摘要
本文通过对三义黄土剖面孢粉资料的分析,初步重建了内蒙克旗地区16000 a以来植被及环境的变迁过程.约16 010～15 380 aBP,植被稀疏,气候寒冷而干燥;约15 380～11270 a B P,植被以草本植物为主,气候变得更加干旱;约11270～9 940 a B P,气候总体上由先前的冷干开始向暖湿方向发展,植被仍以草原为主;约9 940～2 320 a B P,植被得到进一步发展,气候表现出温暖湿润的特征;约2 320 a B P至今,植被仍以草原为主,气候向温凉方向发展.
Palynological records from Sanyi profile in Hexiqten Qi of Inner Mongolia have revealed the local vegetation and environmental history in the past 16 000 years. A very low total pollen concentration suggests a sparse vegetation and cold-dry climate during Ca. 16 010～ 15 380 a B P. Corresponding to the decreasing humidity, the vegetation was dominated by grassland during Ca. 15 380～11 270 a B P. From 11 270 to 9 940 a B P, the vegetation remained to be the grassland, and the raised concentration of the pollen might mean rising temperature and humidity around Hexiqten Qi. Quite a few pollen grains of Ca. 9 940～2 320 a B P were found, which might have resulted from the expansion of forests and grassland somewhere around Hexiqten Qi. This change must have been cansed by climatic warming and wetting in this time interval. During the last 2 320 a B P, the vegetation in Keqi was dominated by herbs, and the paleoclimate was cold.
出处
《地球学报》
EI
CAS
CSCD
北大核心
2005年第5期449-453,共5页
Acta Geoscientica Sinica
基金
国家自然科学基金项目(编号:40002014)
国土资源部2002年自由探索项目(编号:2002402)资助。
