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。
Global warming,caused by the atmospheric build—up of CO_2 and trace gases(CH_4, N_2O, 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.
出处
《地理科学》
CSSCI
CSCD
北大核心
1993年第3期250-256,共7页
Scientia Geographica Sinica
关键词
全球变暖
海平面上升
环境效应
Global warming
Eustatic sea level rise
Relative sea level rise
Environmental effect
