首页|The inter-annual variability of the Yellow Sea Warm Current surface axis and its influencing factors
The inter-annual variability of the Yellow Sea Warm Current surface axis and its influencing factors
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国家科技期刊平台
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Based on the Pathfinder sea surface temperature (PFSST), the surface axis and its pattern of the Yellow Sea Warm Current (YSWC) are discussed. A structure of double-warm-tongue is found in February and it varies in different years. Two indexes are calculated to represent the westward shift (WSI) and northward extension (NEI) of the warm water in the Yellow Sea (YS). Wavelet analysis illustrates that the WSI and NEI have prominent periods of 3-6 years and 3-4 years, respectively. The Empirical Orthogonal Function (EOF) decomposition is applied to the winter wind stress curl and the Kuroshio Current (KC) transport, which are believed to play important roles in forcing the variability of the YSWC surface axis. Statistics shows that the WSI is significantly related with the second EOF mode of the wind stress curl in February, which may force the YSWC surface axis moving westward and maintaining the double warm tongues because of its opposite curl in the YSWC domain. The first EOF mode of wind stress curl in January is propitious for inducing the warm tongue in the YS to advance more northward. Hence, the wind stress curls both in January and in February could force variations of the YSWC surface axis; however, the effect of the January wind stress curl is relatively weaker than that of the February. The relationship between the NEI and the KC transport is remarkable, and it seems that the stronger KC supplies more power to push the YSWC northward against the southward wind.
Yellow SeaYellow Sea Warm Current (YSWC)surface axisinter-annual variabilitysea surface temperature (SST)
SONG Dehai、BAO Xianwen、WANG Xiaohua、XU Lingling、LIN Xiaopei、WU Dexing
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College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China
School of Physical Environmental and Mathematical Sciences, University of New South Wales at Australian Defence Force Academy, Canberra, ACT2600, Australia
Shandong Maritime Safety Administration, Qingdao 266002, China
国家重点基础研究发展规划(973计划)国家高技术研究发展计划(863计划)China International Science and Technology Cooperation Program
国家科技期刊平台
NSTL
万方数据
维普
