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首页> 外文期刊>Journal of quaternary science: JQS >Impact of Lateglacial cold events on the northern Aegean region reconstructed from marine and terrestrial proxy data
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Impact of Lateglacial cold events on the northern Aegean region reconstructed from marine and terrestrial proxy data

机译：利用海洋和陆地代理数据重建的晚冰川期冷事件对爱琴海北部地区的影响

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Marine palynomorph data paired with other indicators of sea-surface hydrography (planktic foraminiferal assemblages and oxygen isotopes) were used to decipher the impact of cold events on the northern Aegean region during the last glacial to interglacial transition. The data, which were derived from marine sediment cores GeoTü SL152 and GeoTü SL148, point to a strong impact of the Heinrich 1 and Younger Dryas cold events on surface-water conditions in the northern Aegean Sea. Shifts in marine palynomorph assemblages correlate with changes in terrestrial vegetation and climate (i.e. precipitation and temperature reconstructions based on pollen assemblages) in the northern borderlands of the Aegean Sea. The climate responses of the Aegean region to Heinrich event 1 (H1, ca. 17.5 to ca. 15.7cal ka BP) and Younger Dryas (ca. 12.6 to ca. 11.7cal ka BP) events appear similar in magnitude (with mean annual temperatures between ～6 and 10°C and mean annual precipitation between ～300 and ～450mm). However, the annual temperature decline during the H1 relative to the preceding already cold conditions was minor (<3°C). The transition from the relatively warm and humid local equivalent of the Aller?d interstadial to the Younger Dryas, on the other hand, witnessed an annual temperature decline of 6°C and an annual precipitation decrease of 300mm, the latter occurring abruptly within only ca. 150 a. The return to warmer conditions in the northern Aegean region after the Younger Dryas was completed at ca. 11.6cal ka BP.
机译：海洋苔藓形态数据与海面水文学的其他指标（浮游有孔虫组合和氧同位素）相结合，用于解释在最后一次冰期到冰间过渡期间冷事件对北爱琴海地区的影响。来自海洋沉积物核心GeoTüSL152和GeoTüSL148的数据表明，Heinrich 1和Younger Dryas寒冷事件对爱琴海北部的地表水条件产生了强烈影响。在爱琴海北部边界地区，海洋小孢粉组合的变化与陆地植被和气候的变化（即基于花粉组合的降水和温度重建）有关。爱琴海地区对Heinrich事件1（H1，约17.5至约15.7cal ka BP）和Younger Dryas（约12.6至约11.7cal ka BP）的气候响应在强度（年均温度）上相似。温度在〜6至10°C之间，年平均降水量在〜300至〜450mm之间）。但是，相对于先前已经寒冷的天气，H1期间的年温度下降很小（<3°C）。另一方面，从相对温暖和潮湿的Aller？d陆际等效物过渡到Younger Dryas，年温度下降6°C，年降水量下降300mm，后者仅在大约。 150个Younger Dryas于约摄氏120度完成后，爱琴海北部地区恢复温暖。 11.6cal ka BP。

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