Reconciliation of hydroclimate sequences from the Chinese Loess Plateau and low-latitude East Asian Summer Monsoon regions over the past 14,500 years
Reconciliation of hydroclimate sequences from the Chinese Loess Plateau and low-latitude East Asian Summer Monsoon regions over the past 14,500 years
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过去14500年中国黄土高原与低纬度东亚夏季风区水文气候序列的校正
DOI：
10.1016/j.palaeo.2015.06.013
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发表时间：
2015-10-01
影响因子：
3
通讯作者：
Jiang, Xiuyang
中科院分区：
文献类型：
--
作者：
Dong, Jinguo;Shen, Chuan-Chou;Jiang, Xiuyang
本文讨论了黄土高原莲花洞8180根石笋记录的年际-年代际分辨率，以阐明东亚夏季风地区近14500年来（ka BP，1950 CE之前）的降水历史，并重新评估了中国北方地区代用品推断的古气候时间序列的不一致性。莲花O-18石笋三角洲与中国中南部其它洞穴的一致性表明，末次冰期后中国大陆的区域气候变化是同步的，表明太阳辐射是控制亚洲夏季风演变的主要因素。石笋O-18的富集度在新仙女木时期为千分之2.5，在新仙女木时期为千分之1.7。82 ka BP事件期间莲花洞穴的古生物量大于中南地区的古生物量。证据表明，在这两次突发事件中，弱降水条件在ASM领域发生了不同的纬向响应，在北方高纬强迫驱动。根据不同的自然档案推断的中国北方水文气候序列的异质性很可能归因于地层的复杂性和/或一些年代学的不确定性。(C)2015 Elsevier B. V.版权所有。
We discuss replicated stalagmite 8180 records with interannual-to-multidecadal resolution from Lianhua Cave on the Chinese Loess Plateau to illustrate the precipitation history of the East Asian Summer Monsoon (EASM) region over the last 14.5 thousand years (ka BP, before 1950 CE, hereafter), and to re-evaluate the inconsistency in the proxy-inferred palaeoclimate time series in northern China. Agreement between the stalagmite delta O-18 from Lianhua and other caves from central-southern China indicates that regional climate changes after the Last Glacial were concurrent across mainland China, indicating that insolation was the primary factor controlling the evolution of the Asian Summer Monsoon (ASM). The stalagmite O-18 enrichment of 2.5 parts per thousand in the Younger Dryas and 1.7 parts per thousand. during the 82-ka BP event in Lianhua were larger than those in caves from central and southern China. The evidence suggests that different meridional responses of weak precipitation conditions in the ASM realm occurred during these two abrupt events, driven by high-latitude forcing in the Northern Hemisphere. The heterogeneous hydroclimate sequences in northern China inferred from different natural archives are most likely attributable to the complexity of the formations and/or some chronological uncertainty. (C) 2015 Elsevier B.V. All rights reserved.