International Research Fellowship Program: The Effect of Subsurface Variability on Nutrient Fluxes and the Biological Response to Upwelling off Northwest Africa

国际研究奖学金计划：地下变化对营养通量的影响以及对西北非上升流的生物反应

• 批准号: 0701252
• 负责人: Jaime Palter
• 金额: --
• 依托单位: Palter Jaime B
• 依托单位国家: 美国
• 项目类别: Fellowship
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-08-01 至 2011-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0701252&HistoricalAwards=false
• 关键词: International; Research; Fellowship; Program; Effect

0701252PalterThe International Research Fellowship Program enables U.S. scientists and engineers to conduct nine to twenty-four months of research abroad. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad.This award will support a twelve-month research fellowship by Dr. Jaime Palter to work with Dr. Josep L. Pelegri at CMIMA Marine Institute in Barcelona, Spain.The Northwest African upwelling region, which extends southward from the Iberian Peninsula to the tropical Atlantic, is one of the world's four major eastern boundary upwelling regions. In addition to intense regional interest spawned by the economic importance of the fisheries that thrive there, the locale is of global interest as it forms the eastern boundary condition of the North Atlantic subtropical gyre and has been implicated in the biogeochemical cycling of Antarctic water masses. Recent studies have revealed that variability in the biology of this upwelling region cannot be explained by wind forcing alone. It is hypothesized that complex and time-varying currents alter the subsurface nutrient reservoir and thereby impact the biological response to upwelling. Dr. Josep Pelegri is the principal investigator of CANOA, a large-scale observational and modeling program that seeks a comprehensive understanding of the circulation and variability of the water masses in the Northwest African upwelling region. This work interfaces with CANOA to assess the impact of such subsurface variability on the nutrient reservoir of the upwelling region. To these ends, the PI is analyzing historical and newly collected hydrographic, ARGO float, and nutrient data, and deploying an in-situ nitrate sensor on a CANOA mooring to obtain the first continuous nutrient time series in the region. The second piece of this work is aimed at using an enhanced understanding of the regional dynamics to gain insight into satellite chlorophyll patterns. This component of the work will combine the analysis of satellite chlorophyll and other satellite-observed variables with the in situ data sets described above to explore the primary controls on phytoplankton biomass in the region.

0701252Palter国际研究奖学金计划使美国科学家和工程师能够在国外进行九到二十四个月的研究。该项目的奖项为联合研究以及使用国外独特或互补的设施、专业知识和实验条件提供了机会。该奖项将支持 Jaime Palter 博士与 CMIMA 的 Josep L. Pelegri 博士合作为期 12 个月的研究奖学金西班牙巴塞罗那海洋研究所。西北非洲上升流区从伊比利亚半岛向南延伸至热带大西洋，是世界四大东部边界上升流区之一。除了因当地渔业的经济重要性而产生强烈的区域兴趣外，该地区还引起全球关注，因为它形成了北大西洋副热带环流的东部边界条件，并与南极水团的生物地球化学循环有关。最近的研究表明，这个上升流区域的生物学变异不能仅用风力来解释。据推测，复杂且随时间变化的水流会改变地下营养物库，从而影响对上升流的生物反应。 Josep Pelegri 博士是 CANOA 的首席研究员，CANOA 是一个大型观测和建模项目，旨在全面了解西北非上升流区域水团的循环和变化。这项工作与 CANOA 相结合，评估这种地下变化对上升流区域营养物库的影响。为此，PI 正在分析历史和新收集的水文、ARGO 浮标和营养物数据，并在 CANOA 系泊装置上部署现场硝酸盐传感器，以获得该地区第一个连续的营养物时间序列。这项工作的第二部分旨在加深对区域动态的了解，以深入了解卫星叶绿素模式。该工作的这一部分将把卫星叶绿素和其他卫星观测变量的分析与上述原位数据集结合起来，探索对该地区浮游植物生物量的主要控制。