DOI: 10.1002/2017JC013474
Scopus记录号: 2-s2.0-85041710920
论文题名: Seasonality of the Mindanao Current/Undercurrent System
作者: Ren Q. ; Li Y. ; Wang F. ; Song L. ; Liu C. ; Zhai F.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 2 起始页码: 1105
结束页码: 1122
语种: 英语
英文关键词: Mindanao Current
; Mindanao Undercurrent
; mooring observation
; seasonal variability
; vertical normal modes
Scopus关键词: Acoustic Doppler Current Profiler
; annual variation
; baroclinic mode
; mesoscale eddy
; mooring system
; oceanic circulation
; oceanic current
; seasonal variation
; seasonality
; simulation
; surface layer
; upper ocean
; wind forcing
; Mindanao Current
; Pacific Ocean
; Pacific Ocean (West)
英文摘要: Seasonality of the Mindanao Current (MC)/Undercurrent (MUC) system is investigated using moored acoustic Doppler current profiler (ADCP) measurements off Mindanao (8°N, 127.05°E) and ocean model simulations. The mooring observation during December 2010 to August 2014 revealed that the surface-layer MC between 50–150 m is dominated by annual-period variation and tends to be stronger in spring (boreal) and weaker in fall. Prominent semiannual variations were detected below 150 m. The lower MC between 150 and 400 m is stronger in spring and fall and weaker in summer and winter, while the northward MUC below 400 m emerges in summer and winter and disappears in spring and fall. In-phase and out-of-phase current anomalies above and below 150 m were observed alternatively. These variations are faithfully reproduced by an eddy-resolving ocean model simulation (OFES). Further analysis demonstrates that seasonal variation of the MC is a component of large-scale upper-ocean circulation gyre, while current variations in the MUC layer are confined near the western boundary and featured by shorter-scale (200–400 km) structures. Most of the MC variations and approximately half of the MUC variations can be explained by the first and second baroclinic modes and caused by local wind forcing of the western Pacific. Semiannual surface wind variability and superimposition of the two baroclinic modes jointly give rise to the enhanced subsurface semiannual variations. The pronounced mesoscale eddy variability in the MUC layer may also contribute to the seasonality of the MUC through eddy-current interaction. © 2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114573
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; University of Chinese Academy of Sciences, Beijing, China; Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO, United States; Function Laboratory for Ocean Dynamics and Climate, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Institute of Oceanographic Instrumentation, Shandong Academy of Sciences, Qingdao, China; College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao, China
Recommended Citation:
Ren Q.,Li Y.,Wang F.,et al. Seasonality of the Mindanao Current/Undercurrent System[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(2)