摘要
在中国东部连续的尘土孢粉样基础上,用转换函数的方法研究中国东部孢粉与气候的定量关系。研究结果证明,中国东部现代花粉的分布与年均温有密切关系,某些草本植物花粉之间的含量变化很大程度上与太阳辐射量和不同纬度的温度变化有关。因此定量重建古植被带的迁移及古气候的变化就成为可能。通过对比,选择Artemisia与Poaceae的比值作为温度替代指标。Arte/Poac与纬度相关系数的平方值(R^2)为0.9579,它与年均温的相关系数平方值也达到0.9162。用回归方程定量重建了中国东部海域钻孔DGKS-9602的古气候,由于末次盛冰期草本植物花粉丰富,获得的气候值可信度最好,即年均温比现代降低了8℃左右(6—10℃),植被带向南推移了约8—10纬度,这一结果与前人的研究结果基本吻合。
The large-scale data set of dust pollen samples covers the tropical-temperate climate transition area of eastern China. The results show that some ratios of pollen taxa have close relation with latitude and likely with climate. The present study discovers an interesting relation between the ratio of Artemisia/Poaceae and the latitude. The R2 value of Arte/Poac for latitude is as high as 0.9579, and for the mean annual temperature >0.9162. The paper attempts to reconstruct the paleoclimate of LGM for a core in the East China Sea by means of regression equation. The estimated mean annual temperature at LGM was about 8℃ (6-10℃) lower than today and the vegetation zone shifted southward by about 8-10 latitude degrees.
出处
《古生物学报》
CAS
CSCD
北大核心
2002年第4期508-516,共9页
Acta Palaeontologica Sinica
