Regional Studies in Marine Science最新文献

{"title":"Predicting storm surge extremes on the Southeast Brazilian Coast: Long-term projections with neural networks","authors":"Clarisse Lacerda Gomes Kaufmann ,&nbsp;Marcos Nicólas Gallo ,&nbsp;Ricardo De Camargo","doi":"10.1016/j.rsma.2024.103846","DOIUrl":"10.1016/j.rsma.2024.103846","url":null,"abstract":"<div><div>Extreme sea level events, resulting from the confluence of tides and storm surges, pose a significant threat to coastal populations and economies. The escalating risks associated with these events are exacerbated by climate change, manifesting in heightened storm intensity, increased frequency, and rising sea levels. Precise estimation of the probability of extreme storm surges is crucial for effective coastal management and adaptation. However, utilizing historical storm data is challenging due to data scarcity and the imperative to consider potential non-stationarity induced by climate change in predicting such events. This study addresses these challenges by introducing two neural network-based machine learning systems: a Multilayer Perceptron (MLP) and a Long Short-Term Memory (LSTM). Leveraging local and remote atmospheric and oceanic conditions, these systems project storm surges until 2060, incorporating climate projections. Trained and evaluated using sea level data from Imbetiba Port in Macaé, Rio de Janeiro, Brazil, the models utilize dynamic regionalization data from the RegCM4 and WW3 models, forced by HadGEM2-ES and MPI climate models. Both neural network models exhibited similar performance patterns, demonstrating high agreement in predicting storm surge heights with a 100-year return value, based on Imbetiba Port data. Projections utilized peaks-over-threshold (POT) methods, and extremes were calculated using a generalized Pareto distribution (GPD). Long-term projections indicated a 28 % increase (MLP ANN) and a substantial 70 % increase (LSTM RNN) in estimating extreme values, surpassing the observed storm surge of 0.67 m. Projected mean values were 0.86 m for the MLP network and 1.15 m for the LSTM network, providing valuable insights into the potential amplification of extreme sea level events in the studied region.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatio-temporal distribution and source analysis of nutrients and antibiotics in the waters of a mariculture area in Haizhou Bay, Yellow Sea","authors":"Liyuan Wang ,&nbsp;Wei Jin ,&nbsp;Siqi Xie ,&nbsp;Shuo Wang ,&nbsp;Ruilin Zhang ,&nbsp;Dong Xue ,&nbsp;Yangjun Chen ,&nbsp;Xinran He ,&nbsp;Zhihua Feng","doi":"10.1016/j.rsma.2024.103837","DOIUrl":"10.1016/j.rsma.2024.103837","url":null,"abstract":"<div><div>Due to the continuous expansion of China's urban areas, there has been a growing trend of discharging marine aquaculture tail water directly into the sea. This phenomenon has had a significant impact on the marine ecological environment.To determine the status of pollutant discharge from marine aquaculture tailwater and facilitate its treatment.This paper analyses the spatiotemporal distribution characteristics of nutrients and antibiotics in the pond culture mode of Penaeus monodon. The influent, tail water, and adjacent seawater of the aquaculture concentration area in the port industrial zone of Guanyun County, Lianyungang City were monitored. The study aims to explore potential correlations between the variables.The data indicates that nitrogen and phosphorus are the primary pollutants in the Lianyungang aquaculture sea area. In 2022, the average total nitrogen content was 104.475 mg/L, and the average total phosphorus content was 3.83 mg/L.Sulfanilamide and norethindrone antibiotics were found in the culture tailings. The residual content of sulfonamide antibiotics ranged from 0.6 to 33.4 ng/L, while the residual content of norethindrone antibiotics ranged from 0.15 to 1.0 ng/L.This paper analyses the monitoring data statistically to provide basic support for the protection of the marine ecological environment in Haizhou Bay. Additionally, to enhance the environmental management of China's coastal waters, it is necessary to formulate an environmental management policy for coastal waters and provide a scientific basis for the implementation of the total amount of pollutants discharged into the sea.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seasonal fluctuations in fatty acid profile and biochemical traits of edible deep-water shrimp Heterocarpus woodmasoni","authors":"A.P. Gayathri ,&nbsp;Rekha Devi Chakraborty ,&nbsp;Kajal Chakraborty ,&nbsp;Shubhajit Dhara ,&nbsp;Gyanranjan Dash","doi":"10.1016/j.rsma.2024.103817","DOIUrl":"10.1016/j.rsma.2024.103817","url":null,"abstract":"<div><div><em>Heterocarpus woodmasoni</em> is an edible deep-sea caridean shrimp that holds significant commercial importance and is sourced from the south-west coast of India in the Arabian Sea. In this research study, we extensively examined the biochemical, mineral and seasonal fatty acid compositions of <em>H. woodmasoni</em>. ANOVA tests, unveiled noteworthy disparities (p &lt; 0.05) in moisture, crude fat and protein content between male and female <em>H. woodmasoni</em>. In contrast, we observed no significant differences in ash, carbohydrate, and cholesterol levels. Regarding minerals, the prominent macro elements detected in <em>H. woodmasoni</em> included K, P, Na, Ca and Mg with Zinc (Zn) and manganese (Mn) emerging as the dominant micro elements followed by Copper (Cu) and Selenium (Se). Notably, these shrimp exhibited a well-balanced ratio of essential to non-essential amino acids. Within the n-6 series, linoleic acid (18:2n-6), dihomo-γ-linolenic acid (20:3n-6), and arachidonic acid (20:4n-6) were identified as the primary polyunsaturated fatty acids (PUFA), exhibiting distinct concentrations across sexes and seasons. Both male and female <em>H. woodmasoni</em> displayed lower atherogenicity and thrombogenicity indices, ranging between 0.4 and 0.6 and 0.2–0.4, respectively, indicating a favourable cardiovascular health profile. Principal component analysis resulted in a two-principal component model explaining 83.4 % and 67.3 % of the total data variance for amino acid and fatty acid indices, respectively. This comprehensive biochemical analysis of both male and female <em>H. woodmasoni</em> reaffirms the species' status as a valuable and healthful resource, characterized by its abundance of high-quality nutritional components.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Macrobenthos community responses to tidal barrier in a sub-tropical river estuary: Insights for coastal management","authors":"Md. Riadul Jannah ,&nbsp;Debasish Saha ,&nbsp;Md. Maheen Mahmud Bappy ,&nbsp;As-Ad Ujjaman Nur ,&nbsp;Partho Banik ,&nbsp;Mohammed Fahad Albeshr ,&nbsp;Takaomi Arai ,&nbsp;M. Belal Hossain","doi":"10.1016/j.rsma.2024.103842","DOIUrl":"10.1016/j.rsma.2024.103842","url":null,"abstract":"<div><div>Understanding the impacts of tidal barriers on macrobenthos is essential for comprehending anthropogenic influences on coastal ecosystems and biodiversity. This study aimed to address two primary questions: firstly, whether there are differences in macrobenthos abundance and diversity between the protected (CPA) and non-protected areas (CNPA) characterized by the tidal barrier, and secondly, whether the environmental factors associated with tidal barriers influence the macrobenthos community structure. Samples collected from CPA and CNPA sites from a subtropical river-estuary revealed the presence of 16 taxa of soft-bottom invertebrates, with a predominant presence of Ampeliscidae, Capitellidae, Glyceridae, Oligochaeta, Mysidae, Mytilidae, Naticidae, Portunidae, and Insecta. Significant differences (p &lt; 0.05) in salinity and conductivity were observed between CPA and CNPA. In the CPA area, the average temperature was 23.21°C, dissolved oxygen was 4.81 mg/L, and pH was 7.91, all of which were higher compared to CNPA.Macrobenthos abundance was higher in CNPA (1506 ± 688 ind.m⁻²) compared to CPA (1330 ± 611 ind.m⁻²) (p &lt; 0.05) with distinct dominance patterns of Polychaeta and Malacostraca. CNPA showed lower species dominance index (0.10–0.24), higher species diversity index (1.52–2.38), slightly higher Margalef`s index (from 0.63 to 1.6), and lower Shannon Index (from 0.69 to 0.85) indicating a more balanced community structure with a more diverse assemblage of species than CPA and a moderately polluted area. Hierarchical cluster analysis (HCA), Non-metric multidimensional scaling (nMDS) analysis, and Canonical Correspondence Analysis (CCA) indicated that the tidal barrier negatively impacted the macrobenthic families. The findings indicated the influencing effect of the breakwater defensive system on the macrobenthos assemblage at the estuary and informed policymakers and environmental scientists to develop environment-friendly breakwater defense systems.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Overall evaluation of microplastic exposure in oysters (Crassostrea gigas) in coastal areas of Viet Nam","authors":"Xuan Thanh Thao Le ,&nbsp;Viet M. Trinh ,&nbsp;Duy Thanh Nguyen ,&nbsp;Manh Van Do","doi":"10.1016/j.rsma.2024.103840","DOIUrl":"10.1016/j.rsma.2024.103840","url":null,"abstract":"<div><div>This study aimed to evaluate the presence of microplastics (MPs) in oysters (<em>Crassostrea gigas</em>) across the coastal area of Vietnam. Oyster samples were collected from sixteen coastal provinces across Vietnam, from North to South. Visual and chemical verification of microplastics were performed by the micro Fourier transform infrared (μFTIR) method using the Nicolet iN10 MX Infrared Imaging Microscope. The average concentration of MPs was 1.18 ± 0.59 MPs/g of wet weight or 11.55 ± 4.83 MPs/individual. Fragments were the dominant shape of MPs, followed by fibers and beads, corresponding to 62.40 %, 37.10 %, and 0.50 %, respectively. The detected MPs varied in size from 20 to 998 µm with an average size of 112 ± 125 µm. The majority of MPs size was smaller than 100 µm, accounting for 65.39 %. A total of twelve polymers were detected, of which Polyethylene terephthalate (PET) and high-density polyethylene (HDPE) were the two dominant types, accounting for 42.26 % and 31.95 %, respectively. This study provides valuable insights into the presence and potential risks posed by MPs from the oyster (<em>C.gigas</em>) in coastal areas of Vietnam.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical investigations on seasonal variation of waves in the Cat Ba – Ha Long coastal area (Vietnam) in 2021","authors":"Minh Hai Nguyen ,&nbsp;Duy Vinh Vu ,&nbsp;Duc Thinh Nguyen ,&nbsp;Thanh Duong Nguyen","doi":"10.1016/j.rsma.2024.103828","DOIUrl":"10.1016/j.rsma.2024.103828","url":null,"abstract":"<div><div>The Delft3D model, equipped with a high-resolution grid, was employed to simulate wave conditions in the Cat Ba-Ha Long coastal area by combining hydrodynamic and wave modules. The model was calibrated and validated using the measurement data at Hon Dau station, and demonstrated a good match between the data and simulation results (NSE = 0.55–0.69). In 2021, the simulation results revealed that wind waves are the primary type of waves in the Cat Ba-Ha Long coastal area. The lowest monthly-averaged wave heights were found in the January-February period (about 0.4 m), followed by a gradual increase, reaching its peak in the May-June period (1.18 m), and subsequent fluctuations throughout the rest. Wave heights ranging from 0.2 to 0.6 m were frequently observed in the majority of months, including January, February, March, April, July, November, and December. The wave heights ranging 0.6–0.8 m are primarily recorded during the months of August and October. The occurrence of high-altitude waves of 1.0–2.0 m in height was predominantly seen during the months of May and June. The areas with elevated wave heights (&gt;1 m) are primarily located in the southern part of Cat Ba and the southeast of Ha Long, accounting for around 30 % of the region. The areas characterized by gentle undulations are primarily concentrated in Ha Long Bay, where wave heights range from 0.2 to 0.6 m, accounting for 70 % of the region. The variations in wave height primarily result from the southern region of Cat Ba and the southeastern area of Ha Long Bay, which are more exposed and less influenced by the topography, hence facilitating the development of wind waves. Simultaneously, the Ha Long area is encircled by small islands, characterized by shallow depths, with waves that are diffused in direction and exhibit modest heights. In this area, the dominant wave directions are south-southeast (32.9 %) and east (29.7 %).</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrating machine learning algorithms and fuzzy AHP for assessing livelihood vulnerability in Southwestern Coastal Bangladesh","authors":"Anjum Tasnuva ,&nbsp;Quazi Hamidul Bari","doi":"10.1016/j.rsma.2024.103825","DOIUrl":"10.1016/j.rsma.2024.103825","url":null,"abstract":"<div><div>The people living in the coastal regions of Bangladesh rely significantly on nature for their livelihoods, which renders them sensitive to climate change. The aim of this study is to determine the key indicators which contribute more to livelihood vulnerability of disaster-prone Gabura union in southwestern coastal Bangladesh. To achieve this goal, three machine learning algorithms are employed for determining the key indicators of livelihood vulnerability. Subsequently, a livelihood vulnerability index (LVI) is constructed using these key indicators with the weighting of indicators facilitated by Fuzzy AHP method. And finally, a livelihood vulnerability map (LVM) is generated to visualize the spatial distribution and analysis of livelihood vulnerability within the union. The study employs a mixed-methods approach, including questionnaire surveys, focus group discussions, key informant interviews, and remote sensing image analysis. A household survey of 950 households tracked livelihood vulnerability using 25 indicators across three domains of vulnerability, e.g., exposure, sensitivity, and adaptive capacity. ArcGIS and Google Earth Engine facilitated spatial data analysis. The Gabura Union exposed high vulnerability (LVI 0.63), driven by elevated exposure (0.61) and sensitivity (0.59) and lower adaptive capacity (0.30). The Livelihood Vulnerability Map (LVM) illustrates vulnerability across wards of the union, emphasizing high vulnerability zones on the periphery of the union, along the Kopothakho and Kholpetua rivers while central part of the union shows a moderate vulnerability level. The study's novelty lies in effectively integrating multiple methods for livelihood vulnerability assessment. Policymakers should target interventions focusing on areas along the Kopothakho River, to enhance community resilience.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"How morphodynamic gradients shape the distribution of meiofauna and nematodes on sandy beaches of the Amazon region?","authors":"Tatianne Pereira Gomes de Melo ,&nbsp;Daiane Aviz ,&nbsp;Débora Cristina Melo da Silva ,&nbsp;Sara Elaine Lopes da Silva ,&nbsp;Thaís Angélica da Costa Borba ,&nbsp;Marcelo Rollnic ,&nbsp;Virág Venekey","doi":"10.1016/j.rsma.2024.103844","DOIUrl":"10.1016/j.rsma.2024.103844","url":null,"abstract":"<div><div>The present study analyzed how a small-scale morphodynamic gradient, based on the level of exposure to oceanic waves, shapes the spatial distribution patterns of the local meiofauna, with a special focus on the nematodes, of tropical macrotidal beaches on the Amazon coast (northern Brazil). The study focused on three sandy beaches, first compiling their physical characteristics (waves, currents and morphodynamic state), and then sampling biological and sediment samples at five different levels across the intertidal zone. Meiofauna was composed of 11 different groups, but was dominated by Nematoda. The nematode assemblage had a total of 89 genera, of which <em>Daptonema</em> and <em>Theristus</em> (both from family Xyalidae) were the most abundant on all studied beaches, at most intertidal levels. The diversity of nematode genera increased toward the low tide mark, while nematode density peaked in either the upper (on the protected and tide-dominated beaches) or intermediate levels (on the exposed, tide-modified beach). Distinct faunal zonation patterns were identified on the three beaches, which were influenced by their level of exposure to oceanic conditions, their granulometry, and the moisture of the sediment. While the variation in the characteristics of the meiofauna can be attributed to the level of exposure of beaches, horizontal distribution patterns were also closely related to habitat heterogeneity, including morphological features and freshwater inputs.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analyses of sea turtle landing behavior based on frequently observed coastal profile data - A case study in Enshu Coast, Japan","authors":"Arief Darmawan ,&nbsp;Satoshi Takewaka ,&nbsp;Tanaka Yuji","doi":"10.1016/j.rsma.2024.103839","DOIUrl":"10.1016/j.rsma.2024.103839","url":null,"abstract":"<div><div>This study analyses sea turtle landing behavior along a 10 km sandy beach on the Enshu Coast, Japan, facing the Pacific Ocean. Data for the analysis are sea turtles' landing positions and crawl tracks recorded by a handheld GNSS device from May to September (2011–2016), noting spawning or no-spawning activity simultaneously, supplemented by weekly cross-shore beach profiles surveyed at four locations, satellite images, and other geographical data. At the onset, landing positions on the beach are visualized to determine local concentrations along the beach. Subsequently, we estimate the distance of spawning and no-spawning positions from the waterline during landing and evaluate beach stability through the temporal elevation change standard deviation. The study found that preferred spawning locations are 40–70 m from the waterline, above the intertidal zone, on bare sand, with a standard deviation of 0.1–0.6 m. This study also highlights the impact of beach infrastructure on sea turtle spawning failures and the influence of significant wave height on sea turtle landing.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of the accuracy of Sentinel-3 OLCI L2 products retrieved by standard and regional algorithms for ecological monitoring of the Black Sea coastal and shelf waters","authors":"Tanya Churilova ,&nbsp;Elena Skorokhod ,&nbsp;Vyacheslav Suslin ,&nbsp;Nataliia Moiseeva ,&nbsp;Tatiana Efimova ,&nbsp;Anatoly Buchelnikov","doi":"10.1016/j.rsma.2024.103847","DOIUrl":"10.1016/j.rsma.2024.103847","url":null,"abstract":"<div><div>The Black Sea is an inland sea strongly affected by climate change and anthropogenic activities. Regular monitoring is required to keep the sea \"healthy\" and productive. The Ocean Color (OC4), neural network of the Inverse Radiative Transfer Model (NN), generalized inherent optical properties (GIOP) algorithms and a combination of two algorithms of the band ratio and the color index (OCI) were validated using a database of co-located (day-to-day) measurements (145 matchup pairs) and the OLCI onboard Sentinel-3A/3B data. <em>In situ</em> data were collected around the Crimean Peninsula from August 2018 to February 2022. Comparison with in situ data showed, that these algorithms performed imperfectly retrieving chlorophyll <em>a</em> concentration (Chl-<em>a</em>), light absorption coefficient by colored detrital matter <span><math><mrow><msub><mrow><mo>(</mo><mi>a</mi></mrow><mrow><mi>CDM</mi></mrow></msub><mo>)</mo></mrow></math></span> and phytoplankton, which limited the use of these standard satellite products. We validated regional three-band algorithm (Chl-CDM). Statistical analyses demonstrated that the Chl-CDM algorithm provided better performance for <span><math><mrow><msub><mrow><mi>a</mi></mrow><mrow><mi>CDM</mi></mrow></msub><mo>(</mo><mn>490</mn><mo>)</mo></mrow></math></span> and total non-water absorption coefficient (<span><math><mrow><msub><mrow><mi>a</mi></mrow><mrow><mi>tot</mi></mrow></msub><mo>(</mo><mn>490</mn><mo>)</mo></mrow></math></span>) compared to standard algorithms. The Chl-CDM algorithm is suitable for all seasons due to seasonality in absorption parameterization used. Analysis showed limitation of applicability of the current version of Chl-CDM algorithm, namely underestimation of retrieval products in waters with relatively high content of the optically active components (<span><math><mrow><msub><mrow><mi>a</mi></mrow><mrow><mi>tot</mi></mrow></msub><mo>(</mo><mn>490</mn><mo>)</mo><mo>≥</mo><mn>0.1</mn><mspace></mspace></mrow></math></span>m⁻¹), which is connected with the particular spectral bands used. The reasons of observed underestimation of the products in summer and in early autumn might be caused by increasing water turbidity due to coccolithophore blooming. Additional satellite products (euphotic zone and spectral features of downwelling irradiance) were proposed. The Chl-CDM algorithm provides a major step forward for simultaneous retrieval of multiple inherent optical properties and two additionally proposed water quality indicators. This study highlights the need for further improvement of current version of the Chl-CDM algorithm to spread algorithm applicability to waters with high content of optically active components.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}