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南极洲左近的海冰急剧增加

kira86 于2019-07-09公布 l 已有人阅读
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迷信家们称,南极洲左近的海冰量在短短几年内就从创记录的最高值降落到汗青最低值。海冰是掩盖陆地而非海洋的冰。
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Sea Ice around Antarctica Shows Sharp Decrease

南极洲左近的海冰急剧增加

Scientists say the amount of sea ice around Antarctica has decreased from a record high to a record low in only a few years.

迷信家们称,南极洲左近的海冰量在短短几年内就从创记录的最高值降落到汗青最低值。

Sea ice is ice covering the ocean rather than land.

海冰是掩盖陆地而非海洋的冰。

Ice floating in the waters around the Antarctic continent started increasing in 1979, about the time satellite observations first started.

1979年,约莫刚开端卫星观察的时分,南极大陆四周水域的浮冰就开端增多。

The amount of Antarctic sea ice reached a record high in 2014. But a study of data gathered by satellites from the United States space agency NASA showed something different three years later. The data suggested that the yearly average amount of Antarctic sea ice reached its lowest level.

2014年,南极海冰量创下最高汗青记载。但美国宇航局(NASA)卫星搜集的数据研讨标明,三年后状况有所差别。这些数据标明,南极海冰的年均匀量到达了最低程度。

Scientists released the findings on July 1 in a study published in the Proceedings of the National Academy of Sciences.

迷信家们于7月1日在《美国国度迷信院院院刊》的一项研讨中发布了这一发明。

National Snow and Ice Data Center director Mark Serreze said that, in recent years, “things have been crazy.” He told The Associated Press the quickly decreasing ice levels are a “white-knuckle ride.”

国度冰雪数据中央主任马克·塞雷泽表现,比年来,“事变变得很不正常。”他通知美联社,冰层的敏捷降落“令人告急担心”。

Serreze and other experts said they do not know what has caused the loss of ice. It could be a natural change, or a result of rising world temperatures caused by human activity.

塞雷泽和其他专家表现,他们不晓得是什么招致了海冰的增加。能够是天然变革,也能够是人类运动招致环球变暖的后果。

“But the fact that a change this big can happen in such a short time should be viewed as an indication that the Earth has the potential for significant and rapid change,” said University of Colorado ice scientist Waleed Abdalati.

“但是,在这么短的工夫内发作这么大的变革,这一现实应该被视为一种意味,那便是地球有能够发作严重而敏捷的改动,” 科罗拉多大学研讨冰层的迷信家瓦利德·阿卜杜拉蒂说。

In the polar areas, sea ice levels increase during the winter and shrink in the summer. Around Antarctica, sea ice covered an average area of 12.8 million square kilometers in 2014. But the study shows that by 2017, only 10.7 million square kilometers of sea was covered by ice.

在极地地域,夏季海冰冰面上升,冬季海冰冰面降落。2014年,南极海冰均匀掩盖面积为1280万平方公里。但研讨标明,到2017年,海冰掩盖面积只要1070万平方公里。

The difference represents an area bigger than the size of Mexico.

相差的面积比墨西哥的疆土面积还要大。

Claire Parkinson is the NASA climate scientist who wrote the report. She says losing that much sea ice in just three years “is pretty incredible” and faster than anything scientists have seen before.

克莱尔·帕金森是美国宇航局的天气迷信家,她撰写了这份陈诉。她表现,在短短三年内增加这么多的海冰“相称难以想象”,并且增加速率比迷信家以往察看到的任何工具都要快。

Antarctic sea ice increased slightly in 2018. Although sea ice is expanding during the winter in Antarctica, levels in May and June of this year were the lowest on record, the ice data center reported.

2018年南极海冰略有添加。据海冰数据中央报道,虽然南极海冰掩盖面积夏季不时扩展,但在往年5月和6月海冰掩盖面到达汗青最低值。

Antarctica’s temperatures are generally lower than those near the North Pole. In the north, the Arctic is a floating collection of ice on an ocean surrounded by land. Antarctica, in the south, is just the opposite, with land surrounded by an ocean. That causes the ice to develop much farther out, Parkinson said.

帕金森称,南极洲的温度通常比北极左近的温度低。在南方,北极地域陆地被海洋解围,下面满是漂泊的海冰。南极洲在南部,与其恰好相反,海洋被陆地解围,使得冰在更远的中央构成。

When Antarctic sea ice was expanding, scientists pointed to changes in wind and air pressure or the movements of the ocean.They also considered natural ongoing changes in the climate.

关于南极海冰掩盖面的扩展,迷信家们归因于风压和睦压的变革或陆地的活动。他们还思索到天气不时的天然变革的缘由。

Now, some of those explanations may need to be reconsidered, making what happens next a mystery, Parkinson said.

帕金森称,如今,有些表明能够需求重新思索,这使接上去能够发作的事变又成为一个谜。

I’m Pete Musto.

皮特·穆斯托报道。

 

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