气候变化影响下苏北海岸的塑造过程  

Evolution of the Northern Jiangsu Coast Under the Impact of Climate Change

作　　者：胡进[1] 陈沈良[1] 胡小雷 张林[1] 谷国传[1] 

机构地区：[1]华东师范大学河口海岸学国家重点实验室,上海200062

出　　处：《上海国土资源》2013年第2期41-49,共9页Shanghai Land & Resources

基　　金：国家科技部"气候变化影响下典型海岸冲淤过程及演变趋势"(2010CB951202);华东师范大学河口海岸学国家重点实验室自主课题(SKLEC-2012KYYW06)

摘　　要：根据史料记载和气象记录综合分析,结合气候变化的原因、特点和冷暖波动的规律,以及地质时期和历史时期气候变化的差异,总结出我国从新石器时代至今,气候有过7个冷期和8个暖期的交替变化。目前正处于地质时期的间冰期、历史时期的暖期和全球气候的暖化期。研究表明,地质时期的气候变化常引起海平面大幅度的升降,从而控制海岸大范围的进退;而历史时期的气候变化则主要是通过海岸的物源供应和动力环境的变化,改变蚀淤速率,促进海岸淤涨或蚀退。气候变化的作用是一个缓慢的过程,具有潜在性。通过历史时期黄河流域降水波动与苏北废黄河口延伸速率相关分析发现,流域降水与海岸的延伸速率有显著的相关性,较好地反映了气候变化对海岸塑造的制约作用。This paper uses historical records and modern meteorological data to examine the characteristics of and reasons for climate change and the pattern of temperature fluctuation,with particular reference to the effects on the northern Jiangsu coast.The differences in climate change between geological periods and the historical period are also discussed.There have been seven cold periods and eight warm periods since the New Stone Age.At present,there is an interglacial period in the geological period,a warm phase in historical terms,and a warm interval in global climate.The study shows that climate change in geological periods always leads to a pronounced fluctuation in eustatic sea level,which affects the behavior of coastlines.Climate changes in the historical period have altered coastal erosion/deposition mainly through variation of sediment supply from the coast and through variation of environmental dynamics.The amount of rainfall in the Yellow River Basin is correlated with the rate of extension of the abandoned Yellow River mouth,which demonstrates the effect of climate change on coastal evolution.

关 键 词：气候变化 冷暖期 苏北海岸 废黄河三角洲 蚀淤速率 海岸塑造 

分 类 号：P736.22[天文地球—海洋地质]