新仙女木期(Younger Dryas stadial)是晚冰期的气候极冷时期,这是在末次冰期冰消过程中冰川突然短暂前进的阶段,主要表现为湖相沉积物中花粉浓度迅速下降、主要有蒿、禾草、莎草、石竹、酸模、景天、高山唐松草、虎耳草、仙女木、岩高兰、欧石南、石南、矮桦和极地柳等。
新仙女木期(橘色箭头所指处)的气温变化. 新仙女木期(Younger Dryas),是指距今12800年至11500年的一段持续1300年左右的冰期.
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The main reason of the interruption for mirabilite deposition may be transient warming events. Therefore,the rhythm deposition formation of mirabilite-silt-mirabilite indicated the periodic changes of temperature during the late glacial and the Younger Dryas.
芒硝沉积中的淤泥细线为短暂升温标志,芒硝-淤泥-芒硝的沉积韵律揭示了晚冰期和新仙女木期气候的不稳定性和温度的周期性变化。
参考来源 - 河西走廊花海剖面晚冰期以来年代学及沉积特征研究·2,447,543篇论文数据,部分数据来源于NoteExpress
有证据显示,就像今天墨西哥暖流做的那样,新仙女木期之前的洋流会将热带的温暖海水带到北极圈的海域中,热量会被推来推去。
There is evidence that currents which bring warm water from the tropics to the Arctic, as the Gulf Stream does now, can be pushed around.
Kennett博士指出,在新仙女木期之初,曾经有一个庞大的淡水湖中的淡水瞬间突破了限制它的冰山大坝,并流入北大西洋。
Dr Kennett worked on the idea that at the start of the Younger Dryas a huge lake of fresh water suddenly breached a wall of ice that had confined it, and flowed into the northern Atlantic Ocean.
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