GSTDTAP  > 气候变化
DOI10.1029/2020GL089845
Analysis of acoustic observations of double‐diffusive finestructure in the Arctic Ocean
Nicole Shibley; Mary‐; Louise Timmermans; Christian Stranne
2020-09-09
发表期刊Geophysical Research Letters
出版年2020
英文摘要

Double‐diffusive convection may occur if both temperature and salinity increase with depth, as in the Arctic Ocean. The process is identifiable by a staircase structure, with mixed layers separated by high‐gradient interfaces in temperature and salinity. These staircases, which persist if turbulence levels are weak, are widely present in the Arctic Ocean and responsible for transporting heat toward the overlying sea ice. Acoustic observations (reflection coefficients) from a broadband echosounder are analyzed here to track the detailed evolution of interfaces in the Arctic'€™s double‐diffusive staircase. We infer interface thicknesses from reflection coefficient profiles and find that thicknesses appear to be related to water‐column displacements. Further, we relate reflection coefficients to interface stratification, and interpret stratification changes in the context of turbulence acting to thicken interfaces. The high resolution capabilities of the echosounder allow for insights into how double‐diffusive heat fluxes and inferred mixing levels may vary in space/time.

领域气候变化
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/294028
专题气候变化
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Nicole Shibley,Mary‐,Louise Timmermans,等. Analysis of acoustic observations of double‐diffusive finestructure in the Arctic Ocean[J]. Geophysical Research Letters,2020.
APA Nicole Shibley,Mary‐,Louise Timmermans,&Christian Stranne.(2020).Analysis of acoustic observations of double‐diffusive finestructure in the Arctic Ocean.Geophysical Research Letters.
MLA Nicole Shibley,et al."Analysis of acoustic observations of double‐diffusive finestructure in the Arctic Ocean".Geophysical Research Letters (2020).
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