IODP Exp 346: Onset and evolution of millennial-scale variability of the Asian monsoon (sailing participation)

IODP Exp 346：亚洲季风千禧年尺度变化的开始和演变（航行参与）

• 批准号: NE/L002655/1
• 负责人: Andrew Henderson
• 金额: $ 1.53万
• 依托单位: Newcastle University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2013
• 资助国家: 英国
• 起止时间: 2013 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FL002655%2F1
• 关键词: IODP; Exp; 346; Onset; evolution

The Asian monsoon is the most convectively active atmospheric circulation system on Earth, and its seasonal rains impact about half the world's people. The timing and distribution of modern monsoon rainfall is relatively well documented, but past spatio-temporal patterns of changes in the Asian monsoon are poorly constrained. Recent evidence suggests the East Asian and Indian summer monsoons have varied significantly in concert with Dansgaard-Oescgher (D-O) cycles. These cycles have global resonance as they appear to be coupled between northern and southern hemispheres via complex interactions between the atmosphere, ocean, cyrosphere and biosphere. During a typical D-O cycle, slow cooling in the North Atlantic is terminated abruptly by rapid warming that recurs at a millennial-scale pacing. Assembling a comprehensive picture of Earth's climate response during D-O cycles is essential to understanding how abrupt warming events are amplified and propagated through the climate system. Ultimately this is important because the rate of temperature increase during a D-O cycle in northern high latitudes is comparable to rates of warming projected for the coming decades. The Himalaya and Tibetan Plateau (HTP), one of the most topographically imposing features on Earth, plays a key role in determining the strength of the Asian monsoon. In addition, the size of the HTP forms an obstacle that blocks low-level Westerly Jet circulation (WJC). Geological records have implicated the uplift of the Tibetan Plateau, starting c. 50 Myr ago, in enhanced continental aridity, late Cenozoic cooling, intensification of the Asian summer and winter monsoon, and even perhaps causing increased weathering and drawdown of atmospheric CO2. Furthermore, it has been proposed that the renewed uplift and extension of the HTP at c. 3.6 Ma acted as a trigger for the onset of D-O-type climatic variability. The coherence between monsoon variability and D-O cycles is therefore thought to be a consequence of renewed HTP uplift during the Plio-Pleistocene, creating two discrete modes of WSC. The emergence of these two modes of atmospheric circulation also provides a potential teleconnection to D-O events documented in the North Atlantic. Integrated Ocean Drilling Program (IODP) expedition 346 proposes to core and log seven sites covering a wide latitudinal range from the Japan Sea to the northern East China Sea to test the hypothesis that Plio-Pleistocene uplift of the HTP, and the consequent emergence of two discrete modes of WJC, caused the amplification of millennial-scale variability in the East Asian summer (EASM) and winter (EAWM) monsoons. IODP 346 aims to recover cores that will provide the geological evidence that (1) monitors past behaviours in the WJC, EASM, EAWM and the Tsushima Warm Current; (2) reconstructs the behaviour of the sub-Polar Front and ice-rafted debris, and (3) understands the ventilation history of the Japan Sea and its link to the influx of freshwater through the Tsushima Strait and winter cooling.

亚洲季风是地球上对流最活跃的大气环流系统，其季节性降雨影响着世界上大约一半的人口。现代季风降雨的时间和分布有相对详细的记录，但亚洲季风过去的时空变化模式却很少受到限制。最近的证据表明，东亚和印度夏季季风与 Dansgaard-Oescgher (D-O) 周期一致存在显着变化。这些循环具有全球性的共鸣，因为它们似乎通过大气、海洋、冰冻圈和生物圈之间复杂的相互作用在北半球和南半球之间耦合。在典型的 D-O 循环中，北大西洋的缓慢冷却因以千禧年规模的速度反复出现的快速变暖而突然终止。绘制 D-O 周期期间地球气候响应的全面图景对于了解突然变暖事件如何通过气候系统放大和传播至关重要。归根结底，这一点很重要，因为北部高纬度地区 D-O 循环期间的温度升高速度与预计的未来几十年的变暖速度相当。喜马拉雅山和青藏高原（HTP）是地球上最壮观的地形之一，在决定亚洲季风的强度方面发挥着关键作用。此外，HTP的规模也成为阻碍低空西风急流环流（WJC）的障碍。地质记录表明青藏高原自公元1世纪开始隆起。 50 密尔前，大陆干旱加剧，新生代晚期变冷，亚洲夏季和冬季季风加剧，甚至可能导致风化加剧和大气二氧化碳浓度下降。此外，有人建议重新提升和扩展 HTP 的 c。 3.6 Ma 引发了 D-O 型气候变率的发生。因此，季风变化和 D-O 循环之间的一致性被认为是上更新世期间 HTP 重新抬升的结果，从而产生了两种离散的 WSC 模式。这两种大气环流模式的出现也为北大西洋记录的 D-O 事件提供了潜在的遥相关。综合海洋钻探计划（IODP）第346号探险队提议对覆盖从日本海到东海北部广阔纬度范围的七个地点进行取芯和测井，以检验这样的假设：上里奥-更新世HTP的抬升以及随后出现的两种离散模式的WJC导致东亚夏季（EASM）和冬季（EAWM）千年尺度变化的放大 季风。 IODP 346 旨在回收岩心，提供以下地质证据：(1) 监测 WJC、EASM、EAWM 和对马暖流过去的行为； (2) 重建副极地锋和冰筏碎片的行为，(3) 了解日本海的通风历史及其与通过对马海峡淡水流入和冬季降温的联系。

项目成果

Palaeoceanography of the Japan Sea Across the Mid‐Pleistocene Transition: Insights From IODP Exp. 346, Site U1427

• DOI: 10.1029/2021pa004236
• 发表时间: 2021-12
• 期刊: Paleoceanography and Paleoclimatology
• 影响因子: 3.5
• 作者: Sonja Felder;T. Sagawa;M. Greaves;M. Leng;K. Ikehara;K. Kimoto;Siro Hasegawa;T. Wagner;A. Henderson

Proceedings of the International Ocean Drilling Program Volume 346 Expedition Reports Asian Monsoon

国际海洋钻探计划论文集第346卷亚洲季风考察报告

• 发表时间: 2015
• 作者: Tada R

High-resolution and high-precision correlation of dark and light layers in the Quaternary hemipelagic sediments of the Japan Sea recovered during IODP Expedition 346

• DOI: 10.1186/s40645-018-0167-8
• 发表时间: 2018-12
• 期刊: Progress in Earth and Planetary Science
• 影响因子: 3.9
• 作者: R. Tada;T. Irino;K. Ikehara;A. Karasuda;S. Sugisaki;C. Xuan;T. Sagawa;T. Itaki;Y. Kubota;Song Lu;A. Seki;R. Murray;C. Alvarez‐Zarikian;W. Anderson;M. Bassetti;Bobbi J. Brace;S. Clemens;Marcio H. da Costa Gurgel;G. Dickens;A. Dunlea;S. Gallagher;L. Giosan;A. Henderson;A. Holbourn;C. Kinsley;Gwang-Soo Lee;K. Lee;J. Lofi;C. Lopes;M. Saavedra‐Pellitero;L. Peterson;R. K. Singh;S. Toucanne;S. Wan;Hongbo Zheng;M. Ziegler

Marine and terrestrial biomarker data from the Japan/East Sea: first Neogene insights from IODP Expedition 346 and ODP Leg 127/128

来自日本/东海的海洋和陆地生物标志物数据：来自 IODP Expedition 346 和 ODP Leg 127/128 的第一个新近纪见解

• 发表时间: 2014
• 作者: Wittkoop F

East Asian Monsoon History and Paleoceanography of the Japan Sea Over the Last 460,000 Years

• DOI: 10.1029/2018pa003331
• 发表时间: 2018-07
• 期刊: Paleoceanography and Paleoclimatology
• 影响因子: 3.5
• 作者: S. Gallagher;T. Sagawa;A. Henderson;M. Saavedra‐Pellitero;D. De Vleeschouwer;H. Black;T. Itaki;S. Toucanne;M. Bassetti;S. Clemens;W. Anderson;C. Alvarez‐Zarikian;R. Tada