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变暖大大放大了南极海岸的多类植物,因为它们是关键的碳沉积点
Chengzhen Zhou1, Maodian Liu1,2,3, Brad E Rosenheim4
1Ministry of Education Laboratory of Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
概括
南极海岸多岛 (ACP) 是重要的碳汇,吸收大量大气中的CO2. 气候变暖放大了它们的碳捕获效率,增强了它们在缓解气候变化中的作用.
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:
- 南洋对全球碳循环至关重要,吸收大气中的二氧化碳.
- 南极沿海波利尼亚 (ACP) 是重要的二氧化碳吸收区域,但它们在碳捕获中的作用尚未完全理解.
- 了解非洲和非洲国家沉积物中的有机碳 (OC) 积累动态对于缓解气候变化至关重要.
研究的目的:
- 为了重建全新世纪到今天的OC积累流和来源在非洲和非洲的沉积物中.
- 为了研究OC积累在ACP的时空动态和驱动因素.
- 评估气候变暖对非洲和非洲国家碳封存效率的影响.
主要方法:
- 高分辨率的OC积累流和来源的重建.
- 对现有数据的分析和来自非洲和非洲国家沉积物的新测量.
- 结构方程建模以确定OC积累的驱动因素.
主要成果:
- 尽管非洲和非洲国家规模较小,但它们占南大洋现代OC积累量的42%.
- 由于气候变暖和海洋初级生产,OC积累量自全新世纪以来增加了九倍.
- 变暖提高了生物碳和OC积累效率在ACP,与较大的多种类型显示更强效应.
结论:
- 气候变暖显著提高了非洲和非洲国家碳捕获效率.
- 非洲和非洲国家正在快速扩张,南大洋是关键的碳汇.
- 这些发现表明,在未来的气候变化场景中存在强大的负反机制.
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