【摘要】 岱海湖相沉积物很好记录了近万年来区域气候变化的相关信息。利用马尔科夫链模型对岱海孢粉组合反映的气温和降水数据进行的周期性分析表明:该地区气候变化存在大约60 a8、0 a、180 a、400 a9、00 a等周期;周期变化与利用深水区沉积物、孢粉等研究结论以及相关地区的气候变化周期相一致,证明了马尔科夫链模型是研究环境变化周期性可利用的方法之一;在短时间尺度上,岱海地区气候变化与太阳活动和火山地震活动的周期存在相关性,太阳活动是该地区气候变化的主要驱动力之一,火山地震等因素对气候变化有一定的影响。更多还原

【Abstract】 Daihai is an enclosed inland basin,which is located in the southern edge of Inner Mongolia Plateau.The lacustrine sediments in the basin has better recorded the regional climate change information in recent about 10 ka.The periodicity analysis on the data of air temperature and precipitation obtained from the pollen assemblage analysis by means of Markov Chain Model shows that the climate change has some relatively stable periods such as 60 a,80 a,180 a,400 a and 900 a,and so on.The periodicity is consistent with other research results by means of sediment in deeper water area and pollen analysis,also is consistent with the research results in other relative regions,which shows Markov Chain Model is one of available methods to study the periodicity of environmental change.In short time scale,there are relativities between Daihai regional climate change and solar activities,and volcanic earthquake activities,from which it is known that the solar activities is one of main driving forces to cause climate change,earthquakes and volcano eruptions also impact on the periodicity of climate change to a certain extent.更多还原