Collaborative Research: Air-Sea CO2 Fluxes and Surface Physical Processes in the Labrador Sea

合作研究：拉布拉多海的海气二氧化碳通量和表面物理过程

• 批准号: 0327256
• 负责人: Wade McGillis
• 金额: $ 24.35万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-01 至 2007-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0327256&HistoricalAwards=false
• 关键词: Collaborative; Research; Air; Sea; CO2

A study of the air-sea flux of carbon dioxide and the surface physical processes controlling it will be conducted during the Labrador Sea spring bloom. The Labrador Sea is highly significant as one of the areas of North Atlantic Deep Water (NADW) formation. During the late spring months, the Labrador Sea experiences a strong plankton bloom, and is an intense sink for carbon dioxide. Deep convection during the subsequent winter mixes the carbon dioxide rich waters throughout the water column. The newly formed NADW is transported southward towards the Antarctic, via a system of deep currents. Given the circulation time scale of order 1000 years, atmospheric gases within the NADW are essentially sequestered. While mid-latitude areas of the global ocean are equally strong sinks of carbon dioxide, gases absorbed into the ocean at these latitudes remain in the near surface waters, and are returned to the atmosphere on the decadal time scale. Hence the gas exchange characteristics in the Labrador Sea are of particular interest because it is one of the few areas of the global ocean that is a long term carbon dioxide sink. The ability to predict and forecast air-sea carbon dioxide fluxes over large areas is also necessary to quantify the adjacent terrestrial carbon budget.The broader impacts of this work relate to improvement of our ability to predict atmospheric carbon dioxide levels, and to assess how it might change climate under various scenarios. The large uncertainty surrounding the flux of carbon dioxide between the atmosphere and ocean prevent us from determining the partitioning of the sink of anthropogenic carbon dioxide between the ocean and the terrestrial biosphere. This uncertainty also limits our ability to accurately model future atmospheric carbon dioxide levels. The process study we have proposed will improve the accuracy of the global ocean carbon dioxide flux estimates and increase our understanding of the causes of its variability. The project will involve students as undergraduate and post-graduate research assistants. The University of Miami is a Hispanic Serving Institution and thereby fosters the participation of under-represented groups in science and engineering. The data will be made available through several data bases via the World Wide Web. The project will contribute to the active outreach activities coordinated through the Dean's Office at the University of Miami.

对二氧化碳的空气通量及其控制其表面物理过程的研究将在拉布拉多海弹簧盛开期间进行。拉布拉多海（Labrador Sea）是北大西洋深水（NADW）地层的地区之一。 在春末，拉布拉多海经历了强烈的浮游生气，是二氧化碳的强烈水槽。随后的冬季，深对流将整个水柱中富含二氧化碳的水混合在一起。 新形成的NADW通过深水系统向南运输到南极。考虑到1000年的循环时间尺度，NADW内的大气气体基本隔离。尽管全球海洋的中纬度区域是二氧化碳的强大水槽，但在这些纬度的海洋中吸收的气体仍保留在近地面水中，并在十年时间尺度上返回到大气中。因此，拉布拉多海的气体交换特性特别令人感兴趣，因为它是全球海洋中少数长期二氧化碳水槽的区域之一。 对于量化相邻的陆生碳预算，还必须预测和预测大面积的空气二氧化碳通量的能力。这项工作的更广泛影响与提高我们预测大气二氧化碳水平的能力有关，并评估在各种场景下它如何改变气候。大气和海洋之间二氧化碳通量的巨大不确定性使我们无法确定人类二氧化碳在海洋和陆地生物圈之间的分配。 这种不确定性还限制了我们准确地对未来大气二氧化碳水平建模的能力。 我们提出的过程研究将提高全球海洋二氧化碳通量估计的准确性，并提高我们对其可变性原因的理解。 该项目将使学生成为本科和研究生研究助理。迈阿密大学是一家西班牙裔服务机构，从而促进了代表性不足的团体参与科学和工程的参与。 数据将通过万维网通过多个数据库提供。 该项目将有助于通过迈阿密大学院长办公室协调的积极外展活动。