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: 1002969
• 负责人: Mark Altabet
• 金额: $ 17万
• 依托单位: University of Massachusetts, Dartmouth
• 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 2014-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1002969&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）在全球气候和海洋地球化学中起着重要作用。利用最近从秘鲁边缘收集的一系列岩心，这项合作研究产生了一个综合的古海洋学数据集，包括烯酮，微量元素，稳定同位素和沉积物组成。这些数据被用来记录横向和垂直梯度的物理，生物和地球化学性质的关键方面的冷舌区域的EEP。该方法是围绕三个时间流的分辨率越来越高：末次冰期最大（LGM）通过终端I，全新世，和过去的2000年。 研究小组测试了EEP的古海洋学由两个不同的驱动因素决定的假设：高纬度南大洋的远程影响，从LGM到全新世中期主导了地表和地下特性，以及在过去约5 ky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，为弱势高中生提供实习机会，以及与南美科学家的合作。