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解决格陵兰岛沿海海洋中CO2吸收潜力的异质性

Henry C Henson^1,2, Mikael Sejr^1,2, Lorenz Meire^3,4

¹Department of Ecoscience Aarhus University Midtjylland Denmark.

Journal of geophysical research. Biogeosciences

|November 29, 2024

概括

格陵兰岛 - 格陵兰岛是什么?

科学领域:

海洋学海洋学海洋学
气候科学气候科学
生物地质化学生物地质化学

背景情况:

海洋将大约25%的人为二氧化碳 (CO2) 封存起来.
高度海洋,特别是北极货架,是重要的二氧化碳吸收器.
了解北极碳动态至关重要,但由于区域异质性而具有挑战性.

研究的目的:

研究在冰川融化期间在格陵兰岛沿海海洋中二氧化碳部分压力 (pCO2) 的变化.
估计格陵兰岛沿海的空海二氧化碳汇率.
确定控制该敏感区域二氧化碳吸收的因素.

主要方法:

在格陵兰海岸6度度的pCO2现场测量.
使用已确定的公式计算空海二氧化碳流量.
与淡水出口和初级生产相关的地理差异分析.

主要成果:

格陵兰东部和西部海岸显示出明显的二氧化碳动态,两者都作为夏季的二氧化碳沉.
二氧化碳吸收受到冰盖淡水出口和初级生产力的强烈影响.
空气-海洋二氧化碳的交换有很大的差异,从0.23到-64 mmol m-2 day-1之间.

结论:

格陵兰岛的沿海海洋是重要的二氧化碳汇,但它们的容量是由淡水输入和生物活动调节的.
由于方法选择 (风力数据,气交公式),流量估计存在重大不确定性,导致广泛的升级吸收估计 (-16-26 Tg C年-1).
准确的评估需要广泛的季节性数据和完善的气体转移速度模型,用于北极沿海地区.

关键词:

北极的环境北极的环境航空海交换航空海交换沿海海洋沿海海洋转移气体转移气体是什么空间异质性空间异质性不确定性是一种不确定性.

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