Collaborative Research: High resolution paleoceanography in the heart of the Equatorial Pacific Cold Tongue

合作研究：赤道太平洋冷舌中心的高分辨率古海洋学

• 批准号: 1003387
• 负责人: Timothy Herbert
• 金额: $ 33.58万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-08-01 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1003387&HistoricalAwards=false
• 关键词: Collaborative; Research; resolution; paleoceanography; heart

The Eastern Equatorial Pacific (EEP) plays a key role in global climate and ocean biogeochemistry. Using a recently collected series of cores from the Peruvian margin, this collaborative research generates an integrated paleoceanographic data set from this region, including alkenones, trace elements, stable isotopes, and sediment composition. These data are used to document lateral and vertical gradients in key aspects of physical, biological, and geochemical properties of the cold tongue region of the EEP. The approach is structured around three time streams of increasingly high resolution: last glacial maximum (LGM) through Termination I, the Holocene, and the last 2 millennia. The research team tests the hypothesis that the paleoceanography of the EEP has been dictated by two distinct drivers: the remote influence of the high latitude southern ocean, which dominated surface and subsurface properties from the LGM to the middle Holocene, and tropical dynamics which drove the modern El Nino-Southern Oscillation (ENSO) system over the past ~5 ky. Broader impacts include graduate and post-doctoral training, internships for disadvantaged high school students, and collaborations with South American scientists.

东赤道太平洋（EEP）在全球气候和海洋生物地球化学中发挥着关键作用。这项合作研究利用最近从秘鲁边缘收集的一系列岩心，生成了该地区的综合古海洋学数据集，包括烯酮、微量元素、稳定同位素和沉积物成分。这些数据用于记录 EEP 冷舌区域物理、生物和地球化学特性关键方面的横向和垂直梯度。该方法围绕三个分辨率越来越高的时间流构建：末次盛冰期 (LGM) 到终端 I、全新世和最后 2000 年。 研究小组测试了这样一个假设，即EEP的古海洋学是由两个不同的驱动因素决定的：高纬度南大洋的远程影响，它主导了从末次盛冰期到全新世中期的地表和地下特性，以及在过去约5天内驱动现代厄尔尼诺-南方涛动（ENSO）系统的热带动力学。更广泛的影响包括研究生和博士后培训、弱势高中生的实习以及与南美科学家的合作。