1980年，科学家首次在从尘云中沉淀下来的全球范围的沉积层中识别出这种撞击，这些尘云在撞击后围绕着地球。
Scientists first identified this impact in 1980 from the worldwide layer of sediment deposited from the dust cloud that enveloped the planet after the impact.
通过获得的高光谱数据(hyperspectral data)，科学家绘制了冰层表面硫磺沉淀的范围(红色线)。
Hyperspectral data, scientists have mapped the location of sulfur deposits on the ice surface (red outline).
随着科学家从北极运来更多的沉淀物岩心，波里·亚克及其合作者想了解更多过去冰范围的详细信息，并将此类信息在时间上进一步向后追溯。
As scientists pull more sediment cores from the Arctic, Polyak and his collaborators want to understand more details of the past ice extent and to push this knowledge further back in time.
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