Ice rafted debris of sediment core MD95-2039

A deep-sea sediment core from the western Portuguese margin has provided a continuous, high-resolution record of millennial-scale climatic oscillations during the interval 9000-65,000 yr B.P. Pollen analysis of the same sequence allows direct, in situ assessment of the phase relationship between the North Atlantic climate system and vegetation changes on the adjacent landmass. This demonstrates for the first time that variability in NW Iberian tree population size closely tracked millennial-scale climate variability.

取自葡萄牙西部陆缘的深海沉积物岩芯（deep-sea sediment core），为距今9000至65000年时段内的千年尺度气候振荡提供了连续且高分辨率的记录。对该岩芯序列开展的孢粉分析（pollen analysis），可直接原位评估北大西洋气候系统与邻近陆块植被变化之间的相位关系。本研究首次证实，伊比利亚西北部树木种群规模的变化与千年尺度气候波动高度同步。