期刊
GEOPHYSICAL RESEARCH LETTERS
卷 45, 期 2, 页码 864-871出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2017GL076206
关键词
Black Sea; suboxic zone; oxygen; sulfide; suspended particles
资金
- EC [287600]
- Italian Ministry of Education, University and Research through the Argo-Italy programme
- EC project E-AIMS [312 642]
- ERC project remOcean [246777]
- David and Lucile Packard Foundation
The Black Sea, the largest semienclosed anoxic basin on Earth, can be considered as an excellent natural laboratory for oxic and anoxic biogeochemical processes. The suboxic zone, a thin interface between oxic and anoxic waters, still remains poorly understood because it has been undersampled. This has led to alternative concepts regarding the underlying processes that create it. Existing hypotheses suggest that the interface originates either by isopycnal intrusions that introduce oxygen or the dynamics of manganese redox cycling that are associated with the sinking of particles or chemosynthetic bacteria. Here we reexamine these concepts using high-resolution oxygen, sulfide, nitrate, and particle concentration profiles obtained with sensors deployed on profiling floats. Our results show an extremely stable structure in density space over the entire basin with the exception of areas near the Bosporus plume and in the southern areas dominated by coastal anticyclones. The absence of large-scale horizontal intrusive signatures in the open-sea supports a hypothesis prioritizing the role of biogeochemical processes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据