Abrupt Climatic Changes during the Last Glaciation Based on Pollen Analysis of the Abric Romani, Catalonia, Spain
Abrupt Climatic Changes during the Last Glaciation Based on Pollen Analysis of the Abric Romani, Catalonia, Spain
复制标题
基于西班牙加泰罗尼亚阿布里克罗姆人花粉分析的末次冰期气候突变
DOI：
10.1006/qres.1994.1081
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发表时间：
1994
影响因子：
2.3
通讯作者：
R. Juliá
中科院分区：
文献类型：
--
作者：
F. Burjachs;R. Juliá
摘要Abric Romani大陆孢粉记录提供了末次冰期气候突变的证据。花粉记录揭示了一种类似于冰芯的高频变化模式，如氧同位素或尘埃含量所显示的。对14个钙华样品的分析得出了一致的U系列年龄，其地层顺序正确，范围从40,000到70,000年。根据植被组成和结构的变化，划分出5个古气候阶段，最古老的阶段为70,200~65,500年前，记录了与同位素阶段5的最后一次暖事件相对应的嗜热类群；第二阶段，从65,500~56,800年，记录了与同位素阶段4相关的冷湿气候；第四阶段，从49,500到46,200年，记录了寒冷，干燥的气候。第五阶段，从46,200到40,800年，记录了一个在外观上类似于全新世开始的较温和的阶段。
Abstract The Abric Romani continental pollen record provides evidence of abrupt climate variations during the last glaciation. The pollen record reveals a pattern of high-frequency variations similar to that in ice cores as shown by oxygen isotopes or dust content. Analyses of 14 travertine samples yield coherent U-series ages in correct stratigraphic order, ranging from 40,000 to 70,000 yr. According to changes in the composition and structure of the vegetation, five paleoclimatic phases have been differentiated; the oldest, ranging from 70,200 to 65,500 yr ago, records thermophilous taxa which correspond to the last warm events of isotopic stage 5. The next phase, from 65,500 to 56,800 yr, records a cold, humid climate that correlates with isotope stage 4. During the third phase, from 56,800 to 49,500 yr, relatively warm and cold events alternate. The fourth phase, from 49,500 to 46,200 yr, records a cold, dry climate. The fifth phase, ranging from 46,200 to 40,800 yr, records a milder phase that is similar in appearance to the beginning of the Holocene.