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Study on the interannual variability of the Kerama Gap transport and its relation to the Kuroshio/Ryukyu Current system
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作者 Han Zhou Kai Yu +3 位作者 Jianhuang Qin Xuhua Cheng Meixiang Chen Changming Dong 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2024年第3期1-14,共14页
An analysis of a 68-year monthly hindcast output from an eddy-resolving ocean general circulation model reveals the relationship between the interannual variability of the Kerama Gap transport(KGT)and the Kuroshio/Ryu... An analysis of a 68-year monthly hindcast output from an eddy-resolving ocean general circulation model reveals the relationship between the interannual variability of the Kerama Gap transport(KGT)and the Kuroshio/Ryukyu Current system.The study found a significant difference in the interannual variability of the upstream and downstream transports of the East China Sea-(ECS-)Kuroshio and the Ryukyu Current.The interannual variability of the KGT was found to be of paramount importance in causing the differences between the upstream and downstream ECS-Kuroshio.Additionally,it contributed approximately 37%to the variability of the Ryukyu Current.The interannual variability of the KGT was well described by a two-layer rotating hydraulic theory.It was dominated by its subsurface-intensified flow core,and the upper layer transport made a weaker negative contribution to the total KGT.The subsurface flow core was found to be mainly driven by the subsurface pressure head across the Kerama Gap,and the pressure head was further dominated by the subsurface density anomalies on the Pacific side.These density anomalies could be traced back to the eastern open ocean,and their propagation speed was estimated to be about 7.4 km/d,which is consistent with the speed of the local first-order baroclinic Rossby wave.When the negative(positive)density anomaly signal reached the southern region of the Kerama Gap,it triggered the increase(decrease)of the KGT towards the Pacific side and the formation of an anticyclonic(cyclonic)vortex by baroclinic adjustment.Meanwhile,there is an increase(decrease)in the upstream transport of the entire Kuroshio/Ryukyu Current system and an offshore flow that decreases(increases)the downstream Ryukyu Current. 展开更多
关键词 Kerama Gap KUROSHIO ryukyu Current OGCM for the Earth Simulator(OFES) hydraulic theory
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Seismicity and stress field in Okinawa Trough and Ryukyu regions
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作者 黄培华 苏维加 陈金波 《Acta Seismologica Sinica(English Edition)》 CSCD 1994年第4期513-520,共8页
According to the seismic data (mb≥5. 0) from 1977 to 1991 and the focal mechanisms of 68 earthquakes from 1961 to 1991, the characters of seismicity and stress field in Okinawa Trough and Ryukyu regions are discussed... According to the seismic data (mb≥5. 0) from 1977 to 1991 and the focal mechanisms of 68 earthquakes from 1961 to 1991, the characters of seismicity and stress field in Okinawa Trough and Ryukyu regions are discussed in this paper, and the paper suggests that: ① The Tokara Channel fault belt is a fault belt with seismicity, cutting through lithosphere. ② The different stress state in the both subducting slabs on the both sides of Tokara Channel fault belt are caused by the difference of subducting depth of the both slabs. ③ The seismicity and stress field in the Okinawa Trough and Ryukyu regions are related not only to the subduction of the Philippine Sea Plate but also to the self-expanding action of Okinawa Trough. 展开更多
关键词 SEISMICITY stress field Okinawa Trough ryukyu Island Arc ryukyu Trench
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Circulations east of Taiwan and in East China Sea and east of Ryukyu Islands during early summer 1985 被引量:8
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作者 Yuan Yaochu Cho-teng Liu +1 位作者 Pan Ziqin and Shi-pei Zhend 《Acta Oceanologica Sinica》 SCIE CAS CSCD 1996年第4期423-435,共13页
A modified inverse method is used to compute the circulations east of Taiwan and in the East China Sec and east of the Ryukyu Islands with hydrographic data obtained during early summer of 1985. The computational regi... A modified inverse method is used to compute the circulations east of Taiwan and in the East China Sec and east of the Ryukyu Islands with hydrographic data obtained during early summer of 1985. The computational region covers an area west of 129°E and from 21°45'N to 35°N. The computed results show that: (1 ) The net volume transport (VT ) of the Kuroshio through 21°45'N Section east of Ta Taiwan and west of 123°E is about 45 × 10 ̄6 m ̄3/sduring early summer of 1985. The Kuroshio has. two current cores. One is located near Taiwan, and its velocity isvery large and its maximum velocity is 226 cm/s at the 100 m level, which is close to the maximum velocity of the beginning of the Kuroshio east of the Philippines. The other is located further to the east, and its maximum velocity is159 cm/s at the 100m level; (2) through a transect northwest Of Miyakojima Island and a transect southwest of Okinawa laaed the volume transports of the Kuroshio in the East China Sea both are about 25 × 10 ̄6 m ̄3/s. The maximumvelocity of the Kuroshio at these two sections is 194 and 128 cm/s, respectively, and both are located on the shelfbreak; (3) beneath and east of the Kurohio there are the countercurrent (4) southeast of Okinawa Island there is anortheastward current, and its VT at Section HI is about 12. 6 × 10 ̄6 m ̄3/s, and it comes from a westward flow at 129° This project was supported by the National Natural Science Foundation of China under contract No. 49476278.(Second Institute of Oceanography, State Oceanic Administration, Hongzhou310012, China) (Institute of Oceanography, Taiwan University, Taipei, China)E Section and the recirculating gyre, and does not originate from the Kuroshio east of Taiwan during early summer of 1985. There is a southwestward abyssal current east of Okinawa Islands (5) there are several different scale eddies in this computational region. For example, there is a meso-scale strong cyclonic eddy east of Miyakojima Island. 展开更多
关键词 CIRCULATION area east of Taiwan East China Sea area east of the ryukyu Islands
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The study of the Kuroshio in the East China Sea and the currents east of the Ryukyu Islands 被引量:7
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作者 Yuan Yaochu, Endoh Masahiro and Ishizaki Hiroshi The Second Institute of Oceanography, State Oceanic Administration, Hangzhou, 310012, ChinaMeteorological Research Institute, JMA, Tsukuba 305, Japan 《Acta Oceanologica Sinica》 SCIE CAS CSCD 1991年第3期373-391,共19页
In this study, the inverse method is used to compute the Kuroshio in the East China Sea and southeast of Kyushu and the currents east of the Ryukyu Islands, on the basis of hydrographic data obtained during September-... In this study, the inverse method is used to compute the Kuroshio in the East China Sea and southeast of Kyushu and the currents east of the Ryukyu Islands, on the basis of hydrographic data obtained during September-October, 1987 by R/V Chofu Maru. The results show that: (1)A part of the Taiwan Warm Current has a tendency to converge to the shelf break; (2) the Kuroshio flows across the section C3 (PN) with a reduced current width, and the velocity of the Kuroshio at the section C3 increases and its maximum current speed is about 158 cm/s, and its volume transport here is about 26×106m3/s; (3) the Kuroshio has two current cores at the sections C3 (PN) and B2 (at the Tokara Strait); (4) the currents east of the Ryukyu Islands are found to flow northward over the Ryukyu Trench during September-October, 1987. The velocities of the currents are not strong throughout the depths. At the section C2 east of the Ryukyu Islands, the maximum current speed is at the 699 m levei and its magnitude is 25 cm/s, and its volume transport is about 21×06 m3/s; (5) the volume transports of the Kuroshio through the sections B2 (at the Tokara Strait) and C6 (southeast of Kyushu) are 23. 33, 67. 31×106 m3/s, respectively; (6) there are two meso-scale anticyclonic warm eddies between 135° E and the area east of the Ryukyu Islands, and their characters and hydrographic structure are discussed. 展开更多
关键词 In The study of the Kuroshio in the East China Sea and the currents east of the ryukyu Islands
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Origin and formation of the Ryukyu Current revealed by HYCOM reanalysis 被引量:1
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作者 Min Wang Zhaojun Liu +3 位作者 Xiaohua Zhu Xiaomei Yan Zhongzhe Zhang Ruixiang Zhao 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2019年第11期1-10,共10页
The origin of the Ryukyu Current(RC)and the formation of its subsurface velocity core were investigated using a 23-year(1993–2015)global Hybrid Coordinate Ocean Model(HYCOM)dataset.The volume transport of the RC come... The origin of the Ryukyu Current(RC)and the formation of its subsurface velocity core were investigated using a 23-year(1993–2015)global Hybrid Coordinate Ocean Model(HYCOM)dataset.The volume transport of the RC comes from the Kuroshio eastward branch(KEB)east of Taiwan and part of the North Pacific Subtropical Gyre(p-NPSG).From the surface to 2000m depth,the KEB(p-NPSG)transport contributes 41.5%(58.5%)to the mean total RC transport.The KEB originally forms the subsurface velocity core of the RC east of Taiwan due to blockage of the subsurface Kuroshio by the Ilan Ridge(sill depth:700 m).Above 700m,the Kuroshio can enter the East China Sea(ECS)over the Ilan Ridge,meanwhile,the blocked Kuroshio below 700m turns to the right and flows along the Ryukyu Islands.With the RC flowing northeastward,the p-NPSG contribution strengthens the subsurface maximum structure of the RC owing to the blockage of the Ryukyu Ridge.In the surface layer,the p-NPSG cannot form a stable northeastward current due to frequent disturbance by mesoscale eddies and water exchange through the gaps(with net volume transport into ECS)between the Ryukyu Islands. 展开更多
关键词 origins of ryukyu CURRENT SUBSURFACE velocity core volume transport KUROSHIO HYCOM
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Seismic detection of the X-discontinuity beneath the Ryukyu subduction zone from the SdP conversion phase 被引量:2
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作者 QingHui Cui WenLan Li +3 位作者 GuoHui Li MaiNing Ma XiaoYu Guan YuanZe Zhou 《Earth and Planetary Physics》 2018年第3期208-219,共12页
The X-discontinuity,which appears at the depth of approximately 300 km,is an important seismic interface with positive velocity contrasts in the upper mantle.Detecting its presence and topography can be useful to unde... The X-discontinuity,which appears at the depth of approximately 300 km,is an important seismic interface with positive velocity contrasts in the upper mantle.Detecting its presence and topography can be useful to understand phase transformations of relevant mantle minerals under the high-temperature and high-pressure circumstance of the Earth's interior.In this study,we detect the X-discontinuity beneath the Ryukyu subduction zone using five intermediate-depth events recorded by the dense Alaska Regional Network(AK).The X-discontinuity is successfully revealed from the robust slant stacking of the secondary down-going and converting Sd P phases.From the depth distribution of conversion points,we find that the X-discontinuity's depth ranges between 269 km and 313 km,with an average depth of 295 km.All the conversion points are located beneath the down-dipping side of the Philippine Sea slab.From energy comparisons in vespagrams for observed and synthetic seismograms,the strong converted energy is more likely from a thin high-velocity layer,and the S-wave velocity jumps across the X-discontinuity are up to 5% to 8% with an average of 6.0%.According to previous petrological and seismological studies,the X-discontinuity we detected can be interpreted as the phase transformation of coesite to stishovite in eclogitic materials within the oceanic crust. 展开更多
关键词 ryukyu subduction zone X-discontinuity coesite-stishovite transformation dense network SDP CONVERSION PHASE
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Validation and Application of Skeletochronology for Age Determination of the Ryukyu Ground Gecko, Goniurosaurus kuroiwae(Squamata: Eublepharidae) 被引量:1
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作者 Takaki KURITA Mamoru TODA 《Asian Herpetological Research》 SCIE 2013年第4期233-241,共9页
Skeletochronology is a method commonly used for estimating the age of amphibians and reptiles in the wild. However, the number of lines of arrested growth (LAGs) does not necessarily reflect age in some species. We ... Skeletochronology is a method commonly used for estimating the age of amphibians and reptiles in the wild. However, the number of lines of arrested growth (LAGs) does not necessarily reflect age in some species. We validated the applicability of this method to an endangered eublepharid gecko, Goniurosaurus kuroiwae, then inferred its longevity and age structures in wild populations. We classified young geckos into three groups using previously published data for early growth: Group 1 contained hatchlings before the first winter, Group 2 contained hatchlings after the first win- ter, and Group 3 included yearlings after the second winter. LAG numbers in these groups were then compared. All individuals in Group 1 possessed a single LAG, which was considered as a hatching line. Most individuals in Groups 2 and 3 possessed one and two additional LAGs, respectively (LAG1 and LAG2), corroborating the notion that LAGs are formed annually. A few geckos exhibited fewer LAGs than expected. Analysis of variations in LAG and marrow cavity diameter demonstrated that in animals with fewer LAGs, endosteal resorption or fusion of hatching line and LAG1 had occurred. LAG2 was never lost by endosteal resorption and was identifiable by its diameter. Thus, the age of adult geckos could be determined by counting LAGs outward from LAG2. Application of this method to wild populations re- vealed that the longevity of this species is not less than 83 months, but that almost all individuals in fragmented habitats die before 50 months, suggesting lower population sustainability in such habitats. 展开更多
关键词 age structure endosteal resorption hatching line LONGEVITY rapprochement ryukyu Archipelago
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Progress of studies in China from July 2010 to May 2015 on the influence of the Kuroshio on neighboring Chinese seas and the Ryukyu Current 被引量:2
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作者 YUAN Yaochu ZHU Xiaohua ZHOU Feng 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2015年第12期1-10,共10页
The influence of the Kuroshio on neighboring Chinese seas and the Ryukyu Current is a very important subject of interest in physical oceanography. To deeply explain the research progress made by Chinese scientists fro... The influence of the Kuroshio on neighboring Chinese seas and the Ryukyu Current is a very important subject of interest in physical oceanography. To deeply explain the research progress made by Chinese scientists from July2010 to May 2015, the following three aspects are reviewed in this paper. The first concerns the Kuroshio intrusion into the South China Sea(SCS) and its circulation around the Luzon Strait. There are two very important points to be explained: the seasonal and inter-annual variation of the Kuroshio intrusion and the mechanisms of the Kuroshio intrusion and the influence of the Kuroshio on currents in the Luzon Strait and circulation in the northern SCS. The second concerns the variability of the Kuroshio and its interaction with the East China Sea(ECS). There are following four interesting topics to be explained: an overview of studies on the Kuroshio in the ECS; the Kuroshio intrusion into the ECS, water exchange, and dynamic impacts; the downstream increase of nutrient transport by the Kuroshio; and the application of satellite remote sensing on terrestrial material transport by the Kuroshio intrusion into the ECS. Third, the interaction between the Ryukyu Current and Kuroshio in the ECS are also discussed. Finally, the main results are summarized and areas of further study are simply discussed. 展开更多
关键词 Kuroshio intrusion circulation South China Sea East China Sea currents in Luzon Strait ryukyu Current
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WAVENUMBER AND DEPTH PROPERTIES OF TEMPERATURE FINESTRUCTURE IN THE REGION AROUND THE RYUKYU ISLANDS
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作者 鲍献文 吴克俭 罗义勇 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 1999年第3期258-264,共7页
Forty two CTD profiles gathered in summertime of 1997 were used for finestructure studies around the Ryukyu Islands indicating that finestructure properties varied with depth; and that the wavenumber spectra density i... Forty two CTD profiles gathered in summertime of 1997 were used for finestructure studies around the Ryukyu Islands indicating that finestructure properties varied with depth; and that the wavenumber spectra density is a negative (-3~-4) power function of the wavenumber in the high wavenumber range. The identical finestructure spectral features in different stations indicate considerable water exchange through the Kerama Trench. The wavelet spectrum’s spatial structure and intermittency is related to the vertical mixing of water. 展开更多
关键词 FINESTRUCTURE spectrum WAVELET ryukyu ISLANDS
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Characteristic analysis on oxygen isotopic tracer in the East China Sea and waters to east of the Ryukyu-gunto
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作者 Hong Ashi and Yuan Yaochu (Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China)(Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China) 《Acta Oceanologica Sinica》 SCIE CAS CSCD 1995年第3期371-381,共11页
Samlpes of O isotopic tracer ware collected at Sections P_3, P_(25), P_(CM-1/2-E) and P_(CM-1/2-W) in both the EastChina Sea and the area to the east Of the Ryukyu-gunto during October-November, 1991.Analytical result... Samlpes of O isotopic tracer ware collected at Sections P_3, P_(25), P_(CM-1/2-E) and P_(CM-1/2-W) in both the EastChina Sea and the area to the east Of the Ryukyu-gunto during October-November, 1991.Analytical results of the δ ̄(18) O are as follows: (1) In the Kuroshio area, the δ ̄(18) o isolines are almost parallel to the200 m isobath. The value of δ ̄(18)O is nagative and reaches minimum on the main axis of the Kuroshio,and increases on both sides. (2) In the Taiwan Warm Current (TWC) area there is a high δ ̄(18) O tongue extending to the northeast. (3)In the area near the coast, the distribution of δ ̄(18)O isoline shows that the Changjiang River runoff diffuses seaward andthe land-ocean isotopic effect from the nearshore to the offshore. (4) The values of δ ̄(18) O are from-1. 0 x 10 ̄(-3) to -0.5 x 10 ̄(-3) in the shelf. (5) There is a low core of δ ̄(18) O value (< -1 .6 X 10 ̄(-3)) at the 600 m layer in the Kuroshioarea, which is quite in accord with the ekistence of a low salinity core (S 34. 30) between the 600 and 800 m layersin the same area. Finally, the correlations of the δ ̄(18)O with the salinity and temperature, the upwelling and so on arediscussed.(This study was supported by the National Natural Science Foundation of China under contract No. 4907257.)Yuan Yaochu et al. The Northwest Pacific circulation and its impacts on the current near the Chinese coast, 1991-1993. 展开更多
关键词 Oxygen isotopic tracer KUROSHIO shelf circulation ryukyu-gunto
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Study on the mesoscale eddies around the Ryukyu Islands
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作者 HAN Shuzong XU Changsan +4 位作者 WU Huiming WANG Gang PEI Junfeng FAN Yongbin WANG Xingchi 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2016年第3期38-45,共8页
Results of the Ocean General Circulation Model for the Earth Simulator(OFES) from January 1977 to December2006 are used to investigate mesoscale eddies near the Ryukyu Islands. The results show that:(1) Larger ed... Results of the Ocean General Circulation Model for the Earth Simulator(OFES) from January 1977 to December2006 are used to investigate mesoscale eddies near the Ryukyu Islands. The results show that:(1) Larger eddies are mainly east of Taiwan, above the Ryukyu Trench and south of the Shikoku Island. These three sea areas are all in the vicinity of the Ryukyu Current.(2) Eddies in the area of the Ryukyu Current are mainly anticyclonic, and conducive to that current. The transport of water east of the Ryukyu Islands is mainly toward the northeast.(3)The Ryukyu Current is significantly affected by the eddies. The lower the latitude, the greater these effects.However, the Kuroshio is relatively stable, and the effect of mesoscale eddies is not significant.(4) A warm eddy south of the Shikoku Island break away from the Kuroshio and move southwest, and is clearly affected by the Ryukyu Current and Kuroshio. Relationships between the mesoscale eddies, Kuroshio meanders, and Ryukyu Current are discussed. 展开更多
关键词 mesoscale eddy ryukyu ryukyu Current Kuroshio Ocean General Circulation Model for the Earth Simulator
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On the Live Coloration and Partial Mitochondrial DNA Sequences in the Topotypic Population of Goniurosaurus kuroiwae orientalis(Squamata: Eublepharidae), with Description of a New Subspecies from Tokashikijima Island, Ryukyu Archipelago, Japan
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作者 Masanao HONDA Hidetoshi OTA 《Asian Herpetological Research》 SCIE CSCD 2017年第2期96-107,共12页
Careful investigations of live coloration and other characters in the eublepharid gecko Goniurosaurus kuroiwae orientalis from Tonakijima Island, the type locality of the subspecies in the Central Ryukyus, Japan, reve... Careful investigations of live coloration and other characters in the eublepharid gecko Goniurosaurus kuroiwae orientalis from Tonakijima Island, the type locality of the subspecies in the Central Ryukyus, Japan, revealed its slight but consistent external differences from the consubspecific Tokashikijima population, whose phylogenetically divergent status against the former had been strongly suggested in a previous molecular study. A new subspecies, Goniurosaurus kuroiwae sengokui subsp. nov., is thus described for the Tokashikijima population. In life, Goniurosaurus k. sengokui subsp. nov. can be discriminated from G. k. orientalis in showing tint of reddish or pinkish, instead of yellowish, coloration in dorsal body pattern, and also usually darker and more or less reddish, instead of yellowish or grayish, iris in both adults and juveniles. Recalculation of sequence data at hand with relevant Gen Bank data confirmed substantial sequence divergences of G. k. sengokui from all other congeneric taxa of the Ryukyus described so far. 展开更多
关键词 Eublepharidae Goniurosaurus morphology taxonomy ryukyu Archipelago
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THE HYDROGRAPHIC FEATURES OF THE OCEAN REGION AROUND THE RYUKYU ISLANDS DURING SUMMER OF 1997 被引量:1
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作者 罗义勇 鲍献文 吴德星 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 1998年第4期317-325,共0页
Study of CTD data collected by the R/V DONG FANG HONG 2 in a 1997 summercruise in the ocean region around the Ryukyu Islands showed: 1) the existence, in the upper layer, of ahigh salinity water (HSW) core at about 20... Study of CTD data collected by the R/V DONG FANG HONG 2 in a 1997 summercruise in the ocean region around the Ryukyu Islands showed: 1) the existence, in the upper layer, of ahigh salinity water (HSW) core at about 200 dbar, and a low salinity water (LSW) core, centered atabout 700 dbar on the Pacific Ocean side of the Ryukyu Ridge, and located shallower on the East Chinafor (ECS) side; 2) the existence, in the upper layer, of warm water regions (WWR) west of Amami Is-land and Ishigaki Island, and a cold water region (CWR) east of Okinawa Ieland; in the lower layer, ofa CWR (WWR) southwest (southeast) of Okinawa Island; 3) the intrusion of North Pacific IntermediateWater into the ECS through the Kerama Trench located south of Okinawa Island and the strait east of Tai-wan Island. 展开更多
关键词 ryukyu ISLANDS hydrographic FEATURES HSW LSW WWR CWR
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Autumn intensification of the Ryukyu Current during 2003-2007 被引量:4
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作者 ZHU Xiao-Hua HUANG DaJi GUO XinYu 《Science China Earth Sciences》 SCIE EI CAS 2010年第4期603-609,共7页
Inverse calculations using data from 16 repeat hydrographic transects collected from April 2003 to June 2007 have yielded velocity structures and volume transports(VTs) of the Ryukyu Current in the region east of the ... Inverse calculations using data from 16 repeat hydrographic transects collected from April 2003 to June 2007 have yielded velocity structures and volume transports(VTs) of the Ryukyu Current in the region east of the northern Ryukyu Islands.The inverse calculation results show that the Ryukyu Current is dominated by a subsurface velocity core with maximum velocities from 15.1 to 80.0 cm/s,whose positions vary between 110 and 600 dbar and 27.2°-28.2°N along the transect.The mean velocity exhibits a subsurface velocity core with a maximum value of 24.6 cm/s at 326 dbar depth,a VT of 14.0 Sv(1 Sv≡106 m3/s),a vertical dimension of 800 m,and a horizontal dimension of 60 km.The seasonal mean velocities show that the Ryukyu Current is stronger in autumn than in other seasons.It is suggested that this seasonal variation is coincident with the intensification of the anticyclonic eddy south of Shikoku,Japan. 展开更多
关键词 ryukyu CURRENT inverse technique SUBSURFACE maximum velocity core volume TRANSPORTS SEASONAL variation
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Satsuma's Invasion of the Ryukyu Kingdom and Changes in the Geopolitical Structure of East Asia
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作者 Yuan Jiadong 《Social Sciences in China》 2013年第4期118-138,共21页
The late 16th and early 17th centuries witnessed a significant change in the geopolitical structure of East Asia. The power of the Ming dynasty was declining due to internal and external troubles and depleted finances... The late 16th and early 17th centuries witnessed a significant change in the geopolitical structure of East Asia. The power of the Ming dynasty was declining due to internal and external troubles and depleted finances, whereas Japan had been rising steadily since Toyotomi Hideyoshi unified the country. The traditional East Asian international order, centered on the Ming dynasty and based on the tributary system, faced a challenge from Japan. Against this background, the invasion of the Ryukyu Kingdom by the Japanese feudal domain of Satsuma had a great effect on the existing regional geopolitical structure. With the establishment of the "dual subordination" of the Ryukyu Kingdom, a new geopolitical structure gradually took shape in which the two great powers, China and Japan, competed for dominance. The Ming dynasty's limited awareness of maritime issues and of the geostrategic importance of the Ryukyu Islands, its passive attitude towards Satsuma's invasion, and especially, its tolerance of the Ryukyu Kingdom's "dual subordination" fed Japan's ambitions for further expahsion and encouraged its ultimate annexation of the kingdom by force. It can be said that the military conquest of the Ryukyu Kingdom by Satsuma foreshadowed the decline of the Ming and the rise of Japan. 展开更多
关键词 JAPAN Satsuma domain the ryukyus East Asia GEOPOLITICS
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The American Rejuvenation Policy of Ryukyu Traditional Culture and Its Transformation in the Early Period of Occupation
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作者 Sun Jiashen 《World History Studies》 2019年第1期36-56,共21页
Based on the observation of the Ryukyu ethnic group during the World WarⅡand the need for post-war military occupation,the United States formulated the rule of“pro-U.S.and separating from the Japan,strengthening the... Based on the observation of the Ryukyu ethnic group during the World WarⅡand the need for post-war military occupation,the United States formulated the rule of“pro-U.S.and separating from the Japan,strengthening the initiative of natives.”1 in the early days of the occupation of Ryukyu.In the field of culture,the United States has carried out activities such as the compilation of post-war textbooks,attempts to restore native language,protection of traditional art and historical sites,and they also revived the traditional culture of Ryukyu.Since then,due to the transformation of the U.S.Asia-Pacific strategy,the U.S.’s traditional culture policy for Ryukyu has gradually changed to allow Japanese culture to re-enter Ryukyu.The Ryukyu traditional cultural rejuvenation policy in the early postwar period led to the development and strengthening of the community awareness of the Ryukyu community,which had disappeared and been suppressed for a long time. 展开更多
关键词 ryukyu CULTURAL POLICY U.S.Asia-Pacific Strategy ryukyu Traditional Culture Community AWARENESS
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清代赴琉球册封使的选派
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作者 修斌 冯博 《中国海洋大学学报(社会科学版)》 2024年第4期40-51,共12页
明清鼎革之后,册封使在中琉封贡关系中继续扮演关键角色。清朝八次册封琉球,共计选派十六位册封使远渡重洋,出使琉球,为中琉关系发展作出了重要贡献。清朝十分重视册封使的遴选,主要体现在遴选主体、遴选程序、遴选标准及要求三方面,相... 明清鼎革之后,册封使在中琉封贡关系中继续扮演关键角色。清朝八次册封琉球,共计选派十六位册封使远渡重洋,出使琉球,为中琉关系发展作出了重要贡献。清朝十分重视册封使的遴选,主要体现在遴选主体、遴选程序、遴选标准及要求三方面,相较于明代均有较为明显的升格。在册封使派遣方面,对离京前、抵闽后、赴琉球、返国后的全过程,清朝也作了许多规制设计和精密筹划,确保册封使既能顺利完成使命,又能展示“天朝上国”仪度。清代赴琉球册封使选派的日臻完善是明琉封贡关系的延伸,也是清朝重视属国琉球的反映,进一步增强了琉球对中国的向心力,促进了琉球政治、经济、社会的发展,也使琉球更好地履行藩属国义务,满足了清朝对巩固封贡体系的希求。 展开更多
关键词 清代 琉球 册封使 选派
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明清封舟的航行动力风险及使团预防措施
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作者 汪祥胜 张忻昀 《重庆交通大学学报(社会科学版)》 2024年第4期44-53,共10页
明清时期,中琉交往频繁,册封琉球使团作为中方构设的官方渠道,数十次横渡东海、互通往来。中琉航路自然环境复杂,使团出行既有海氛未靖之险,更有惊涛骇浪、船破人危之虞。为应对封舟航行中自然动力带来的风险,使团采取提升封舟性能、改... 明清时期,中琉交往频繁,册封琉球使团作为中方构设的官方渠道,数十次横渡东海、互通往来。中琉航路自然环境复杂,使团出行既有海氛未靖之险,更有惊涛骇浪、船破人危之虞。为应对封舟航行中自然动力带来的风险,使团采取提升封舟性能、改进航海技术、遴选贤才能士、储备应急物资等措施预防。在保障航海安全的同时,这些预防措施也对琉球的造船航海技术、文化、农业产生积极影响,推进中琉两国宗藩关系的发展。 展开更多
关键词 封舟 航海技术 预防措施 中琉关系
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战后琉球处置及法理争议——基于《旧金山对日和约》领土处置及条约签字权交涉的考察
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作者 侯中军 《台湾历史研究》 2024年第3期32-44,共13页
《开罗宣言》是盟国签订战后对日和约的基础性文件,该宣言的3个条款是一个涵盖了时间和空间两个维度的国际文件,逐层递进,互为补充,意在剥夺日本所有侵夺的领土。基于《开罗宣言》等国际法文件,战后琉球的处置,需要由包括中苏在内的反... 《开罗宣言》是盟国签订战后对日和约的基础性文件,该宣言的3个条款是一个涵盖了时间和空间两个维度的国际文件,逐层递进,互为补充,意在剥夺日本所有侵夺的领土。基于《开罗宣言》等国际法文件,战后琉球的处置,需要由包括中苏在内的反法西斯盟国共同决定,目前的处置结果存在严重的法理争议。英国内部一度坚持琉球必须从日本领土剥离出去,至于美国所坚持的战略托管,必须经由联合国安理会授权。国民党当局并未默认《旧金山对日和约》的琉球处置条款,而是认为旧金山和约只是一项政治性条约,属于盟国结束对日战争状态的协议,而琉球的处置需要专门的领土条约予以规定。围绕国民党当局《旧金山对日和约》签字权问题的美英交涉,与战后日本领土处置条款的交涉纠缠在一起,影响到了国民党当局对于琉球群岛的处置决策。 展开更多
关键词 琉球处置 法理争议 对日和约
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浅析宗藩体制下清政府对琉球态度的转变——以“脱清人”的活动为中心
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作者 王群 姜秀玉 《西部学刊》 2024年第7期71-74,共4页
在近代风云变化的东亚地区,随着西方列强的侵入,清朝与琉球的宗藩关系受到了巨大冲击。自明治维新以来,日本侵略的步伐加快,使琉球深陷危机之中。以向德宏、蔡大鼎为代表的“脱清人”在福州、天津和北京等地开展活动以求清政府的援助。... 在近代风云变化的东亚地区,随着西方列强的侵入,清朝与琉球的宗藩关系受到了巨大冲击。自明治维新以来,日本侵略的步伐加快,使琉球深陷危机之中。以向德宏、蔡大鼎为代表的“脱清人”在福州、天津和北京等地开展活动以求清政府的援助。清朝作为琉球的宗主国,却对琉球显示出摇摆不定的态度。在“脱清人”的不断努力下,以“分岛改约”事件为节点,清政府对待琉球的态度出现了由轻视到重视的巨大转变,并以强硬的态度与日本谈判。直到甲午战争爆发,华夷秩序完全崩溃,这种以“宗藩体制”为主体的中琉关系最终瓦解。 展开更多
关键词 宗藩体制 琉球 “脱清人” 清政府 日本
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