泰山地区第四纪末次冰期古气候特征

PALEO-CLIMATIC CHARACTERISTICS DURING THE LAST GLACIAL STAGE OF QUATERNARY IN THE TAISHAN MOUNTAIAN AREA

采集泰山南坡沉积物样品进行年龄和孢粉测试,结合泰山地区现代气候特征,研究泰山地区第四纪末次冰期时的古气候特征。样品年龄测定显示其形成年代为(30.54±2.59)ka B P,相当于末次冰期主冰期时代;孢粉组合显示较耐冷的针叶植物松属孢粉占优势,耐寒耐冷的"中华卷柏+蒿属+藜科"孢粉有较多出现,优势植物种群为"松属+中华卷柏+蒿属+藜科",指示的沉积环境比较寒冷。泰山现代年均气温、降水量与天山、长白山、崂山等地区气候现状进行比较,推测末次冰期时,泰山山顶顶年均温为-11.3～-4.3℃,古气候表现为气候寒冷、降水丰富的冷湿气候特征。

Sediment samples were collected from the south slope of the Taishan Mountain for age dating and pollen studies in order to define the paleo-climate pattern during the last glacial period of the Quaternary. Dating data show that the sediments were formed 30.54＋ 2.59kaB. P, approximately during the last glacial maximum. Palynological Assemblages were dominated by the cold coniferous species of ＂Selaginella ＋ Artemisia ＋ Chenopodiaceae＂ assemblage with ＂Pinus ＋ Selaginella ＋ Artemisia＋ Chenopodiaceae＂ as the major population, indicating a cold climate. Compared the modern temperature and precipitation at the Taishan Mountain with the current climate at Tianshan, Changbai and Lao Mountains, it is inferred that the temperature at the top of Taishan Mountain could be as low as -11.3 to -4.3℃, with high rainfall during the last glacial period.