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AS IT IS 2016-08-10 Cold War Waste Could Reappear Due to Global Warming 全球变暖致美国冷战基地再现
Melting ice on Greenland could expose an unused U.S. military base that contains hazardous1 waste, scientists warn.
Camp Century was built in 1959. The base was to study the possibility of deploying2 nuclear weapons from the Arctic during the Cold War. The Cold War was a period of tension between the former Soviet3 Union and the U.S. which lasted from the end of World War II to 1991.
The base was closed in 1967. Scientists thought that any hazardous material left at the base would be covered with ice forever. Now, new research suggests the base could be exposed to the environment by 2090.
The base is believed to contain biological, chemical and radioactive waste. The study warns that exposed waste could disrupt Greenland’s environment.
William Colgan is a climate and glacier4 scientist at York University in Canada. He is the lead author of the study. He said people dealt with waste differently 60 years ago. Now, there are new problems related to the climate that people must think about, he said.
Researchers have now listed the waste at the base. The hazardous substances include 200,000 liters of diesel5 fuel, and 240,000 liters of wastewater. There are also polychlorinated biphenyls, or PCBs, at the site. Those chemicals are considered bad for the environment.
In addition, there is also an “unknown volume of low-level radioactive coolant from the nuclear generator6.”
Researchers studied old engineering records to find out how deeply the waste is buried and how much the ice has moved since the 1960s.
All the waste could enter the environment as the climate warms and the ice sheet melts, researchers said.
"The question is whether it's going to come out in hundreds of years, in thousands of years, or in tens of thousands of years," said James White. He is a climate scientist at the University of Colorado in Boulder7 who was not involved in the study.
Camp Century covers an area about the size of 100 soccer fields. It is about 200 kilometers from Greenland’s coast. Nearly 200 soldiers lived there when it was an operating U.S. base.
The camp was sometimes called “the city under the ice.”
Any possible cleanup of the site could be tricky8. The base belonged to the U.S. However, Greenland belongs to Denmark.
International law has clear rules about dealing9 with hazardous waste. But, it is not clear on who is responsible for cleaning up the waste from a long time ago.
The study was published this week in Geophysical Research Letters, a journal of the American Geophysical Union.
Words in This Story
hazardous – adj. involving risk or danger
disrupt – v. to interrupt the normal progress or activity
radioactive – adj. having or producing a powerful and dangerous form of energy
coolant – n. a liquid that is used to cool an engine or machine
generator– n. something that produces something?
ice sheet– n. a very large and thick area of ice that covers a region
1 hazardous | |
adj.(有)危险的,冒险的;碰运气的 | |
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2 deploying | |
(尤指军事行动)使展开( deploy的现在分词 ); 施展; 部署; 有效地利用 | |
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3 Soviet | |
adj.苏联的,苏维埃的;n.苏维埃 | |
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4 glacier | |
n.冰川,冰河 | |
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5 diesel | |
n.柴油发动机,内燃机 | |
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6 generator | |
n.发电机,发生器 | |
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7 boulder | |
n.巨砾;卵石,圆石 | |
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8 tricky | |
adj.狡猾的,奸诈的;(工作等)棘手的,微妙的 | |
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9 dealing | |
n.经商方法,待人态度 | |
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