Article
Environmental Sciences
Hongzhou Xu, Jian Shen, Dongxiao Wang, Lin Luo, Bo Hong
Summary: The Pearl River Estuary exhibits unique dynamics of subtidal estuarine circulation, with significant nonlinear advection effects observed, especially during spring tide. Overall, nonlinear advections play an important role in driving the circulation in the Pearl River Estuary, particularly during ebb tide.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Oceanography
Haiwei Li, Qingshu Yang, Sihao Mo, Jie Huang, Simin Wang, Rongyao Xie, Xiangxin Luo, Feng Liu
Summary: This study examined the formation mechanisms of estuarine turbidity maximum (ETM) and the role of mouth bars in the Modaomen Estuary of the Pearl River. Field measurements and numerical modeling were used to analyze the hydrodynamics, sediment concentration, and sediment size distribution in the mouth bar zone. The results showed that the existence of a mouth bar contributed to the occurrence of double residual circulations and enhanced bed shear stress, favoring the formation of ETM. The findings contribute to understanding the ETM formation in estuaries and provide guidelines for estuarine management and engineering.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Meteorology & Atmospheric Sciences
Mingliang Zhang, Tianping Xu, Hengzhi Jiang
Summary: The study focused on the Liao River estuary wetland in northeastern China, using a 3D hydrodynamic model to explore salinity variations under different scenarios. Results showed that river discharge and shoreline changes significantly affected the salinity distribution of the LRE.
Article
Multidisciplinary Sciences
Chong Sheng, Jiu Jimmy Jiao, Xin Luo, Jinchao Zuo, Lei Jia, Jinghe Cao
Summary: Large-river deltaic estuaries and adjacent continental shelves contain a previously unknown offshore freshened groundwater body, with potential as potable water or raw water source. This offshore low-salinity groundwater, likely a global phenomenon, has great potential in alleviating water shortages in highly urbanized coastal areas.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Marine
Bo Hong, Hanlu Xue, Liangsheng Zhu, Hongzhou Xu
Summary: Assessing the trend of sea surface wind is crucial for understanding the response of the marine environment to climate change. The study reveals a counterclockwise shift in summer wind direction in the Pearl River Estuary over the past 42 years. Using a high-resolution hydrodynamic model, it is found that this wind direction shift weakens both cross-channel wind-driven transport and along-channel seaward flow, leading to significant changes in circulation patterns and an increase in stratification.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Xing Wei, Shuqun Cai, Weikang Zhan
Summary: The development and human activities in the Pearl River Estuary (PRE) in recent decades have led to a decrease in tidal flat and water areas, advancing coastline, and declining water volume. Land reclamation is the main reason, while activities such as channel dredging, sand mining, and dam construction have also impacted the estuary's morphology.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
Muzhen Yang, Guoping Tang, Tao Jiang, Tao Chen, Xiaohua Chen
Summary: Seawater intrusion in the Modaomen channel of the Pearl River Estuary is influenced by river discharges, tides, and wind, showing distinct annual and half-monthly cycles. The frequency, severity, and periodicity of seawater intrusion decrease with increased landward distance away from the channel mouth.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Cui-Ci Sun, Wei-Zhong Yue, You-Shao Wang, Wei-Hong He, Yi-Guo Hong, Fu-Lin Sun, Hao Cheng, Mei-Lin Wu, Zhao-Yu Jiang, Fei Jiao, Yu-Tu Wang
Summary: This study investigated the distribution, sources, transports, and implications of Coomassie Blue stainable particles (CSP) for nitrogen biogeochemical cycles in the Pearl River estuary. The results showed that CSP concentrations were high in low-salinity waters and decreased from the river to the middle estuary. The primary source of CSP was found to be autochthonous phytoplankton production, and CSP-N contributed significantly to the particulate nitrogen pool in the estuary. These findings provide new insights into the role of CSP in nitrogen biogeochemical processes in turbid and productive estuarine systems.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Biodiversity Conservation
Fangzhou Chen, Xiu Pei Koh, Mandy Lok Yi Tang, Jianping Gan, Stanley C. K. Lau
Summary: This study used a microbial community-based index to assess the ecological status of the Pearl River estuary in China, showing poor overall status. The index values decreased from the upper estuary to offshore areas and were positively correlated with nutrients and fecal indicator bacteria, representing eutrophication and fecal pollution levels. Machine learning analysis identified several bio-indicators at the genus level to supplement the index and improve assessment accuracy.
ECOLOGICAL INDICATORS
(2021)
Article
Environmental Sciences
H. F. Tian, H. N. Ren, X. Y. Li, X. D. Zhang, X. Xu, S. G. Wang
Summary: This study systematically reviewed the regularities of marine disasters, water quality variations, water quality risk assessments, and wastewater treatment in the Pearl River Delta using comprehensive monitoring data. The study found that the total water resources in the region have been decreasing, seasonal marine disasters occur frequently causing loss of life and economic damage. A monitoring and early-warning system was constructed to provide scientific basis for responding to marine disasters.
JOURNAL OF ENVIRONMENTAL INFORMATICS
(2023)
Article
Environmental Sciences
Xiaoyu Jian, Shuwen Zhang, Qibin Lao, Fajin Chen, Peng Huang, Chunqing Chen, Qingmei Zhu
Summary: This study used stable water isotopes combined with temperature-salinity profiles to quantitatively understand the mixing of water masses in the Pearl River Estuary and the adjacent northern South China Sea. It identified three different water masses and found that their mixing processes varied across different water layers and regions.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Zhiyuan Han, Heng Wang, Hualiang Xie, Huaiyuan Li, Wendan Li
Summary: The morphological changes in Lingding Bay, influenced by fluvial and oceanic dynamics as well as human activities, have been examined using bathymetric data and remote sensing images. The study reveals that high-intensity sand-dredging activities have led to considerable deepening and increased water volume in the bay since 2007. These recent changes pose challenges for estuary regulation, disaster control, environmental protection, and operational safety of nearby ports and channels.
Article
Environmental Sciences
Weiyuan Kong, Liping Zhou, Georges Aumaitre, Didier Bourles, Karim Keddadouche
Summary: The distribution patterns of 10Be and 9Be concentrations in the Pearl River Estuary and its major outlets show significant variations. Despite high contamination levels of Cu and Cd, 9Be is hardly polluted by anthropogenic sources. The study suggests that the 10Be/9Be in the PRE area is mainly associated with natural processes rather than human activities.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Xufei Liu, Nan Wang, Xiaopu Lyu, Yangzong Zeren, Fei Jiang, Xinming Wang, Shichun Zou, Zhenhao Ling, Hai Guo
Summary: The photochemical O3 pollution over the Pearl River Estuary is mainly affected by VOC and NOx, with different O3 formation mechanisms in two patterns.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Peiyao Weng, Yu Tian, Hong Zhou, Ying Zheng, Yunzhong Jiang
Summary: This study proposes a real-time saltwater intrusion early warning framework based on timeseries clustering to improve the accuracy and lead time of predictions. By clustering previous observations, a comprehensive 24-h forecast of saltwater intrusion risk is obtained. The latest supervised clustering model, CAMELOT, outperforms traditional unsupervised clustering models and machine learning classifiers. The analysis reveals that the variation in saltwater intrusion length is strongly associated with tidal cycles and upstream discharge.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Geosciences, Multidisciplinary
X. Flores-Melo, R. Giesecke, I. R. Schloss, M. P. Latorre, X. Durrieu de Madron, F. Bourrin, M. L. Spinelli, C. Menniti, H. E. Gonzales, E. Menschel, J. Martin
Summary: This study presents an evaluation of the downward fluxes and composition of particulate matter in the Beagle Channel. The results show that the fluxes and composition of particulate matter differ between the western and eastern parts of the channel, with the former influenced by glacial and organic material, and the latter dominated by river inputs and phytoplankton blooms. This research contributes to understanding the impact of climate change on the biological carbon pump and land-sea connections in this high-latitude ecosystem.
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
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
Emma F. Young, Sally E. Thorpe, Angelika H. H. Renner, Eugene J. Murphy
Summary: Antarctic krill is a key species in the Southern Ocean and also the target of a commercial fishery. This study focuses on understanding the physical and behavioral drivers of krill movement and retention in the South Orkney Islands region through a regional modeling approach. The results suggest that oceanic transport and retention of krill are influenced by oceanographic variability and krill behavior.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Viviane David, Anne Mouget, Pierre Thiriet, Corentin Minart, Yannick Perrot, Loic Le Goff, Olivier Bianchimani, Solene Basthard-Bogain, Tristan Estaque, Justine Richaume, Jean-Francois Sys, Adrien Cheminee, Eric Feunteun, Anthony Acou, Patrice Brehmer
Summary: Scientists combined split-beam and multibeam echosounders to detect and classify different fish species, and found that acoustic data significantly improved the accuracy of species classification. These acoustic methods have important implications for marine management and decision-making.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Jia-Hui Xie, Xue-Lin Shao, Kai Ma, Li Gao
Summary: Chaetomorpha linum can store a large amount of phosphorus and utilize it for growth when phosphate is abundant, and it can produce alkaline phosphatase and release mobile phosphorus from sediments when phosphate is deficient. The sources of phosphorus supporting the blooms of C. linum vary seasonally in Swan Lagoon.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
A. A. Kubryakov, A. I. Mizyuk, S. V. Stanichny
Summary: This article investigates the evolution of the Sevastopol eddies using altimetry measurements and a high-resolution Nemo numerical model. The eddies can reside in the Black Sea for >3-6 months, impacting cross-shelf exchange and nutrient fluxes. The stationarity of the eddies is mainly due to the continental slope acting as a barrier, preventing cyclonic propagation.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Qingyuan Yang, Guoping Zhu
Summary: This study investigated the feeding habits of the spiny icefish in the Bransfield Strait and used biochemical tracers to demonstrate the variability in its diet, which is influenced by the availability of krill and the dynamic hydrography. The results highlight the potential of biochemical tracers in reflecting changes in prey's diet in a highly dynamic environment.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Andreana Cadaillon, Clara M. Iachetti, Ricardo Giesecke, Valeska Vasquez Lepio, Andrea Malits, Irene R. Schloss
Summary: A joint Chilean-Argentinian research cruise in the Beagle Channel revealed spatial and temporal heterogeneity of plankton abundance and composition. Plankton assemblages varied with bathymetry, water temperature, and nutrient availability. The easternmost sector of the channel had the highest total cell abundances and a diverse mix of small and large diatoms.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Barbara P. Paiva, Carlos A. F. Schettini, Eduardo Siegle
Summary: The Sao Francisco River is an important river in Brazil, crossing the semi-arid region. A series of dams have been built along the river for hydropower, changing the flow significantly. A hydrodynamic model was used to simulate the effects of flow changes on saline intrusion in the estuary. The simulations showed an increase in mixing and decrease in river contribution after the dams were built. The results can be used by management agencies to improve water quality for human consumption.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Xu Dong, Di Qi, Baohong Chen, Yingxu Wu, Xinqing Zheng, Hui Lin
Summary: Seasonal-scale local forcings reduce coastal pH and aragonite saturation state. The dynamics of carbonate system parameters were investigated in a coral habitat influenced by seasonal current patterns. Both Oaragonite and pH showed seasonal variations, controlled by dissolved inorganic carbon (DIC) and temperature. Ocean acidification scenarios projected a decrease in Oaragonite amplitude and an increase in hydrogen ion concentration ([H+]) amplitude.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Roman Cieslinski, Izabela Chlost, Michal Szydlowski
Summary: The Vistula Lagoon, one of the two lagoons on the Polish coast, is economically and environmentally significant. This study aims to calculate the water balance of the lagoon before and after the construction of a canal through the Vistula Spit. The construction of the new connection may impact the lagoon's water balance and its biotic and abiotic environment. Data on precipitation, evaporation, inflow from the catchment, and inflow/outflow through the Strait of Baltiysk were collected for mathematical modeling. The study suggests that the construction of the new canal will not significantly alter the lagoon's water balance but may cause environmental problems.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
F. P. Brandini, A. M. Silver, A. Gangopadhyay
Summary: We demonstrate that wind-driven Ekman transport enhances the advection and mixing of cells, leading to the transport of colder water from the Surface Antarctic Waters to the warmer waters of the northern Polar Front belt. This mechanism provides cells with a favorable temperature environment, allowing for specific species and community growth rates to develop blooms under non-light limiting macronutrients and iron conditions. Our findings have important implications for increased productivity in a future warming climate.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
John E. Garzon-Cardona, Ana M. Martinez, Boris P. Koch, Bernd Krock, Elbio D. Palma, Xianyu Kong, Ruben J. Lara
Summary: This study aimed to gain a better understanding of the role of dissolved organic matter (DOM) in the biogeochemistry of the Southern Patagonian shelf. The results showed that terrigenous input is the main source of ammonium and refractory carbon in the region, while the Antarctic Circumpolar Current contributes autochthonous DOM. Additionally, regeneration processes of nitrogen-rich water were found in the Tierra del Fuego Waters and Grande Bay regions.
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)