Tidal Effects on the Bottom Thermal Front of North Yellow Sea Cold Water Mass near Zhangzi Island in Summer 2009

论文摘要

Three seabed-mounted TD/CTD chains and two upward-looking acoustic Doppler current profilers（ADCPs） in the southwest of Zhangzi Island are used and a simultaneous cruise observation in the northern North Yellow Sea（NYS） is conducted to study temperature variation in the bottom thermal front zone of the NYS Cold Water Mass（NYSCWM） during the summer of 2009. In the flood-ebb tidal cycles, the bottom temperature decreases（increases） during flood（ebb） tides, which are dominated by the tidal-current induced horizontal advection. The ebb tide-induced temperature increase is larger than the flood tide-induced temperature decrease due to seasonal warming. In the spring-neap tidal cycles, the temperature and the vertical temperature structure show notable fortnightly variation from 16 July to 25 August. The bottom temperature increases from neap to spring tides and decreases from spring to neap. The Richardson number demonstrates strengthened vertical mixing during spring tides but enhanced stratification during neap tides. The spring-neap variation in vertical shear caused by tidal current is the dominant factor that induces the fortnightly variation in vertical mixing and thus bottom temperature.

论文目录

• 1 Introduction
• 2 Observations
•   2.1 Study Area and Measurements
•   2.2 Data Processing and Methods
• 3 Results
•   3.1 Bottom Temperature and Salinity Distribution in Northern NYS
•   3.2 Temperature Variation in the TF Zone
•     3.2.1 Seasonal variation
•     3.2.2 Tidal variations in the water column
•     3.2.3 Temperature variation in BTF
• 4 Discussion
•   4.1 Flood-Ebb Tidal Variation
•   4.2 Spring-Neap Tidal Variation
• 5 Conclusions

文章来源

类型: 期刊论文

作者: XIA Yingying,BAO Xianwen,SONG Dehai,DING Yang,WAN Kai,YAN Yuhan

来源: Journal of Ocean University of China 2019年04期

年度: 2019

分类: 基础科学

专业: 海洋学

单位: Key Laboratory of Physical Oceanography, Ministry of Education, Ocean University of China, and Qingdao National Laboratory for Marine Science and Technology,College of Oceanic and Atmospheric Sciences, Ocean University of China,Beihai Offshore Engineering Survey Institute,State Oceanic Administration

基金: supported by the National Natural Science Foundation of China (Nos. U1706215,41506012,41430963 and 41606005)

分类号: P731.2

页码: 751-760

总页数: 10

文件大小: 1609K

下载量: 27