华北-内蒙交界地带全新世环境演变与区域差异  

Holocene Environment Evolution and Regional Differences in the Border Region of the North China and Inner Mongolia

作　　者：王梦泽 张俊娜[1] 陈志尧 WANG Meng-ze;ZHANG Jun-na;CHEN Zhi-yao(College of Arts and Science, Beijing Union University, Beijing 100191, China)

机构地区：[1]北京联合大学应用文理学院,北京100191

出　　处：《榆林学院学报》2021年第2期32-37,共6页Journal of Yulin University

基　　金：国家自然科学基金项目(41971114,41501216);国家社会科学重大项目(18ZDA172);北京联合大学人才强校项目(BPHR2020CS01)。

摘　　要：华北-内蒙交界地带属于环境敏感带和农牧交错带,是研究全新世古环境的代表性区域,重建该区全新世古环境演变过程及区域差异,是了解该区域考古学文化和古代人地关系的重要前提。通过对本区古气候记录的梳理,探讨了区域内两个不同地貌单元——坝上与坝下地区全新世古环境演变的相似性与差异性。结果表明,早全新世本区整体由干冷向暖湿发展,植被为草原和针阔混交林,坝下大部分地区干凉为主,植被由草原向阔叶林转化;中全新世时期区域整体暖湿,植被以阔叶林为主,其间坝上经历了约4~5次冷暖干湿波动,5000a BP左右存在相对变干旱的时期,部分湖泊干涸,坝下也经历了约4次冷暖干湿波动,针阔混交林与阔叶林为主;晚全新世时期坝上与坝下整体气候有在冷暖干湿波动中变凉变干的趋势,植被整体有从针阔混交林向草原变化的趋势。The North China-Inner Mongolia border zone belongs to the environment sensitive zone and the farming-animal husbandry ecotone.It is a representative area to study the Holocene paleoenvironment.Reconstructing the evolution process and regional differences of the Holocene Paleoenvironment in this area is an important prerequisite for understanding the regional archaeological culture and the relationship between ancient man and land.In this paper,the similarity and difference of Holocene paleoenvironment evolution between Bashang and Baxia are discussed by combing the paleoclimate records in this area.The results show that in the early Holocene,the whole area developed from dry and cold to warm and wet,and the vegetation was grassland and mixed forest of coniferous and broadleaf.Most areas of Baxia were also dominated by cold and dry climate,and the vegetation was transformed from grassland to broadleaf forest.In the middle Holocene,the region was relatively warm and humid,with broad-leaved forest as the main vegetation.During this period,the Bashang experienced about 4~5 climate fluctuations,and there was a relatively dry period around 5000 a BP.Some lakes dried up,and the Baxia also experienced about 4 climte fluctuations,with mixed coniferous and broad-leaved forests as the main vegetation.In the late Holocene,the climate of the whole region tended to be cool and dry,and the vegetation changed from coniferous and broad-leaved mixed forest to grassland.

关 键 词：环境考古 新石器 孢粉 古气候 

分 类 号：P532[天文地球—古生物学与地层学]