60.Why Antarctica Is Being Explored 为什么要勘探南极洲 When the United States was born,the continent of Antarctica was as remote as the moon-more so,in a way,because the moon was clearly visible and the very existence of Antarctica was uncertain. But now that remote land area is so attaina...
The ice sheet is a holdover from the last ice age, when mile-high glaciers extended not just across Greenland but over vast stretches of the Northern Hemisphere. In most places—Canada, New England, the upper Midwest, Scandinavia—the ice melted away about ten thousand years ago. In Greenla...
根据最后一段“Antarctica was the last continent to be discovered. But more than two thousand years ago Greek geographers believed that there was a large land mass in the south which balanced the land in the north. They called it Anti-Arktikos, or Antarctica: the opposite of Arctic (北极) ...
At present, the Antarctic ice sheet is losing mass at a rate almost comparable to that of the Greenland ice sheet, about 250 ± 31 Gt/year or 0.7 mm/year sea level rise, and the mass loss is increasing with time, at a rate slightly below that observed in Greenland, at 14 ± 2 ...
Antarctica (南极洲) is a great, icy land mass, surrounded by the huge Southern Ocean. The ice in Antarctica doesn’t just cover the land. There’s also a huge area of sea ice which floats (漂浮) on the ocean’s surface. However, scientists have reported that Antarctica’s sea ice is...
The long termtrendsince the 1970s is accelerating ice mass loss. This is confirmed by gravity satellite measurements over the past 9 years which find that the rate of ice mass loss has doubled over the last 9 years. Just as withAntarctica, Greenland'sice sheetcontribution to rising sea leve...
As these satellites fly over Antarctica, they read changes in the ice thickness down to the centimetre. This provides a precise picture of how the ice is thinning or accumulating in different parts of the continent. Content continues below ...
Antarctica is a great, icy land mass (冰陆块), and around it is the Southern Ocean. The ice in Antarctica doesn’t just cover the land. There’s also a large area of sea ice on the ocean. Usually, the sea ice covers the greatest area around September 23rd, as winter ends at the...
Greenland is gaining ice “[E]ven if it were true that Greenland’s ice had been melting at ‘new record’ rates, after seven and a half years of global cooling global warming cannot be the cause. The true position in Greenland is to be found inJohannessen et al. (2005), where sat...
there is a time for e there is a trend towa there is a view among there is absolutely n there is always a lot there is an event com there is an exception there is an ice cream there is gain and los there is hope as long there is insufficient there is more in you there is more...