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| 1 | Wave-dominated,mesotidal headland-bay beach morphodynamic classsfications of the Shuidong Bay in South China显示文摘Beach morphodynamic classifications have achieved extensive acceptance in foreign coastal geomorphological studies.Three beaches located in different zones of a headland-bay coast are classified according to a dimensionless fall parameter,a relative tide range parameter and a dimensionless embayment scaling parameter.Synchronous data,including wave,tide,sediment and beach morphology,are respectively collected from the tangential beach,the transitional beach and the shadow beach of the Shuidong Bay during each spring tide for 16 successive months.The research results indicate that(1) the beach in the tangential zone falls between two major categories which are low tide terrace beaches with rips and barred beaches;the beach in the transitional zone exhibits two main types which are low tide bar/rip beaches and barred dissipative beaches;and the beach in the shadow zone mainly mirrors dissipative states with presence or absence of bars;and(2) the sequential changes and differences of beach states in different coastal zones reflect spatial and temporal variabilities of the headlandbay coast,totally meeting the actual measured beach morphology changes,showing that studies on wavedominated,meso-macrotidal beaches need to consider the influences of the tides.Meanwhile,the research mainly provides a framework about beach state studies,due to different beach states with different erosion patterns,which requires the need to strengthen the researches in this respect,in order to further enrich theoretical basis for a beach topography evolution,beach morphodynamic processes and beach erosion prevention in China. | YU Jitao DING Yuanting CHENG Huangxin CAI Lailiang CHEN Zishen | 2016 | Acta Oceanologica Sinica2016，35，7： | 1 |
| 2 | Beach morphodynamic characteristics and classifications on the straight coastal sectors in the west Guangdong显示文摘Currently beach morphodynamic classification is the most important foundation to conduct associated coastal geomorphological studies.This paper carried out beach morphodynamic classifications for 12 straight beaches on headland-bay coasts based on field survey and evaluated the applicability of the most widely used dimensional fall velocity parameter(Ω)and relative tidal range parameter(RTR).One reflective,five intermediate and six non-barred dissipative beaches were visually classified and sand size seemed to be a key factor to differentiate these beaches.The studied beaches were in relatively low wave energy environments(Hs<1 m)and the absolute deep-water wave energy level of P0=3 KWm-1 was supposed to a critical threshold to characterize the applicability of theΩand RTR parameters.These two morphodynamic parameters were applicable for the beaches with P0>3 KWm-1 and MSR<2 m.It was found that the model of the traditional winter-and-summer profiles was not applicable in the study area in despite of distinct wave seasonality.The studied beaches were more possible to hover around a limited range due to relatively low background wave environments and variability without considering typhoon impacts,which needs further research on actual breaker wave conditions and beach morphodynamic type responses to typhoon events. | DING Yuanting YU Jitao CHENG Huangxin | 2020 | Journal of Geographical Sciences2020，30，7： | 0 |
| 3 | 三阴性乳腺癌基因组与转录组全景图:亚型及治疗策略显示文摘文章简介三阴性乳腺癌(triple-negative breast cancer,TNBC)是雌激素受体、孕激素受体和HER-2均为阴性的一群乳腺癌,缺乏有效靶向治疗,预后差,是乳腺癌学界的世界性难题。近年的研究表明TNBC是一个异质性很强的群体,为更全面而深入地认识这类疾病,寻找精准治疗的突破口,研究团队全面分析了465例原发性三阴性乳腺癌(TNBC)队列的临床、基因组学和转录组学数据。 | Yi-Zhou Jiang Ding Ma Chen Suo Jinxiu Shi Mengzhu Xue Xin Hu Yi Xiao Ke-Da Yu Yi-Rong Liu Ying Yu Yuanting Zheng Xiangnan Li Chenhui Zhang Pengchen Hu Jing Zhang Qi Hua Jiyang Zhang Wanwan Hou Luyao Ren Ding Bao Bingying Li Jingcheng Yang Ling Yao Wen-Jia Zuo Shen Zhao Yue Gong Yi-Xing Ren Ya-Xin Zhao Yun-Song Yang Zhenmin Niu Zhi-Gang Cao Daniel G.Stover Claire Verschraegen Virginia Kaklamani Anneleen Daemen John R.Benson Kazuaki Takabe Fan Bai Da-Qiang Li 王鹏 石乐明 黄薇 邵志敏 | 2020 | 科学新闻2020，，2： | 0 |
| 4 | Erosion hotspot identified along the sandy coast of Shanwei: characteristics and origin显示文摘Based on the measured beach profile data of Sanzhou Bay from 2015 to 2019,an erosion hotspot was identified along the Shanwei coastline of eastern Guangdong,where the maximum retreat distance of the shoreline exceeded 80 m and the erosion rate was more than 20 m/a.To determine the time at which the erosion hotspot started and the potential causes of its formation,this study used 63 Landsat satellite images from 1986 to 2019 to construct a time series of shoreline positions over the past 30 years by extracting their high-tide shorelines.Next,the M-K trend test method was introduced to evaluate the non-linear shoreline behavior based on the single-transect method.The results showed that the time of approximately 2013 marked the start of the erosion hotspot,the erosion hotspot was characterized by erosion rates of more than 2 m/a(a maximum rate of 31.6 m/a),and the affected shoreline more than 4.3 km from 2013 to 2019.Furthermore,this erosion hotspot was proved to be caused by artificial sand mining in the nearshore zone,which destroyed the original beach’s morphodynamic equilibrium.With the aid of storm events,soil cliffs composed of loose sediment on the backshore were sacrificed to achieve a new equilibrium,resulting in an extremely significant retreat parallel to the coast on the west side of the study area,which reflects the combined effect of human and natural processes.This study provides a concrete example of the rapid response of shorelines to artificial sand mining activities,and the associated finding is a stark warning about the cautious development and utilization of coastal zones and the strict regulation of human activities. | Jitao Yu Yuanting Ding Lin Zhang Pei Liu Renfu Fan | 2023 | Acta Oceanologica Sinica2023，42，7： | 0 |
| 5 | Effects of shore-normal coastal structure on medium-to long-term embayed shoreline evolution显示文摘Based on high-tide shoreline data extracted from 87 Landsat satellite images from 1986 to 2019 as well as using the linear regression rate and performing a Mann-Kendall(M–K)trend test,this study analyzes the linear characteristics and nonlinear behavior of the medium-to long-term shoreline evolution of Jinghai Bay,eastern Guangdong Province.In particular,shoreline rotation caused by a shore-normal coastal structure is emphasized.The results show that the overall shoreline evolution over the past 30 years is characterized by erosion on the southwest beach,with an average erosion rate of 3.1 m/a,and significant accretion on the northeast beach,with an average accretion rate of 5.6 m/a.Results of the M–K trend test indicate that significant shoreline changes occurred in early 2006,which can be attributed to shore-normal engineering.Prior to that engineering construction,the shorelines are slightly eroded,where the average erosion rate is 0.7 m/a.However,after shore-normal engineering is performed,the shoreline is characterized by significant erosion(3.2 m/a)on the southwest beach and significant accretion(8.5 m/a)on the northeast beach,thus indicating that the shore-normal engineering at the updrift headland contributes to clockwise shoreline rotation.Further analysis shows that the clockwise shoreline rotation is promoted not only by longshore sediment transport processes from southwest to northeast,but also by cross-shore sediment transport processes.These findings are crucial for beach erosion risk management,coastal disaster zoning,regional sediment budget assessments,and further observations and predictions of beach morphodynamics. | Jitao Yu Yuanting Ding Pei Liu Renfu Fan Lin Zhang | 2024 | Acta Oceanologica Sinica2024，43，2： | 0 |
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