Equipment Supplement for the Cariaco Ocean Time Series

卡里亚科海洋时间系列的设备补充

• 批准号: 0432616
• 负责人: Robert Thunell
• 金额: $ 3.56万
• 依托单位: University South Carolina Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0432616&HistoricalAwards=false
• 关键词: Equipment; Supplement; Cariaco; Ocean; Time

ABSTRACTOCE 0432616The Cariaco oceanographic time series program collects systematic oceanographic measurements at 10'30N 64'40'W in order to understand the interrelationships between changes in climate, hydrography and sediment production and accumulation in Cariaco Basin. Cariaco is a 1,400-m deep depression on the Venezuelan continental margin that is openly connected to the surface Atlantic Ocean above a shallow (~140 m) sill. Because turnover of basin waters is slow (Deuser, 1973), decomposition of the sinking material leads to permanent anoxia below about 275 m. An excellent sediment record that is widely used to study Holocene and late Pleistocene changes in climate is preserved in this natural continental-shelf sediment trap. In this context, the Cariaco time series provides information on modern biogeochemical processes that will serve as a basis for accurately interpreting this sediment archive of climate change.The recently funded continuation of the Cariaco project for an additional five years (2003- 2008) will yield (1) a time series of the variability of the upwelling of Subtropical Underwater in the Cariaco Basin, including lateral motion, and its impact on primary productivity and the vertical flux of particulate matter; (2) the first direct calibration and concurrent cross-reference of various proxies of sea surface temperature of the Cariaco Basin; (3) clarification of the relative importance of lateral transport and chemoautotrophy as sources of particulates, (4) an assessment of whether variability in the particle flux is driven primarily by local winds or by regional oceanographic processes at the scale of the Tropical Atlantic, and (5) an evaluation of whether changes in nutrient availability/limitation result in major ecosystem changes.With funding through this small award, researchers from the University of South Carolina will purchase of an additional sediment trap and associated supplies. This sediment trap will be added to our existing array of four traps and will address the problem of not having a trap at a shallow enough depth (~150 m) to get an accurate estimate of export flux. Broader Impacts: The Cariaco time series program has significant educational impact on students in the US and on students and scientists in the Caribbean and Latin America. Three PhD students at U.S. universities have completed their degrees working on the Cariaco Project and four more are currently involved in this study. The Venezuelan Ministry for Science and Technology considers CARIACO the most significant oceanographic research program ever conducted in Venezuela, and uses it as a model program to provide direction for funding in other disciplines.

Abstractoce 0432616 Cariaco海洋学时间序列计划在10'30n 64'40'w时收集系统的海洋学测量，以了解Cariaco Basin中气候，水文学生产和沉积物产生和积累的变化之间的相互关系。卡里亚科（Cariaco）是委内瑞拉大陆边缘的1,400米深凹陷，该凹陷与浅层（〜140 m）斜纹的地面大西洋公开相连。由于盆地水的营业额很慢（Deuser，1973），因此沉没材料的分解导致长达275 m以下的永久缺氧。在这种天然的大陆架沉积物陷阱中保留了广泛用于研究全新世和更新世变化的出色沉积物记录。 In this context, the Cariaco time series provides information on modern biogeochemical processes that will serve as a basis for accurately interpreting this sediment archive of climate change.The recently funded continuation of the Cariaco project for an additional five years (2003- 2008) will yield (1) a time series of the variability of the upwelling of Subtropical Underwater in the Cariaco Basin, including lateral motion, and its impact on primary productivity and the vertical flux颗粒物； （2）Cariaco盆地海面温度各种代理的第一个直接校准和同时的交叉引用； （3）阐明侧向转运和化学自动植物作为颗粒物的相对重要性，（4）评估颗粒通量的可变性是主要由当地风或在热带大西洋的范围内的区域海洋学驱动的，以及（5）对主要限制的可用性变化的评估，以及（5）在质量上的变化是否变化。卡罗来纳州将购买额外的沉积物陷阱和相关用品。该沉积物陷阱将被添加到我们现有的四个陷阱的阵列中，并将解决没有足够浅的深度（〜150 m）的陷阱以获得出口通量的准确估计的问题。 更广泛的影响：Cariaco Time Series计划对美国的学生以及加勒比海和拉丁美洲的学生和科学家具有重大的教育影响。美国大学的三位博士学位学生已经完成了在Cari​​aco项目上工作的学位，目前还有另外四名参与这项研究。委内瑞拉科学技术部认为Cariaco是委内瑞拉有史以来最重要的海洋学研究计划，并将其用作模型计划，以提供其他学科资金的指导。