Acta Oceanologica Sinica最新文献_第8页

An improved algorithm based on equivalent sound velocity profile method at large incident angle 基于大入射角等效声速廓线法的改进算法

IF 1.4 3区地球科学

Acta Oceanologica Sinica Pub Date : 2024-04-15 DOI: 10.1007/s13131-023-2261-z

Qianqian Li, Qian Tong, Fanlin Yang, Qi Li, Zhihao Juan, Yu Luo

{"title":"An improved algorithm based on equivalent sound velocity profile method at large incident angle","authors":"Qianqian Li, Qian Tong, Fanlin Yang, Qi Li, Zhihao Juan, Yu Luo","doi":"10.1007/s13131-023-2261-z","DOIUrl":"https://doi.org/10.1007/s13131-023-2261-z","url":null,"abstract":"With the development of ultra-wide coverage technology, multibeam echo-sounder (MBES) system has put forward higher requirements for localization accuracy and computational efficiency of ray tracing method. The classical equivalent sound speed profile (ESSP) method replaces the measured sound velocity profile (SVP) with a simple constant gradient SVP, reducing the computational workload of beam positioning. However, in deep-sea environment, the depth measurement error of this method rapidly increases from the central beam to the edge beam. By analyzing the positioning error of the ESSP method at edge beam, it is discovered that the positioning error increases monotonically with the incident angle, and the relationship between them could be expressed by polynomial function. Therefore, an error correction algorithm based on polynomial fitting is obtained. The simulation experiment conducted on an inclined seafloor shows that the proposed algorithm exhibits comparable efficiency to the original ESSP method, while significantly improving bathymetry accuracy by nearly eight times in the edge beam.","PeriodicalId":6922,"journal":{"name":"Acta Oceanologica Sinica","volume":"77 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140579290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on the generation method of seawater sound velocity model based on Perlin noise 基于佩林噪声的海水声速模型生成方法研究

IF 1.4 3区地球科学

Acta Oceanologica Sinica Pub Date : 2024-04-15 DOI: 10.1007/s13131-023-2230-6

Zhimiao Chang, Fuxing Han, Zhangqing Sun, Zhenghui Gao, Xueqiu Wang

引用次数: 0

Parent-offspring relationship recognition based on SSR and mtDNA confirmed resource supplement effect of Fenneropenaeus chinensis release 基于SSR和mtDNA的亲子关系识别证实了释放五步蛇的资源补充效应

IF 1.4 3区地球科学

Acta Oceanologica Sinica Pub Date : 2024-04-15 DOI: 10.1007/s13131-023-2219-1

Song Sun, Ding Lyu, Xianshi Jin, Xiujuan Shan, Weiji Wang

{"title":"Parent-offspring relationship recognition based on SSR and mtDNA confirmed resource supplement effect of Fenneropenaeus chinensis release","authors":"Song Sun, Ding Lyu, Xianshi Jin, Xiujuan Shan, Weiji Wang","doi":"10.1007/s13131-023-2219-1","DOIUrl":"https://doi.org/10.1007/s13131-023-2219-1","url":null,"abstract":"The resource of Fenneropenaeus chinensis has declined sharply due to excessive fishing intensity, ecological changes and diseases. In order to supplement the fishing yield and restore resources of F. chinensis, the relevant authorities have carried out the activities of stock enhancement and releasing. It can increase biomass and recover resources. However, compared with increasing biomass, there were still few reports on its effect on the recovery of resources. Resource recovery is a process related to whether the released individuals can form a reproductive population. Up to now, there has been a lack of evidence whether the released F. chinensis can complete the entire life history, and form reproduction population. In this study, gravid female shrimp after spawning migration were captured from coastal waters of Haiyang, Qingdao, and Yellow Sea. After identifying parentage relationships using simple sequence repeat (SSR) and mtDNA haplotype, it was finally confirmed that there were eight released individuals in the recapture samples. It was confirmed for the first time that at least part of the released F. chinensis can complete overwintering and reproductive migration, and maintain the migration habits as their wild counterparts. Therefore, we infered that the released shrimp can reproduce under natural conditions, these F. chinensis can form reproductive populations theoretically if without human intervention. These results indicated that enhancenment and release activities have a positive effect on resource recovery.","PeriodicalId":6922,"journal":{"name":"Acta Oceanologica Sinica","volume":"4 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140578910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of particle composition and consolidation degree on the wave-induced liquefaction of soil beds 颗粒成分和固结度对波浪诱导土床液化的影响

IF 1.4 3区地球科学

Acta Oceanologica Sinica Pub Date : 2024-04-15 DOI: 10.1007/s13131-023-2223-5

Zhiyuan Chen, Yupeng Ren, Guohui Xu, Meng Li

{"title":"Effect of particle composition and consolidation degree on the wave-induced liquefaction of soil beds","authors":"Zhiyuan Chen, Yupeng Ren, Guohui Xu, Meng Li","doi":"10.1007/s13131-023-2223-5","DOIUrl":"https://doi.org/10.1007/s13131-023-2223-5","url":null,"abstract":"The wave-induced liquefaction of seabed is responsible for causing damage to marine structures. Particle composition and consolidation degree are the key factors affecting the pore water pressure response and liquefaction behavior of the seabed under wave action. The present study conducted wave flume experiments on silt and silty fine sand beds with varying particle compositions. Furthermore, a comprehensive analysis of the differences and underlying reasons for liquefaction behavior in two different types of soil was conducted from both macroscopic and microscopic perspectives. The experimental results indicate that the silt bed necessitates a lower wave load intensity to attain the liquefaction state in comparison to the silty fine sand bed. Additionally, the duration and development depth of liquefaction are greater in the silt bed. The dissimilarity in liquefaction behavior between the two types of soil can be attributed to the variation in their permeability and plastic deformation capacity. The permeability coefficient and compression modulus of silt are lower than those of silty fine sand. Consequently, silt is more prone to the accumulation of pore pressure and subsequent liquefaction under external loading. Prior research has demonstrated that silt beds with varying consolidation degrees exhibit distinct initial failure modes. Specifically, a dense bed undergoes shear failure, whereas a loose bed experiences initial liquefaction failure. This study utilized discrete element simulation to examine the microscopic mechanisms that underlie this phenomenon.","PeriodicalId":6922,"journal":{"name":"Acta Oceanologica Sinica","volume":"39 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140579331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulated Indonesian Throughflow in Makassar Strait across the SODA3 products 模拟印尼马卡萨海峡穿越 SODA3 产品的通流情况

IF 1.4 3区地球科学

Acta Oceanologica Sinica Pub Date : 2024-04-13 DOI: 10.1007/s13131-023-2186-6

Tengfei Xu, Zexun Wei, Haifeng Zhao, Sheng Guan, Shujiang Li, Guanlin Wang, Fei Teng, Yongchui Zhang, Jing Wang

{"title":"Simulated Indonesian Throughflow in Makassar Strait across the SODA3 products","authors":"Tengfei Xu, Zexun Wei, Haifeng Zhao, Sheng Guan, Shujiang Li, Guanlin Wang, Fei Teng, Yongchui Zhang, Jing Wang","doi":"10.1007/s13131-023-2186-6","DOIUrl":"https://doi.org/10.1007/s13131-023-2186-6","url":null,"abstract":"The Indonesian Throughflow (ITF), which connects the tropical Pacific and Indian oceans, plays important roles in the inter-ocean water exchange and regional or even global climate variability. The Makassar Strait is the main inflow passage of the ITF, carrying about 77% of the total ITF volume transport. In this study, we analyze the simulated ITF in the Makassar Strait in the Simple Ocean Data Assimilation version 3 (SODA3) datasets. A total of nine ensemble members of the SODA3 datasets, of which are driven by different surface forcings and bulk formulas, and with or without data assimilation, are used in this study. The annual mean water transports (i.e., volume, heat and freshwater) are related to the combination of surface forcing and bulk formula, as well as whether data assimilation is employed. The phases of the seasonal and interannual variability in water transports cross the Makassar Strait, are basically consistent with each other among the SODA3 ensemble members. The interannual variability in Makassar Strait volume and heat transports are significantly correlated with El Niño-Southern Oscillation (ENSO) at time lags of −6 to 7 months. There is no statistically significant correlation between the freshwater transport and the ENSO. The Makassar Strait water transports are not significantly correlated with the Indian Ocean Dipole (IOD), which may attribute to model deficiency in simulating the propagation of semiannual Kelvin waves from the Indian Ocean to the Makassar Strait.","PeriodicalId":6922,"journal":{"name":"Acta Oceanologica Sinica","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140578913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The variation in basal channels and basal melt rates of Pine Island Ice Shelf 松岛冰架基底通道和基底融化率的变化

IF 1.4 3区地球科学

Acta Oceanologica Sinica Pub Date : 2024-04-12 DOI: 10.1007/s13131-023-2271-x

Mingliang Liu, Zemin Wang, Baojun Zhang, Xiangyu Song, Jiachun An

{"title":"The variation in basal channels and basal melt rates of Pine Island Ice Shelf","authors":"Mingliang Liu, Zemin Wang, Baojun Zhang, Xiangyu Song, Jiachun An","doi":"10.1007/s13131-023-2271-x","DOIUrl":"https://doi.org/10.1007/s13131-023-2271-x","url":null,"abstract":"In recent years, there has been a significant acceleration in the thinning, calving and retreat of the Pine Island Ice Shelf (PIIS). The basal channels, results of enhanced basal melting, have the potential to significantly impact the stability of the PIIS. In this study, we used a variety of remote sensing data, including Landsat, REMA DEM, ICESat-1 and ICESat-2 satellite altimetry observations, and IceBridge airborne measurements, to study the spatiotemporal changes in the basal channels from 2003 to 2020 and basal melt rate from 2010 to 2017 of the PIIS under the Eulerian framework. We found that the basal channels are highly developed in the PIIS, with a total length exceeding 450 km. Most of the basal channels are ocean-sourced or groundingline-sourced basal channels, caused by the rapid melting under the ice shelf or near the groundingline. A raised seabed prevented warm water intrusion into the eastern branch of the PIIS, resulting in a lower basal melt rate in that area. In contrast, a deep-sea trough facilitates warm seawater into the mainstream and the western branch of the PIIS, resulting in a higher basal melt rate in the main-stream, and the surface elevation changes above the basal channels of the mainstream and western branch are more significant. The El Niño event in 2015–2016 possibly slowed down the basal melting of the PIIS by modulating wind field, surface sea temperature and depth seawater temperature. Ocean and atmospheric changes were driven by El Niño, which can further explain and confirm the changes in the basal melting of the PIIS.","PeriodicalId":6922,"journal":{"name":"Acta Oceanologica Sinica","volume":"98 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140578915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

What induced the trend shift of mixed-layer depths in the Antarctic Circumpolar Current region in the mid-1980s? 1980 年代中期南极环极洋流区域混合层深度趋势变化的诱因是什么？

IF 1.4 3区地球科学

Acta Oceanologica Sinica Pub Date : 2024-04-12 DOI: 10.1007/s13131-023-2268-5

Shan Liu, Jingzhi Su, Huijun Wang, Cuijuan Sui

引用次数: 0

Predictability of the upper ocean heat content in a Community Earth System Model ensemble prediction system 群落地球系统模式集合预测系统中上层海洋热含量的可预测性

IF 1.4 3区地球科学

Acta Oceanologica Sinica Pub Date : 2024-04-11 DOI: 10.1007/s13131-023-2239-x

Ting Liu, Wenxiu Zhong

{"title":"Predictability of the upper ocean heat content in a Community Earth System Model ensemble prediction system","authors":"Ting Liu, Wenxiu Zhong","doi":"10.1007/s13131-023-2239-x","DOIUrl":"https://doi.org/10.1007/s13131-023-2239-x","url":null,"abstract":"Upper ocean heat content (OHC) has been widely recognized as a crucial precursor to high-impact climate variability, especially for that being indispensable to the long-term memory of the ocean. Assessing the predictability of OHC using state-of-the-art climate models is invaluable for improving and advancing climate forecasts. Recently developed retrospective forecast experiments, based on a Community Earth System Model ensemble prediction system, offer a great opportunity to comprehensively explore OHC predictability. Our results indicate that the skill of actual OHC predictions varies across different oceans and diminishes as the lead time of prediction extends. The spatial distribution of the actual prediction skill closely resembles the corresponding persistence skill, indicating that the persistence of OHC serves as the primary predictive signal for its predictability. The decline in actual prediction skill is more pronounced in the Indian and Atlantic oceans than in the Pacific Ocean, particularly within tropical regions. Additionally, notable seasonal variations in the actual prediction skills across different oceans align well with the phase-locking features of OHC variability. The potential predictability of OHC generally surpasses the actual prediction skill at all lead times, highlighting significant room for improvement in current OHC predictions, especially for the North Indian Ocean and the Atlantic Ocean. Achieving such improvements necessitates a collaborative effort to enhance the quality of ocean observations, develop effective data assimilation methods, and reduce model bias.","PeriodicalId":6922,"journal":{"name":"Acta Oceanologica Sinica","volume":"51 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140578914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fuzzy cluster analysis of water mass in the western Taiwan Strait in spring 2019 2019 年春季台湾海峡西部水团的模糊聚类分析

IF 1.4 3区地球科学

Acta Oceanologica Sinica Pub Date : 2024-03-18 DOI: 10.1007/s13131-023-2286-3

Zhiyuan Hu, Jia Zhu, Longqi Yang, Zhenyu Sun, Xin Guo, Zhaozhang Chen, Linfeng Huang

{"title":"Fuzzy cluster analysis of water mass in the western Taiwan Strait in spring 2019","authors":"Zhiyuan Hu, Jia Zhu, Longqi Yang, Zhenyu Sun, Xin Guo, Zhaozhang Chen, Linfeng Huang","doi":"10.1007/s13131-023-2286-3","DOIUrl":"https://doi.org/10.1007/s13131-023-2286-3","url":null,"abstract":"The classification of the springtime water mass has an important influence on the hydrography, regional climate change and fishery in the Taiwan Strait. Based on 58 stations of CTD profiling data collected in the western and southwestern Taiwan Strait during the spring cruise of 2019, we analyze the spatial distributions of temperature (T) and salinity (S) in the investigation area. Then by using the fuzzy cluster method combined with the T-S similarity number, we classify the investigation area into 5 water masses: the Minzhe Coastal Water (MZCW), the Taiwan Strait Mixed Water (TSMW), the South China Sea Surface Water (SCSSW), the South China Sea Subsurface Water (SCSUW) and the Kuroshio Branch Water (KBW). The MZCW appears in the near surface layer along the western coast of Taiwan Strait, showing low-salinity (<32.0) tongues near the Minjiang River Estuary and the Xiamen Bay mouth. The TSMW covers most upper layer of the investigation area. The SCSSW is mainly distributed in the upper layer of the southwestern Taiwan Strait, beneath which is the SCSUW. The KBW is a high temperature (core value of 26.36°C) and high salinity (core value of 34.62) water mass located southeast of the Taiwan Bank and partially in the central Taiwan Strait.","PeriodicalId":6922,"journal":{"name":"Acta Oceanologica Sinica","volume":"41 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140152222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gravity anomalies determined from mean sea surface model data over the Gulf of Mexico 根据墨西哥湾平均海面模型数据确定的重力异常现象

IF 1.4 3区地球科学

Acta Oceanologica Sinica Pub Date : 2024-03-18 DOI: 10.1007/s13131-023-2178-6

Xuyang Wei, Xin Liu, Zhen Li, Xiaotao Chang, Hongxin Luo, Chengcheng Zhu, Jinyun Guo

{"title":"Gravity anomalies determined from mean sea surface model data over the Gulf of Mexico","authors":"Xuyang Wei, Xin Liu, Zhen Li, Xiaotao Chang, Hongxin Luo, Chengcheng Zhu, Jinyun Guo","doi":"10.1007/s13131-023-2178-6","DOIUrl":"https://doi.org/10.1007/s13131-023-2178-6","url":null,"abstract":"With the improvements in the density and quality of satellite altimetry data, a high-precision and high-resolution mean sea surface model containing abundant information regarding a marine gravity field can be calculated from long-time series multi-satellite altimeter data. Therefore, in this study, a method was proposed for determining marine gravity anomalies from a mean sea surface model. Taking the Gulf of Mexico (15°–32°N, 80°–100°W) as the study area and using a removal-recovery method, the residual gridded deflections of the vertical (DOVs) are calculated by combining the mean sea surface, mean dynamic topography, and XGM2019e_2159 geoid, and then using the inverse Vening-Meinesz method to determine the residual marine gravity anomalies from the residual gridded DOVs. Finally, residual gravity anomalies are added to the XGM2019e_2159 gravity anomalies to derive marine gravity anomaly models. In this study, the marine gravity anomalies were estimated with mean sea surface models CNES_CLS15MSS, DTU21MSS, and SDUST2020MSS and the mean dynamic topography models CNES_CLS18MDT and DTU22MDT. The accuracy of the marine gravity anomalies derived by the mean sea surface model was assessed based on ship-borne gravity data. The results show that the difference between the gravity anomalies derived by DTU21MSS and CNES_CLS18MDT and those of the ship-borne gravity data is optimal. With an increase in the distance from the coast, the difference between the gravity anomalies derived by mean sea surface models and ship-borne gravity data gradually decreases. The accuracy of the difference between the gravity anomalies derived by mean sea surface models and those from ship-borne gravity data are optimal at a depth of 3–4 km. The accuracy of the gravity anomalies derived by the mean sea surface model is high.","PeriodicalId":6922,"journal":{"name":"Acta Oceanologica Sinica","volume":"56 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140152341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0