Coastal upwelling in summer 2000 in the northeastern South China Sea
Coastal upwelling in summer 2000 in the northeastern South China Sea
复制标题
2000年夏季南海东北部沿岸上升流
DOI：
10.1029/2011jc007465
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发表时间：
2012-04
影响因子：
--
通讯作者：
Wu, Risheng
中科院分区：
文献类型：
--
作者：
Wang, Dongxiao;Zhuang, Wei;Xie, Shang-Ping;Hu, Jianyu;Shu, Yeqiang;Wu, Risheng
利用水文、验潮、近底系泊和卫星观测资料，结合数值环流模式，对2000年夏季南海东北部福建、广东沿岸的沿岸上升流进行了研究。在整个调查区域内，地下上升流现象主要存在于底边界附近。它与沿岸海平面波动密切相关，而沿岸海平面波动明显地受到局地风强迫和大尺度环流的调制。水深测量后的东北向内部气流随着沿海海平面的下降而加速，并导致汕头以西陆架底边界层向岸输送和随后的冷却。在汕头以东，近底流转向偏东，与海岸线平行，并将近岸冷水团输送到福建南部沿岸。跨陆架平流冷水并不总是穿透层结到达表层。当地风具有相当大的天气变化。海表温度的下降在东山-汕头一带最为显著，时间上呈间歇性，在西南沿岸风的天气过程中下降幅度最大。在西面，源自珠江的淡水舌形成了一个屏障层，导致淡水羽流的表面温度很高。本研究的观测证据和模拟结果为进一步了解南海上升流过程的生态效应提供了重要信息。
Using a combination of hydrographic, tide-gauge, near-bottom mooring, and satellite observations; and a numerical circulation model, we investigate the coastal upwelling in the northeastern South China Sea (NSCS) off the coast of Fujian and Guangdong Provinces, China, in the summer of 2000. Subsurface upwelling phenomenon exists mainly near the bottom boundary in the whole region investigated. It is closely related to the coastal sea level fluctuations, which are evidently modulated by both the local wind-forcing and the large-scale circulation. The northeastward interior flow following the bathymetry is accelerated by the drop of coastal sea level and leads to onshore transport and subsequent cooling in the bottom boundary layer (BBL) over the shelf west of Shantou. To the east of Shantou, the near-bottom flow veers more eastward, parallel to the coastline, and transports the nearshore cold water mass farther to the southern Fujian coast. The cross-shelf advected cold water does not always penetrate through the stratification and reach the surface. The local wind exhibits considerable synoptic variability. The decrease in sea surface temperature (SST) is mostly significant near Dongshan-Shantou, intermittent in time and intensifies preferably during weather events that bring southwesterly alongshore wind. To the west a freshwater tongue originating from the Pearl River forms a barrier layer, which results in high surface temperature in the freshwater plume. The observational evidences and modeled results shown in this study provide important information for further understanding the ecological effects associated with the upwelling processes in the NSCS.
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影响因子：
13.5
作者：
Q. Zheng;V. Klemas
通讯作者：
Q. Zheng;V. Klemas
影响因子：
--
作者：
S. Xie;Q. Xie;Dongxiao Wang;W. Liu
通讯作者：
S. Xie;Q. Xie;Dongxiao Wang;W. Liu
DOI：
10.1016/0198-0254(88)92361-8
发表时间：
1987
期刊：
--
影响因子：
--
作者：
Nd Su
通讯作者：
Nd Su
影响因子：
4.4
作者：
Pawlowicz, R;Beardsley, B;Lentz, S
通讯作者：
Lentz, S
影响因子：
--
作者：
R. Weisberg;B. D. Black;Zhenjiang Li
通讯作者：
R. Weisberg;B. D. Black;Zhenjiang Li