中国沿岸现代相对海平面上升加剧

FASTER RISING OF MODERN RELATIVE SEA LEVEL ALONG CHINA COAST

本文用线性回归方法,分两个时段分析了中国沿岸25个验潮站相对海平面的年变化速度,计算了相应时段的平均海面,结果表明,中国沿岸现代相对海平面上升加剧。另外,本文还对海平面变化原因进行了讨论。

Based on regression method,annual sea-level changes at 25 tide stations have been analyzed and calculated. The results show that China coastal sea level goes up in the same way as the global sea level,although the ranges are different in different coast areas. Vertical deformation of modern crust and surface subsidence can greatly influence relative sea-level changes in a certain area and they can control tendency and amplitude of relative sea-level changes within a certain extent. 'Greenhouse effect 'that has made the world warmer is the main factor to cause the fast rising of relative sea level along China coast. In recent year s,over-extraction of groundwater has made surface subside, which gives a hand to sea-level rise. The fast rising of relative sea level will make the coast's natural environments very complicated. The disasters such as storm surge,coast erosion and sea water intrusion will do great harm to coastal economic development. Therefore,it is very necessary to adopt effective measures to reduce the disasters.