晚更新世晚期冰期鼎盛时期华南沿海地区的古环境*

本文讨论末次冰期鼎盛时期华南沿海地区的古环境特征。对有关单位近年调查成果的分析,估计当时该地区的冬季温度比今低11-15℃,2月海洋表层水温此今低4.6-2.2℃,珠江三角洲地区河流深切达-40-62m以下,古海岸线推移到今水深150m左右深处。达主要是冰期世界气候寒冷,海面大幅度下降,东亚冬季风强盛、南海北部东北季风漂流增强的结果。

THE PALEOENVIRONMENT OF THE COASTAL REGION, SOUTH CHINA DURING THE LAST GLACIAL MAXIMUM OF LATE PLEISTOCENE

In this paper,mainly based on the studies for some time past,the authors summarized the paleoenvironmental features of the coastal region of South China during the full-glacial period of Late Pleistocene.They estimated the difference in the environment conditions between modern a.d LGM as follows.(1) On the average,the winter temperature of the land was lowered 11-15℃ or so.(2) The paleochannel bottom reached a depth of -62m or so at the present debouch of the Zhujiang delta,(3) The paleo-coastline was situated at 150m or so below the present sea-level.(4) The February temperature of the upper water in the northern part of South China Sea was lowered about 4.6-2.2℃ The above-mentioned features resulted from increasing of winter monsoon in the coastal region of South China and from increasing of north-east monsoon drift in the northern part of South Chins Sea during the last glacial maximum of Late Pleistocene