In the Northern Hemisphere, the Younger Dryas cooling occurred between 12.8 and 11.7 ka bp. This cooling is thought to have been the result of an abrupt change in atmospheric and oceanic circulations. One of the hypotheses explaining such a change suggests that just before the onset of the Younger Dryas cooling, multiple airbursts/impacts occurred over the Northern Hemisphere. We studied the late Pleistocene sediments from the Netherlands and Belgium to check whether a sudden short event might have taken place just before the onset of the Younger Dryas cooling. The geochemical features revealed suggest that such events might have occurred. The presence of products of biomass burning is suggested on the basis of trace element features of sediments from the lower Younger Dryas boundary. The presence of a volcanic component and a component resulting from extensive biomass burning in the sediments of c. 12.9 ka bp are indicated on the basis of trace element features. The volcanic component may be related to the Laacher See volcano eruption, whereas the cause of the extensive biomass burning remains unclear.

中文翻译：

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荷兰和比利时沿AllerØD-YungerDryas边界的沉积物中微量元素的分布及其意义

在北半球，年轻的树蛙的降温发生在12.8和11.7 ka bp之间。人们认为这种冷却是大气和海洋环流突然变化的结果。解释这种变化的一种假设表明，就在年轻的树蛙降温开始之前，北半球发生了多次爆炸/撞击。我们研究了来自荷兰和比利时的晚更新世沉积物，以检查是否在Younger Dryas降温开始之前发生了短暂的短暂事件。揭示的地球化学特征表明可能发生了此类事件。根据年轻的得里亚斯下界边界沉积物的微量元素特征，建议存在生物质燃烧产物。火山岩成分的存在以及由c沉积物中大量生物质燃烧产生的成分。根据微量元素特征指示出12.9 ka bp。火山成分可能与Laacher See火山喷发有关，而生物质大量燃烧的原因尚不清楚。