淮河中游本世纪气候与环境波动的湖泊记录证据  

Sedimentary Records of Climatic and Environmental Fluctuation of Middle Reaches of Huaihe River in This Century

作　　者：王云飞[1] 夏威岚[1] 潘红玺[1] 胡守云[1] 杨世蓉[2] 

机构地区：[1]中国科学院南京地理与湖泊研究所湖泊沉积与环境开放实验室,南京210008 [2]中国科学院南京地质与古生物研究所,南京210008

出　　处：《湖泊科学》1998年第2期52-57,共6页Journal of Lake Sciences

基　　金：国家自然科学基金!49271068

摘　　要：为研究本世纪淮河中游气候与环境波动的湖泊沉积响应，1991秋季在女山湖湖心提取了4．8m沉积物．对顶部20cm沉积物运用210Pb、137Cs的年代定位，获得1904－1991年湖泊沉积物的年序．以此通过高分辨沉积记录的代用标志提取，重建了本世纪女山湖气候与环境的变化过程．结果表明，本世纪最初20－30年女山湖地区温度偏低、湿度偏大；40、50年代为本世纪温度最高的时段，50至60年代中期为延续最长的偏湿时段．温度在60年代一度降低．70年代中期后回升并以正偏为主．其干湿在60年代中期后变化频繁，但80年代中期以后又趋暖湿．The history of climatic and environmental fluctuation of Nushan Lake in this century is reconstructed based on the data of high-resolution climatic and environmental proxies of the lake sediments and the time series of 1904 - 1991 buildt up by 137Cs and 210Pb dating. The results suggest that during the beginning 20 - 30 years of this century, there was lower temperature and higher humidity in Nushan Lake area. Then, in the period of the 1940-1950's. the temperature reached to the maximum, but cooled down in the 1960's andwarmed up after 1970. After then, the humidity changed freguently until the middle of the 1980's. when the climate in the area became a little humid again.It is noticeable that the above conclusions coincide with that from the deta of historical and instrumental records of this area. So the method used here can provide evidences for reconstruction of climate and environment change on a short time scale of lack-instrumental records area.

关 键 词：沉积记录 气候波动 环境波动 淮河中游 近代气候 

分 类 号：P467[天文地球—大气科学及气象学] X141[环境科学与工程—环境科学]