Journal of Marine Systems最新文献

{"title":"Internal tidal dynamics and associated processes at highly supercritical slopes in Banda Sea: Lessons from the oceanic island of Ambon, eastern Indonesia","authors":"Gerry Giliant Salamena ,&nbsp;Jacobo Martín ,&nbsp;Sem Likumahua ,&nbsp;Ferdimon Kainama ,&nbsp;Daniel Deonisius Pelasula ,&nbsp;Intan Suci Nurhati","doi":"10.1016/j.jmarsys.2024.104020","DOIUrl":"10.1016/j.jmarsys.2024.104020","url":null,"abstract":"<div><div>Interactions between the deep sea and steep-sloping oceanic islands generate physical processes with potential impacts on sediment resuspension and ocean productivity. While studies have been conducted in the open oceans, those focusing on oceanic islands of the deep Banda Sea in eastern Indonesia are lacking. Here, we present the first observational evidence of vertical mechanisms (i.e. internal tidal reflection, internal hydraulic jumps) at the highly supercritical slope in outer Ambon Bay (OAB) in Ambon Island – an oceanic island in the Banda Sea. A 23-h CTD yoyo experiment combined with ADCP measurements conducted during spring flood and ebb tides demonstrated tidally-varying vertical temperature, salinity and density profiles. During spring flood tide, incoming internal tides were reflected by OAB's highly supercritical slope back to the deep sea with isopycnals and isotherms showing sharp downward plunges (downward vertical velocity = 6.5–8.3 × 10⁻³ m/s), and the internal tidal amplitude reaching 90–110 m. The reflection during flood tide caused seaward overturning flow at deeper depths despite the prevailing landward flow at the upper layers. During spring ebb tide, internal hydraulic jumps (upward vertical velocity = 6.1–6.48 × 10⁻³ m/s) occurred to rebound the downward plunges of isopycnals and isotherms as flood tide relaxed with the observed amplitude of internal tides of 90 m. We also observed weakened seaward ebb flow during the isothermal uplifting (when hydraulic jumps occurred), and subsequent intensified landward flow at the end of spring ebb tide indicating strong upslope flow when isotherms reached the maximum shoaling depths. Taken together, the observed vertical mechanisms indicate the conservation of energy at the highly supercritical slope of OAB evident by the comparable vertical velocities. An embedded turbidity-chlorophyll profiler in the CTD reveals that internal tidal activities at the highly supercritical slopes OAB may induce bottom nepheloid layers, and influence ocean productivity by regulating the vertical distribution of phytoplankton biomass.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"246 ","pages":"Article 104020"},"PeriodicalIF":2.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578571","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}

{"title":"Fine-scale phytoplankton community transitions in the oligotrophic ocean: A Mediterranean Sea case study","authors":"Laurina Oms ,&nbsp;Monique Messié ,&nbsp;Jean-Christophe Poggiale ,&nbsp;Gérald Grégori ,&nbsp;Andrea Doglioli","doi":"10.1016/j.jmarsys.2024.104021","DOIUrl":"10.1016/j.jmarsys.2024.104021","url":null,"abstract":"<div><div>The vast diversity of marine phytoplankton, shaped by intricate water dynamics, remains poorly understood in the oligotrophic ocean. <em>In situ</em> studies reveal fine-scale dynamics affecting phytoplankton distribution, leading to abrupt shifts in abundance and biomass referred here as “phytoplankton community transitions” (PCTs). Using a simple nutrient–phytoplankton–zooplankton (NPZ) numerical model, our study proposes a theoretical framework to explain PCTs observed during an oceanographic cruise in the Mediterranean Sea. We consider both a homogeneous and a variable environment, respectively corresponding to the waters on both sides of a front and to the frontal area itself. In the model, PCTs between one community of smaller phytoplankton and one community of bigger phytoplankton are controlled by nutrient supply, but not directly: nutrient supply affects all compartments of the model and creates PCTs by combining bottom-up and top-down controls. This mechanism is observed for both constant (i.e., within a water mass) and pulsed (i.e., in the front) nutrient supply. These results are consistent with <em>in situ</em> observations of biomass proportion across a front. This theoretical framework helps to better understand and plan <em>in situ</em> observations in oceanic regions characterized by fine-scale dynamics and oligotrophic conditions.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"246 ","pages":"Article 104021"},"PeriodicalIF":2.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Summertime nutrient transports in the coastal areas of the Western Northern Yellow Sea","authors":"Chuanxi Xing,&nbsp;Xuefeng Cao,&nbsp;Qian Zhao","doi":"10.1016/j.jmarsys.2024.104018","DOIUrl":"10.1016/j.jmarsys.2024.104018","url":null,"abstract":"<div><div>The summertime nutrient transports in the western Northern Yellow Sea (NYS) have not been well understood due to regional complex physical-biological processes. A coupled model was developed to investigate the summertime nutrient transports in the western NYS. Based on a suite of quantitative skill metrics, the model performance was comprehensively evaluated by comparing the simulated results to a collection of observational data in 2019. The model results were capable of reproducing the observed hydrographical conditions and nutrient distributions in different seasons. In the summer, the coastal areas in the east of Liaodong Peninsula (Zone1) and north of Shandong Peninsula (Zone2) both lost nutrients through cross-boundary nutrient transports for Dissolved Inorganic Nitrogen (DIN) and Dissolved Inorganic Phosphate (DIP). Changes in the surface wind altered the regional circulation and consequently caused variations in nutrient transports for the two zones. Increase in the velocities of southerly wind led to more nutrient losses in Zone1 and less nutrient losses in Zone2. Further sensitivity analysis suggested that the Yalu River was not the dominating factor influencing the nutrient budget of Zone1, and oceanic nutrients contributed around 70 % of the DIN and 99 % of the DIP transported into Zone1. The outflow from Bohai Sea (BS) to NYS dominated the nutrient budget of Zone2. Among the nutrients from the BS, 94.76 % of the DIP were from internal nutrient pool and 3.03 % were from newly input riverine nutrients, those ratios for DIN were 78.79 % and 19.30 %. The Yellow River and Yalu River discharges modulated the regional circulations introducing moderate variations to the nutrient budgets of Zone1 and Zone2.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"246 ","pages":"Article 104018"},"PeriodicalIF":2.7,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142442331","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}

{"title":"Variability of inherent optical properties of seawater in relation to the concentration and composition of suspended particulate matter in the coastal Arctic waters of western Spitsbergen","authors":"Sławomir B. Woźniak ,&nbsp;Dagmara Litwicka ,&nbsp;Joanna Stoń-Egiert ,&nbsp;Dariusz Stramski","doi":"10.1016/j.jmarsys.2024.104019","DOIUrl":"10.1016/j.jmarsys.2024.104019","url":null,"abstract":"<div><div>Inherent optical properties (IOPs) and characteristics of suspended particles in surface seawater samples were measured in summer months of 2021 and 2022 in Arctic fjords and coastal waters of western Spitsbergen in the Svalbard archipelago. The measured IOPs included the spectral backscattering and scattering coefficients of suspended particulate matter, as well as the spectral absorption coefficients of suspended particulate matter and its non-algal particulate and phytoplankton components. The particulate assemblages were characterized by measuring the mass concentrations of suspended particulate matter (SPM), particulate organic matter (POM), particulate inorganic matter (PIM), and phytoplankton pigments including chlorophyll-<em>a</em> (Chl<em>a</em>). The investigated coastal waters exhibit high variability of particulate characteristics and associated IOPs. We observed more than two orders of magnitude variation in SPM and particulate IOPs, and Chl<em>a</em> varied from below the detection limit to more than 3 mg m⁻³. The contribution of organic fraction to SPM (POM/SPM ratio) varied from 0.05 to 0.6, and the Chl<em>a</em>/SPM ratio spanned more than three orders of magnitude with a maximum value of the order of 10⁻³. As a result, the mass-specific optical coefficients, especially the mass-specific backscattering and scattering coefficients of particles and mass-specific absorption coefficient of non-algal particulate matter, exhibit large variations. In addition, our study demonstrates the influences of changes in composition of suspended particulate matter parameterized in terms of POM/SPM and Chl<em>a</em>/SPM ratios on IOPs. Various variants of spectral parametrizations of optical coefficients in terms of univariate or multivariable relationships with particulate characteristics are provided. These parameterizations are representative of the investigated coastal Arctic waters in Svalbard region and can be used for better interpretation of optical measurements, both in-situ and remote, in this Arctic environment.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"246 ","pages":"Article 104019"},"PeriodicalIF":2.7,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531220","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}

{"title":"Modeling the structure changes of cold-water copepods Calanus euxinus population under the influence of the black sea depths deoxygenation","authors":"Elena Vasechkina ,&nbsp;Victor Melnikov","doi":"10.1016/j.jmarsys.2024.104017","DOIUrl":"10.1016/j.jmarsys.2024.104017","url":null,"abstract":"<div><div>The paper presents the results of modeling the possible changes in the structure of the population of <em>Calanus euxinus</em> Hulsemann, 1991 copepods in the Black Sea under the influence of deoxygenation that began in the late 1980s. Over the past 50 years, the depth of oxygen penetration in the deep sea has decreased by almost 50 m. The lower “life limit” of zooplankton in the Black Sea corresponds to the upper boundary of the suboxic layer, where intense copepod aggregation occurs at an oxygen concentration of 10 μM /L. In 1955–1976, this boundary was 130–140 m across the sea, but due to eutrophication and climate change since late 1980s, it has risen in deep water areas to 70–80 m. As a result, the dense copepod layers near the redoxcline and especially their reserve population stock, consisting of non-migrating individuals in diapause, may have been subjected to intensive eating by the Black Sea sprat, which lives to a depth of 100 m and can tolerate hypoxia. To explore this process, we created a new population dynamics model for <em>C. euxinus</em>, which makes it possible to assess changes in the abundance and structure of the population under conditions of a quasi-stationary state and during intensive predation of individuals in diapause. The model describes the dynamics of the <em>Сalanus</em> population based on a statistical description of the relationship between the growth of individuals, their fecundity, the duration of diapause, mortality, and environmental conditions: the concentration of food suspension and temperature in the layer of vertical migration. We put forward the hypothesis that the access of small pelagic fish to the concentration layers of copepods in diapause has a key effect on significant changes in the Black Sea ecosystem, associated with a decrease in the supply of forage plankton and fluctuations in the abundance of pelagic fish.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"246 ","pages":"Article 104017"},"PeriodicalIF":2.7,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142427998","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}

{"title":"Do coastal or equatorial wind anomalies drive the Indian Ocean Dipole?","authors":"Jochen Kämpf","doi":"10.1016/j.jmarsys.2024.104016","DOIUrl":"10.1016/j.jmarsys.2024.104016","url":null,"abstract":"<div><div>Based on first scientific principles, this study shows that both equatorial and coastal wind anomalies influence the development of positive phases of the Indian Ocean Dipole (IOD) in the south-east tropical Indian Ocean (SETIO). While southeasterly winds are favorable for upwelling along Sumatra's southwest coast, zonal equatorial wind anomalies are the main control of IOD variability given that the resultant Kelvin wave enhances or suppresses the Sumatran upwelling. Many previous studies have argued that easterly equatorial wind anomalies in the SETIO are essential for triggering the positive Bjerknes feedback, and thereby, the development of positive IOD (pIOD) events. With a focus on the particularly strong pIOD event of 2019, here we show that pIOD events can also evolve in the absence of zonal equatorial wind anomalies. Hence, it is possible that the Bjerknes feedback along the equator is less involved in IOD variability than previously thought.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"246 ","pages":"Article 104016"},"PeriodicalIF":2.7,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dissolved calcium issues in estuaries and marine areas: Review of the Chinese Coast","authors":"Zhe Zhang ,&nbsp;Ximing Zhang ,&nbsp;Lixin Yi","doi":"10.1016/j.jmarsys.2024.104015","DOIUrl":"10.1016/j.jmarsys.2024.104015","url":null,"abstract":"<div><div>Dissolved calcium plays a critical role in coastal environments, influencing marine ecosystems and fisheries. This review comprehensively examines current research on dissolved calcium along China's coast. Despite its importance, research on dissolved calcium in China's estuarine and coastal areas is still in its early stages, spanning estuaries, continental shelf seas, and bays, yet with limited literature available. This review advocates for the use of automated EGTA (C₁₄H₂₄N₂O₁₀) potentiometric titration for accurate determination and quality control of dissolved calcium. Alternative techniques, such as ion chromatography and ICP-MS, are also viable options, while methods like fluorescence, capillary zone electrophoresis, and pulsed constant current control should be approached cautiously. Thermodynamics, terrestrial inputs, biological activity, and calcification influence dissolved calcium dynamics, resulting in its excess presence. Investigating the distribution and contributing processes of this excess calcium poses significant research challenges. Special scenarios including sea ice, submarine groundwater discharge, and hydrothermal vents warrant further investigation for their impact on excess calcium. Discrepancies between Ω_arag calculated from measured dissolved calcium and carbonate (CO₃²⁻), and apparent solubility product (K_sp) versus calcium-salt ratios, may introduce inaccuracies in acidification assessments. The intricate nature of calcium ions and their geochemical implications should be carefully considered when studying coastal acidification effects on the calcium carbonate system. While focusing on China's coastal regions, insights from these studies could substantially contribute to global research and management of coastal acidification.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"246 ","pages":"Article 104015"},"PeriodicalIF":2.7,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142427997","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}

{"title":"Mid-Summer observations of water column physical properties and circulation in the San Jorge Gulf (Patagonian Shelf)","authors":"Juan Cruz Carbajal ,&nbsp;Cédric Chavanne","doi":"10.1016/j.jmarsys.2024.104014","DOIUrl":"10.1016/j.jmarsys.2024.104014","url":null,"abstract":"<div><div>In this study, we present detailed insights into the mid-summer density field and flow patterns within the San Jorge Gulf (Patagonian Shelf of Argentina). Utilizing unique data acquired from a towed undulating vehicle equipped with a <em>Conductivity-Temperature-Depth</em> (CTD) sensor and a hull-mounted <em>acoustic Doppler current profiler</em> (ADCP), we investigate the spatial distribution and temporal evolution of the density structure and associated currents. Our observations reveal the presence of a distinctive bottom dome-like structure comprised of dense, cold, and saline waters in the central basin of the gulf during mid-summer. Analysis of the flow dynamics indicates the presence of a near-geostrophic flow regime sustaining this dense water feature. Furthermore, our study highlights the significant role of ageostrophic velocities, primarily influenced by the modulation of pycnocline thickness by M₂+M₄ internal tides. These findings contribute to a deeper understanding of the oceanographic processes governing the mid-summer dynamics in the San Jorge Gulf, shedding light on the interaction between density structures and associated currents. Such insights are essential for advancing our knowledge of coastal ocean circulation and its implications for various ecological and environmental phenomena.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"246 ","pages":"Article 104014"},"PeriodicalIF":2.7,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142427999","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}

{"title":"Climate drivers of phytoplankton production along the Chilean coast","authors":"Felipe Tornquist,&nbsp;Grant R. Bigg,&nbsp;Robert G. Bryant","doi":"10.1016/j.jmarsys.2024.104013","DOIUrl":"10.1016/j.jmarsys.2024.104013","url":null,"abstract":"<div><p>The west coast of South America is known for its high primary productivity. The level of phytoplankton can be measured through satellite images that detect chlorophyll (Chl), which is dependent on several oceanographic and meteorological parameters. Climate drivers such as El Niño Southern Oscillation (ENSO) and the Southeast Pacific Subtropical Anticyclone (SPSA) affect these parameters and, consequently, the phytoplankton. The objective of this study was to identify the impact of ENSO on SPSA, climate variables, and phytoplankton patterns. Composites were created using the years selected with either strongly positive or negative ENSO to understand their influence on different parameters. To create the Chl composite, it was necessary to extend it using Canonical Correlation Analysis (CCA) based on the sea surface temperature (SST) pattern. The study concludes that ENSO has a noticeable impact on Chl, mainly in the Southern Zone during the warm season. This is driven by the expansion of SPSA to the South, which increases the sea level pressure (SLP) in that region. However, predicting the Chl concentration has a high degree of uncertainty due to its complexity.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"246 ","pages":"Article 104013"},"PeriodicalIF":2.7,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0924796324000514/pdfft?md5=f921de2c2ad1002ce1fe9bbe33de8092&pid=1-s2.0-S0924796324000514-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142244169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A multidecadal study of the Malabar upwelling system influencing Indian Mackerel landings along the coasts of Karnataka and Kerala, south-east Arabian Sea","authors":"Sneha Jha,&nbsp;Surya Datta Sudhakar,&nbsp;Swarnali Majumder,&nbsp;Sudheer Joseph,&nbsp;T.M. Balakrishnan Nair","doi":"10.1016/j.jmarsys.2024.104012","DOIUrl":"10.1016/j.jmarsys.2024.104012","url":null,"abstract":"<div><p>Indian Mackerel (<em>Rastrelliger kanagurta</em>) is an essential small pelagic fishery resource, contributing to nearly 30 % of India's total marine fish landing. However, this species' life cycle and stock status are poorly understood and data deficient. Ocean mesoscale events are also known to influence their landing, besides the environmental factors like- salinity, chlorophyll, and sea surface temperature, affecting these small pelagic fishes' availability, migration, feeding, and reproductive activity. The Malabar upwelling region (southwest coast of India) is a significant upwelling system where upwelling occurs during the monsoon months. The nutrient-rich water increases the productivity of surface water, leading to plankton abundance. This productivity sustains a fishery for several commercially important fishes, mainly small pelagics such as sardines, mackerels, and anchovies, supporting India's most significant coastal pelagic fishery. For understanding the relationship between the target fish and the oceanographic events, in the present study, Pearson's correlation has been estimated between Indian Mackerel landing, rainfall, Sea water temperature at 0, 10, 20, 30, 45, and 50 m depths, mixed layer depth (MLD), their anomalies and occurrences of potential fishing zone (PFZ) lines along the Malabar upwelling region and corresponding coasts of Karnataka and Kerala. Mackerel landing time series showed a significant autocorrelation in four-quarter lag, correlation with rainfall anomaly in one-quarter lag, with PFZ line and MLD in three-quarter lag, and with SWT@50 (Seawater temperature@50 m depth) and SST anomaly in two-quarter lag both in Karnataka and Kerala. Upwelling events, as indicated by the presence of PFZ lines, were found to significantly impact the landings of Indian mackerel along the Karnataka and Kerala coasts. Polynomial equations were used to model the relationship between mackerel landings and these environmental factors, effectively capturing the influence of these parameters on mackerel catch trends.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"246 ","pages":"Article 104012"},"PeriodicalIF":2.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142230454","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}