中层层对南大洋生物地质化学的影响
Lydia Keppler1,2, Yassir A Eddebbar1, Sarah T Gille1
1Scripps Institution of Oceanography University of California San Diego La Jolla CA USA.
概括
南大洋的旋显著影响溶解的无机碳,酸盐和氧气. 反气旋旋 (AEs) 和气旋旋 (CEs) 影响碳流,AE有助于碳吸收,CE则抵消了这一点.
科学领域:
- 海洋学 海洋学 海洋学
- 生物地质化学生物地质化学
- 气候科学 气候科学
背景情况:
- 南大洋的特点是动态的中大尺度旋,影响全球生物地球化学循环.
- 之前的研究缺乏对南洋生物地质化学的效应的大规模观测量化.
研究的目的:
- 量化旋对溶解无机碳 (DIC),酸盐和溶解氧气的观测效应.
- 评估旋对南大洋上1500米的碳流的影响.
主要方法:
- 旋的同位 (通过卫星高度测量识别) 与生物地球化学Argo浮标.
- 对DIC,酸盐和溶氧度和异常的分析.
- 评估空气-海洋碳交换的季节性变化.
主要成果:
- 反旋风 (AEs) 显示较低的DIC和酸盐;旋风 (CEs) 显示度增加.
- 溶解氧异常因深度和旋风类型而异 (CE中混合层以上呈阳性,AE中呈阴性).
- 埃迪的抽和捕获被确定为主要机制;观察到季节性碳流的影响.
结论:
- 旋在南大洋的生物地球化学和碳循环中起着至关重要的作用.
- 对碳吸收和排气的观察到的效应强调了它们的重要性.
- 研究结果强调需要将的影响纳入气候模型和观测系统.
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