Data-Model Synthesis: Gulf of Alaska Sea-Surface Paleotemperature, Freshwater Input, and the Dynamics of Deglacial Climate Variability

数据模型综合：阿拉斯加湾海面古温度、淡水输入和冰消期气候变化的动态

• 批准号: 1204204
• 负责人: Alan Mix
• 金额: $ 53万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-07-01 至 2016-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1204204&HistoricalAwards=false
• 关键词: Data; Model; Synthesis; Gulf; Alaska

The high-latitude North Pacific is a key region for understanding past changes in the ocean-climate system, yes it remains understudied and undersampled compared to similarly important regions of the global oceans. Attempts to model the North Pacific region at the Last Glacial Maximum (LGM) have produced divergent results, and currently no comprehensive paleoceanographic records exist to verify model output.To address this problem, this study will investigate North Pacific sea surface temperature and upper ocean changes at the LGM using a combined multi-proxy and multi-model synthesis approach. The project, led by faculty members at Oregon State University in collaboration with researchers in Portugal, will leverage sediment cores from previous field campaigns to obtain proxy data. The use of multiple proxies (oxygen isotopes, foraminiferal and diatom assemblages, Mg/Ca from planktonic foraminifera, clumped isotope analysis, and alkenone paleothermometry) will help to resolve inconsistencies and avoid biases produced by single-proxy reconstructions. Multi-proxy data will be compared with a synthesis of multiple models to establish constraints on the behavior of the North Pacific at the LGM. This work will produce a better understanding of North Pacific ocean-climate dynamics that are relevant to regional policy concerns (e.g., Alaskan glacier melt, changes affecting North Pacific fisheries). The project includes workforce development and mentoring at a wide range of levels, including post-doctoral associates in Portugal, a PhD student at OSU, an OSU undergraduate student from an underrepresented minority group, and high school students through the OSU Saturday Academy and NSF's Research Apprenticeships for High School Students program. OSU faculty members will work with National Park Service representatives to incorporate project results into outreach materials for three Alaskan National Parks and the NPS Climate Change Response program.

高纬度北太平洋是了解海洋气候系统过去变化的关键区域，是的，与全球海洋同样重要的地区相比，它仍然对其进行了研究和不足的采样。试图在最后冰川最大（LGM）上对北太平洋地区进行建模的尝试产生了分歧的结果，目前尚无全面的古文化记录来验证模型输出。要解决这一问题，这项研究将研究北太平洋海面温度和上海上的LGM上的上海变化。该项目由俄勒冈州立大学与葡萄牙研究人员合作领导，将利用先前现场活动的沉积物核心来获取代理数据。使用多个代理（氧同位素，有孔虫和硅藻组合，来自浮游有孔虫的mg/ca，来自浮游有孔虫，结块的同位素分析和烷酮的苍白热热度测定法）将有助于解决不一致的情况并避免单氧化物构造产生的偏见。将将多种数据与多个模型的合成进行比较，以建立对LGM北太平洋行为的约束。这项工作将更好地了解与区域政策问题有关的北太平洋 - 气候动态（例如，阿拉斯加冰川融化，影响北太平洋渔业的变化）。该项目包括劳动力开发和指导，包括葡萄牙的博士后同事，OSU的博士生，OSU本科生的博士生，来自代表性不足的少数群体的OSU本科生以及OSU Saturday Academy和NSF的高中生和NSF的高中生研究学徒计划。 OSU教职员工将与国家公园服务局代表合作，将项目结果纳入三个阿拉斯加国家公园和NPS气候变化响应计划的外展材料中。