Climbing nighttime temperatures, driven by climate change, may harm human sleep, a new study revealed, with the poor and elderly most affected.

一項最新研究表明，氣候變化導致的夜間氣溫上升，可能危害人們的睡眠，其中低收入者和老人受到的影響最大。

"What our study shows is not only that ambient temperature can play a role in disrupting sleep but also that climate change might make the situation worse by driving up rates of sleep loss," Nick Obradovich, who conducted much of the research as a doctoral student in political science at the University of California San Diego, said in a statement.

加利福尼亞大學圣地亞哥分校的政治學博士、該研究的負責人尼克·奧布拉多維奇在一份聲明中說道：“我們的研究不僅表明環境溫度可干擾睡眠，而且還能顯示出氣候變化導致睡眠損失率上升，可能讓情況變得更糟。”

In a study published last week by the U.S. journal Science Advances, Obradovich and colleagues looked at responses from 765,000 individuals across the United States who took part in a public health survey, alongside temperature data from 2002 to 2011.

美國雜志《科學進展》于上周刊登了奧布拉多維奇和其同事的一項研究，他們分析了76.5萬名參與調查的美國公民在2002年至2011年的睡眠數據。

They found that a one-degree Celsius increase in nighttime temperature translates to three nights of insufficient sleep per 100 individuals per month.

研究表明，夜間氣溫每上升1攝氏度，將導致每月每100人中多出3個睡眠不足的夜晚。

"To put that in perspective: If we had a single month of nightly temperatures averaging one degree Celsius higher than normal, that is equivalent to nine million more nights of insufficient sleep in a month across the population of the United States today, or 110 million extra nights of insufficient sleep annually," the study said.

該研究稱：“換句話說，如果夜間氣溫比正常情況高1攝氏度，那么美國人單月將多出900萬個睡眠不足的夜晚，1年則將多出1.1億個睡眠不足的夜晚。”

The negative effect of warmer nights is most acute in summer, the research showed. It is almost three times as high in summer as during any other season.

另外，夏季夜間氣溫上升對睡眠的負面影響更為明顯，幾乎是其他季節的3倍。

It also revealed that those whose income is below 50,000 U.S. dollars and those who are aged 65 and older are affected most severely.

該研究還顯示，年收入在5萬美元以下的人和65歲以上的老人受影響最嚴重。

For older people, the effect is twice that of younger adults. And for the lower-income group, it is three times worse than for people who are better off financially.

對老年人的影響是年輕人的2倍，對低收入人群的影響是高收入人群的3倍。

Climbing nighttime temperatures, driven by climate change, may harm human sleep, a new study revealed, with the poor and elderly most affected.

一項最新研究表明，氣候變化導致的夜間氣溫上升，可能危害人們的睡眠，其中低收入者和老人受到的影響最大。

"What our study shows is not only that ambient temperature can play a role in disrupting sleep but also that climate change might make the situation worse by driving up rates of sleep loss," Nick Obradovich, who conducted much of the research as a doctoral student in political science at the University of California San Diego, said in a statement.

加利福尼亞大學圣地亞哥分校的政治學博士、該研究的負責人尼克·奧布拉多維奇在一份聲明中說道：“我們的研究不僅表明環境溫度可干擾睡眠，而且還能顯示出氣候變化導致睡眠損失率上升，可能讓情況變得更糟。”

In a study published last week by the U.S. journal Science Advances, Obradovich and colleagues looked at responses from 765,000 individuals across the United States who took part in a public health survey, alongside temperature data from 2002 to 2011.

美國雜志《科學進展》于上周刊登了奧布拉多維奇和其同事的一項研究，他們分析了76.5萬名參與調查的美國公民在2002年至2011年的睡眠數據。

They found that a one-degree Celsius increase in nighttime temperature translates to three nights of insufficient sleep per 100 individuals per month.

研究表明，夜間氣溫每上升1攝氏度，將導致每月每100人中多出3個睡眠不足的夜晚。

"To put that in perspective: If we had a single month of nightly temperatures averaging one degree Celsius higher than normal, that is equivalent to nine million more nights of insufficient sleep in a month across the population of the United States today, or 110 million extra nights of insufficient sleep annually," the study said.

該研究稱：“換句話說，如果夜間氣溫比正常情況高1攝氏度，那么美國人單月將多出900萬個睡眠不足的夜晚，1年則將多出1.1億個睡眠不足的夜晚。”

The negative effect of warmer nights is most acute in summer, the research showed. It is almost three times as high in summer as during any other season.

另外，夏季夜間氣溫上升對睡眠的負面影響更為明顯，幾乎是其他季節的3倍。

It also revealed that those whose income is below 50,000 U.S. dollars and those who are aged 65 and older are affected most severely.

該研究還顯示，年收入在5萬美元以下的人和65歲以上的老人受影響最嚴重。

For older people, the effect is twice that of younger adults. And for the lower-income group, it is three times worse than for people who are better off financially.

對老年人的影響是年輕人的2倍，對低收入人群的影響是高收入人群的3倍。