她说:“这些森林遗迹之所以非常重要,是因为我们现在的二氧化碳水平已经达到百万分之400,如果过去地球的二氧化碳水平也曾经达到百万分之400,这也许就是地球将回归的状态。冰川时不时地会消退,不是一直消退而是偶尔消退,这可能会让植被重新覆盖南极洲大陆。”
Before the industrial revolution in 1850 carbon dioxide levels were about 280 ppm and since then the temperature has increased globally by around 1C, Prof Siegert added.
西格特教授补充说,在1850年工业革命之前,二氧化碳水平约为百万分之280,自那以后全球温度上升了约1摄氏度。
"What it means is that by the end of this century, we might expect another 1C,” he said.
他说:“这意味着到本世纪末,全球温度将再上升1摄氏度。”
If carbon dioxide emissions continue at current rates, levels could soar to 1000 ppm by 2100, he added.
他还说,如果二氧化碳排放量以目前速度持续下去,到2100年,大气中的二氧化碳水平将高达百万分之1000。
This is the same as estimated levels around 100 million years ago, when dinosaurs roamed the earth and Antarctica was warmer and much greener.
届时二氧化碳水平将和1亿年前持平,那时候的地球恐龙横行,南极洲比现在更温暖,也绿得多。
He called for global action to reduce the amount of carbon dioxide in the atmosphere.
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