Multi-decadal to centennial-scale development of the Indonesian-Australian summer monsoon over the last 6,000 years

过去6000年印尼-澳大利亚夏季风的数十年至百年规模的发展

• 批准号: 147314530
• 负责人: Professor Dr. Stephan Steinke
• 金额: --
• 依托单位: State Key Laboratory of Marine Environmental Science
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/147314530?language=en
• 关键词: Multi; decadal; centennial; scale; development

The monsoon system is the main determinant of environmental conditions over much of Asia, and so affects the most densely populated region on Earth. Understanding how the monsoon has evolved in the recent geologic past is crucial to predictions of how it may change in the future, for example under the influence of climate change, especially global warming. Most proxy evidence on multi-decadal to centennial scale changes in summer monsoon intensity during the Holocene has been deduced from continental and marine archives located in the Indian and East Asian monsoon domains. Up to now, very little is known about the development of the Indonesian-Australian monsoon during the Late Holocene. This project intends to investigate the Indonesian-Australian monsoon (IAM) on multi-decadal to centennial time-scales in order to test hypotheses about (a) a summer IAM weakening after 3,000 years before present and (b) an asynchronous development of the IAM and its northern hemisphere counterparts during the Middle to Late Holocene. To this end, two sediment cores recovered from the eastern Lombok Basin off NW Sumba Island (Indonesia) will be analysed for planktonic foraminiferal faunal assemblage and Mg/Cabased sea surface temperatures (SST). Located in the modern summer monsoon induced upwelling area off NW Sumba Island, both cores are considered as very sensitive archives of past changes in upwelling intensity as a recorder of the summer IAM activity.

季风系统是亚洲大部分地区环境状况的主要决定因素，因此影响到地球上人口最稠密的地区。了解季风在最近的地质历史中是如何演变的，对于预测它未来可能如何变化至关重要，例如在气候变化，特别是全球变暖的影响下。关于全新世夏季风强度几十年至百年尺度变化的大多数代理证据来自位于印度和东亚季风域的大陆和海洋档案。到目前为止，人们对全新世晚期印尼-澳大利亚季风的发展知之甚少。本项目打算在几十年至百年的时间尺度上调查印度尼西亚-澳大利亚季风(IAM)，以检验关于以下假设：(A)夏季IAM在距今3000年后减弱，以及(B)IAM与北半球对应的季风在中全新世至晚全新世期间不同步发展。为此目的，将分析从印度尼西亚松巴岛西北部龙目岛盆地东部回收的两个沉积岩芯的浮游有孔虫动物群组合和镁/海底海面温度。这两个岩芯位于现代夏季风引起的松巴岛西北部上升流区，作为夏季IAM活动的记录器，被认为是过去上升流强度变化的非常敏感的记录。

项目成果

Impact of abrupt climate change in the tropical southeast Atlantic during Marine Isotope Stage (MIS) 3

• DOI: 10.1029/2011pa002118
• 发表时间: 2011-12
• 期刊: Paleoceanography
• 作者: I. Hessler;S. Steinke;J. Groeneveld;L. Dupont;G. Wefer

Reconstructing the southern South China Sea upper water column structure since the Last Glacial Maximum: Implications for the East Asian winter monsoon development

• DOI: 10.1029/2009pa001850
• 发表时间: 2010-06
• 期刊: Paleoceanography
• 作者: S. Steinke;M. Mohtadi;J. Groeneveld;Li-Chuan Lin;L. Löwemark;Min‐Te Chen;R. Rendle-Buehring