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学科主题: Meteorology & Atmospheric Sciences ; Oceanography
题名: The instability of diffusive convection and its implication for the thermohaline staircases in the deep Arctic Ocean
作者: Zhou, SQ ; Qu, L ; Lu, YZ ; Song, XL
通讯作者: sqzhou@scsio.ac.cn
刊名: OCEAN SCIENCE
发表日期: 2014
卷: 10, 期:1, 页:127-134
收录类别: sci
部门归属: [Zhou, S. -Q. ; Qu, L. ; Lu, Y. -Z. ; Song, X. -L.] South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China ; [Qu, L. ; Lu, Y. -Z. ; Song, X. -L.] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
项目归属: LTO
资助者: China NSF [41176027, 11072253]; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA11030302]; LTO [LTOZZ1304]
摘要: In the present study, the classical description of diffusive convection is updated to interpret the instability of diffusive interfaces and the dynamical evolution of the bottom layer in the deep Arctic Ocean. In the new consideration of convective instability, both the background salinity stratification and rotation are involved. The critical Rayleigh number of diffusive convection is found to vary from 10(3) to 10(11) in the deep Arctic Ocean as well as in other oceans and lakes. In such a wide range of conditions, the interface-induced thermal Rayleigh number is shown to be consistent with the critical Rayleigh number of diffusive convection. In most regions, background salinity stratification is found to be the main hindrance to the occurrence of convecting layers. With the new parameterization, it is predicted that the maximum thickness of the bottom layer is 1051 m in the deep Arctic Ocean, which is close to the observed value of 929 m. The evolution time of the bottom layer is predicted to be similar to 100 yr, which is on the same order as that based on C-14 isolation age estimation.
原文出处: 查看原文
WOS记录号: WOS:000332316200009
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10587
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Zhou, SQ; Qu, L; Lu, YZ; Song, XL.The instability of diffusive convection and its implication for the thermohaline staircases in the deep Arctic Ocean,OCEAN SCIENCE,2014,10(1):127-134
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