一万年来灵武水洞沟遗址古气候的新认识

本文通过对宁夏水洞沟遗址剖面的进一步地质调查、密集采样和孢粉分析,笔者详细地讨论了该区植被的演替,论证了全新世古气候环境的特征,总结了早、中、晚全新世在该区发育的植被及其所代表的气候环境。结果表明:早全新世植被为疏林草原、干草原→草甸草原,气候偏干冷→温和半湿润;中全新世早期植被为阔叶乔灌丛草原→针叶乔灌丛草原→阔叶疏林草原,晚期植被为疏林草原,气候相对温暖、稍凉→较温暖;晚全新世植被为干草原,气候寒冷。

New Understandings on the Paleo-climatic in Ruins of Shuidonggou Since 10 KaB.P.

With a series of geological investigation,intensive samples chosen and a large amount of spore-pollens analysis to some sections chosenfrom the ruins of Shuidonggouin Ningxia province,It was showed clearly that every sample gained more than 100 grains of spore-pollens and one of these samples even gained more than 3654 grains of spore-pollens at that time.By a careful analysis to the amount of the spore-pollens,the author explored specifically the evolution of the vegetations in this region and furthermore.It proved the characteristics of the changeable climatic environment during the period Holocene.Finally,it drew the conclusion of the vegetations grown at a time in this region and the climatic environments it represented during the ancient three stages of Early Holocene,MiddleHoloceneand Late Holocene.We had worked out quite a few pollens and spores from nineteen samples of the loess section,and plotted a concentration spore-pollens diagrams of the loess strata.The evolution of vegetation during the Holocene and the corresponding climate in time and space in the region was brought to light by an analysis of the variation of spore-pollens assemblages in this section.The results indicated that the climate in the early Holocene was colder and drier,middle Holocene was warmer and wetness,late Holocene was dry and cold.