Article
Geochemistry & Geophysics
Hamid Varikkodan, S. Balaji, S. Arjun
Summary: This study evaluated the surge heights and wave characteristics of a cyclone storm event in the Andaman Islands in November 2013. The results showed higher surges on the east coast and stronger waves on the right side of the cyclone.
DYNAMICS OF ATMOSPHERES AND OCEANS
(2024)
Article
Geosciences, Multidisciplinary
Olga Yu. Evseeva, Alexander G. Dvoretsky
Summary: This study investigated the species composition and spatial distribution of bryozoan diversity in the southern region of Franz Josef Land. A total of 151 bryozoan species were found, including 22 species recorded for the first time in this region. The diversity of bryozoans in this area is influenced by environmental factors such as depth, temperature, and the content of stones and shells.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Wenfeng Ruan, Cong Hu, Zhenghui Li, Yonggang Jia
Summary: Sea level and bottom water temperature variations caused by the Last Deglaciation climate warming have impacted the stability of marine hydrates. Simulations revealed that hydrate dissociation occurred in certain areas of the northern South China Sea, resulting in the release of methane into the seawater and atmosphere. The depth at which dissociation occurred ranged from 480 to 720 meters, covering approximately 6.68% of the northern South China Sea Area. Since the Last Deglaciation, an estimated amount of hydrates dissociated, releasing a significant amount of methane.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
A. M. Usman, D. J. J. Versfeld
Summary: In this study, the performance of the hidden Markov models (HMMs) for detecting and classifying whale vocalisations was improved. Feature extraction techniques based on principal component analysis (PCA) were proposed to extract relevant features. The experiments using PCA-HMMs and kPCA-HMMs on southern right whale and humpback whale vocalisation datasets showed that kPCA-HMMs outperformed PCA-HMMs. The proposed PC-HMMs not only outperformed existing FE-HMMs but also had lower computational complexity.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Oceanography
Jason A. Law, Robert H. Weisberg, Yonggang Liu, Dennis A. Mayer, Jeffrey C. Donovan
Summary: Time series data from a moored array of sensors are used to describe the long-term mean circulation and seasonal variations on the West Florida Continental Shelf. The observations reveal a coherent shelf-wide circulation pattern with alongshore and down-coast flow, and a coastal jet separating an upwelling region from a downwelling region influenced by the deeper ocean.
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
(2024)
Article
Geosciences, Multidisciplinary
Shigang Liu, Liyan Zhang, Rui Wang, Puqing Song, Xing Miao, Hai Li, Yuan Li, Longshan Lin
Summary: Skipjack tuna is one of the most commercially important marine fish species, and its stocks in the Indian Ocean are potentially significantly affected by climate oscillations. This study investigated the relationship between climatic indices and skipjack tuna catch per unit effort (CPUE), and established a predictive model to optimize the utilization of this species in the Indian Ocean.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Manoranjan Mishra, Tamoghna Acharyya, Bijay Halder, Celso Augusto Guimara Santos, Richarde Marques da Silva, Nihar Ranjan Rout, Debdeep Bhattacharyya
Summary: This study comprehensively analyzes the impacts of Tropical Cyclone Yaas on the mangrove forest in Bhitarkanika National Park, revealing significant ecosystem loss and changes in vegetation vigor and soil conditions, particularly an increase in salinity.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Runlong Sun, Peng Sun, Haiqing Yu, Peilong Ju, Shuyang Ma, Zhenlin Liang, Mikko Heino, Yunne-Jai Shin, Nicolas Barrier, Yongjun Tian
Summary: The Yellow Sea has experienced overfishing, leading to changes in the community structure. The development of a multi-species OSMOSE model allowed researchers to simulate different fishing scenarios and observe the impact of fishing pressure on the Yellow Sea ecosystem. Long-term fishing pressure resulted in a decline in biomass, body sizes, and longevity of modeled species. The study suggests that reducing fishing pressure can help restore the ecosystem and increase the proportion of elder and larger individuals.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Simone M. A. Lira, Ralf Schwamborn, Mauro de Melo Junior, Humberto L. Varona, Syumara Queiroz, Doris Veleda, Alef J. Silva, Sigrid Neumann-Leitao, Moacyr Araujo, Catarina R. Marcolin
Summary: In this study, CTD and ADCP data, as well as zooplankton samples from Fernando de Noronha Archipelago, were used to analyze the relationship between flow, island topography, chlorophyll-a fluorescence, and zooplankton abundance. The study found the presence of island and larval island effects downstream, and an upstream island effect upstream.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Xindong Pan, Zhenjiang Ye, Jia Wo, Qingwang Xing, Jian Yang, Yong Chen, Yongjun Tian
Summary: This study focuses on the otolith biogeochemical signatures of Japanese Spanish mackerel in the Yellow Sea. The results show that these signatures can be used as natural tags to understand the interannual variability in migration of marine fish species.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Denise Fabiana de Moraes Costa Schwamborn, Catarina R. Marcolin, Nathalia Lins-Silva, Alexandre Oliveira de Almeida, Ralf Schwamborn
Summary: The present study aimed to quantify the contributions of decapod crustaceans to the zooplankton in coastal tropical ecosystems and found that decapods were the second most important organisms, after copepods, in abundance, biomass, and biovolume. Crabs and shrimps were the most relevant decapod taxa in these ecosystems.
JOURNAL OF MARINE SYSTEMS
(2024)
Review
Meteorology & Atmospheric Sciences
Wei Zhang, Yu Sun, Yapeng Wu, Junyu Dong, Xiaojiang Song, Zhiyi Gao, Renbo Pang, Boyu Guoan
Summary: This study employed a spatiotemporal deep-learning method to correct biases in numerical ocean wave forecasts. By using a correction model driven by both wave and wind fields and a novel pixel-switch loss function, the corrected results performed well in different seasons and improved the accuracy of the original forecasts.
Article
Oceanography
Junita D. Karlsen, Ludvig Ahm Krag, Bent Herrmann
Summary: Fisheries management is transitioning from a single-species approach to an ecosystem-based approach to address the complexities of mixed-species fisheries. A dual compartment codend concept can provide a complex selectivity profile and allow for flexible adjustments at sea, improving compliance with management objectives.
OCEAN & COASTAL MANAGEMENT
(2024)
Article
Engineering, Marine
S. C. Mohapatra, Guedes Soares
Summary: An analytical model of moored floating flexible net cage systems was developed to study dynamics and wave loads. Results were compared with finite element analysis and experimental data, and various factors were analyzed for their effects on system performance. This study is important for the design of multiple floating fish cage systems in offshore aquaculture.
Review
Oceanography
X. Yang, Z. Y. Lin, W. J. Zhang, S. Xu, M. Y. Zhang, Z. D. Wu, B. Han
Summary: The study highlights the increasing importance of Arctic navigation safety and identifies gaps in the application of risk assessment methodologies. It calls for decision-oriented modelling techniques and bridging the gap between academic research and practical application.
OCEAN & COASTAL MANAGEMENT
(2024)
Article
Engineering, Marine
Xuyue Chen, Xu Du, Chengkai Weng, Jin Yang, Deli Gao, Dongyu Su, Gan Wang
Summary: This paper proposes a real-time drilling parameters optimization method for offshore large-scale cluster extended reach drilling based on intelligent optimization algorithm and machine learning. By establishing a ROP model with long short-term memory neurons, and combining genetic algorithm, differential evolution algorithm, and particle swarm algorithm, the method achieves real-time optimization of drilling parameters and significantly improves the ROP.
Article
Engineering, Marine
Jingxi Zhang, Junmin Mou, Linying Chen, Pengfei Chen, Mengxia Li
Summary: This paper proposes a cooperative control scheme for ship formation tracking based on Model Predictive Control. A predictive observer is designed to estimate the current motion states of the leader ship using delayed motion information. Comparative simulations demonstrate the effectiveness and robustness of the proposed controller.
Article
Oceanography
Caimao Tan, Tiantian Qin, Junliang He, Yu Wang, Hang Yu
Summary: This study addresses the storage space allocation problem of container yards based on the dual-cycle operation mode. A mixed integer programming model is established to optimize container transportation distance. The results show that dual-cycle operation can decrease transportation distance and the space allocation method based on it is more effective than traditional methods. The study also provides management insights for container ports and suggests effective solutions for bottleneck problems.
OCEAN & COASTAL MANAGEMENT
(2024)
Article
Oceanography
Yi-Zhuo Zhang, Cheng Xue, Na Wang, Gang Chen
Summary: This paper evaluates typical coastal provinces and cities in China, constructing an evaluation indicator system and clarifying the regional differences in the sustainable development capacity of China's marine fisheries industry. The results show that Shandong Province and Fujian Province have advantages in sustainable development, while Tianjin, Hebei Province, and Shanghai have room for improvement.
OCEAN & COASTAL MANAGEMENT
(2024)
Article
Oceanography
Manuel Vargas-Yanez, Ana Reeves-Bueno, Sara Fernandez-Topham, Francina Moya, Enrique Ballesteros, Cristina Alonso, Teresa Perez-Sanchez, Patricia Romero-Fernandez, Silvia Sanchez-Aguado, Ricardo Felix Sanchez-Leal, M. Carmen Garcia-Martinez
Summary: This study analyzed the phytoplankton communities in the upper 100 m of the Gulf of Cadiz and the Alboran Sea using time series data. The results show that these two regions can be considered as two differentiated bioregions, with the latter having higher productivity.
OCEAN & COASTAL MANAGEMENT
(2024)
