中国东部地区全新世气候演化及其与气候事件的对应性

The Holocene climatic evolution in Eastern China and its bearing on climatic events

  • 摘要: 在格陵兰GISP2冰芯气候演化曲线及北半球30°~90°N全新世气候演化综合曲线的基础上,统合了中国东部地区近年获得的全新世洞穴石笋、黄土沉积、湖泊沉积等典型气候演化曲线,建立了全新世气候节律分期,划分了11个暖期(编号W1—W11),10个冷期(编号C1—C10)。以此为基础,首次将中国东部全新世发生的洪水、海进、海退、冰川、冰冻等各类气候事件进行对应性分析,确认了中国在全新世存在一个千年尺度的节律性气候演化特征。综合各类气候事件后显示,编号为C2、C4、C6的冷期降温幅度较大,分别对应于10、8.2、5.3 kaBP的强冷事件。编号为W5的暖期时段,对应于7.2 kaBP的大暖期。研究发现,全新世气候变化在中国东部产生了同步的陆海联动效应。

     

    Abstract: Based on the Holocene climate evolution curve constructed with the Greenland ice core GISP2 and the integrated climate curves at the latitude of 30°~90°N, as well as the climate evolutionary curves recently acquired from the Holocene cave stalagmites, loess and lake sediments, the Holocene climatic rhythm stages has been established by this paper for Eastern China, which consists of 11 warm periods (numbered W1-W11) and 10 cold periods (numbered C1-C10). Correspondingly, the analysis of Holocene climatic events, such as floods, transgressions, regressions, glaciers, freezing and other climate events in the eastern China is conducted. Evidence confirms that there is a millennium scale rhythmical climate evolution in China during the Holocene. The cooling periods numbered C2, C4 and C6 have showed the considerable cooling and may correspond to the cooling events in 10, 8.2 and 5.3 kaBP, respectively. The warming period numbered W5 is corresponding to the Megathermal around 7 kaBP. It indicates that the Holocene climate change in eastern China is obviously influenced by land-sea interactions.

     

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