Collaborative Research: Holocene Shell Accumulation from the Southeast Brazilian Bight: Multi-Centennial Dynamics of Oceanographic, Environmental, and Ecological Changes

合作研究：巴西东南湾全新世贝壳堆积：海洋学、环境和生态变化的百年动态

基本信息

批准号：
0602375
负责人：
Michal Kowalewski
金额：
$ 21.93万
依托单位：
Virginia Polytechnic Institute and State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2006
资助国家：
美国
起止时间：
2006-07-01 至 2010-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0602375&HistoricalAwards=false
关键词：
Collaborative Research Holocene Shell Accumulation

项目摘要

AbstractCollaborative Research: Holocene Shell Accumulation from the Southeast Brazilian Bight: Multi-Centennial Dynamics of Oceanographic, Environmental, and Ecological ChangesThis study will assess the Holocene dynamics of oceanographic processes on the Southeast Brazilian Bight (western South Atlantic), a region affected by a western boundary equatorial current, ENSO/SOI-related coastal runoffs, and shelf-break and coastal upwelling events. The PIs will exploit advances in AAR (reverse-phase HPLC for analyzing sub-milligram shell aliquots for asparitic acid D/L ratios) and automated sampling/analytical techniques, to develop multiple stable isotope and elemental time-series of dated brachiopods and bivalves from time-averaged shell accumulation sites across the inner shelf, outer shelf, and continental slope of the Southeast Brazilian Bight. The objectives of this project will be to evaluate multi-centennial to multi-millennial changes in (1) the frequency of short-term events (ENSO/SOI, upwelling); (2) the strength and position of the South Brazil Current; and (3) shellfish bio-productivity in order to evaluate hypotheses regarding the long-term stability of heat-transfer by ocean currents, changes in frequency of ENSO-related coastal runoff in the South Atlantic, and volatility of shelf-break and coastal upwelling as they respond to global-scale climatic processes. This research will support a post-doctoral scientist, involve students and generate new international synergies. This project was co-funded with support from the Office of International Science and Engineering.

摘要协议研究：巴西东南部的全新世壳积累：海洋学，环境和生态变化的多年生动态将评估巴西东南部海洋海洋的全新世动态（南大西洋西部），受到西部边界库层和沿海地区的海岸和沿海地区，沿海岸和海岸越来越多的地区 - 事件。 The PIs will exploit advances in AAR (reverse-phase HPLC for analyzing sub-milligram shell aliquots for asparitic acid D/L ratios) and automated sampling/analytical techniques, to develop multiple stable isotope and elemental time-series of dated brachiopods and bivalves from time-averaged shell accumulation sites across the inner shelf, outer shelf, and continental slope of the Southeast巴西北。该项目的目标是评估（1）短期事件频率（ENSO/SOI，上升流）的多千年变化到多千年的变化；（2）南巴西电流的强度和位置；（3）贝类生物产生率，以评估洋流对热转移的长期稳定性的假设，南大西洋与ENSO相关的沿海径流的频率变化以及货架破裂和沿海上升的波动在响应全球气候尺度的过程中。这项研究将支持博士后科学家，参与学生并产生新的国际协同作用。该项目是在国际科学与工程办公室的支持下共同资助的。