气候变化领域集成服务门户(CCPortal): Analysis of Acoustic Observations of Double-Diffusive Finestructure in the Arctic Ocean

CCPortal

DOI	10.1029/2020GL089845
	Analysis of Acoustic Observations of Double-Diffusive Finestructure in the Arctic Ocean
	Shibley N.C.; Timmermans M.-L.; Stranne C.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:18
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 echo sounder 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 echo sounder allow for insights into how double-diffusive heat fluxes and inferred mixing levels may vary in space/time. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Acoustic devices; Heat convection; Reflection; Sea ice; Turbulence; Broadband echoes; Double diffusive; Double-diffusive convection; Fine structures; High gradient; High resolution; Turbulence level; Water columns; Stairs; acoustic method; convection; echo sounder; heat flux; heat transfer; observational method; sea ice; stratification; water column; Arctic Ocean
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169687
作者单位	Department of Earth and Planetary Sciences, Yale University, New Haven, CT, United States; Department of Geological Sciences, Stockholm University, Stockholm, Sweden
推荐引用方式 GB/T 7714	Shibley N.C.,Timmermans M.-L.,Stranne C.. Analysis of Acoustic Observations of Double-Diffusive Finestructure in the Arctic Ocean[J],2020,47(18).
APA	Shibley N.C.,Timmermans M.-L.,&Stranne C..(2020).Analysis of Acoustic Observations of Double-Diffusive Finestructure in the Arctic Ocean.Geophysical Research Letters,47(18).
MLA	Shibley N.C.,et al."Analysis of Acoustic Observations of Double-Diffusive Finestructure in the Arctic Ocean".Geophysical Research Letters 47.18(2020).