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（一项多学科的亚马逊架子沉积物研究）的一部分，该项目旨在了解影响亚马逊架子上粒子通量的影响或受影响的物理，化学和地质过程。由于亚马逊河的巨大沉积物排放以及通过潮汐过程对细粒货架沉积物的广泛重悬浮，亚马逊架子上发生了高颗粒通量。该组件研究了在亚马逊河/海洋边界上发生的几种化学过程，这些化学过程受颗粒通量影响。研究的特定主题描述了：（1）在河流/海洋混合期间，铀和镭从颗粒相释放到溶解相的释放：（2）清除大陆架水域的颗粒反应元件；（3）评估悬浮沉积物浓度对碳和硅再生的影响。这项研究是Amassed项目（一项多学科的亚马逊架子沉积物研究）的一部分，该项目旨在了解影响Amazon架子上粒子通量的物理，化学和地质过程。由于亚马逊河的巨大沉积物排放以及潮汐的河水与河水混合，亚马逊架子上发生了高通量。整个项目的这个组成部分研究了在亚马逊河/海洋边界上发生的几个化学过程，这些化学过程受颗粒通量影响。对这些过程的理解将有助于调查人员解释全球其他河流/海洋系统的观察结果。