Collaborative Research: An ultra-high resolution, multiproxy study of the past 2,000 years of climate change in Southern California.

合作研究：对南加州过去 2,000 年气候变化进行的超高分辨率、多代理研究。

• 批准号: 0752068
• 负责人: Arndt Schimmelmann
• 金额: $ 18.72万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0752068&HistoricalAwards=false
• 关键词: Collaborative; Research; ultra; resolution; multiproxy

Intellectual Merit: This research seeks to carry out a high-resolution multiproxy study of climate change over the last 2,000 year in Southern California in the Santa Barbara Basin. The research will improve the ability to predict the environmental response to global warming in Southern California and will help to understand how regional precipitation, extreme weather events and ocean circulation responded to past Holocene climate change in the area. High resolution paleoclimate data will be collected on sediment cores that span the Little Ice Age interval, Medieval Climate Anomaly, and the rapid warming in the 20th and 21st Centuries. Project objectives will be reconstruction of sea surface temperature shifts for the targeted intervals at ~10 year resolution. Reconstruction of the biogenic and lithologic sedimentary input into the basin with a 1-2 year resolution via scanning XRF will also be used to identify extreme weather events. Data from this time series will be compared with terrestrial paleoclimate records in terms of tree rings, pollen profiles, and archeological dates. Multiple box and Kasten cores will be sampled and analyzed for radiocarbon and varves to constrain ages. Multi-species planktonic foram Mg/Ca ratios and oxygen isotope analyses will illuminate sea surface temperatures. Census counts of forams, radiolarians, and diatoms will provide information on seasonal shifts in water column structure and bioproductivity. Results will allow ecosystem reconstructions and will inform us about the climate conditions and land/ocean responses in the last 2,000 years. Data will be also analyzed to try and find any periodicities associated with Pacific Decadal Oscillations (PDO) and El Nino Southern Oscillation (ENSO). Broader Impacts: The regional effect of climate change on human resources is of significant societal importance under the present conditions of climate warming. This project will support two female PIs and advance the professional training of several graduate and undergraduate students. Efforts will be made to recruit students from groups under-represented in the sciences using established minority outreach engines. Results of the work will be broadly disseminated to the public over the Internet through the EarthGuide website, which will include related curriculum at the high school level.

知识分子的优点：这项研究试图在过去的2,000年中在南加州在圣塔芭芭拉盆地进行一项高分辨率的气候变化研究。 这项研究将提高预测南加州全球变暖的环境反应的能力，并有助于了解区域降水，极端天气事件和海洋循环如何响应该地区过去的全新世气候变化。 高分辨率的古气候数据将在跨越冰期小时，中世纪的气候异常以及20世纪和21世纪快速变暖的沉积物核心上收集。 项目目标将是针对目标间隔的海面温度变化以约10年的分辨率进行重建。 通过扫描XRF的1 - 2年分辨率将生物和岩性沉积输入的重建也将用于识别极端天气事件。 根据树环，花粉剖面和考古日期，将将这个时间序列的数据与陆地古气候记录进行比较。 将对放射性碳和变化以约束年龄进行采样并分析多个盒子和Kasten核心。 多种物种浮游物孔（Mg/Ca）比率和氧同位素分析将阐明海面温度。 孔子，放射性虫和硅藻的人口普查计数将提供有关水柱结构和生物生产力的季节性变化的信息。 结果将允许生态系统的重建，并将在过去2000年中告知我们气候状况和土地/海洋响应。 还将分析数据，以尝试找到与太平洋十年振荡（PDO）和El Nino Southern振荡（ENSO）相关的任何周期。 更广泛的影响：在当前气候变暖的条件下，气候变化对人力资源的区域影响至关重要。 该项目将支持两名女性PI，并进步对几位研究生和本科生的专业培训。将努力使用既定的少数派外展引擎招募学生在科学中代表不足的团体的招募学生。这项工作的结果将通过Earthguide网站通过Internet广泛传播给公众，该网站将包括高中级的相关课程。