摘要
随着全球气候逐渐变暖,海平面上升,给人类带来了诸多灾害,研究古气候变化可以辅以预测未来气候变化规律,达到减灾防灾的目的。本文运用将古论今的方法,依据太湖东岸SZ03孔孢粉植物群的组合特征和各科属含量变化的特点,参考碳屑、低等菌孢子、水生藻类的绝对浓度变化,将钻孔第四纪沉积物划分为四大孢粉组合。研究结果表明,该地区更新世早期气候变化为暖湿-暖相对湿-冷干的过程;更新世中期气候环境开始出现显著波动,经历了相对冷干-冷湿-较暖湿-暖湿-较暖湿的气候;更新世晚期本区经历了最大海侵,全新世时期,处于冰后期,气候回暖,降雨充沛,与现在的气候条件具有相似之处。
Global warming and sea level rising have brought numerous disasters. Extrapolation of paleoclimate variations can help to predict climate change laws in the future and to prevent disasters. In this paper, Quaternary sediments from hole SZ03 in the east coast of Taihu Lake were divided into 4 sporo-pollen assemblages. The methods and materials included the principle that ＂the present is the key to the past＂, the assemblage characteristics of palynoflora, the content variations of many genera, and the absolute concentration changes of charcoal particles, lower bacteria spores, and aquatic algae. The results showed that： this region underwent a climate transition of warm wet-warm and relatively wet-cold dry in early Pleistocene; significant climate fluctuations occurred in the middle Pleistocene with a transition of cold dry-old wet-slightly warm wet-warm wet-slightly warm wet; this region suffered from the largest marine transgression in the late Pleistocene; in the Holocene which belonged to postglacial period, this region became warm again with abundant rainfall, and the climate was very similar to that of today.
出处
《矿物岩石地球化学通报》
CAS
CSCD
北大核心
2014年第1期38-48,共11页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
中国地质调查局
江苏省国土资源厅
苏州市人民政府合作行政事业性项目(1212010710610)
关键词
太湖
SZ03孔
第四纪
孢粉组合
环境变迁
Taihu Lake
hole SZ03
Quaternary
sporopoun assemblage
environmental change
