History of moisture change indicated by aeolian deposit in the Horqin sandy land, Northeastern China since the Last Glacial Maximum
History of moisture change indicated by aeolian deposit in the Horqin sandy land, Northeastern China since the Last Glacial Maximum
复制标题
末次盛冰期以来东北科尔沁沙地风积指示的水分变化历史
DOI：
10.1016/j.quaint.2019.12.022
复制
发表时间：
2020-05
影响因子：
2.2
通讯作者：
Liu ZY
中科院分区：
文献类型：
--
作者：
Xue WP;Jin HL;Liu B;Sun LY;Liu ZY
科尔沁桑迪位于中国东北季风边界，对亚洲季风的变化十分敏感。该地区的风成砂-古土壤序列，特别是末次盛冰期以来的风成砂-古土壤序列，保存了该地区湿度变化历史的宝贵地质档案。然而，现有的研究对当地的湿度节律还不足以达成共识。在较深入的研究的强迫机制，我们提出了一个系统的光释光（OSL）年代学和详细的粒度，地球化学元素，磁化率和有机质的多指标分析，因为末次盛冰期的结果。结果表明，从末次盛冰期到中全新世，湿度逐渐增加，在约9 - 3 ka左右达到最佳湿度，尽管在约6 - 5 ka期间发生了强烈的振荡。这与中国东北地区其他古环境记录基本一致。结果表明，该地区的湿度变化基本上受太阳驱动的季风降水控制，是最主要的水汽来源。大气-太平洋系统的耦合以及西风带都可能干扰了季风降水，从而间接影响了桑迪的湿度。在全新世晚期，人类活动对沙丘的重新活化也起到了重要作用。
The Horqin Sandy Land, located in the monsoonal boundary of Northeastern China is sensitive to the vicissitudes of the Asian Monsoon (AM). The aeolian sand-paleosol sequences in this area, especially since the Last Glacial Maximum (LGM), have preserved valuable geological archives indicating the history of humidity changes in the region. However, existing studies on the local humidity rhythms have not been sufficient to reach a consensus. In a relatively in-depth study of the forcing mechanism, we present the results of a systematic optically stimulated luminescence (OSL) chronology and detailed multi-proxy analyses of the grain-size, geochemical elements, magnetic susceptibility, and organic matter since the LGM. The results demonstrate that the humidity gradually increased from the LGM to the middle Holocene, reaching optimum humidity around ~9−3 ka, despite intense oscillations occurring during ~6−5 ka. That is largely consistent with other paleoenvironmental records from NE China. It is suggested that the variation in the humidity is basically controlled by the solar-driven monsoonal precipitation, which is the most dominant moisture source. The coupled atmosphere−Pacific Ocean system and the westerlies could have both disturbed the monsoon precipitation, thus indirectly affecting the humidity of the sandy land. During the late Holocene, human occupation also played a significant role in the re-activation of dunes.
登录
查看更多内容
影响因子：
3.9
作者：
H. Vital;K. Stattegger
通讯作者：
H. Vital;K. Stattegger
华北沙丘和黄土高原晚第四纪地表过程对气候变化的响应
影响因子：
3.3
作者：
Huayu Lu;Joseph A. Mason;Thomas Stevens;Yali Zhou;Shuangwen Yi1;Xiaodong Miao
通讯作者：
Xiaodong Miao
半干旱河流平原源边沙丘活跃起源与发展模型——以西辽河平原为例
影响因子：
3.9
作者：
通讯作者：
--
DOI：
10.1016/j.palaeo.2009.12.005
发表时间：
2010-02
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
M. Qiang;Fahu Chen;Zhen-Ting Wang;Guang-ming Niu;Lei Song
通讯作者：
M. Qiang;Fahu Chen;Zhen-Ting Wang;Guang-ming Niu;Lei Song
影响因子：
--
作者：
Yuanjun Guo;Bao-sheng Li;Xiaohao Wen;Fengnian Wang;Dongfeng Niu;Y. Shi;Yihua Guo;Shuping Jiang-Shuping-J
通讯作者：
Yuanjun Guo;Bao-sheng Li;Xiaohao Wen;Fengnian Wang;Dongfeng Niu;Y. Shi;Yihua Guo;Shuping Jiang-Shuping-J