文献类型：期刊文献

英文题名：On the Variation of Dissipation Flux Coefficient in the Upper South China Sea

作者：Li, Jianing[1]; Yang, Qingxuan[1,2,3]; Sun, Hui[1]; Zhang, Shuwen[4]; Xie, Lingling[5,6]; Wang, Qingye[3,7,8]; Zhao, Wei[1,2,3]; Tian, Jiwei[1,2,3]

机构：[1] College of Oceanic and Atmospheric Sciences, Physical Oceanography Laboratory, Institute for Advanced Ocean Study and Frontiers Science Center for Deep Ocean Multispheres and Earth System [FDOMES], Ocean University of China, Qingdao, China; [2] Sanya Oceanographic Institution, Ocean University of China, Sanya, China; [3] Laboratory for Ocean Dynamics and Climate, Pilot National Laboratory for Marine Science and Technology, Qingdao, China; [4] Institute of Marine Science, Shantou University, Shantou, China; [5] Laboratory for Coastal Ocean Variation and Disaster Prediction, College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang, China; [6] Guangdong Key Laboratory of Climate, Resources and Environment in Continental Shelf Sea and Deep Ocean, Zhanjiang, China; [7] Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; [8] University of Chinese Academy of Sciences, Beijing, China

年份：2023

卷号：53

期号：2

起止页码：551

外文期刊名：Journal of Physical Oceanography

收录：EI(收录号：20230813612974)、Scopus(收录号：2-s2.0-85148294992)

语种：英文

外文关键词：Data handling - Kinetic energy - Kinetics - Reynolds number

外文摘要：This study focuses on the statistical features of dissipation ux coefcient Γ in the upper South China Sea (SCS). Based on the microscale measurements collected at 158 stations in the upper SCS and derived dissipation rates of turbulent kinetic energy and temperature variance Ε and χT, via a modied method, we estimate Γ and analyze its spatio-temporal variation in an energetic and a quiescent region. We show that Γ is highly variable, which scatters over three orders of magnitude from 10–2 to 101 in both regions. In the energetic region, Γ is slightly greater than in the quiescent region; their median values are 0.23 and 0.17, respectively. Vertically, Γ presents a clear increasing tendency with depth in both regions, though the increasing rate is greater in the energetic region than in the quiescent region. In the upper SCS, Γ positively depends on the buoyancy Reynolds number Reb and negatively depends on the ratio of the Ozmidov scale to the Thorpe scale ROT and is scaled as (Equation presented), which holds for both regions. The vertical decreasing of ROT is observed, which yields parameterization of ROT = 10–20.002z; this parameterization improves the performance of the Thorpe-scale method by reducing at least 50% of the bias between the observed and parameterized Ε. These results shed new light on the spatiotemporal variability and modulating mechanism of Γ in the upper ocean. ? 2023 American Meteorological Society.