The Possible Role of Nitrous Oxide Production from Nitrification and Denitrification in Continental Shelves Sediments

大陆架沉积物硝化和反硝化作用产生一氧化二氮的可能作用

• 批准号: 9905951
• 负责人: John Christensen
• 金额: $ 40万
• 依托单位: Bigelow Laboratory for Ocean Sciences
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9905951&HistoricalAwards=false
• 关键词: Possible; Role; Nitrous; Oxide; Production

ABSTRACTOCE-9905951Researchers at the Bigelow Laboratory for Ocean Sciences propose to investigate the importance of continental shelves in the oceanic release of nitrous oxide to the atmosphere. Several lines of evidence point to the probable importance of the shelf environment in the global nitrogen cycle. Because nitrous oxide is an important greenhouse gas implicated in global warming and in the destruction of stratospheric ozone, and because continental shelves account for a significant portion of the global ocean area, it is now critically important to quantify the biogeochemical sources, sinks, and transformations in these ocean margins. Through field studies on the continental shelf of the Gulf of Maine, scientists in this study will investigate whether nitrous oxide accumulations in subsurface waters during stratified conditions (summer) are significant relative to summer sea-air fluxes of this gas. The importance of shelf sediments in nitrous oxide production will also be assessed.

ABSTRACTOCE-9905951毕格罗海洋科学实验室的研究人员提议调查大陆架在海洋向大气中释放一氧化二氮中的重要性。 多项证据表明陆架环境在全球氮循环中可能具有重要意义。 由于一氧化二氮是一种重要的温室气体，与全球变暖和平流层臭氧破坏有关，而且大陆架占全球海洋面积的很大一部分，因此现在量化这些海洋边缘的生物地球化学源、汇和转化至关重要。 通过对缅因湾大陆架的实地研究，这项研究中的科学家将调查分层条件下（夏季）地下水中一氧化二氮的积累是否与该气体夏季海空气通量相关。 还将评估陆架沉积物在一氧化二氮生产中的重要性。