International Research Fellowship Program: Ocean Variability & Fish Population Response Beyond El Nino from Laminated Sediments of the Peruvian Margin Spanning the Last Millenn

国际研究奖学金计划：海洋变化

• 批准号: 0502387
• 负责人: David Field
• 金额: $ 12.1万
• 依托单位: Field, David B
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-04-01 至 2009-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0502387&HistoricalAwards=false
• 关键词: International; Research; Fellowship; Program; Ocean

0502387FieldThe International Research Fellowship Program enables U.S. scientists and engineers to conduct three to twenty-four months of research abroad. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad.This award will support a twenty-two-month research fellowship by Dr. David B. Field to work with Dr. Dimitri Gutierrez at Instituto del Mar del Peru in Callao, Peru, and Dr. Christina Ravel at the University of California, Santa Cruz. The tropical Pacific is a key component in the global climate system and has far reaching societal impacts. Paleoclimate records are needed to examine ocean variability beyond the El Nino Southern Oscillation (ENSO) timescale. Since different modes of variability have unique horizontal and vertical patterns, determining the mechanisms of change is possible through reconstructing changes in the vertical structure of the water column with planktonic and benthic foraminifera, as well as through comparison of records between different locations. Laminated sediments from the Peruvian shelf region are ideally suited to test hypotheses concerning the role of the eastern tropical Pacific (ETP) and intermediate water circulation in decadal- to-centennial-scale variability, the ecosystem response to such ocean variability, and the effects of anthropogenic activity. This proposal outlines an international effort to develop paleoceanographic time series resolving decadal-scale changes over the last 1,000 years from laminated sediments off Peru. This effort will take place at IMARPE (Instituto del Mar del Peru) in Callao, Peru in direct collaboration with Dr. Dimitri Gutierrez and other scientists from Peru, Chile, France, and Mexico. In the period of time spent at the University of California, Santa Cruz, the PIs will investigate the sources of high frequency climate variability in the Eastern tropical Pacific. Characterizing the natural modes of climate variability is essential to understanding climate and ecosystem processes, detecting anthropogenic influences, and identifying and predicting future changes and risks. The time series of this research will serve as important constraints on the role of the ETP in modifying ENSO, decadal-to-centennial climate variability, and 20th century warming. Understanding the mechanisms of change has policy implications for assessing the potential environmental and ecological risks and uncertainties associated with future natural and/or anthropogenic change.

0502387 Field国际研究奖学金计划使美国科学家和工程师能够在国外进行三到二十四个月的研究。 该计划的奖项提供了联合研究的机会，以及使用独特或互补的设施，专业知识和国外的实验条件。该奖项将支持大卫B博士为期22个月的研究奖学金。外地与迪米特里古铁雷斯博士在研究所德尔马尔德尔秘鲁在卡劳，秘鲁，和克里斯蒂娜拉威尔博士在加州大学，圣克鲁斯。热带太平洋是全球气候系统的重要组成部分，具有深远的社会影响。 古气候记录是研究厄尔尼诺南方涛动（ENSO）时间尺度以外的海洋变化所必需的。 由于不同的变化模式具有独特的水平和垂直模式，因此可以通过用浮游有孔虫和底栖有孔虫重建水柱垂直结构的变化以及通过比较不同地点的记录来确定变化机制。 来自秘鲁大陆架区域的层状沉积物非常适合于检验关于热带太平洋东部（ETP）和中层水循环在十年至百年尺度变化中的作用、生态系统对这种海洋变化的响应以及人类活动的影响的假设。这项提案概述了国际上为发展古海洋学时间序列所作的努力，以解决过去1 000年来秘鲁近海层状沉积物的十年级变化。 这项工作将在秘鲁卡劳的IMARPE（德尔马尔秘鲁海洋研究所）进行，由Dimitri Gutierrez博士和来自秘鲁、智利、法国和墨西哥的其他科学家直接合作。 在圣克鲁斯的加州大学的这段时间里，PI将调查热带太平洋东部高频气候变率的来源。确定气候变率的自然模式对于理解气候和生态系统过程、探测人为影响以及确定和预测未来的变化和风险至关重要。 这项研究的时间序列将作为重要的制约作用的ETP在修改ENSO，十年到百年的气候变率，和20世纪变暖。 了解变化的机制对评估与未来自然和/或人为变化相关的潜在环境和生态风险和不确定性具有政策意义。