An asymmetric upwind flow, Yellow Sea Warm Current : 1. New observations in the western Yellow Sea
MetadataShow full item record
KeywordYellow Sea Warm Current
The winter water mass along the Yellow Sea Trough (YST), especially on the western side of the trough, is considerably warmer and saltier than the ambient shelf water mass. This observed tongue-shape hydrographic feature implies the existence of a winter along-trough and onshore current, often referred to as the Yellow Sea Warm Current (YSWC). However, the YSWC has not been confirmed by direct current measurements and therefore skepticism remains regarding its existence. Some studies suggest that the presence of the warm water could be due to frontal instability, eddies, or synoptic scale wind bursts. It is noted that in situ observations used in most previous studies were from the central and eastern sides of the YST even though it is known that the warm water core is more pronounced along the western side. Data from the western side have been scarce. Here we present a set of newly available Chinese observations, including some from a coordinated effort involving three Chinese vessels in the western YST during the 2006–2007 winter. The data show unambiguously the existence of the warm current on the western side of YST. Both the current and hydrography observations indicate a dominant barotropic structure of YSWC. The westward deviation of YSWC axis is particularly obvious to the south of 35°N and is clearly associated with an onshore movement of warm water. To the north of 35°N, the YSWC flows along the bathymetry with slightly downslope movement. We conclude that the barotropic current is mainly responsible for the warm water intrusion, while the Ekman and baroclinic currents play an important but secondary role. These observations help fill an observational gap and establish a more complete view of the YSWC.
Author Posting. © American Geophysical Union, 2011. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 116 (2011): C04026, doi:10.1029/2010JC006513.
Suggested CitationArticle: Lin, Xiaopei, Yang, Jiayan, Guo, Jingsong, Zhang, Zhixin, Yin, Yuqi, Song, Xiangzhou, Zhang, Xiaohui, "An asymmetric upwind flow, Yellow Sea Warm Current : 1. New observations in the western Yellow Sea", Journal of Geophysical Research 116 (2011): C04026, DOI:10.1029/2010JC006513, https://hdl.handle.net/1912/4606
Showing items related by title, author, creator and subject.
Shelf-edge frontal structure in the central East China Sea and its impact on low-frequency acoustic propagation Ramp, Steven R.; Chiu, Ching-Sang; Bahr, Frederick L.; Qi, Yiquan; Dahl, Peter H.; Miller, James H.; Lynch, James F.; Zhang, Renhe; Zhou, Ji-Xun (IEEE, 2004-10)Two field programs, both parts of the Asian Seas International Acoustics Experiment (ASIAEX), were carried out in the central East China Sea (28 to 30 N, 126 30 to 128 E) during April 2000 and June 2001. The goal of ...
Slope/shelf circulation and cross-slope/shelf transport out of a bay driven by eddies from the open ocean Zhang, Yu (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2009-09)Interaction between the Antarctic Circumpolar Current and the continental slope/shelf in the Marguerite Bay and west Antarctic Peninsula is examined as interaction between a wind-driven channel flow and a zonally uniform ...
Shelf circulation and cross-shelf transport out of a bay driven by eddies from an open-ocean current. Part I : interaction between a barotropic vortex and a steplike topography Zhang, Yu; Pedlosky, Joseph; Flierl, Glenn R. (American Meteorological Society, 2011-05)This paper examines interaction between a barotropic point vortex and a steplike topography with a bay-shaped shelf. The interaction is governed by two mechanisms: propagation of topographic Rossby waves and advection by ...