warmer than those in a valley 2,600 feet below.

如果你曾經(jīng)開(kāi)車爬過(guò)山路,就會(huì)知道爬得越高氣溫越低。但實(shí)際上,在晴朗寧?kù)o的日子里,山谷中的溫度更低。那是因?yàn)樵诟邏合到y(tǒng)下,冷空氣沿山坡下降,并于地勢(shì)低處聚集。俄勒岡州的喀斯喀特山脈,其山谷比山脊低2600英尺,而所記錄的溫度顯示,山谷比山脊的溫度低了華氏27度。

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 Fahrenheit, according to research in the International Journal of Climatology.

因此,當(dāng)你明白了這種溫差,而它又遭遇了氣候變化的時(shí)候,會(huì)怎樣呢?聯(lián)合國(guó)政府間氣候變化專門委員會(huì)對(duì)此作出適當(dāng)推測(cè),他們認(rèn)為,到下個(gè)世紀(jì),俄勒岡州西部的溫度會(huì)升高華氏5度。不過(guò),根據(jù)《國(guó)際氣候?qū)W雜志》上發(fā)表的研究,這一數(shù)據(jù)對(duì)于山谷可能更精確,因?yàn)榧鬼數(shù)臏囟瓤赡軙?huì)升高華氏14度。

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 ecosystem.

隨著氣候變化,俄勒岡州將會(huì)有更多的高壓天氣。這意味著更多的冷空氣會(huì)聚集在山谷,并導(dǎo)致更為極端的溫度差異,從而破壞當(dāng)?shù)氐纳鷳B(tài)系統(tǒng)。

We tend to think of climate change as a global or regional phenomenon. But, as this research suggests, you have to also think locally.

我們常常認(rèn)為氣候變化是全球性或區(qū)域性現(xiàn)象,但這項(xiàng)研究表明,氣候變化的重大影響會(huì)給你帶來(lái)切身體會(huì)。環(huán)境保護(hù),不僅要“全球著眼,本地入手”(Environmental protection, think worldly, act locally.),同時(shí)也要“著眼本地”( also think locally)。

—Christopher Intagliata

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