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A harmonic analyzed parameterization of tide-induced mixing for ocean models 被引量:2
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作者 WEI Zexun sun junchuan +4 位作者 TENG Fei XU Tengfei WANG Yonggang XU Xiaoqing FANG Guohong 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2018年第7期1-7,共7页
The tide-induced mixing plays an important role in the regulation of ocean circulation.Numerical simulation of continental shelf circulation is found to exhibit an unreasonable vertical thermohaline structure without ... The tide-induced mixing plays an important role in the regulation of ocean circulation.Numerical simulation of continental shelf circulation is found to exhibit an unreasonable vertical thermohaline structure without consideration of tide effects.In this study,we establish a harmonic analyzed parameterization of tide-induced(HAT) mixing,by which means to derive time-depended function of mixing coefficient based on harmonic analysis of the vertical mixing coefficient.By employing HAT mixing parameterization scheme,a series of numerical experiments are conducted for the Yellow Sea.Numerical results show that an ocean circulation model with the HAT mixing involved is capable of reproducing the reasonable thermohaline structure of the Yellow Sea Cold Water Mass,similar to structures produced by explicit tidal forcing on the open boundary.The advantage of the HAT method is its faster computation time,compared with models that directly resolve explicit tidal motion.The HAT parameterization for the tide-induced mixing has potential to improve both the accuracy and efficiency of ocean circulation and climate models. 展开更多
关键词 tide-induced mixing harmonic analysis PARAMETERIZATION ocean circulation models Yellow Sea Cold Water Mass
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Onshore warm tongue and offshore cold tongue in the western Yellow Sea in winter:the evidence 被引量:2
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作者 sun junchuan YANG Dezhou +2 位作者 YIN Baoshu CHEN Haiying FENG Xingru 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2018年第5期1475-1483,共9页
A winter onshore warm tongue extending from the Yellow Sea Warm Current to the southern Jiangsu coast, and an of fshore cold tongue extending from the southern Jiangsu coast to the southwest of Jeju Island(South Korea... A winter onshore warm tongue extending from the Yellow Sea Warm Current to the southern Jiangsu coast, and an of fshore cold tongue extending from the southern Jiangsu coast to the southwest of Jeju Island(South Korea), are newly identified based on the sea-surface temperature from satellite remote sensing, and further confirmed by the distribution of suspended sediments. In addition, there are two obvious thermal fronts associated with the onshore warm tongue and off shore cold tongue. The narrow gap between the two thermal fronts is supposed to be the pathway for the off shore transport of cold coastal water and suspended sediments. The concurrence of onshore warm and of fshore cold tongues suggests the concurrence of onshore and off shore currents in the western Yellow Sea in winter, which seems to be inconsistent with the previously accepted view that, in winter, the Yellow Sea Coastal Current flows from the Old Huanghe Delta to the southwest of Jeju Island. This distinctive phenomenon helps establish an updated view of the circulation in the western Yellow Sea in winter. 展开更多
关键词 onshore warm tongue offshore cold tongue cross-shelf exchange western Yellow Sea
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A fresh look at the deepwater overflow in the Luzon Strait 被引量:2
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作者 ZHU Yaohua sun junchuan +3 位作者 WEI Zexun WANG Yonggang FANG Guohong QU Tangdong 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2017年第5期1-8,共8页
On the basis of the latest version of a U.S. Navy generalized digital environment model (GDEM-V3.0) and World Ocean Atlas (WOA13), the hydraulic theory is revisited and applied to the Luzon Strait, providing a fre... On the basis of the latest version of a U.S. Navy generalized digital environment model (GDEM-V3.0) and World Ocean Atlas (WOA13), the hydraulic theory is revisited and applied to the Luzon Strait, providing a fresh look at the deepwater overflow there. The result reveals that: (1) the persistent density difference between two sides of the Luzon Strait sustains an all year round deepwater overflow from the western Pacific to the South China Sea (SCS); (2) the seasonal variability of the deepwater overflow is influenced not only by changes in the density difference between two sides of the Luzon Strait, but also by changes in its upstream layer thickness; (3) the deepwater overflow in the Luzon Strait shows a weak semiannual variability; (4) the seasonal mean circulation pattern in the SCS deep basin does not synchronously respond to the seasonality of the deepwater overflow in the Luzon Strait. Moreover, the deepwater overflow reaches its seasonal maximum in December (based on GDEM-V3.0) or in fall (October-December, based on the WOA13), accompanied by the lowest temperature of the year on the Pacific side of the Luzon Strait. The seasonal variability of the deepwater overflow is consistent with the existing longest (3.5 a) continuous observation along the major deepwater passage of the Luzon Strait. 展开更多
关键词 Luzon Strait deepwater overflow seasonal variability South China Sea
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全球垂向位移负荷潮模式在渤海、黄海、东海及周边区域的准确度评估
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作者 徐晓庆 魏泽勋 +3 位作者 滕飞 孙俊川 高秀敏 方国洪 《海洋学报》 CAS CSCD 北大核心 2022年第12期19-30,共12页
本研究利用渤海、黄海、东海及周边区域21个GPS站的调和常数资料,对5个全球垂向位移负荷潮模式(FES2014、EOT11a、GOT4.10c、GOT4.8和NAO.99b)在渤海、黄海、东海及周边区域的准确度进行了评估。结果表明,在渤海、黄海、东海及周边区域... 本研究利用渤海、黄海、东海及周边区域21个GPS站的调和常数资料,对5个全球垂向位移负荷潮模式(FES2014、EOT11a、GOT4.10c、GOT4.8和NAO.99b)在渤海、黄海、东海及周边区域的准确度进行了评估。结果表明,在渤海、黄海、东海及周边区域,对于M_(2)分潮,FES2014和EOT11a模式结果准确度相对较高;对于S_(2)分潮,NAO.99b和EOT11a模式结果准确度相对较高;对于K_(1)分潮,EOT11a和FES2014模式结果准确度相对较高;对于O_(1)分潮,EOT11a和GOT4.8模式结果准确度相对较高;对于N_(2)分潮,EOT11a和FES2014模式结果准确度相对较高;对于K_(2)分潮,NAO.99b和FES2014模式结果准确度相对较高;对于P_(1)分潮,EOT11a和GOT4.8模式结果准确度相对较高;对于Q_(1)分潮,FES2014和EOT11a模式结果准确度相对较高。除此之外,本文还简单分析了渤海、黄海、东海及周边区域8个主要分潮的垂向位移负荷潮分布特征。 展开更多
关键词 准确度评估 垂向位移负荷潮模式 渤海、黄海、东海及周边区域 GPS站
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