Determining seasonal and interannual controls on air-sea carbon dioxide flux in a highly productive marginal sea

确定高产边缘海海气二氧化碳通量的季节和年际控制

• 批准号: 0851447
• 负责人: Douglas Vandemark
• 金额: $ 74.19万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-03-01 至 2013-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0851447&HistoricalAwards=false
• 关键词: Determining; seasonal; interannual; controls; air

Coastal margins are home to the most productive and dynamic ocean ecosystems and play a key role in regional and global carbon cycling. However, establishing the air-sea carbon flux in these settings has been difficult because of gaps in observational coverage and the ability to assess and model the processes involved. Scientists from the University of New Hampshire have at their disposal a unique set of carbon dioxide data from 2004 to present from monthly shipboard measurements made on the inner, mid, and outer shelf, as well as hourly data from a moored platform. The field data would be combined with a 3D circulation/biochemical model to test the hypothesis that the seasonally stratified Gulf of Maine is a source of carbon dioxide to the atmosphere even though the area has significant net production of phytoplankton. This research would provide the first annual and interannual estimates of carbon dioxide flux that occurs in this region. Results would also lead toward an improved understanding of seasonal impacts on coastal air-sea exchange and would provide more information on global climate-sensitive controls including storm-induced vertical mixing and terrestrial runoff. As regards broader impacts, results from the study would be linked with data from the National Oceanic and Atmospheric Administration buoys located at other coastal sites of the United States. Outreach efforts include the design of a ocean carbon module for the National Science Foundation Globe Carbon Project aimed at a K-12 audience.

沿海边缘是最有生产力和动态的海洋生态系统的所在地，并且在区域和全球碳循环中起着关键作用。但是，由于观察覆盖范围的差距以及评估和建模所涉及的过程的能力，在这些环境中建立空气碳通量非常困难。 来自新罕布什尔大学的科学家可以使用2004年的一组独特的二氧化碳数据，从每月在内部，中和外架上进行的船上测量以及从停泊的平台上进行的每小时数据。 现场数据将与3D循环/生化模型结合使用，以测试缅因州季节性分层的湾是二氧化碳的来源，即使该地区的净生产浮游植物的净生产显着。 这项研究将提供该地区发生的二氧化碳通量的第一个年度和年际估计。 结果还将导致人们对季节性对沿海气海交换的影响的了解，并将提供有关全球气候敏感控制的更多信息，包括暴风雨引起的垂直混合和陆地径流。 关于更广泛的影响，该研究的结果将与美国其他沿海地区国家海洋和大气管理浮标的数据有关。 外展工作包括针对针对K-12观众的国家科学基金会环球碳项目设计的海洋碳模块。