A synthesis of monsoon exploration in the Asian marginal seas
A synthesis of monsoon exploration in the Asian marginal seas
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DOI：
10.5194/sd-31-1-2022
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发表时间：
2022-10
影响因子：
1.2
通讯作者：
P. Clift;C. Betzler;S. Clemens;B. Christensen;G. Eberli;C. France‐Lanord;S. Gallagher;A. Holbourn;W. Kuhnt;R. Murray;Y. Rosenthal;R. Tada;S. Wan
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文献类型：
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作者：
P. Clift;C. Betzler;S. Clemens;B. Christensen;G. Eberli;C. France‐Lanord;S. Gallagher;A. Holbourn;W. Kuhnt;R. Murray;Y. Rosenthal;R. Tada;S. Wan
抽象。国际海洋发现计划（IODP）在2013年至2016年期间进行了一系列考察，旨在解决亚洲和澳大利亚季风气候系统的发展问题。在恢复从阿拉伯海到日本海，向南到澳大利亚西部的新第三纪剖面方面取得了重大进展。先进活塞取样器（APC）的高采收率提供了大量半连续剖面，用于研究季风演变。在印度洋海底扇的富砂沉积物取样中，使用半长APC是成功的。记录显示，整个地区的湿度和季节性发展是历时性的，尽管大多数地区自中新世中期以来，特别是自2004年以来，可能与全球变冷有关。从C3到C4植被的过渡往往伴随着干燥，但可能更多地与全球变冷有关。西澳大利亚和中国南部可能在中新世晚期变得更加潮湿，澳大利亚季风更多地受到印度尼西亚季风的影响，而亚洲季风更多地与南亚的喜马拉雅山脉和东亚的青藏高原联系在一起。季风显示出对轨道强迫的敏感性，在北方半球冰期，许多地区的夏季季风较弱。季风越强，大陆侵蚀速度越快，但风化强度却没有变化，亚洲大陆的风化强度自中新世中期以来要么没有变化趋势，要么呈下降趋势。海洋生产力代用指标和陆地化学风化、侵蚀和植被代用指标经常出现分歧。未来的工作几乎未知的古近系是必要的，以及潜在的碳酸盐岩平台作为档案的古海洋条件。
Abstract. The International Ocean Discovery Program (IODP) conducted a series of expeditions between 2013 and 2016 that were designed to address the development of monsoon climate systems in Asia and Australia. Significant progress was made in recovering Neogene sections spanning the region from the Arabian Sea to the Sea of Japan and southward to western Australia. High recovery by advanced piston corer (APC) has provided a host of semi-continuous sections that have been used to examine monsoonal evolution. Use of the half-length APC was successful in sampling sand-rich sediment in Indian Ocean submarine fans. The records show that humidity and seasonality developed diachronously across the region, although most regions show drying since the middle Miocene and especially since ∼ 4 Ma, likely linked to global cooling. A transition from C3 to C4 vegetation often accompanied the drying but may be more linked to global cooling. Western Australia and possibly southern China diverge from the general trend in becoming wetter during the late Miocene, with the Australian monsoon being more affected by the Indonesian Throughflow, while the Asian monsoon is tied more to the rising Himalaya in South Asia and to the Tibetan Plateau in East Asia. The monsoon shows sensitivity to orbital forcing, with many regions having a weaker summer monsoon during times of northern hemispheric Glaciation. Stronger monsoons are associated with faster continental erosion but not weathering intensity, which either shows no trend or a decreasing strength since the middle Miocene in Asia. Marine productivity proxies and terrestrial chemical weathering, erosion, and vegetation proxies are often seen to diverge. Future work on the almost unknown Paleogene is needed, as well as the potential of carbonate platforms as archives of paleoceanographic conditions.