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研究了青藏高原冰芯与极地冰芯记录在轨道、亚轨道时间尺度上的气候变化特征及可能原因.在青藏高原冰芯记录中,轨道时间尺度上的气候变化基本超前于极地,说明在以轨道变化驱动为起因的气候变化中,青藏高原的变化(或反应)比极地来得更快,太阳辐射变化是控制轨道时间尺度上的气候变化的主要因子.但在亚轨道时间尺度上的许多气候变化,青藏高原滞后于北极地区.如Younger Dryas和Heinrich事件,都是格陵兰冰芯记录的变冷早于古里雅冰芯记录.可以认为,这些亚轨道时间尺度上的气候变化可能受劳伦冰盖的影响.因此,冰盖对某些冰期气候内的亚轨道时间尺度上的气候变化具有决定性作用.
This paper studies the climatic characteristics of the ice core and polar ice cores recorded on the orbital and sub-orbital time scales of Qinghai-Tibet Plateau and their possible reasons. In the ice core record of the Qinghai-Tibet Plateau, the climatic changes on orbital time scales are basically ahead of the polar regions, In the climate change driven by orbital change, the change (or reaction) in the Tibetan Plateau is faster than that in the polar regions, and solar radiation change is the main factor controlling the climate change on the time scale of the orbit, but in many sub-orbital time scales Changes in the Qinghai-Tibet Plateau lag in the Arctic, such as the Younger Dryas and Heinrich events, both records of the Greenland ice core cooling earlier than the records of the Guli ice core can be considered that these sub-orbital temporal climate change may be Lauren ice Therefore, the ice sheet is decisive for the climate change on sub-orbital time scales in some glacial times.