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Analysis of Sea Surface Temperature Cooling in Typhoon Events Passing the Kuroshio Current

Journal of Ocean University of China 2024年第2期23卷 287-303页

作者： HU Yuyi SHAO Weizeng SHEN Wei zuo juncheng JIANG Tao HU Song College of Marine Sciences Shanghai Ocean UniversityShanghai 201306China East China Sea Environment Monitoring Ministry of Natural ResourcesShanghai 201206China China Waterborne Transport Research Institute Ministry of TransportBeijing 100088China

The aim of this study is to investigate the sea surface temperature(SST) cooling as typhoons pass the Kuroshio Current.A numerical circulation model,denoted as the Stony Brook Parallel Ocean Model(sbPOM),was used to simulate the SST,which includes four wave-induced effect terms(i.e.,radiation stress,nonbreaking waves,Stokes drift,and breaking waves) simulated using the third-generation wave model,called WAVEWATCH-Ⅲ(WW3).The significant wave height(SWH) measurements from the Jason-2 altimeter were used to validate the WW3-simulated results,yielding a root mean square error(RMSE) of less than 0.50 m and a correlation coefficient(COR) of approximately *** water temperature measured from the Advanced Research and Global Observation Satellite was applied to validate the model ***,the RMSE of the SST is 0.92℃ with a COR of approximately *** revealed in the sbPOM-simulated SST fields,a reduction in the SST at the Kuroshio Current region was observed as a typhoon passed,although the water temperature of the Kuroshio Current is relatively *** variation of the SST is consistent with that of the current,whereas the maximum SST lagged behind the occurrence of the peak ***,the Stokes drift plays an important role in the SST cooling after analyzing four wave-induced terms in the background of the Kuroshio *** sensitivity experiment also showed that the accuracy of the water temperature was significantly reduced when including breaking waves,which play a negative role in the inside part of the *** variation in the mean mixing layer depth(MLD) showed that a typhoon could enhance the mean MLD in the Kuroshio Current area in September and October,whereas a typhoon has little influence on the mean MLD in the Kuroshio Current area in ***,the mean MLD rapidly decreased with the weakening of the strong wind force and wave-induced effects when a typhoon crossed the Kuroshio Current.

关键词： typhoon wave sea surface temperature Kuroshio Current

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六横岛邻近海域潮汐潮流特征分析

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海洋湖沼通报 2024年第2期46卷 71-81页

作者：孙永钊纪棋严苏毓张洁彭腾腾左军成浙江海洋大学海洋科学与技术学院浙江舟山316022 上海海洋大学海洋科学与生态环境学院上海201306

基于FVCOM海洋模式,对六横岛邻近海域建立高分辨率的三维海洋数值模型。精细化模拟了六横岛邻近海域潮汐、潮流的主要特征,模式结果同1个验潮站与2个测流站观测资料吻合明显,可以反映六横岛邻近海域潮汐、潮流运动特征,同时给出了M_(2)... 详细信息

基于FVCOM海洋模式,对六横岛邻近海域建立高分辨率的三维海洋数值模型。精细化模拟了六横岛邻近海域潮汐、潮流的主要特征,模式结果同1个验潮站与2个测流站观测资料吻合明显,可以反映六横岛邻近海域潮汐、潮流运动特征,同时给出了M_(2)、S_(2)、K_(1)、O_(1)、M_(4)、M_(6)等4个主要分潮同潮图与表层潮流椭圆空间分布以及2个浅水分潮同潮图,并分析了潮汐类型系数、最大可能潮差以及潮汐不对称现象分析,最后分析了涨急、落急、涨憩、落憩等经典潮况的表层流场以及表层、0.6 h层、底层的余流空间分布。分析表明,M_(2)、S_(2)、O_(1)分潮均呈南高北低的分布特征,空间分布上M_(2)、S_(2)、O_(1)振幅分别为115~145、15~30、19~24 cm,而K_(1)分潮空间分布无显著特征,振幅在20~30 cm,且主要分潮传播方向一致,均以东海前进波形式传入,对M_(4)、M_(6)分潮振幅分别为2~20、1~6 cm,同时空间分布特征和传播方向与主要分潮相反。基于调和分析结果计算潮型系数与最大可能潮差,整个海域呈正规半日潮性质且最大可能潮差南部海域可达600~650 cm,北部海域则在450~550 cm;通过计算潮汐不对称性,六横南部海域落潮速度大于涨潮速度,北部相反。4个潮况下,落急流场最大,最大可达220 cm/s,而四个主要分潮最大流速分别在160、60、22、12 cm/s,空间分布上均为外海旋转流、近岸往复流的特征;余流的分布上,表层、0.6 h层、底层在岬角处最大可达25 cm/s,但随水深升高余流逐渐减弱。

关键词： FVCOM 调和分析潮汐不对称现象潮流椭圆余流

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Analysis of Sea Surface Temperature Cooling in Typhoon Events Passing the Kuroshio Current

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Journal of Ocean University of China 2024年第2期

作者： HU Yuyi SHAO Weizeng SHEN Wei zuo juncheng JIANG Tao HU Song

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HY-1C Coastal Zone Imager observations of the suspended sediment content distribution details in the sea area near Hong Kong-Zhuhai-Macao Bridge in China

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Acta Oceanologica Sinica 2022年第11期41卷 126-138页

作者： Lina Cai Minrui Zhou Xiaojun Yan Jianqiang Liu Qiyan Ji Yuxiang Chen juncheng zuo Marine Science and Technology College Zhejiang Ocean UniversityZhoushan 316004China Key Laboratory of Space Ocean Remote Sensing and Application Ministry of Natural ResourcesBeijing 100081China South China Sea Fisheries Research Institute Chinese Academy of Fishery SciencesGuangzhou 510300China College of Marine Sciences Shanghai Ocean UniversityShanghai 201306China

The impacts of the Hong Kong-Zhuhai-Macao Bridge(HKZMB)on suspended sediment content(SSC)were analysed in the Zhujiang River Estuary based on data from HY-1C,which was launched in September 2018 in China,carrying Coastal Zone Imager(CZI)and Chinese Ocean Color and Temperature Scanner on it.A new SSC inversion model was established based on the relationship between in-situ SSC and the remote sensing reflectance in red and near-infrared bands of CZI ***-1C satellite data obtained from October to December 2019 were applied to retrieve SSC in the Zhujiang River *** results show that SSC around the HKZMB is ranging from 20 mg/L to 95 mg/*** change obviously on two sides of the *** flooding and ebbing period,SSC increases obviously downstream of the *** difference between upstream and downstream is ranging from 5 mg/L to 20 mg/*** flowing across the HKZMB,the change trend of SSC in most places upstream and downstream is almost the same that SSC downstream of the bridge is higher than SSC *** tidal currents interact with bridge piers,inducing vortexes downstream,leading the sediment to re-suspend downstream of the bridge *** factors,including seafloor topography and wind,can also contribute to the distribution of SSC in the Zhujiang River Estuary.

关键词： HY-1C Coastal Zone Imager(CZI) Hong Kong-Zhuhai-Macao Bridge suspended sediment content Zhujiang River Estuary

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Role of ocean upper layer warm water in the rapid intensification of tropical cyclones: A case study of typhoon Rammasun(1409)

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Acta Oceanologica Sinica 2016年第3期35卷 63-68页

作者： SUN Jia zuo juncheng LING Zheng YAN Yunwei Key Laboratory of Coastal Disaster and Defence of Ministry of Education Hohai University Institute of Physical Oceanography Hohai University State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyState Oceanic Administration

Rammasun intensified rapidly from tropical storm to super typhoon in the northern South China Sea（NSCS）before its landfall on Hainan Island. Analysis of observed data shows that the anomalous ocean upper layer warm water（WW） is important to the rapid intensification of Rammasun. During the period of Rammasun, sea surface temperature（SST） in the NSCS was much warmer than the climatological SST. The anomalous WW supplied more energy to Rammasun, resulting in its rapid intensification. Numerical simulations further confirm that the NSCS WW plays an important role in the rapid intensification of Rammasun. As the WW is removed, the intensification of Rammasun is only 25 h Pa, which is 58.1% of that in the original SST-forced run.

关键词： tropical cyclone Rammasun rapid intensification warm water sea surface temperature

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Role of surface warming in the northward shift of tropical cyclone tracks over the South China Sea in November

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Acta Oceanologica Sinica 2017年第5期36卷 67-72页

作者： SUN Jia WANG Guihua zuo juncheng LING Zheng LIU Dahai The First Institute of Oceanography State Oceanic AdministrationQingdao 266061China Laboratory for Regional Oceanography and Numerical Modeling Qingdao National Laboratory for Marine Science and TechnologyQingdao 266061China Institute of Atmospheric Sciences Department of Environmental Science and EngineeringFudan UniversityShanghai 200433China Key Laboratory of Coastal Disaster and Defense of Ministry of Education Hohai UniversityNanjing 210098China Guangdong Key Laboratory of Coastal Ocean Variability and Disater Prediction Guangdong Ocean UniversityZhanjiang 524088China

Tropical cyclones （TCs） formed in the Northwest Pacific Ocean （NWP） can cross the South China Sea （SCS） sometimes. It is found that the TC tracks in the SCS in November are shifted to the north after 1980 compared with those before 1980. Both data analyses and numerical simulations show that the surface warming in the SCS may contribute to this more northward shift. The warming produces a cyclonic atmosphere circulation anomaly in the northwestern SCS and an associated southerly in the central SCS steering the TCs to the north.

关键词： tropical cyclone track South China Sea sea surface temperature

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Establishment of ocean dumping area capacity assessment model

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Acta Oceanologica Sinica 2016年第1期35卷 106-113页

作者： WANG Zhizu zuo juncheng XU Ren JIN zuowen CHEN Meixiang Key Laboratory of Coastal Disaster and Protection Ministry of Education Hohai University Nanjing 210000 China The State Oceanic Administration the East China Sea Environmental Monitoring Center Shanghai 200137 China East China Sea Branch of State Oceanic Administration Shanghai 200137 China

Dumping area capacity is mainly affected by the hydrodynamic process （tidal sediment, storm surge and wave, etc.） as well as the size and depth of dumping area. Based on three-dimensional ocean circulation model known as FVCOM （Finite Volume Coast and Ocean Model） and the stochastic dynamic statistical analysis model, taking advantage of dumping ground topography evolution and dumping quantity, the author aims to discuss the influence of hydrodynamic processes and dumping activity so as to built a new model of ocean dumping area capacity. With the data of depth and dumped amount in the dumping area, the changes of bottom topographic which caused by tidal current under the natural condition based on the FVCOM hydrodynamic and sediment module, the author strive to analyze the statistical relation of the changes for dumping amount, tidal current and bottom topographic. Through real data to fit revision coefficient values, which will be regarded as topographic changes reference value affected by wave and storm surges. Thus taking this evaluation as the long-term changes in the dumping capacity. In the premise of setting up the threshold of bottom topographic changes, the dumping area capacity is calculated. Take Yangtze Estuary No. 1 dumping area as an example, As the water depth reduces by 0.5 m annually, the dumping area capacity is about 6.7 million m3/a, the model results are in reasonable agreement with the actual amount. Then the model is validated in Luoyuan Bay dumping area, Shengsishangchuan Mountain dumping area, Dongding dumping area, Dongshan dumping area, and Wenzhou Port dumoin~ area. it is turns out the results are similar to that of the actual observations.

关键词： capacity long term changes assessment model FVCOM

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Responses of estuarine salinity and transport processes to sea level rise in the Zhujiang(Pearl River) Estuary

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Acta Oceanologica Sinica 2016年第5期35卷 38-48页

作者： CHEN Yuxiang zuo juncheng ZOU Huazhi ZHANG Min ZHANG Kairong Key Laboratory of Coastal Disaster and Defence of Ministry of Education Hohai University Key Laboratory of the Zhujiang Estuarine Dynamics and Associated Process Regulation Ministry of Water Resources South China Sea Marine Prediction Center State Oceanic Administration Yalong River Hydropower Development Co. Ltd.

Understanding the changes of hydrodynamics in estuaries with respect to magnitude of sea level rise is important to understand the changes of transport process. Based on prediction of sea level rise over the 21st century, the Zhujiang（Pearl River） Estuary was chosen as a prototype to study the responses of the estuary to potential sea level rise. The numerical model results show that the average salt content, saltwater intrusion distance, and stratification will increase as the sea level rises. The changes of these parameters have obvious seasonal variations. The salt content in the Lingdingyang shows more increase in April and October（the transition periods）. The saltwater intrusion distance has larger increase during the low-flow periods than during the highflow periods in the Lingdingyang. The result is just the opposite in Modaomen. The stratification and its increase are larger during the low-flow periods than during the high-flow periods in Lingdingyang. The response results of transport processes to sea level rise demonstrate that：（1） The time of vertical transport has pronounced *** increased tidal range and currents would reinforce the vertical mixing, but the increased stratification would weaken the vertical exchange. The impact of stratification changes overwhelms the impact of tidal changes. It would be more difficult for the surface water to reach the bottom.（2） The lengthways estuarine circulation would be strengthened. Both the offshore surface residual current and inshore bottom residual current will be *** whole meridional resident flow along the transect of the Lingdingyang would be weakened. These phenomena are caused by the decrease of water surface slope（WWS） and the change of static pressure with the increase of water depth under sea level rise.

关键词： sea level rise salinity stratification transport process Zhujiang Estuary

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Preface:The variation of marine environment and climate effect in Indo-Pacific Ocean

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Journal of Oceanology and Limnology 2020年第6期38卷 1599-1601页

作者： zuo juncheng WANG Weiqiang WANG Guihua XIE Qiang Marine Science and Technology College Zhejiang Ocean UniversityZhoushan 316022China State Key Laboratory of Tropical Oceanography South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Institute of Atmospheric Sciences Fudan UniversityShanghai 200438China Institute of Deep-sea Science and Engineering Chinese Academy of SciencesSanya 572000China

In the backgroumd of global change,tbe vanibility of the marine eoviroument and the resulting climate effects in the Asia-Pacifc region and the Indian Ocean have become inceasingly *** research om climate effects has ... 详细信息

关键词： climate marine Indian

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Assessing the global averaged sea-level budget from 2003 to 2010

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Acta Oceanologica Sinica 2013年第10期32卷 16-23页

作者： LI Juan zuo juncheng CHEN Meixiang TAN Wei YANG Yiqiu Key Laboratory of Ministry of Education for Coastal Disaster and Defence Hohai University

A global mass balance （Greenland and Antarctica ice sheet mass loss, terrestrial water storage） and differ- ent sea-level components （observed sea-level from satellite altimetry, steric sea-level from Ishii data, and ocean mass from gravity recovery and climate experiment, GRACE） are estimated, in terms of seasonal and interannual variabilities from 2003 to 2010. The results show that a detailed analysis of the GRACE time series over the time period 2003-2010 unambiguously reveals an increase in mass loss from the Greenland ice sheet and Antarctica ice sheet. The mass loss of both ice sheets accelerated at a rate of （392.8±70.0） Gt/a during 2003-2010, which contributed （1.09±0.19） mm/a to the global mean sea-level during this time. The net terrestrial water storage （TWS） trend was negative over the 8 a time span, which gave a small positive contribution of （0.25±0.12） mm/a. The interannual variability of the global mean sea-level was at least part- ly caused by year-to-year variability of land water storage. Estimating GRACE-based ice sheet mass balance and terrestrial water storage by using published estimates for melting glaciers, the results further show that the ocean mass increase since 2003 has resulted half from an enhanced contribution of the polar ice sheets, and half from the combined ice sheet and terrestrial water storage loss. Taking also into account the melt- ing of mountain glaciers （0.41 mm/a） and the small GRACE-based contribution from continental waters （0.25 mm/a）, a total ocean mass contribution of （1.75±0.57） mm/a from 2003 to 2010 is found. Such a value represented 75% of the altimetry-based rate of sea-level rise over that period. The contributions to steric sea-level （i.e., ocean thermal expansion plus salinity effects） are estimated from：（1） the difference between altimetry-based sea-level and ocean mass change and （2） the latest Ishii data. The inferred steric sea-level rate from （1）（1.41 mm/a from 2003 to 2010） did not agree well with t

关键词： sea-level ice sheet melt terrestrial water steric sea-level

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