A detailed comparison of Asian Monsoon intensity and Greenland temperature during the Allerod and Younger Dryas events
A detailed comparison of Asian Monsoon intensity and Greenland temperature during the Allerod and Younger Dryas events
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阿勒罗德和新仙女木事件期间亚洲季风强度和格陵兰温度的详细比较
DOI：
10.1016/j.epsl.2008.06.008
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发表时间：
2008-08-15
影响因子：
5.3
通讯作者：
Chen, Shitao
中科院分区：
文献类型：
--
作者：
Liu, Dianbing;Wang, Yongjin;Chen, Shitao
通过对湖北青田洞石笋氧同位素的年层计数和Th-230定年记录，研究了从Allerod到Younger Dryas（YD）过渡期的亚洲季风（AM）历史，平均分辨率为2.5年。季节性三角洲O-18剖面表明，方解石三角洲O-18是一个敏感的代理AM的变化，从中国东部的青田和其他洞穴记录之间的密切相似性表明，大规模的区域一致性季风降水三角洲O-18的变化与温度变化在高纬度地区。U-Th年龄不确定性小于100年的年度解决年表定义的时间，持续时间和早期Allerod，内Allerod冷期（IACP）的过渡。已故的阿勒罗德和青年节的开始160年长的IACP，有两次短暂的逆转，在5 '80和椎板厚度记录中都清楚地显示出来。早期和晚期Allerod，由IACP分开，其特征是几个十年到百年的三角洲O-18变化周期，每个周期都被子周期打断。这些年代际到百年季风变化与格陵兰岛的温度变化相关，支持模式模拟，年代际北大西洋涛动（NAO）和北太平洋涛动（NPO）耦合通过大气环流在冰川边界条件下，可能会影响热带/亚热带季风变化。然而，晚Allerod和YD之间的季风转变持续了380年，比类似的格陵兰温度转变至少长130年[Stuiver，M.，格罗茨，下午，GISP 2氧同位素比值。季铵抗生第53（2000）277-284号决议]。这意味着除了格陵兰和AM之间的直接联系之外，还有其他联系，现在已经有很好的记录。一种可能性是南半球气候通过越赤道气流的影响[An，Z.S.，东亚古季风气候的历史和变化。季铵抗生Sci. Rev. 19（2000）171-187]。(c)2008 Elsevier B. V.保留所有权利。
An annual layer-counted and Th-230-dated stalagmite oxygen isotope record from Qingtian Cave in Hubei province, central China, provides an Asian Monsoon (AM) history across the Allerod to Younger Dryas (YD) transition, with an average 2.5-year resolution. Seasonal delta O-18 profiles indicate that the calcite delta O-18 is a sensitive proxy for AM changes, and the close similarity between the Qingtian and other cave records from eastern China suggests a large-scale regional coherence of monsoonal precipitation delta O-18 variations associated with the temperature changes in high-northern latitudes. The annually-resolved chronology with a U-Th age uncertainty of less than 100 yr defines the timing, duration and transition of the early Allerod, the intra-Allerod cold period (IACP). the late Allerod, and the start of the YD. The 160-yr-long IACP, with two brief reversals, is clearly shown in both 5'80 and lamina thickness records. The early and late Allerod, separated by the IACP, are characterized by several decadal to centennial cycles of delta O-18 variations, each punctuated by sub-cycles. These decadal to centennial monsoon variations correlate with the Greenland temperature changes, supporting a model simulation that the decadal North Atlantic Oscillation (NAO) and North Pacific Oscillation (NPO) are coupled via atmospheric circulation under glacial boundary conditions, perhaps affecting tropical/subtropical monsoon changes. However, the monsoon transition between the late Allerod and YD lasted 380 yr, longer than the analogous Greenland temperature shift by at least 130 yr [Stuiver, M., Grootes, P.M., GISP2 oxygen isotope ratios. Quat. Res. 53 (2000) 277-284]. This implicates other links besides the direct link between Greenland and the AM, which is now well documented. One possibility is the influence by Southern Hemisphere climate via cross-equatorial air flow [An, Z.S., The history and variability of the East Asian paleomonsoon climate. Quat. Sci. Rev. 19 (2000) 171-187]. (c) 2008 Elsevier B.V. All rights reserved.