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REU: Evaluating the Effects of High Particulate Fluxes on Chemical Processes Occurring at the Amazon River/Ocean Boundary

REU：评估高颗粒通量对亚马逊河/海洋边界发生的化学过程的影响

基本信息

批准号：
8812975
负责人：
David DeMaster
金额：
$ 23.8万
依托单位：
North Carolina State University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1989
资助国家：
美国
起止时间：
1989-01-01 至 1992-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=8812975&HistoricalAwards=false
关键词：
REU Evaluating Effects Particulate Fluxes

项目摘要

This research is part of the AmasSeds Project (A Multi- disciplinary Amazon Shelf Sediment Study), which seeks to understand the physical, chemical and geological processes that affect, or are affected by, particle fluxes on the Amazon shelf. High particulate fluxes occur on the Amazon shelf as a result of the enormous sediment discharge from the Amazon River and the extensive resuspension of fine-grained shelf sediment by tidal processes. This component examines several chemical processes occurring at the Amazon River/ocean boundary which are affected by particle fluxes. The specific topics of research describe: (1) the release of uranium and radium from the particulate phase to the dissolved phase during river/ocean mixing: (2) scavenging of particle-reactive elements from continental shelf waters; and (3) evaluating the effects of suspended sediment concentration on the biological uptake and regeneration of carbon and silicon. This research is part of the AmasSeds Project (A Multi- disciplinary Amazon Shelf Sediment Study), which seeks to understand the physical, chemical and geological proceses that affect, or are affected by, particle fluxes on the Amazon shelf. High fluxes occur on the Amazon shelf as a result of the enormous sediment discharge from the Amazon River and the mixing of fine- grained sediment with river water by the tides. This component of the overall project examines several chemical processes occurring at the Amazon River/ocean boundary which are affected by particle fluxes. An understanding of these processes will help investigators to interpret observations from other river/ocean systems throughout the world.

这项研究是AmasSeds项目（一个多- 亚马逊大陆架沉积物研究），该研究旨在了解物理，化学和地质过程，影响亚马逊大陆架上的粒子通量，或受其影响。高颗粒通量发生在亚马逊大陆架上的结果，来自亚马逊河的大量沉积物潮汐作用下细颗粒陆架沉积物的广泛再悬浮流程. 该组件检查几个化学过程发生在亚马逊河/海洋边界，粒子通量的影响研究的具体主题如下： (1)铀和镭从微粒中释放出来河流/海洋混合期间从相到溶解相： (2)清除颗粒反应性元素，大陆架沃茨; (3)悬浮泥沙影响评价生物吸收和再生的浓度由碳和硅组成。这项研究是AmasSeds项目（一个多- 亚马逊大陆架沉积物研究），该研究旨在了解物理，化学和地质过程，影响亚马逊大陆架上的粒子通量，或受其影响。亚马逊大陆架上的高通量是由于巨大的亚马逊河的沉积物排放和细颗粒物的混合，潮汐作用下河水形成的颗粒状沉积物。此组件整个项目的一部分检查了几个化学过程发生在亚马逊河/海洋边界，粒子通量的影响对这些过程的理解将帮助研究人员解释其他人的观察结果世界各地的河流/海洋系统。