Quantifying Atmospheric Iron Properties over West Antarctic Peninsula

量化西南极半岛的大气铁特性

• 批准号: 1341494
• 负责人: Yuan Gao
• 金额: $ 35.57万
• 依托单位: Rutgers University Newark
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-08-01 至 2020-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1341494&HistoricalAwards=false
• 关键词: Quantifying; Atmospheric; Iron; Properties; over

The research seeks to further quantify the input of atmospheric Fe into the sparsely sampled Southern Ocean (SO), specifically in the vicinity of the West Antarctic Peninsula (WAP) and adjacent continental shelf waters in the Drake Passage. This is typically a high nutrient low chlorophyll region where surface trace metal and primary productivity data are suggestive of Fe limitation. The WAP is characterized by high productivity in the austral summer, and at this time may be in the path of northern dust (aeolian Fe) input or subject to melt influx of elevated Fe accumulated from glacial and present-day sea ice sources.Primary scientific questions are: (1) to what extent does atmospheric Fe contribute to nutrient cycles and ecosystem dynamics in the SO? (2) How is warming climate occurring in the WAP affecting the aerosol composition of the maritime atmosphere. The primary productivity of the Southern Ocean is key to understanding oceanic uptake of anthropogenic greenhouse gases such as carbon dioxide.

该研究旨在进一步量化大气铁输入到样本稀少的南大洋（SO），特别是在南极西部半岛（WAP）附近和德雷克海峡邻近的大陆架水域。这是典型的高营养低叶绿素区域，表面微量金属和初级生产力数据提示铁限制。WAP的特点是在南部夏季生产力高，此时可能处于北部尘埃（风成铁）输入的路径上，或者受到冰川和现代海冰来源积累的高铁的融化流入。主要的科学问题是：(1)大气铁对SO中营养循环和生态系统动力学的贡献程度如何？(2) WAP中气候变暖对海洋大气气溶胶组成的影响。南大洋的初级生产力是了解海洋吸收人为温室气体（如二氧化碳）的关键。