形象大使
保护冰川融化英语文案形容多的词语
腰缠万贯It ems unthinkable, but for the first time in human history, ice is on cour to disappear entirely from the North Pole this year.
炒苍术的功效与作用The disappearance of the Arctic a ice, making it possible to reach the Pole sailing in a boat through open water, would be one of the most dramatic – and worrying – examples of the impact of global warming on the planet. Scientists say the ice at 90 degrees north may well have melted away by the summer.
"From the viewpoint of science, the North Pole is just another point on the globe, but symbolically it is hugely important. There is suppod to be ice at the North Pole, not open water," said Mark Serreze of the US National Snow and Ice Data Centre in Colorado.
大学生现状
If it happens, it rais the prospect of the Arctic nations being able to exploit the valuable oil and mineral deposits below the a bed which have until now been impossible to extract becau of the thick a ice above.
Seasoned polar scientists believe the chances of a totally ice-free North Pole this summer are greater than 50:50 becau the normally thick ice formed over many years at the Pole has been blown away and replaced by huge swathes of thinner ice formed over a single year.
银耳汤怎么做胺碘酮片This one-year ice is highly vulnerable to melting during the summer months and satellite data coming in over recent weeks shows that the rate of melting is faster than last year, when there was an all-time record loss of summer a ice at the Arctic.高中美术教材
"The issue is that, for the first time that I am aware of, the North Pole is covered with extensive first-year ice – ice that formed last autumn and winter. I'd say it's even-odds whether the North Pole melts out," said Dr Serreze.
Each summer the a ice melts before reforming again during the long Arctic winter but the loss of a ice last year was so extensive that much of the Arctic Ocean became open water, with the water-ice boundary coming just 700 miles away from the North Pole
