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Direct Measurements of Turbulence in the Upper Western Pacific North Equatorial Current over a 25-h Period

文献类型：期刊论文

作者Yang, Wenlong8,9; Zhou, Hui2,8,9; Wang, Yonggang1,6,7; Liu, Juan4,5; Liu, Hengchang4,5; Liu, Chenglong9; Dewar, William3
刊名SENSORS
出版日期2022-02-01
卷号22期号:3页码:21
关键词turbulent mixing barrier layer anticyclonic eddy diurnal cycle shear and stratification double-diffusive
DOI10.3390/s22031167
通讯作者Zhou, Hui(zhouhui@qdio.ac.cn)
英文摘要Measurements of the turbulent kinetic energy dissipation rate (epsilon) were conducted by a free-fall microstructure profiler in the western Pacific North Equatorial Current (WPNEC) during a continuous period of 25 h, from the sea surface to about 160 m depth. In the mixed layer (ML), epsilon values were typically on the order of 10(-8)& SIM;10(-7) W kg(-1), and an obvious diurnal cycle existed in the upper 40 m of the surface mixing layer. Below the ML, epsilon was reduced to 10(-9)& SIM;10(-8) W kg(-1) with some patches of high epsilon reaching 10(-7.5) W kg(-1). The barrier layer was identified in the nighttime with a maximum thickness of 20 m, and it was eroded by the advection of freshwater within the lower part of the isothermal layers associated with an anticyclonic eddy in the afternoon. A simple scaling relevant to shear (S-2) instability and stratification (N-2) that can predict turbulent dissipation rates in the transition layer, between the well-mixed layer and the thermocline below, was obtained through the scaling epsilon & SIM;S-0.40N0.20. Besides turbulence, double-diffusive processes also contributed to the vertical mixing levels in the upper WPNEC.
资助项目NSFC[41876009] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000] ; NSF[OCE-1829856] ; NSF[OCE-1941963] ; French `Make Our Planet Great Again' program[ANR-18-MPGA-0002]
WOS研究方向Chemistry ; Engineering ; Instruments & Instrumentation
语种英语
WOS记录号WOS:000755252500001
出版者MDPI
源URL[http://ir.qdio.ac.cn/handle/337002/178110]  
专题海洋研究所_海洋环流与波动重点实验室
通讯作者Zhou, Hui
作者单位1.Pilot Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao 266237, Peoples R China
2.Chinese Acad Sci, Inst Oceanol, 7 Nanhai Rd, Qingdao 266071, Peoples R China
3.Florida State Univ, Dept Ocean Atmosphere & Earth Sci, Tallahassee, FL 32304 USA
4.State Key Lab Geoinformat Engn, Xian 710054, Peoples R China
5.Beijing Inst Appl Meteorol, Beijing 100029, Peoples R China
6.Shandong Key Lab Marine Sci & Numer Modeling, Qingdao 266061, Peoples R China
7.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Sci & Numer Modeling, Qingdao 266061, Peoples R China
8.Univ Chinese Acad Sci, Beijing 101408, Peoples R China
9.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Pilot Natl Lab Marine Sci & Technol, Qingdao 266237, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Wenlong,Zhou, Hui,Wang, Yonggang,et al. Direct Measurements of Turbulence in the Upper Western Pacific North Equatorial Current over a 25-h Period[J]. SENSORS,2022,22(3):21.
APA Yang, Wenlong.,Zhou, Hui.,Wang, Yonggang.,Liu, Juan.,Liu, Hengchang.,...&Dewar, William.(2022).Direct Measurements of Turbulence in the Upper Western Pacific North Equatorial Current over a 25-h Period.SENSORS,22(3),21.
MLA Yang, Wenlong,et al."Direct Measurements of Turbulence in the Upper Western Pacific North Equatorial Current over a 25-h Period".SENSORS 22.3(2022):21.

入库方式： OAI收割

来源：海洋研究所

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