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Small Grants for Exploratory Research - Oceanographic Research in the Amundsen and Ross Seas:

用于探索性研究的小额赠款 - 阿蒙森海和罗斯海的海洋学研究：

基本信息

批准号：
0741380
负责人：
Walker Smith
金额：
--
依托单位：
College of William & Mary Virginia Institute of Marine Science
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2007
资助国家：
美国
起止时间：
2007-09-15 至 2009-02-28
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0741380&HistoricalAwards=false
关键词：
Small Grants Exploratory Research Oceanographic

项目摘要

AbstractThe research will examine the relative importance of the physical and chemical controls on phytoplankton dynamics and carbon flux in continental margin regions of the Southern Ocean, and elucidate mechanisms by which plankton populations and carbon export might be altered by climate change. We specifically will address (1) how the phytoplankton on the continental margins of the southern Ocean respond to spatial and temporal changes in temperature, light, iron supply, and carbon dioxide levels, (2) how these factors initiate changes in phytoplankton assemblage structure, and (3) how carbon export and the efficiency of the biological pump are impacted by the biomass and composition of the phytoplankton. Two regions of study (the Amundsen and Ross Seas) will be investigated, one well studied (Ross Sea) and one poorly described (Amundsen Sea). It is hypothesized that each region will have markedly different physical forcing, giving rise to distinct chemical conditions and therefore biological responses. As such, the comparison of the two may give us insights into the mechanisms of how Antarctic continental margins will respond under changing environmental conditions. Broader impacts include participation by an international graduate student from Brazil, outreach via seminars to the general public, collaboration with the teachers-in-residence on the cruise, development of a cruise web site and interactive email exchanges with local middle school students while at sea

本研究将探讨南大洋大陆边缘地区浮游植物动态和碳通量的物理和化学控制的相对重要性，并阐明浮游生物种群和碳输出可能因气候变化而改变的机制。我们具体将解决（1）如何在南大洋大陆边缘的浮游植物响应温度，光，铁供应和二氧化碳水平的时空变化，（2）这些因素如何启动浮游植物组合结构的变化，（3）如何碳输出和生物泵的效率受到浮游植物的生物量和组成的影响。将调查两个研究区域（阿蒙森海和罗斯海），一个研究充分（罗斯海），一个描述不充分（阿蒙森海）。据推测，每个区域将有明显不同的物理强迫，引起不同的化学条件，因此生物反应。因此，两者的比较可能使我们深入了解南极大陆边缘如何在不断变化的环境条件下作出反应的机制。更广泛的影响包括来自巴西的一名国际研究生的参与，通过研讨会向公众进行宣传，与游轮上的常驻教师合作，开发游轮网站，以及在海上与当地中学生进行互动式电子邮件交流