Effects of the Yellow Sea Warm Current on the winter temperature distribution in a numerical model
Effects of the Yellow Sea Warm Current on the winter temperature distribution in a numerical model
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DOI：
10.1029/2005jc003171
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发表时间：
2006-11
影响因子：
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通讯作者：
Jian Ma;F. Qiao;Changshui Xia;Chang S. Kim
中科院分区：
文献类型：
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作者：
Jian Ma;F. Qiao;Changshui Xia;Chang S. Kim
[1]利用一个波浪-潮汐-环流耦合数值模式研究了黄海的温度分布和环流特征。该模式较好地再现了黄海暖流暖舌结构的变化，即从1月份沿YS海槽和西部60 m等深线沿着的双支流到3月份沿西部温度锋沿着的单支流。这一点在近年的长期月气候和卫星海洋表面温度图像中都有观察到。通过对整个冷却期数值模式中局部热量平衡的分析，发现黄海西南风对黄海暖舌结构有着重要的影响。与地面冷却相比，平流的影响在沿海浅区较小，但在暖舌区较深处较大（可达热通量大小的50%）。虽然水深是温度锋形成的基本因素，但YSWC是定位、塑造和维持暖舌结构的关键因素。这有助于确认YSWC的存在，至少作为月平均流量。然而，更多的高分辨率电流观测在济州岛西部和YS槽的西叉更深的层需要确认的存在YSWC和它的特征时间尺度在真实的YS。
[1] The temperature distribution and circulation patterns in the Yellow Sea (YS) are examined by using a wave-tide-circulation coupled numerical model. This model sufficiently reproduces the variation of the warm tongue structure of the Yellow Sea Warm Current (YSWC) from the double branches flowing along the YS Trough and the western 60 m isobath in January to the single stream along the western temperature front in March. This is observed in both the long-term monthly climatology and the satellite-based sea surface temperature images in recent years. Examining the local heat balance in the numerical model during the entire cooling period, it is found that the YSWC has a very important influence on the YS warm tongue structure. Compared with the surface cooling, the influence of the advection is small in the coastal shallow area but large in the deep warm tongue area (up to 50% of the magnitude of heat flux). Although bathymetry is the essential factor which causes the temperature front, the YSWC is the key factor which positions, shapes, and maintains the warm tongue structure. This helps to affirm the existence of the YSWC, at least as a monthly mean flow. However, more high-resolution current observations in deeper layers west of Cheju Island and the western fork of the YS Trough are needed to confirm the existence of the YSWC and its characteristic timescale in the real YS.