摘要
笔者根据CK1孔孢粉研究结果,分析了银川盆地15万年以来的万年尺度和千年尺度的气候波动事件,并利用频谱分析方法得到银川盆地沉积物孢粉记录的气候变化周期。经研究认为,这种万年尺度周期变化的气候波动可与高纬度地区米兰科维奇的规道变化相对比,而千年尺度准周期可与D/O相对应。它反映银川盆地存在着万年尺度和千年尺度的气候波动事件。
On the basis of the analysis of sporopollen from well CK1 ,the authors studied the events of climatic fluctuations of 10ka and1k a scales since150ka BP and obtained the climatic change cycles from the sporo pollen records of sediments in the Yinchuan basin by the frequency spectrum ana lysis.The study indicates that the climatic cyclic fluctuations of the10ka scale may be correlated with the variations of the Earth's orbital elements in the Milankovitch theory in the high-latitude areas,while the quasi-cycle of the1ka scale corresponds to D /O.This suggests that there exist climatic flu ctuation events of 10ka and1ka scales in the Yinchuan basin.
出处
《中国地质》
CAS
CSCD
2002年第4期431-434,共4页
Geology in China
基金
原地质矿产部部控项目"银川平原农业生产基地地下水资源和环境地质综合评价"
