摘要
依据宁晋泊南王庄剖面的孢粉、粘土矿物、粒度等数据和Ｐｏｒｔｅｒ等的粒度年龄模型建立时间标尺，划分出２６００年来的气候冷暖变化阶段。基本特征如下：孢粉Ⅰ带，大约２００ａＢＰ～６３０ａＢＰ，气候冷干；Ⅱ带，大约６３０ａＢＰ～１０１０ａＢＰ，气候温暖，上部偏干，下部潮湿；Ⅲ带，大约１０１０ａＢＰ～１１６５ａＢＰ，气候稍冷较湿；Ⅳ带，大约１１６５ａＢＰ～１３５０ａＢＰ，气候温暖潮湿；Ⅴ带，大约１３５０ａＢＰ～１７９０ａＢＰ，气候偏凉干；Ⅵ带，大约１７９０ａＢＰ～２２５０ａＢＰ，气候温暖偏干；Ⅶ带，大约２２５０ａＢＰ～２５８０ａＢＰ，气候寒冷干旱。这与华北地区古文史资料记录的古气候变化有较好的一致性，并具有全球变化意义。
Based on the data of sporpollen assemblages,clay minerals,and grain size of the Nanwangzhuang section in the Ningjin lake area,and the timescale established from the age/grain size model by Porter et al ,the climatic fluctuations in the last 2600 years are brought out to light as reflected by the seven sporopollen zones.Zone Ⅰ representing a cold and dry climate was ca.200~630 aBP in age,Zone Ⅱ formed in a warm and humid climate in ca.630~1010 aBP,Zone Ⅲ indicative of a cold and humid climate was of an age of ca.1010~1165 aBP,Zone Ⅳ again warm and humid in ca.1165~1350 aBP,Zone Ⅴ,being characteristic of a slightly cool and dry climate was ca.1350~1790 aBP old,Zone Ⅵ,warm and a little dry in ca.1790~2250 aBP,Zone Ⅶ cold and dry in ca.2250~2580 aBP.Such climatic fluctuations well accord with the historical records and may be of a global significance.
出处
《地质力学学报》
CSCD
1999年第4期73-79,共7页
Journal of Geomechanics
基金
国家自然科学基金!资助项目(49402033)
中国气象局气候研究开放实验室项目
地质矿产部 "九五"重点基础项目!(95011
关键词
高分辨率
湖泊沉积
古气候
2600年
华北平原
high resolution
lake sediment
paleoclimate
2600 years
North China Plain
