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Impact of Convective Processes and Sea Ice Formation on the Distribution of Iron in the Ross Sea: Closing the Seasonal Cycle

对流过程和海冰形成对罗斯海铁分布的影响：闭合季节循环

基本信息

批准号：
1543483
负责人：
Peter Sedwick
金额：
$ 39.42万
依托单位：
Old Dominion University Research Foundation
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2015
资助国家：
美国
起止时间：
2015-09-01 至 2020-02-29
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1543483&HistoricalAwards=false
关键词：
Impact Convective Processes Sea Ice

项目摘要

The waters of the Ross Sea continental shelf are among the most productive in the Southern Ocean, and likely comprise a significant oceanic sink for atmospheric carbon dioxide. In this region, primary production can be limited by the supply of dissolved iron to surface waters during the growing season.A range of biogeochemical measurements and activities are to be carried out in the late summer-autumnal- early winter time frame in the Ross Sea in order to better understand phytoplankton dynamics, along with carbon export. These biogeochemical parameters include elements such as Fe, C and S believed to be important to Antarctic ecosystems. As well as there being interest in the functioning of the Ross Sea ecosystem leading up to the impending polar night, there is also uncertainty as to what drives the biogeochemical redistribution undergone by micronutrient Fe species during the extensive sea-ice formation at this time of year.The field setting and remote conditions that accompany the proposed study present several possibilities for STEM education and training at the K-12, undergraduate and graduate levels, as well as for public outreach. At the K-12 level, the project seeks to support the development of educational outreach materials targeting elementary and middle school students,pre-service science teachers, and in-service science teachers.

罗斯海大陆架的水域是南大洋生产力最高的水域之一，很可能是大气二氧化碳的重要海洋汇。在该区域，初级生产可能受到生长季期间向地表水提供的溶解铁的限制。将在罗斯海的夏末-秋季-初冬时间框架内进行一系列生物地球化学测量和活动，以更好地了解浮游植物的动态以及碳输出。这些生物地球化学参数包括被认为对南极生态系统重要的元素Fe、C和S。除了对罗斯海生态系统在即将到来的极夜之前的功能感兴趣外，还不确定是什么驱动了微量营养素Fe物种在每年这个时候大范围的海冰形成期间经历的生物地球化学重新分配。拟议的研究附带的野外环境和偏远条件为K-12、本科生和研究生级别的STEM教育和培训以及公众宣传提供了几种可能性。在K-12阶段，该项目致力于支持针对中小学生、职前科学教师和在职科学教师的教育宣传材料的开发。