长江三角洲末次盛冰期的气候波动  

CLIMATE FLUCTUATIONS IN THE YANGTZE DELTA DURING THE LAST GLACIAL MAXIMUM

作　　者：覃军干[1] 吴国瑄[2] 郑洪波[2] 周琪[1] 

机构地区：[1]同济大学环境科学与工程学院,上海200092 [2]同济大学海洋地质国家重点实验室,上海200092

出　　处：《海洋地质与第四纪地质》2007年第6期71-75,共5页Marine Geology & Quaternary Geology

基　　金：国家自然科学基金项目(40676033);上海市人才类政府项目(05XD14015)

摘　　要：通过对长江三角洲东部地区鹤鸣孔第一硬黏土层的孢粉、藻类分析,研究了该地区末次盛冰期的气候波动。结果表明,鹤鸣孔第一硬黏土层含种类较丰富的孢子、花粉和藻类化石,并可以划分为3个孢粉、藻类组合,代表了该地区末次盛冰期气候变化的3个阶段,反映了该地区末次盛冰期并不是一个持续的干冷状况,第一硬黏土层沉积的早期和晚期气候较温暖湿润,针阔叶混交林发育,而中期阶段气候偏冷,植被贫乏。Climate fluctuations during the Last Glacial Maximum have been a hot topic recently, based on fern spores, pollen and algae records of the first hard clay layer from HM core,three palynomorphs assemblages were recognized and climate conditions during the LGM were discussed. Palynomorphs assemblages 1 and 3 show that mixed conifer broadleaf forest developed, indicating relatively warm and wet climate conditions,while palynomorphs assemblage 2 shows that vegetation was almost absent, indicating a cold climate.

关 键 词：孢粉 藻类 硬黏土层 末次盛冰期 长江三角洲 

分 类 号：P532[天文地球—古生物学与地层学]