陕西富县晚更新世的植被与气候  

Vegetation and Climate During the Late Pleistocene in Fu County, Shaanxi

作　　者：李秉成[1] 柯曼红[1] 

机构地区：[1]长安大学环境科学与工程学院

出　　处：《干旱区资源与环境》2006年第5期173-176,共4页Journal of Arid Land Resources and Environment

基　　金：中科院西安黄土与第四纪地质开放研究实验室基金资助项目(9901611)

摘　　要：为了了解黄土高原中部晚更新世的古气候演化特征,通过对陕西富县剖面的地质调查、密集采样和54个样品的孢粉分析,将孢粉图式划分为Ⅰ、Ⅱ、Ⅲ三个带分别代表S1、L1和S0三个形成时期的孢粉带:Ⅰ带为榛—菊—蒿组合带,以草本植物孢粉占多数,乔木植物花粉出现高峰为特征;Ⅱ带为菊、蒿优势带,以草本植物花粉占优势,乔木植物花粉显著减少为特征;Ⅲ带为松—藜—中华卷柏增长带,以松、藜、中华卷柏显著增加,乔木植物明显增长为特征。结果表明S1形成时期植被为疏林草原,气候温暖较湿;L1形成时期植被为干草原,气候冷干;S0形成时期植被为森林草原,气候温凉干旱。With the intention to comprehend the evolution characteristics of the prehistoric climate of the late Pleistocene in the middle area of loess plateau, we divided the sporopollen diagram into three different zones according to the geological investigation ,intensive samples chosen and sporopollen analysis to fifty -four samples of the cross section in Shaanxi-Fu County. The three zones represented S1 ,L1 and S0 sedimentary periods respectively. The first zone is combinatorial zone of Corylue-Compositae-Artemisia, with the characteristic that herbaceous plant pollen is predominant and the arbor plant pollen is of high content. The second zone is combinatorial zone of Compositae-Artemisia,with the characteristic that herbaceous plant pollen is predominant and the decrease of arbor plant pollen. The third which is named combinatorial zone of Pinus -Chenopodiaceae-Selaginella tarnariscina is marked by the increase of Pinus,Chenopodiaceae, Selaginella tamariscina pollen and the increase of arbor pollen. The result indicated that the vegetation of S1 sedimentary periods was savannah forest grassland, climate was warm and weter; The vegetation of L1 sedimentary periods was dry grasslands, climate was cold and dry; The vegetation of So sedimentary periods was forest grassland, climate was warmer, cool and droughty.

关 键 词：植被与气候 晚更新世 陕西富县 

分 类 号：P461.7[天文地球—大气科学及气象学]