与全新世海面变化相比,内陆封闭湖泊沉积在气候变化研究中更具有优势。对安固里淖和泊江海子两个湖泊的钻孔剖面进行了沉积学分析,结果表明:8400 a BP以来,研究区经历了全新世大暖期的增温阶段(8400~7300 a BP)、鼎盛阶段(7300~6200 a BP)、气候波动阶段(5500~5000 a BP)、亚稳定湿润阶段(5000~3000 a BP)和降温阶段(3000 a BP至今),这与全国其他地区的环境演变过程基本一致;270 a BP(1680 A.D.)以来,研究区气候略向湿润方向转化;本世纪50年代以来,又向干旱化方向发展。
Sedimentological analyses of core sections of the Angulinao and Bojianghaizi Lakes show that the climates of these lakes have experienced several stages during the Megathermal of Holocene:warming during 8.4~7.3 ka BP, stable during 7.3~6.2 ka BP, fluctuation during 5.5~5.0 ka BP, sub stable humid during 5.0~3.0 ka BP and cooling down from 3.0 ka BP to present. The climatic changes in this region coincide with those in other regions of China. In 270 a BP, the climates turned to humid slightly, but since 1950 A.D., the climate becomes drying. Compared with sealevel fluctuation, the sediments in inland closed lakes have more advantages in studying climate change.
. THE MIDDLE AND LATE HOLOCENELACUSTRINE SEDIMENTS AND ITS CLIMATE SIGNIFICANCE OF
ANGULINAO-BOJIANGHAIZI LAKES,INNER MONGOLIA[J]. JOPC, 2000, 2(2): 84-91.