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本文依据青岛胶州湾地区钻孔岩芯的孢粉分析结果,提出该区距今20000年以来,古植被与古气候可以分为六个发展阶段:(1)距今20000—13000年,为草原植被,气候干冷。(2)13000—11000年,为具少量针叶树的森林草原,水生、湿生植物较为繁盛,气候温和湿润。(3)11000—8500年,为少量针、阔叶树的森林、草原,气候温和略干。(4)8500—5000年,为以阔叶树为主的针、阔叶森林,气候温暖潮湿。(5)5000—2500年,为以针叶树为主的针、阔叶森林、草原,气候温和略干。(6)2500年至今,早期为针、阔叶森林、草原,气候温暖湿润;晚期以针叶树为主并含少量阔叶树的森林,气候温和湿润。如果以气候明显转暖作为划分更新世与全新世的分界,在青岛胶州湾地区,此界限划在11000年左右为宜。
Based on the sporopollen analysis of borehole core in Jiaozhou Bay, Qingdao, this paper proposes that the ancient vegetation and palaeoclimate can be divided into six stages since the region was 20000 years ago: (1) from 20000 to 13000 years ago, Vegetation, the climate is dry and cold. (2) From 13000 to 11000, for the forest grassland with a few conifers, aquatic plants and wet plants are more prosperous and the climate is mild and humid. (3) 11000-8500 years, for a small needle, broad-leaved forest, grassland, mild climate slightly dry. (4) 8500-5000 years, as broad-leaved needle, broad-leaved forest, warm and humid climate. (5) 5000-2500 years, coniferous needle, broad-leaved forest, grassland, a mild climate slightly dry. (6) From 2500 to now, the early needle, broad-leaved forests, grasslands, warm and humid climate; late conifers and coniferous forest with a small amount of broad-leaved trees, the climate is mild and humid. If the climate is obviously warmer as the dividing line between the Pleistocene and the Holocene, this boundary should be around 11000 in the Jiaozhou Bay area of Qingdao.