Dust influx reconstruction during the last 26,000 years inferred from a sedimentary leaf wax record from the Japan Sea
Dust influx reconstruction during the last 26,000 years inferred from a sedimentary leaf wax record from the Japan Sea
复制标题
DOI：
10.1016/j.gloplacha.2006.06.022
复制
发表时间：
2006-12
影响因子：
3.9
通讯作者：
Y. Yokoyama;Tatsuhiro Naruse;N. Ogawa;R. Tada;H. Kitazato;N. Ohkouchi
中科院分区：
文献类型：
--
作者：
Y. Yokoyama;Tatsuhiro Naruse;N. Ogawa;R. Tada;H. Kitazato;N. Ohkouchi
我们从日本海南部的冲岐海岭获得了过去26，000年陆地生物标志物（C29和C31正构烷烃）的高分辨率记录，使我们能够讨论千年尺度的气候变化。我们的采样分辨率的生物标志物在主要的冰消期（10-19.5 cal ka BP）是300年，元素分析（总有机碳和总氮）是一样好的约200年。在末次冰期，这些分子的估计质量积累率大大高于全新世。在17.6 cal ka BP和11.4 cal ka BP处也有两个明显的峰值，分别与Heinrich事件1和新仙女木事件的最后阶段相吻合。日本海独特的海洋学环境倾向于优先保存风成有机物质。事实上，我们的生物标志物记录的性质表明，一个强大的风成信号，因此，他们的流量到日本海可能反映了沙尘源区的气候条件和运输强度。我们的研究结果是一致的，与以前报道的季风变化的基础上，其他代理，这表明北大西洋气候和亚洲季风强度之间有很强的联系。
We obtained the high-resolution record of terrestrial biomarkers (C29and C31n-alkanes) for the last 26,000 years from Oki Ridge in the south Japan Sea that enabled us to discuss millennial scale climate changes. Our sampling resolution for the biomarker during the major deglaciation period (10–19.5 cal ka BP) is 300 years and for the elemental analyses (total organic carbon and total nitrogen) is as good as ca 200 years. The estimated mass accumulation rate of these molecules during the last glacial period is substantially higher than during the Holocene. They also exhibited two distinct peaks at 17.6 cal ka BP and 11.4 cal ka BP, which are coincident with Heinrich Event 1 and the latest stage of the Younger Dryas, respectively. The unique oceanographic setting of the Japan Sea tends to preferentially preserve organic material of aeolian origin. The nature of our biomarker record in fact suggests a strong aeolian signal, and hence their flux to the Japan Sea potentially reflects the climate conditions of the dust source regions and transport intensity. Our results are consistent with previously reported monsoon variations based on other proxies that is indicative of a strong linkage between North Atlantic climate and Asian monsoon intensity.