Last glacial maximum in China: comparison between land and sea
Last glacial maximum in China: comparison between land and sea
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DOI：
10.1016/0341-8162(94)90077-9
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发表时间：
1994-12
期刊：
影响因子：
6.2
通讯作者：
Wang Pin-xian;Sun Xiangjun
中科院分区：
文献类型：
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作者：
Wang Pin-xian;Sun Xiangjun
由于末次盛冰期海平面下降（南海约100-120 m，东海约130-150 m），中国海的规模和形态发生了巨大变化。东中国海与黄海、渤海湾一起缩小为一个狭长的槽，而南中国海则成为一个半封闭的海湾。由于北太平洋极锋的南移和表层流系的重组，南海冬季气温较低6-10 ℃，季节性比现在强得多。海洋面积的减少，以及与海岸的距离的增加，再加上海面温度的下降，导致陆地干旱加剧。与冬季风增强有关的风成作用的增强使黄土沉积区扩大到中国东南部至长江以南和现代沿海。植被带大幅度向东南移动。在中国北方，沙漠和草原比现在广阔得多，现代的暖温带阔叶林地区被草原或林地占据。在中国南方，落叶阔叶林在现在被万年青森林覆盖的地区发展，季风雨林完全消失。陆地气候和海洋形态的变化改变了中国海的沉积物供给和沉积速率，形成了晚第四纪南极型CaCO 3曲线。
As a result of the sea-level drop at the last glacial maximum (about 100–120 m in the South China Sea, and 130–150 m in the East China Sea), the size and configurations of the China Seas changed greatly. The East China Sea with the Yellow Sea and Bohai Gulf was reduced into an elongated trough, while the South China Sea became a semi-enclosed gulf. Due to the southern shift of the polar front in the North Pacific and the reorganization of the surface current system, the winter temperature in the South China Sea was 6–10°C colder, and the seasonality was much stronger than it is now. The reduced sea area, and thus the increased distance to the coast, together with the declined sea surface temperature, led to intensified aridity on the land. The enhanced eolian processes related to the intensification of the winter monsoon caused an expansion of the loess deposition area reaching the southeastern part of China to the south of the Yangtze River and off the modern sea coast. Vegetation zones greatly shifted to the southeast. In north China, deserts and steppes were much more extensive than they are now and the modern areas of warm-temperate, broad-leaved forests were occupied by steppes or woodland. In south China, the deciduous, broadleaved forests were developed in areas now covered by evergreen forests, and the monsoon rain forest completely disappeared. The changes in the climate on land and the configurations of seas altered the sediment supply and sedimentation rate in the China Seas, giving rise to the Atlantic-type late Quaternary CaCO3curve there.