Natural Fe Fertilization and Bioactive Metal Dynamics on the Western Antarctic Peninsula Shelf

南极西部半岛陆架的天然铁肥和生物活性金属动力学

• 批准号: 1142250
• 负责人: Robert Sherrell
• 金额: $ 50.41万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-15 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1142250&HistoricalAwards=false
• 关键词: Natural; Fe; Fertilization; Bioactive; Metal

The shelf waters off the Western Antarctic Peninsula characteristically show high primary productivity, yet are bounded to the west and north by an apparently iron limited Antarctic Circumpolar Current. Natural sources of bioavailable Fe amendments are thought variously to arise from atmospheric deposition, upwelled Circumpolar Deep Water shoaling over the continental shelf, glacier and iceberg melting or even inputs from underlying shallow shelf sediments. As part of the ongoing Palmer LTER (Long-Term Ecological Research) program, a comprehensive study of the water column distribution, bio-uptake studies and the dynamics of various forms of Fe and other bioactive elements will be used to inform physical and biogeochemical models of the WAP. The Western Antarctic Peninsula is a region of recent rapid climate change and also an important time series site for monitoring carbon uptake from the atmosphere, by the polar ocean. How ecological processes currently being studied in the context of the Palmer LTER site are adapting to a warming ocean is of interest to the science education community, the public, and society at large on issues ranging from the health of the oceans to global sea level rise.

西南极半岛外的大陆架沃茨典型地表现出较高的初级生产力，但其西部和北部受到明显的铁限制的南极绕极流的限制。生物可利用的铁修正物的天然来源被认为是不同的，从大气沉积，上升的绕极深水变浅的大陆架，冰川和冰山融化，甚至从下面的浅陆架沉积物的输入。 作为正在进行的Palmer LTER（长期生态研究）计划的一部分，将对水柱分布、生物吸收研究以及各种形式的Fe和其他生物活性元素的动态进行全面研究，以了解WAP的物理和生物地球化学模型。南极西部半岛是近期气候变化迅速的地区，也是监测极地海洋从大气中吸收碳的重要时间序列站点。目前正在帕尔默LTER网站的背景下研究的生态过程如何适应海洋变暖是感兴趣的科学教育界，公众和整个社会的问题，从海洋的健康到全球海平面上升。