地理科学 ›› 1993, Vol. 13 ›› Issue (3): 250-256,295.doi: 10.13249/j.cnki.sgs.1993.03.250

• 综述 • 上一篇    下一篇

全球海平面上升机制和趋势及其环境效应

杨桂山   

  1. 中国科学院南京地理与湖泊研究所 南京 210003
  • 收稿日期:1992-08-01 出版日期:1993-05-20 发布日期:1993-05-20

THE POSSIBLE CAUSES AND TRENDS OF GLOBAL SEA LEVEL RISE AND ITS ENVIRONMENTAL EFFECT

Yang Guishan   

  1. Nanjing Institute of Geography & Limnology, Academia Sinica, Nanjing 210008
  • Received:1992-08-01 Online:1993-05-20 Published:1993-05-20

摘要: 对全球海面上升的几种影响因素作了介绍和分析,对未来海面上升的估计值及其可能造成的环境影响,作了较系统的综述。

Abstract: Global warming,caused by the atmospheric build—up of CO2 and trace gases(CH4, N2O, CFCs)could raise global eustatic sea level. For processes appear as dominating on a time scale of decades to centuries: thermal expansion of oceans, melting of alpine glaciers and small ice caps, and changes in the mass balance of the large polar ice sheets (Greenland, Antarctica). But relative sea level rise in the different coastal areas are mainly controlled by local neotectonic movements and land subsidence by anthropogenic effects. Over last 100 years, climatic warming has raised global sea level by 10~15cm. There is no firm evidence to suggest that global eustatic sea level rise next century will exceed 100cm, most of the studies foresee a rising range between 50 cm and 100cm. Sea level rise will cause a series of environmental effects: permanent inundation, increased coastal erosion, temporary flooding and salt water intrusion of estuaries and aquifers, which will bring about enormous losses of society and economy and people’s life in the coastal areas.