ocean chemistry

海洋化学

• 批准号: 1000231148-2015
• 负责人: Buchwald, Carolyn
• 金额: $ 8.74万
• 依托单位: Dalhousie University
• 依托单位国家: 加拿大
• 项目类别: Canada Research Chairs
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=696036
• 关键词: ocean; chemistry

Nitrate, nitrite, and ammonium are essential nutrients for all life. In the open ocean ecosystem the availability of fixed nitrogen will control the total amount of primary production and subsequent removal of carbon from the atmosphere. In coastal ecosystems, however there can be an excess of fixed nitrogen from human activities that can cause overgrowth of algae, which create anoxic zones, fish kills and release of N2O, a potent green house gas. The proposed research uses a powerful new tool of stable isotopes of 15N and 18O in nutrients, to interpret the processes that control nitrogen in the environment.

硝酸盐、亚硝酸盐和铵是所有生命必需的营养物质。在开放的海洋生态系统中，固定氮的可用性将控制初级生产的总量和随后从大气中去除的碳。然而，在沿海生态系统中，人类活动可能会产生过量的固定氮，导致藻类过度生长，从而产生缺氧区、鱼类死亡和释放一氧化二氮（一种强效温室气体）。这项拟议中的研究使用了一种强大的新工具，即营养物中15N和18O的稳定同位素，来解释控制环境中氮的过程。