手机APP下载

您现在的位置: 首页 > 在线广播 > VOA慢速英语 > VOA慢速-科技报道 > 正文

VOA慢速英语(翻译+字幕+讲解):加拿大最后一个完整北极冰架坍塌

来源:可可英语 编辑:aimee   可可英语APP下载 |  可可官方微信:ikekenet
 下载MP3到电脑  批量下载MP3和LRC到手机
加载中..
EQBTu38%gWPr_;Lpg-f7

aPw2lYKv5nY

Canada's Last Full Arctic Ice Shelf Collapses
The last fully complete ice shelf in the Canadian Arctic has collapsed.
The Milne Ice Shelf is at the edge of Ellesmere Island, in the far northern Canadian territory of Nunavut. The ice shelf, researchers say, lost more than more than 40 percent of its area in just two days at the end of July.
"Above normal air temperatures, offshore winds and open water in front of the ice shelf are all part of the recipe for ice shelf break up," the Canadian Ice Service said on Twitter when it announced the loss earlier this month.
Luke Copland is a glaciologist at the University of Ottawa and was part of the research team studying the Milne Ice Shelf. "...Cities are that size," he said. "These are big pieces of ice."
The shelf's area shrank by about 80 square kilometers. By comparison, the island of Manhattan in New York covers about 60 square kilometers.
The Arctic has been warming at two times the worldwide rate for the last 30 years. This year, temperatures in the polar area have been especially intense. The polar sea ice hit its lowest total amount for July in 40 years. Record heat and wildfires have burned Siberian Russia.
Summer in the Canadian Arctic this year has been 5 degrees Celsius above the 30-year average, Copland said. That has threatened smaller ice caps, which can melt quickly because they do not have the weight that larger glaciers have to stay cold. As a glacier disappears, more bedrock is left uncovered. This then speeds up the melting process.

-3XpyNqz]g9i

加拿大最后一个完整北极冰架坍塌.jpg
A research camp, including instruments for measuring water flow through the ice shelf, was lost when the shelf at Ellesmere Island collapsed. "It is lucky we were not on the ice shelf when this happened," researcher Derek Mueller of Carleton University in Ottawa wrote in a recent online article.
Ellesmere also lost its two St. Patrick Bay ice caps this summer.
"It was only a matter of time," said Mark Serreze, director of the National Snow and Ice Data Center (NSIDC) in Boulder, Colorado.
Serreze and other scientists at the center had published a 2017 study predicting the ice caps were likely to disappear within five years. Scientists believe the ice caps formed several centuries ago.
Their disappearance, Serreze said, was confirmed last month, when NASA satellite images of the area showed a complete lack of snow and ice.
Serreze studied the ice caps as a student on his first trip to the Arctic many years ago. At the time, he said, the caps had seemed like immovable parts of the surrounding area.
"When I was there in the 1980s I knew every square inch of those ice caps," Serreze said. "You have the memories. It's like your first girlfriend."
Another two ice caps on Ellesmere — called Murray and Simmons — are also shrinking and are likely to disappear within 10 years, Serreze said.
I'm Ashley Thompson.

Nhv;LF8h]0CQT*U;M

]OUg4nHCfXLxzeO^bgrj

o)TqFE.Uutjs[)3YK1qH_=h0+Q;kd[fv.e[QPK1RR^(t

重点单词   查看全部解释    
melt [melt]

想一想再看

vi. 融化,熔化,消散
vt. 使融化,使熔

 
uncovered [,ʌn'kʌvəd]

想一想再看

adj. 无覆盖物的;未保险的;无盖的 v. 脱帽致敬;

 
comparison [kəm'pærisn]

想一想再看

n. 比较

联想记忆
immovable [i'mu:vəbl]

想一想再看

adj. 固定的,不动的,无法改变的,无感情的

联想记忆
recipe ['resipi]

想一想再看

n. 食谱,秘诀,药方

联想记忆
intense [in'tens]

想一想再看

adj. 强烈的,剧烈的,热烈的

联想记忆
gravity ['græviti]

想一想再看

n. 重力,严重,庄重,严肃

联想记忆
director [di'rektə, dai'rektə]

想一想再看

n. 董事,经理,主管,指导者,导演

 
boulder ['bəuldə]

想一想再看

n. 大圆石,巨砾

联想记忆
announced [ə'naunst]

想一想再看

宣布的

 

发布评论我来说2句

    最新文章

    可可英语官方微信(微信号:ikekenet)

    每天向大家推送短小精悍的英语学习资料.

    添加方式1.扫描上方可可官方微信二维码。
    添加方式2.搜索微信号ikekenet添加即可。