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

doi:10.3390/s22031167

IOCAS-IR > 海洋环流与波动重点实验室

	Direct Measurements of Turbulence in the Upper Western Pacific North Equatorial Current over a 25-h Period
	Yang, Wenlong 1,2; Zhou, Hui 1,2,9; Wang, Yonggang 3,4,5; Liu, Juan 6,7; Liu, Hengchang 6,7; Liu, Chenglong 1; Dewar, William 8
	2022-02-01
发表期刊	SENSORS
卷号	22 期号:3 页码:21
通讯作者	Zhou, Hui([email protected])
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.
关键词	turbulent mixing barrier layer anticyclonic eddy diurnal cycle shear and stratification double-diffusive
DOI	10.3390/s22031167
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Analytical ; Engineering, Electrical & Electronic ; Instruments & Instrumentation
WOS记录号	WOS:000755252500001
出版者	MDPI
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/178111
专题	海洋环流与波动重点实验室
通讯作者	Zhou, Hui
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Pilot Natl Lab Marine Sci & Technol, Qingdao 266237, Peoples R China 2.Univ Chinese Acad Sci, Beijing 101408, Peoples R China 3.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Sci & Numer Modeling, Qingdao 266061, Peoples R China 4.Pilot Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao 266237, Peoples R China 5.Shandong Key Lab Marine Sci & Numer Modeling, Qingdao 266061, Peoples R China 6.Beijing Inst Appl Meteorol, Beijing 100029, Peoples R China 7.State Key Lab Geoinformat Engn, Xian 710054, Peoples R China 8.Florida State Univ, Dept Ocean Atmosphere & Earth Sci, Tallahassee, FL 32304 USA 9.Chinese Acad Sci, Inst Oceanol, 7 Nanhai Rd, Qingdao 266071, Peoples R China
第一作者单位	海洋环流与波动重点实验室
通讯作者单位	海洋环流与波动重点实验室; 中国科学院海洋研究所
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.

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