摘要
通过对位于东亚季风区中东部与西部边缘的两个高分辨率黄土剖面记录的对比研究,发现它们不仅捕捉到了20个Dansgaard-Oeschger事件与6个Heinrich事件,而且黄土记录与GRIP冰芯记录的这些快速气候波动基本上是同步的。暗示在整个末次冰期,东亚季风气候同样存在千年—百年尺度上的快速波动。所不同的是,西面的沙沟剖面对这些快速气候波动的反应比东面的王官剖面敏感。结合末次冰期中国黄土记录的先前研究结果,我们发现,自西向东Dansgaard-Oeschger旋回的幅度逐渐变小,推测这主要是由西风与东亚夏季风共同作用所造成的。
Comparing the records of two loess profiles, which are located in mid-east and west margin of the East Asian Monsoon region, it is found that these records not only captured 20 Dansgaard-Oescher events and 6 Heinrich events, but also were basically synchronous with those of GRIP ice core in the rapid climate fluctuations. And it also suggested that the climate in the East Asian Monsoon region had rapid fluctuations in millennium to century scales in the whole last glacial. But there were still some differences between Shagou Profile ＇in west and Wangguan Profile in east, that is the former were more sensitive to climate change than the latter. With those previous studies of Chinese loess records in the last glacial, it is revealed that the magnitude of Dansgaard-Oeschger cycle decreased gradually from west to east and we suggested it was the effect of westerly and the summer monsoon combination.
出处
《沉积学报》
CAS
CSCD
北大核心
2007年第3期429-436,共8页
Acta Sedimentologica Sinica
基金
国家重点基础发展计划(批准号:2005CB422001)
国家自然科学基金(批准号:40471016
40401007)
教育部高等学校博士点科研基金(20030730017)资助
