海平面上升是一个全球性的现象。人们一直将海平面上升视为全球气候变暖的副产品,这是因为全球变暖融化了两极冰山,给海洋带来更多的水;另一方面,海水会因受热而膨胀,将海平面推得更高。有研究表明,自20世纪后半期以来,全球海平面以平均每年1.8毫米的速度上升。最近,美国国家研究委员会发布了一份有关海平面上升的报告。报告称:到2100年,全球海平面将上升50～140厘米,这一数据大大超过了2007年时联合国气象报告的预测。据科学家估算,海平面上升1米,就将会对世界上主要的沿海城市、岛国和人口密集的三角洲造成破 Sea level rise is a global phenomenon. People have always viewed sea-level rise as a by-product of global warming because global warming melts polar icebergs and brings more water to the oceans; on the other hand, the sea swells due to heat and pushes sea level Higher. Studies have shown that since the second half of the 20th century, the global sea level has risen at an average rate of 1.8 millimeters per year. Recently, the National Research Council released a report on sea level rise. The report said: By 2100, the global sea level will rise 50 to 140 cm, the data far exceeded the forecast of 2007 UN Meteorological Report. Scientists estimate that a rise of one meter in sea level will cause a break in the major coastal cities, island nations and densely populated deltas in the world