Ocean Acidification in the Canada Basin: Roles of Sea Ice

加拿大盆地海洋酸化：海冰的作用

• 批准号: 1220032
• 负责人: Jonathan Wynn
• 金额: $ 20.12万
• 依托单位: University of South Florida
• 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: 2012-08-15 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1220032&HistoricalAwards=false
• 关键词: Ocean; Acidification; Canada; Basin; Roles

The proposed research aims to identify mechanisms of ocean acidification and carbonate undersaturation in the Canada Basin of the Arctic Ocean. The investigators will use a 3-year dataset to address the role of two specific mechanisms involving sea-ice processes: (1) surface water freshening and undersaturation resulting from recent enhanced melting of multi-year sea-ice, and (2) surface water undersaturation resulting from a "carbon-pumping" mechanism driven by brine rejection and carbonate mineral precipitation during increasingly cyclical seasonal sea ice growth and decay. The proposed work would expand understanding of the inorganic carbon cycle, air-sea CO2 exchange rates and acidification in the Arctic Ocean. Understanding baselines and how they are changing is important for setting realistic parameters for process studies on the effects of ocean acidification on flora and fauna. The investigators would participate in one upcoming (2012) research cruise and analyze these data along with that from two previous (2010 and 2011) expeditions. The investigators propose to continue an outreach website initiated on the 2011 expedition, including background about the cruise and ocean acidification, a journal depicting different days? activities, a mechanism for the public to ask questions regarding the cruise and our research and answers to those questions, and an education and outreach page with material on ocean acidification. The proposed research will also contribute to graduate student education, and facilitate collaboration between university (USF) and government (USGS) scientists.

拟议的研究旨在确定北冰洋加拿大海盆海洋酸化和碳酸盐不饱和的机制。研究人员将使用一个为期3年的数据集来解决涉及海冰过程的两个特定机制的作用：（1）最近多年海冰融化增强导致的地表水淡化和欠饱和，以及（2）在日益周期性的季节性海冰生长和衰退期间，由盐水排斥和碳酸盐矿物沉淀驱动的“碳泵”机制导致的地表水欠饱和。拟议的工作将扩大对无机碳循环、大气-海洋CO2交换率和北冰洋酸化的了解。了解基线及其变化情况，对于为海洋酸化对植物群和动物群影响的过程研究设定现实的参数十分重要。调查人员将参加一次即将到来的（2012年）研究巡航，并分析这些数据与前两次（2010年和2011年）探险的数据一起沿着。调查人员建议继续在2011年的考察中启动一个外联网站，包括有关巡航和海洋酸化的背景，一个描述不同日子的杂志？我们还将建立一个宣传活动的平台，一个供公众就巡航和我们的研究提出问题并回答这些问题的机制，以及一个教育和外联网页，其中载有关于海洋酸化的材料。拟议的研究还将有助于研究生教育，并促进大学（USF）和政府（USGS）科学家之间的合作。