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STRAIT STRAINS INTO STRIDES The prolonged Strait of Hormuz crisis has sent oil prices soaring and exposed ASEAN's structural vulnerabilities,turning an external shock into a regional test of energy resilience 认领 引用
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作者 Huang Jiangqin 《China Report ASEAN》 2026年第5期44-47,共4页
The Strait of Hormuz crisis has now entered its second month,with international oil prices fluctuating at elevated levels between US$100 and US$120 per barrel.The repercussions of the conflict in the Middle East are r... The Strait of Hormuz crisis has now entered its second month,with international oil prices fluctuating at elevated levels between US$100 and US$120 per barrel.The repercussions of the conflict in the Middle East are rapidly spreading across the globe. 展开更多
关键词 Structural Vulnerabilities Straits Energy Resilience ASEAN Crisis strait hormuz crisis Middle East Conflict Strait Hormuz
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SWOT observation revealed internal solitary wave characteristic variations in the Lombok Strait 认领 引用 被引量：1
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作者 Xiaochen WANG Jing WANG +1 位作者 Xudong ZHANG Jiaxin LIU 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2026年第1期71-84,共14页
Internal solitary waves(ISWs)are an essential dynamic process in the ocean due to their large amplitude and long propagation distance.Traditional satellite observations provide only twodimensional observations of ocea... Internal solitary waves(ISWs)are an essential dynamic process in the ocean due to their large amplitude and long propagation distance.Traditional satellite observations provide only twodimensional observations of ocean signatures induced by ISWs.The Surface Water and Ocean Topography(SWOT)satellite has drawn significant attention due to its high resolution and threedimensional observation capabilities.SWOT can generate high-precision three-dimensional sea surface topography,capture sea surface undulations,and reveal ISW-related surface oscillations,thus offering a new perspective for studying ISWs.We collected 43 SWOT observations with clear ISW signatures in the Lombok Strait from August 2023 to June 2024.Based on collected data,the ISW imaging characteristics and distributions were analyzed,and the ISW-related sea level anomaly(SLA)data were measured by the SWOT to calculate the ISW amplitude and reveal the amplitude variations during the propagation along the wave crest.The ISW amplitudes generally range between 10 and 100 m,with most ISW amplitudes between 20 and 40 m.By analyzing two consecutive generated ISW packets,we identified the spreading effect along ISW wave crests,which manifests as ISW amplitude decrease with increase in propagation distance,and the amplitude distribution is non-uniform along the wave crest.Further analysis of the propagation paths of the maximum amplitude of ISW moving northward through the Lombok Strait revealed that these maxima are predominantly oriented in northeast direction.Finally,the relationship between the amplitude of ISW and the resulting SLA was analyzed.The Pearson correlation coefficient between these two variables is as high as 0.90,which suggests a strong positive correlation between amplitude and SLA.Furthermore,this relationship is closely related to the water depth,indicating that the three-dimensional sea surface observations provided by SWOT offer crucial observational data for the inversion of amplitudes of ISW. 展开更多
关键词 internal solitary wave(ISW) Surface Water and Ocean Topography(SWOT) amplitude Lombok Strait
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Onset and decay mechanisms of the Summer 2024 extreme marine heatwave in the Taiwan Strait 认领 引用
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作者 Ruizhao Xia Yun Qiu +1 位作者 Xinyu Lin Shihan Li 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2026年第2期73-86,共14页
In recent decades,the frequency and intensity of marine heatwaves(MHWs)in the Taiwan Strait have increased significantly.In the summer of 2024,the Taiwan Strait experienced the most intense MHW on record,with a maximu... In recent decades,the frequency and intensity of marine heatwaves(MHWs)in the Taiwan Strait have increased significantly.In the summer of 2024,the Taiwan Strait experienced the most intense MHW on record,with a maximum intensity of 2.88℃and a cumulative intensity of 124.15℃·d,posing a severe risk of coral bleaching.During the onset phase,the sea surface temperature(SST)exhibited a clear quasibiweekly oscillation pattern,with the most pronounced warming occurring in the northern waters off the Penghu Islands.The anomalous westward extension and intensification of the western North Pacific Subtropical High(WNPSH)led to reduced cloud cover over the Taiwan Strait,enhancing incoming shortwave radiation(with an average positive anomaly of 29.5 W/m2).The regional mean temperature was 0.10℃/d,which was driven primarily by the net surface heat flux(0.08℃/d),with shortwave radiation(0.05℃/d)being the dominant contributor.In addition,the intensified southwesterly summer monsoon strengthened northeastward warm advection,jointly driving widespread SST increases in the region.During the decay phase,Typhoon Gaemi passed through the Taiwan Strait,inducing significant surface cooling.The decrease in SST was dominated by negative anomalies in net surface heat flux,primarily latent heat loss(−0.16℃/d,with latent heat flux contributing−0.13℃/d).Enhanced atmosphere-ocean interactions under the typhoon and intensified entrainment(−0.05℃/d)jointly drove the rapid termination of the MHW. 展开更多
关键词 atmosphere-ocean interaction marine heatwave sea surface temperature Taiwan Strait extreme events
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Seasonal cycles of the ocean bottom pressure in the South China Sea and the Luzon Strait deepwater overflow 认领 引用
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作者 Guijun LIU Yu WANG 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2026年第2期560-569,共10页
Driven by the persistent baroclinic pressure difference,the Luzon Strait deepwater overflow(LSDO)from the Pacific into the South China Sea(SCS)plays an influential role in the dynamical processes in the deep SCS.Based... Driven by the persistent baroclinic pressure difference,the Luzon Strait deepwater overflow(LSDO)from the Pacific into the South China Sea(SCS)plays an influential role in the dynamical processes in the deep SCS.Based on the ocean bottom pressure(OBP)data,seasonal cycles of the OBP anomalies in the SCS and the LSDO are presented.On the seasonal scale,for shelf areas shallower than 200 m,the OBP anomalies are regulated by the wind stress curls:negative curls in winter lead to the Ekman convergences and the ensuing positive OBP anomalies and vice versa for positive curls in summer,while for the deep basin deeper than 2000 m,the OBP anomalies show spatial consistency in sign:negative in winter and spring as well as positive in summer and autumn.The seasonal cycle of the LSDO is revealed and found to be mainly due to baroclinic processes east of the Luzon Strait.Along 21.25°N,significant seasonal signals extend downward and westward,reaching about 2500-m depth at 124°E,and phase isolines are parallel to this extending.These facts suggest that the seasonal variability of the LSDO might originate from the upper ocean and meridional mode Rossby waves could be a possible dynamical mechanism. 展开更多
关键词 seasonal cycle ocean bottom pressure(OBP) South China Sea(SCS) Luzon Strait deepwater overflow(LSDO) vertically propagating Rossby wave
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Geochemical Compositions and Transport Patterns of Surface Sediments from the Malacca Strait 认领 引用 被引量：1
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作者 AI Lina LIU Shengfa +6 位作者 ZHANG Hui CAO Peng LI Xue QI Wenjing WU Kaikai MOHAMED Che Abd Rahim SHI Xuefa 《Journal of Ocean University of China》 SCIE CAS CSCD 2025年第6期1613-1623,共11页
The Malacca Strait(MS)is a vital conduit for the exchange of water and sediment between the Indian Ocean and the Pacific Ocean,serving as a critical‘gateway'for sediment transport.Here,we present the geochemical ... The Malacca Strait(MS)is a vital conduit for the exchange of water and sediment between the Indian Ocean and the Pacific Ocean,serving as a critical‘gateway'for sediment transport.Here,we present the geochemical characteristics of surface sediments in the MS to elucidate the relationship between terrestrial material inputs and modern oceanic dynamic transport processes in the strait.The results reveal that the MS can be divided into three distinct geochemical provinces.ProvinceⅠ,located in the central region of the strait,is characterized by residual deposits.The preservation of these residual deposits can be attributed to the restricted sediment supply and the relatively weaker modern sedimentary hydrodynamic conditions.ProvinceⅡ,situated to the north of ProvinceⅠ,exhibits provenance differences between its southern and northern regions.The northern region is primarily supplied by sediments originating from the eastern shelf of the Andaman Sea,whereas sediments derived from Sumatra and the Sunda Shelf are predominantly deposited in the southern part of ProvinceⅡ.ProvinceⅢextends along the western coast of the Malaysian Peninsula,with sediments primarily sourced from the Malaysian Peninsula and the Sunda Shelf,while contributions from Sumatra and the eastern shelf of the Andaman Sea are negligible.River sediments from the Malaysian Peninsula and Sumatra are transported northwestward along their respective coasts by prevailing currents,which also facilitate the transportation of Sunda Shelf sediments within the strait,while sediments from the eastern shelf of the Andaman Sea are delivered to the MS via southward coastal currents during the southwest monsoon period.The southward currents and well-developed eddies potentially impede the northward transport of sediments from the Sunda Shelf and restrict the distribution of Andaman Sea sediments within the strait.This study substantially enhances the understanding of source-to-sink processes in the Indo-Pacific region. 展开更多
关键词 surface sediment geochemical composition provenance sedimentation Malacca Strait
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Response of sea-surface partial pressure of CO2to ENSO events over the Taiwan Strait 认领 引用
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作者 Keyu Hu Qiong Wu +4 位作者 Tianqi Xiong Bo Li Peng Bai Zhenxin Ruan Chengcheng Yu 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2025年第6期42-53,共12页
El Niño-Southern Oscillation(ENSO)affects the changes in ocean physical elements in Taiwan Strait(TWS)primarily by regulating the strength of the East Asian Winter Monsoon(EAWM)and the intrusion of the Kuroshio.A... El Niño-Southern Oscillation(ENSO)affects the changes in ocean physical elements in Taiwan Strait(TWS)primarily by regulating the strength of the East Asian Winter Monsoon(EAWM)and the intrusion of the Kuroshio.Additionally,the fluctuating impact between nutrient-poor seawater with high dissolved inorganic carbon(DIC)that infiltrates owing to the Kuroshio during El Niño phases and nutrient-rich seawater with low DIC from the South China Sea(SCS)carried by the EAWM during La Niña phases determines the nutrient content in TWS,thereby sculpting appropriate or unsuitable biochemical environment.In this study,based on high-resolution sea-surface partial pressure of carbon dioxide(pCO2)data,we investigate the relationship between pCO2level of TWS and ENSO events in winter.The physical mechanisms affecting the anomalous distribution of pCO2level during ENSO are also explored.Stepwise regression was employed to identify the optimal influencing factors for modeling pCO2.Results indicate a significant positive correlation between Niño3.4 index and pCO2,which is significantly influenced by factors such as sea-surface temperature(SST),chlorophyll-a(Chl a),and DIC.These are related to the anomalously strong Kuroshio intrusion and weaker EAWM during El Niño years.It brings a large amount of high SST water with low nutrient concentration and high DIC,which is detrimental to CO2dissolution and phytoplankton growth over the TWS,leading to an increase in pCO2.Conversely,pCO2level is significantly low under the influence of SCS seawater during La Niña years.Based on the characterization of the pCO2level response to ENSO,the carbon balance at TWS can be explored. 展开更多
关键词 sea-surface partial pressure of CO2 El Niño-Southern Oscillation Taiwan Strait East Asian Winter Monsoon Kuroshio
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The role of Luzon Strait transport in shallow meridional overturning circulation of South China Sea 认领 引用
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作者 Kun Jiang Yu Wang +1 位作者 Yan Sun Jian Lan 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2025年第1期28-35,共8页
The impacts of the Luzon Strait transport on shallow meridional overturning circulation(SMOC)in the South China Sea(SCS)have been pointed out by previous studies,but the issue whether the Luzon Strait transport domina... The impacts of the Luzon Strait transport on shallow meridional overturning circulation(SMOC)in the South China Sea(SCS)have been pointed out by previous studies,but the issue whether the Luzon Strait transport dominates the SMOC formation still remains open.The Helmholtz decomposition is applied based on the ocean general circulation model for the earth simulator products to address this issue.Results show that the motion caused by the Luzon Strait transport is characterized as an obvious southward flow between 13°N and 20°N.After this motion being removed,the clockwise winter SMOC and the anticlockwise summer SMOC can still exist significantly.The SMOC existence and its seasonal variation are also reproduced in the numerical simulation with the Luzon Strait closed.Both results of the Helmholtz decomposition and numerical experiment suggest that the SMOC formation and its seasonal variation are not dominated by the Luzon Strait transport.The SCS monsoon is the primary driving factor for the SMOC,which is related to the physical processes within the SCS. 展开更多
关键词 South China Sea Luzon Strait transport shallow meridional overturning circulation Helmholtz decomposition
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Proportion and variability of South China Sea water joining the Indonesian Throughflow in the Makassar Strait 认领 引用
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作者 Shuaichen Xin Mingting Li +1 位作者 Jinchi Xie Dongxiao Wang 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2025年第6期1-14,共14页
The Indonesian Throughflow(ITF),mainly through the Makassar Strait,transports amounts of water and salt from the tropical Pacific Ocean to the Indian Ocean,playing a crucial role in modulating heat and energy budget b... The Indonesian Throughflow(ITF),mainly through the Makassar Strait,transports amounts of water and salt from the tropical Pacific Ocean to the Indian Ocean,playing a crucial role in modulating heat and energy budget between two oceans.The South China Sea Throughflow(SCSTF)significantly contributes to the net transport of the ITF via Karimata Strait and Mindoro-Sibutu Passage.However,the specific proportion and variability of South China Sea(SCS)water joining the ITF are still unclear.Based on high-resolution reanalysis data and a Lagrangian particle tracking method-Connectivity Modelling System(CMS),we quantified the proportion and variability of SCS water joining the ITF in the Makassar Strait.The results show that about 16.41%of the particles released in the Makassar Strait could be back-tracked from the SCS and 42.45%from the western Pacific Ocean.The particles through Mindoro Strait and Karimata Strait are about 10.55%and 3.39%,respectively.About 14.56%and 15.42%particles are trapped in the Sulu and Sulawesi seas.The proportion of SCS water shows significant interannual variability,which is highly related to El Niño-Southern Oscillation(ENSO)events.The correlation coefficient between interannual change of SCS water volume proportion and the Niño 3.4 index is 0.75,with an increase of about 24%during El Niño years and a decrease of about−22%during La Niña years.The proportion also varies with the depth of particles released,showing two peaks at surface and subsurface depths of 5 m and 110 m,respectively. 展开更多
关键词 Indonesian Throughflow(ITF) South China Sea Throughflow(SCSTF) Makassar Strait
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Influencing factors and evaluation application of regional crustal stability in the Bohai Strait 认领 引用 被引量：4
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作者 Sai Mei Hong-xian Chu +5 位作者 Ling-yu Dong Zhong-hua Fang Pan-feng Li Fei-fei Zhang Rui Shan Tie-hu Zhao 《China Geology》 CAS 2019年第3期354-363,共10页
Due to the extremely complex geological conditions in the Bohai Strait, active faults is very developed and earthquake activity occurs frequently. It is of great importance to evaluate the regional crustal stability f... Due to the extremely complex geological conditions in the Bohai Strait, active faults is very developed and earthquake activity occurs frequently. It is of great importance to evaluate the regional crustal stability for the planning and construction of the Trans-straits Passage. In this study, the authors carry out the evaluation by means of buffer analysis, topology analysis and overlay analysis based on ArcGIS software. The evaluation mainly analyzed six assessment factors of Bohai Strait including neotectonic activity, active faults distribution, seismicity, tectonic stress fields, Bouguer gravity anomaly and geological disasters. In brief, the crustal stability of the eastern North Yellow Sea Basin is best, while that of the Bohai Basin and southwest Bohai Strait is poor. Meanwhile, small and frequent earthquakes in the southern Strait and geological disasters developed in the northern and central Strait such as tidal ridge and shallow gas which may adversely impact on the Trans-straits Passage construction. 展开更多
关键词 Regional crustal stability Trans-straits Passage Coastal geological survey Engineering GIS Bohai Strait China
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Sediment bacterial communities are more complex in coastal shallow straits than in oceanic deep straits 认领 引用 被引量：2
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作者 LIU Hongmei WANG Bin HU Xiaoke 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2018年第5期1643-1654,共12页
Straits are ideal models to investigate the bacterial community assembly in complex hydrological environments. However, few studies have focused on bacterial communities in them. Here, comparable bacterial communities... Straits are ideal models to investigate the bacterial community assembly in complex hydrological environments. However, few studies have focused on bacterial communities in them. Here, comparable bacterial communities in costal shallow Bohai Strait(BS) and oceanic deep Fram Strait(FS) were studied. The Shannon and Chao1 indices were both higher in BS than in FS. The relative abundances of the classes Deltaproteobacteria and Bacilli and the family Halieaceae were higher in BS than in FS, in contrast to the families OM1_clade and JTB255_marine_benthic_group, revealing typical characteristics of bacterial communities in coastal and oceanic regions. Cluster analysis based on the Bray-Curtis index showed that samples were clustered by depth layer in FS and BS, indicating that structures of bacterial communities would diff er with increasing water depth in straits. Additionally, the cluster relationships among samples in abundant and rare communities were both similar to those in entire communities. However, the dissimilarities among samples showed a descending order as rare communities, entire communities and abundant communities. Network analysis indicated that the BS network was obviously more complex than the FS network. Filamentous bacteria Desulfobulbaceae exhibited high degree values in BS but not in FS, indicating key roles of Desulfobulbaceae in the BS. Our study provides different and common evidences for understanding microbial ecology in coastal shallow and oceanic deep straits. 展开更多
关键词 bacterial communities Bohai Strait Fram Strait currents microbial ecological network
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Impact of the water input from the eastern Qiongzhou Strait to the Beibu Gulf on Guangxi coastal circulation 认领 引用 被引量：12
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作者 Bo Chen Zhixin Xu +2 位作者 Hanzheng Ya Xianyun Chen Mingben Xu 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2019年第9期1-11,共11页
Based on a comparison of synchronized temperature and salinity data collected in the eastern Qiongzhou Strait and at coastal marine stations, this study finds that, in summer, the variation in salinity near the Weizho... Based on a comparison of synchronized temperature and salinity data collected in the eastern Qiongzhou Strait and at coastal marine stations, this study finds that, in summer, the variation in salinity near the Weizhou Island in Guangxi is similar to that in the eastern and central portions of the Qiongzhou Strait. Additionally, the Beihai Station in Guangxi exhibits a small salinity variation, whereas the Longmen and Bailongwei Stations, both of which are located far from the Qiongzhou Strait, mainly exhibit continental hydrological characteristics in summer. Moreover, a comparison of the multi-year ocean current data from the Qiongzhou Strait and ocean current observations from the Weizhou Island Station and recently installed current-measuring stations shows that the residual current in the Qiongzhou Strait flows westward in winter and summer. The numerical simulation results also indicate that water from the eastern Qiongzhou Strait enters the Beibu Gulf. The characteristics of the temperature and salinity distributions and analyses of the residual currents further confirm that the western Guangdong coastal current is the main source of the westward transport of water in the Qiongzhou Strait. The primary driver of the formation of the western Guangdong coastal current is the westward flow of freshwater from the Zhujiang (Pearl) River. This water enters the Beibu Gulf via the Qiongzhou Strait and enhances the formation of the cyclonic circulation in the northern Beibu Gulf. In summer, the strong influence of the southwesterly wind leads to the formation of a strong northward coastal current along the western coast of the Beibu Gulf. This process promotes the transport of low-salinity diluted water toward the open ocean and the formation of larger- scale cyclonic circulation around Weizhou Island in the eastern Beibu Gulf. The results of this study regarding the effects of the water inflow from the eastern Qiongzhou Strait to the Beibu Gulf on the Guangxi coastal circulation directly challenge conventional conclusions concerning the transport direction of water through the Qiongzhou Strait in winter and summer. 展开更多
关键词 temperature and salinity characteristics circulation mechanism Qiongzhou Strait Guangxi coast
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An overview of 10-year observation of the South China Sea branch of the Pacific to Indian Ocean throughflow at the Karimata Strait 认领 引用 被引量：16
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作者 Zexun Wei Shujiang Li +8 位作者 R.Dwi Susanto Yonggang Wang Bin Fan Tengfei Xu Budi Sulistiyo T.Rameyo Adi Agus Setiawan A.Kuswardani Guohong Fang 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2019年第4期1-11,共11页
Besides the Indonesian throughflow(ITF), the South China Sea throughflow(SCSTF) also contributes to the water transport from the Pacific to the Indian Ocean. However, this South China Sea(SCS) branch at the Karimata S... Besides the Indonesian throughflow(ITF), the South China Sea throughflow(SCSTF) also contributes to the water transport from the Pacific to the Indian Ocean. However, this South China Sea(SCS) branch at the Karimata Strait is poorly observed until 2007, even though its importance has been suggested by numerical studies for decades. In this paper, we review the nearly 10-year field measurement in the Karimata Strait by the execution of the projects of "SCS-Indonesian Seas Transport/Exchange(SITE) and Impacts on Seasonal Fish Migration" and "The Transport, Internal Waves and Mixing in the Indonesian Throughflow regions(TIMIT) and Impacts on Marine Ecosystem", which extend the observations from the western Indonesian seas to the east to include the main channels of the ITF, is introduced. Some major achievements from these projects are summarized. 展开更多
关键词 South China Sea Indonesian seas Indonesian throughflow(ITF) Karimata Strait South China Sea throughflow
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Observations of the Karimata Strait througflow from December 2007 to November 2008 认领 引用 被引量：13
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作者 SUSANTO R Dwi WEI Zexun +3 位作者 ADI Rameyo T FAN Bin LI Shujiang FANG Guohong 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2013年第5期1-6,共6页
In order to quantitatively estimate the volume and property transports between the South China Sea and Indonesian Seas via the Karimata Strait, two trawi-resistant bottom mounts, with ADCPs embedded, were deployed in ... In order to quantitatively estimate the volume and property transports between the South China Sea and Indonesian Seas via the Karimata Strait, two trawi-resistant bottom mounts, with ADCPs embedded, were deployed in the strait to measure the velocity profile as part of the South China Sea-Indonesian Seas trans- port/exchange （SITE） program. A pair of surface and bottom acoustic modems was employed to transfer the measured velocity without recovering the mooring. The advantage and problems of the instruments in this field work are reported and discussed. The field observations confirm the existence of the South Chi- na Sea branch of Indonesian throughflow via the Karimata Strait with a stronger southward flow in boreal winter and weaker southward bottom flow in boreal summer, beneath the upper layer northward （reversal） flow. The estimate of the averaged volume, heat and freshwater transports from December 2007 to March 2008 （winter） is （-2.7±1.1）×10^6 m^3/s, （-0.30±0.11） PW, 2008 （summer） is （1.2±0.6）×10^6 m^3/s, （0.14±0.03） PW, （-0.18±0.07） × 106 m3/s and from May to September （0.12±0.04）×10^6 m^3/s and for the entire record from December 2007 to October 2008 is （-0.5±1.9）×10^6 m^3/s, （-0.05±0.22） PW, （-0.01±0.15）×10^6 m^3/s （nega- tive/positive represents southwardorthward transport）, respectively. The existence of southward bottom flow in boreal summer implies that the downward sea surface slope from north to south as found by Fang et al. （2010） for winter is a year-round phenomenon. 展开更多
关键词 Karimata Strait transport Indonesian throughflow ADCP measurement acoustic modem
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Seasonal variation of water transport through the Karimata Strait 认领 引用 被引量：11
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作者 Yan Wang Tengfei Xu +5 位作者 Shujiang Li R.Dwi Susanto Teguh Agustiadi Mukti Trenggono Wei Tan Zexun Wei 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2019年第4期47-57,共11页
Four trawl-resistant bottom mounts, with acoustic Doppler current profilers(ADCPs) embedded, were deployed in the Karimata Strait from November 2008 to June 2015 as part of the South China Sea-Indonesian Seas Transpor... Four trawl-resistant bottom mounts, with acoustic Doppler current profilers(ADCPs) embedded, were deployed in the Karimata Strait from November 2008 to June 2015 as part of the South China Sea-Indonesian Seas Transport/Exchange and Impact on Seasonal Fish Migration(SITE) Program, to estimate the volume and property transport between the South China Sea and Indonesian seas via the strait. The observed current data reveal that the volume transport through the Karimata Strait exhibits significant seasonal variation. The winteraveraged(from December to February) transport is –1.99 Sv(1 Sv=1×10~6 m^3/s), while in the boreal summer(from June to August), the average transport is 0.69 Sv. Moreover, the average transport from January 2009 to December2014 is –0.74 Sv(the positiveegative value indicates northward/southward transport). May and September are the transition period. In May, the currents in the Karimata Strait turn northward, consistent with the local monsoon. In September, the southeasterly trade wind is still present over the strait, driving surface water northward, whereas the bottom flow reverses direction, possibly because of the pressure gradient across the strait from north to south. 展开更多
关键词 Karimata Strait water transport seasonal variation South China Sea throughflow
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The fundamental characteristics of current in the Bering Strait and the Chukchi Sea from July to September 2003 认领 引用 被引量：8
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作者 LI Lei DU Ling +2 位作者 ZHAO Jinping ZUO Juncheng LI Peiliang 《Acta Oceanologica Sinica》 SCIE CAS 2005年第6期1-11,共11页
The characteristics of current in the Bering Strait and the Chukchi Sea areanalyzed based on the two current data on the mooring stations during the Second National ArcticResearch Expedition of China in 2003. The tida... The characteristics of current in the Bering Strait and the Chukchi Sea areanalyzed based on the two current data on the mooring stations during the Second National ArcticResearch Expedition of China in 2003. The tidal currents of the principal diurnal and semidiurnalellipses rotate clockwise in the upper layer, except for N_2, S_2, and Q_1 at Sta. ST. In the BeringStrait (Sta. ST), the major semi-axis of tidal current constituent M_2 is 2.9 cm/s in the upperlayer, which is much smaller than that of semi-monthly oscillation (11.8 cm/s); and the mean currentflows northwestward at the amplitude of about 20 cm/s and varies a little with depth. During thecruise, the current has significant semi-monthly oscillation at the two mooring stations. Thespectra analyses of the air pressure gradient and the wind stress show that there are thesemi-monthly oscillations in these two data series. The near-inertial current, approximately 4 cm/s,presents almost the same magnitude of the principal tidal currents in the Bering Strait. 展开更多
关键词 tidal current mean current semi-monthly oscillation near-inertial current bering strait and chukchi sea
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Zooplankton composition and distribution in the Lembeh Strait of North Sulawesi, Indonesia 认领 引用 被引量：5
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作者 WANG Yanguo CHEN Xiaoyin +5 位作者 XING Bingpeng SUN Rouxin FITRIA Nurul XIANG Peng WANG Chunguang LIN Mao 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2018年第12期35-44,共10页
Based on oceanographic survey data in June 2012 in the Lembeh Strait, the zooplankton ecological characteristics such as species composition, individual abundance, dominant species and distribution were analyzed. The ... Based on oceanographic survey data in June 2012 in the Lembeh Strait, the zooplankton ecological characteristics such as species composition, individual abundance, dominant species and distribution were analyzed. The results showed that 183 species(including 4 sp.) had been recognized, most of them belonged to copepoda.Cnidaria followed with 43 species(including 1 sp.) were identified. The average abundance of zooplankton was(150.47±58.91) ind./m3. As to the horizontal distribution, the abundance of the zooplankton was higher in the southern waters than in the northern waters. The dominant species in the study area were Lensia subtiloides,Sagitta enflata, Lucifer intermedius, Oikopleura rufescens, Diphyes chamissoni, Creseis acicula, Subeucalanus subcrassus, Temora discaudata, Aglaura hemistoma, Doliolum denticulatum, Canthocalanus pauper, Oikopleura longicauda and Nanomia bijuga. Zooplankton biodiversity indexes were higher in study area than previous study in the other regions. The findings from this study provide important baseline information for future research and monitoring programs. 展开更多
关键词 zooplankton species composition dominant species distribution Lembeh Strait
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Spatial and temporal variability of colored dissolved organic matter absorption properties in the Taiwan Strait 认领 引用 被引量：5
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作者 LIN Hui GUO Weidong +2 位作者 HU Minghui LIN Cai JI Weidong 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2012年第5期98-106,共9页
Spatial and temporal variability of the absorption properties of colored dissolved organic matter （CDOM） in the Taiwan Strait was investigated in summer （July to August of 2006） and winter （from December 2006 to ... Spatial and temporal variability of the absorption properties of colored dissolved organic matter （CDOM） in the Taiwan Strait was investigated in summer （July to August of 2006） and winter （from December 2006 to January of 2007） seasons. The CDOM absorption coefficient at 280 nm （a 280 ） showed a decreasing trend from nearshore to offshore areas while the spectral slope coefficient parameter calculated between wavelengths 275–295 nm （S 275 295 ） showed an increase, indicative of decreasing aromaticity and molecular weight of the CDOM. The average a 280 in winter （1.47 ± 0.50 m ^-1 ） was significantly higher than in summer （1.10 ± 0.41 m ^-1 ）, while the average S 275 295 in winter （26.7 ± 5.2 μm^- 1 ） was significantly lower than in summer （30.6 ± 5.5 μm^- 1 ）, demonstrating clear seasonal variation in CDOM abundance and properties in the Taiwan Strait. A three-end- member conservative mixing model showed that local terrestrial CDOM inputs from several rivers along the western coast were small （〈5%）. However, the distribution of CDOM in the Taiwan Strait is mainly controlled by water mass movement [i.e., the Zhe-min Coastal Current （ZCC） and the Kuroshio Branch Current （KBC） in winter and the South China Sea Water （SCSW） in summer]. Biological activity was also an important factor affecting the distribution of CDOM in the offshore region in summer months. 展开更多
关键词 colored dissolved organic matter absorption properties seasonal variation hydrology Taiwan Strait
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Water mass of the northward throughflow in the Bering Strait in the summer of 2003 认领 引用 被引量：11
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作者 ZHAO Jinping SHI Jiuxin +2 位作者 GAO Guoping JIAO Yutian ZHANG Hongxin 《Acta Oceanologica Sinica》 SCIE CAS 2006年第2期25-32,共8页
The temperature and salinity data obtained by the Chinese national arctic research expedition （CHINARE2003） are used to study the water structure in the Bering Strait and ambient regions. Four water masses appeared ... The temperature and salinity data obtained by the Chinese national arctic research expedition （CHINARE2003） are used to study the water structure in the Bering Strait and ambient regions. Four water masses appeared in the research region： the intermediate Bering Sea water mass （IBWM）, the Alaska coastal water （ACW）, the Anadyr water （AW） and the Bering shelf water （BSW）. The AW originates from the IBWM, but the upper layer water has been greatly altered. In the cruise on 28/29 July 2003, there were only the BSW and ACW in a section across the Bering Strait （BS section）, but in the September 12/13 cruise, the AW, BSW and ACW flowed parallelly into the Bering Strait. The upper waters of these water masses were all altered due to ice melting, runoff, solar radiation, and wind mixing. The waters in the central and northern parts of Bering Strait stratified by two uniform layers,were expressed as the typical feature of the water masses originating from the pacific. A two-layer structure also dominated the vertical stratification in most part of the Chukchi Sea. An obvious subseasonal variation was observed in the BS section, which caused varying transportation of fresh water, heat, and substance, and produced a long-term and extensive impact on the Arctic Ocean. 展开更多
关键词 Bering Strait water mass Pacific water Arctic Ocean CHINARE2003
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The spatio-temporal variation of wintertime subtidal currents in the western Taiwan Strait 认领 引用 被引量：7
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作者 SHEN Junqiang QIU Yun +2 位作者 GUO Xiaogang PAN Aijun ZHOU Xiwu 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2017年第11期4-13,共10页
A new data set of observations by six cruises of ship-mounted acoustic doppler current profiler（SADCP） and three 40 d long bottom-mounted ADCPs（BADCPs） is employed to reveal the spatiotemporal variability of tidal... A new data set of observations by six cruises of ship-mounted acoustic doppler current profiler（SADCP） and three 40 d long bottom-mounted ADCPs（BADCPs） is employed to reveal the spatiotemporal variability of tidal and subtidal currents in the western Taiwan Strait（TWS） during winter season. The results confirm the existence of intense cotidal lines for M2 tidal current, which is located north of 25°N. In this case, no existence of an amphidromic point can be identified. It is also revealed that the counter-wind current（CWC） can extend through the whole western TWS and even occupy the entire water column during winter monsoon relaxation. However,this CWC is observed to be thoroughly overwhelmed by the downwind China coastal current（CCC） during the two big monsoon bloom events in the winter of 2007, and the CCC consequently extends southward throughout the western TWS instead. Most importantly, the variation of the spatial extent for the CWC and the CCC in the western TWS is found to be well explained by the first two modes of the vector empirical orthogonal function（VEOF） analysis, that is, it is mainly controlled by a wind-driven quasi barotropic current as the first mode and slightly modulated by a relatively weak background current with a first-order baroclinic structure as the second mode. 展开更多
关键词 counter-wind current China coastal current M2 tidal current Taiwan Strait winter season
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Recent satellite-derived sea ice volume flux through the Fram Strait: 2011–2015 认领 引用 被引量：6
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作者 BI Haibo WANG Yunhe +6 位作者 ZHANG Wenfeng ZHANG Zehua LIANG Yu ZHANG Yi HU Wenmin FU Min HUANG Haijun 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2018年第9期107-115,共9页
The Fram Strait（FS） is the primary region of sea ice export from the Arctic Ocean and thus plays an important role in regulating the amount of sea ice and fresh water entering the North Atlantic seas. A 5 a（2011–2... The Fram Strait（FS） is the primary region of sea ice export from the Arctic Ocean and thus plays an important role in regulating the amount of sea ice and fresh water entering the North Atlantic seas. A 5 a（2011–2015） sea ice thickness record retrieved from Cryo Sat-2 observations is used to derive a sea ice volume flux via the FS. Over this period, a mean winter accumulative volume flux（WAVF） based on sea ice drift data derived from passivemicrowave measurements, which are provided by the National Snow and Ice Data Center（NSIDC） and the Institut Francais de Recherche pour d＇Exploitation de la Mer（IFREMER）, amounts to 1 029 km^3（NSIDC） and1 463 km^3（IFREMER）, respectively. For this period, a mean monthly volume flux（area flux） difference between the estimates derived from the NSIDC and IFREMER drift data is –62 km^3 per month（–18×10~6 km^2 per month）.Analysis reveals that this negative bias is mainly attributable to faster IFREMER drift speeds in comparison with slower NSIDC drift data. NSIDC-based sea ice volume flux estimates are compared with the results from the University of Bremen（UB）, and the two products agree relatively well with a mean monthly bias of（5.7±45.9） km^3 per month for the period from January 2011 to August 2013. IFREMER-based volume flux is also in good agreement with previous results of the 1990 s. Compared with P1（1990/1991–1993/1994） and P2（2003/2004–2007/2008）, the WAVF estimates indicate a decline of more than 600 km^3 in P3（2011/2012–2014/2015）. Over the three periods, the variability and the decline in the sea ice volume flux are mainly attributable to sea ice motion changes, and second to sea ice thickness changes, and the least to sea ice concentration variations. 展开更多
关键词 sea ice volume flux Fram Strait Cryo Sat-2
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