Collaborative Research: Reconstructing millennial-scale trends and variability in western Pacific convection and hydrology from large lakes on Sulawesi, central Indonesia

合作研究：重建印度尼西亚中部苏拉威西岛大型湖泊西太平洋对流和水文的千年尺度趋势和变化

• 批准号: 0902845
• 负责人: James Russell
• 金额: $ 31.33万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0902845&HistoricalAwards=false
• 关键词: Collaborative; Research; Reconstructing; millennial; scale

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This grant supports research on late Pleistocene and Holocene convective and hydrologic variability in Indonesia through the recovery and analysis of new sediment cores from two large lakes on the island of Sulawesi. This research builds upon seismic reflection surveys of these lakes that document thick piles of sediment accumulating at rates ideal for paleoclimate studies, and upon geochemical and isotopic analyses of existing short cores that indicate substantial changes in regional convection and hydrology during the past ca. 400 years. This group will recover new sediment cores from these lakes, and conduct multiproxy analyses to reconstruct convective and hydrologic variability during the late Pleistocene and Holocene. This work will provide fundamentally important new insights into the history of Indonesian convection and hydrology, changes in the ITCZ, and long-term changes in tropical Pacific zonal gradients in during the late Pleistocene and Holocene.Intellectual Merits: The research is in two key areas: 1) The regional responses of coupled climate systems such as the ITCZ and ENSO during past climate changes, and 2) The regional impact of past abrupt changes in climate. Interannual variability in Indonesian rainfall and hydrology are linked to variations in ENSO. Understanding the role of long-term changes in natural modes of variability such as ENSO in abrupt climate change is a critical question, yet existing records disagree substantially on the response of western Pacific hydrology to abrupt climate changes. Records of climate from these lakes will provide fundamentally important data to evaluate centennial- to millennial-scale trends and variability in tropical western Pacific convection and hydrology, and interactions between the mean state of the tropical Pacific, the regional monsoons, and the strength and position of the ITCZ during past climate changes.Broader Impacts: The proposed research activities will provide a new record of climate variability from a densely inhabited, rapidly developing region where food production has been quantitatively linked to ENSO-driven rainfall variability. Lakes Matano and Towuti have been proposed as important sites for continental drilling to obtain long paleoenvironmental records from the tropical Pacific, and our fieldwork will provide new sediment cores and seismic reflection data to the scientific community from these scientifically valuable but understudied great lakes. The proposed research will promote interdisciplinary training and learning through involvement of undergraduate and graduate students in an effort to expand our fundamental knowledge of climate variability in an important region. The project will also enhance infrastructure for research and education by strengthening intellectual and research collaborations between the PIs, Indonesian, Canadian scientists and institutions, and industry, and through support of infrastructure at Brown University and the University of Minnesota.

该奖项是根据2009年的《美国回收与再投资法》（公法111-5）资助的。这笔赠款支持对印度尼西亚晚期更新世和全新世对流的研究，通过从两个大湖泊中恢复和分析新的沉积物核心，以及印度尼西亚的水文变异性。苏拉威西岛。这项研究基于对这些湖泊的地震反射调查，这些湖泊记录了成堆的厚堆积，以古气候研究的理想汇率积累，以及对现有短核的地球化学和同位素分析，这些核心表明在过去的CA中表明区域对流和水文学的重大变化。 400年。该小组将从这些湖泊中回收新的沉积物核心，并进行多氧分析，以重建更新世和全新世晚期的对流和水文变异性。这项工作将在根本上为印尼对流和水文学的历史，ITCZ的变化以及热带太平洋地区梯度的长期变化提供根本重要的新见解，而在更新世后期和全新世期间的长期变化。 ：1）在过去的气候变化中，耦合气候系统（例如ITCZ和ENSO）的区域反应，以及2）过去气候突然变化的区域影响。印尼降雨和水文学的年际变化与ENSO的变化有关。了解长期变化在自然变异模式中的作用，例如ENSO在突然的气候变化中是一个关键问题，但现有记录在西太平洋水文学对突然气候变化的反应上大大不同意。来自这些湖泊的气候记录将提供重要的数据，以评估热带西部太平洋对流和水文学的百年纪念至千年级趋势和可变性，以及热带太平洋，区域季风的平均状态以及强度和位置的平均状态之间的相互作用Broader的影响：拟议的研究活动将提供新的记录，从一个密集地居住，迅速发展的地区提供了新的记录，这些研究活动将为粮食生产与ENSO驱动的降雨差异有定量联系。已经提出了湖泊Matano和Towuti作为大陆钻探的重要地点，以从热带太平洋地区获得长期的古环境记录，我们的实地调查将向科学界提供新的沉积物核心和地震反射数据，从这些科学有价值的群众向科学界提供。拟议的研究将通过参与本科和研究生的参与来促进跨学科的培训和学习，以扩大我们对重要地区气候变异性的基本知识。该项目还将通过加强PIS，印尼，加拿大科学家和机构以及行业之间的智力和研究合作，并通过支持布朗大学和明尼苏达大学的基础设施来增强研究和教育的基础设施。