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: 1003400
• 负责人: Yair Rosenthal
• 金额: $ 24.5万
• 依托单位: Rutgers University New Brunswick
• 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 2014-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1003400&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.

东部赤道太平洋（EEP）在全球气候和海洋生物地球化学中起关键作用。该协作研究使用最近收集的一系列核心，从该区域产生了一个集成的古环摄影数据集，包括烯烃，微量元素，稳定的同位素和沉积物组成。这些数据用于记录EEP冷舌区域物理，生物和地球化学特性的关键方面的横向和垂直梯度。该方法是在越来越高的分辨率的三个时间流中结构的：通过终止I，全新世和最后2千年，最后冰川最大（LGM）。 研究小组检验了以下假设：EEP的古海洋学是由两个不同的驱动因素决定的：高纬度的南大洋的远程影响，从LGM到中期全新世的占主导地位和地下特性，以及驱动现代的El Nino Nino-Southern-Southern-Sounternern振动（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，为处境不利的高中生实习以及与南美科学家的合作。