Journal of Marine Systems最新文献

{"title":"Provenance of sediments from the Niger Delta, Gulf of Guinea: Evidence from geochemistry","authors":"Lan-Xin Sun ,&nbsp;Xue-Gang Chen ,&nbsp;Dai-Dai Wu ,&nbsp;Li-Hua Liu ,&nbsp;Guang-Rong Jin ,&nbsp;Xue-Qin Wei","doi":"10.1016/j.jmarsys.2022.103794","DOIUrl":"10.1016/j.jmarsys.2022.103794","url":null,"abstract":"<div><p><span><span>The Gulf of Guinea is surrounded by numerous waterways, where several rivers flow into the ocean, and the Niger River brings large amounts of land-derived debris into the Niger Delta every year. However, geochemical characteristics and sources of sediments in this region are still poorly constrained. Here, we collected two cores (GC09 and GC10) on the shelf and one core (GC05) on the shelf break of the Niger Delta, Gulf of Guinea to assess their provenance using total carbon (TC), total organic carbon (TOC), major elements, and trace elements. The results indicate that sediments on the Niger Delta are classified as iron-rich </span>silty clay and silty clay based on their geochemical compositions. Surface sediments are enriched in quartz and feldspar, evidenced by relatively high levels of SiO</span>₂, Al₂O₃, NaO₂, K₂<span><span>O and CaO. Trace element ratios and TOC demonstrate organic matters were mainly derived from terrestrial inputs and were deposited under aerobic conditions<span>. Geochemical index data (TOC, REEs, δCe, δEu) reflect that the </span></span>redox conditions<span><span><span> of deposition are more inclined to aerobic environment; the sea level gradually decreased and induced more oxic depositional environment over time. According to the location of the three sampling sites, the proportion of felsic in the provenance of sediments increased towards the mainland while the proportion of mafic decreased. With the increasing of water depth, the proportion of felsic source decreases from ~67% at GC10 site (Water depth is 1418 m) to ~50% at GC05 site (Water depth is 3245 m). In contrast, the proportion of mafic source increase from ~25% at GC05 site to ~50% at GC09 site (Water depth is 1377 m). Using chemical index of alteration (CIA), it is manifested that the sediments show high maturity and have experienced strong chemical weathering. Statistical analyses indicate terrigenous inputs contribute more than half materials for the Niger Delta sediments. The relatively stable depositional environment in this region favors the formation and development of </span>gas hydrates. This study could be used to infer the sediment sources and </span>paleoenvironment changes during sedimentation and also provide reliable information for a better understanding of sedimentary processes in global gas hydrate-related deltas.</span></span></p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"235 ","pages":"Article 103794"},"PeriodicalIF":2.8,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46223344","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":"The 18.6-year lunar nodal cycle may affect ecosystems on the Northwest Atlantic continental shelves","authors":"Pierre Poitevin ,&nbsp;Pascal Lazure ,&nbsp;Virginie Roy ,&nbsp;Sébastien Donnet ,&nbsp;Laurent Chauvaud","doi":"10.1016/j.jmarsys.2022.103783","DOIUrl":"10.1016/j.jmarsys.2022.103783","url":null,"abstract":"<div><p>As one of the foremost global forcings, tidal circulation exerts a pervasive influence on biological and physical processes occurring in the world's oceans on hourly to decadal time scales. This research identified the 18.6-year periodic variation in the lunar orbital plane within an annually resolved 140-year (1875 to 2015) shell growth master chronology measured from 21 live collected <span><em>Arctica islandica</em></span><span><span><span>, a bivalve known to be one of the longest lived non-colonial animals. The potential ecological implications of this result warranted detailed inventory of underlying physical processes. The absence of long-term in situ hydrological data for the bivalve's habitat was circumvented by the use of satellite data and numerical modeling which show that coastal regions of the Northwest Atlantic shelf clearly record diurnal </span>tidal currents influenced by the 18.6-year nodal </span>lunar cycle. The approach described here demonstrates that combining physical and biological data can help to identify subtle ecological processes over long time-scales for accurately disentangling the latter from variation introduced by anthropogenic climate change.</span></p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"235 ","pages":"Article 103783"},"PeriodicalIF":2.8,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42217617","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":"Region-dependent eddy kinetic energy budget in the northeastern South China Sea revealed by submesoscale-permitting simulations","authors":"Yuelin Liu ,&nbsp;Xincheng Zhang ,&nbsp;Zhongbin Sun ,&nbsp;Zhiwei Zhang ,&nbsp;Hideharu Sasaki ,&nbsp;Wei Zhao ,&nbsp;Jiwei Tian","doi":"10.1016/j.jmarsys.2022.103797","DOIUrl":"10.1016/j.jmarsys.2022.103797","url":null,"abstract":"<div><p><span>Mesoscale eddies are active in the northeastern South China Sea (NESCS) and play an important role in the oceanic energy balance therein. In this study, the budgets of mesoscale eddy kinetic energy (EKE) in the NESCS were explored by simultaneously considering the interactions with both large-scale and submesoscale processes based on high-resolution simulations. We found that the regions southwest of Taiwan (SWT) and Luzon Strait (LS) are two energy-cascading hotspots, but they present quite different EKE budgets. Specifically, in the SWT, which has strong EKE, the baroclinic conversion associated with the release of available potential energy is the dominant EKE source, while the barotropic conversion between large-scale and mesoscale processes (BT</span>_LM) and the wind stress work are the main EKE sinks. In addition, submesoscale processes are found to transfer energy reversely to mesoscale eddies, but at lower magnitudes. For the LS, which shows complicated island topography and energetic large-scale and submesoscale activities, the BT_LM is the dominant EKE source, while the transfer of energy to submesoscale processes is an important EKE sink. This means that the kinetic energies in these two regions display opposing cascading directions. The cascade direction is inverse, from submesoscale to large-scale, in the SWT and forward, from large-scale to submesoscale, in the LS. These results expand our understanding of the EKE balance and energy cascade in the NESCS among multiscale dynamic processes and offer beneficial implications for improving parameterizations in ocean circulation models.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"235 ","pages":"Article 103797"},"PeriodicalIF":2.8,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42738231","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":"Effects of swell waves on the dynamics of the estuarine turbidity maximum in an idealized convergent partially mixed estuary","authors":"Wenping Gong ,&nbsp;Guang Zhang ,&nbsp;LirongYuan ,&nbsp;Lei Zhu ,&nbsp;Heng Zhang","doi":"10.1016/j.jmarsys.2022.103784","DOIUrl":"10.1016/j.jmarsys.2022.103784","url":null,"abstract":"<div><p>The dynamics of estuarine sediments<span><span><span> plays a key role in the morphological evolution, water quality, and ecosystem health of estuaries. Estuarine </span>turbidity maxima (ETMs) are ubiquitous in estuaries worldwide and have drawn enormous attention from researchers. Here, we use a coupled ocean–atmosphere–wave–sediment transport modeling system to examine the effects of swell waves on the location, extent, and </span>suspended sediment<span> concentration (SSC) of ETMs in a convergent partially mixed estuary. Our results reveal that swell waves influence the residual circulation, mixing, and bottom stress in the estuary. The wave–current interaction increases the bottom stress in the estuary but reduces mixing in the lower to middle reaches of the estuary, owing to the enhanced landward salt transport, and the increased stratification. The reduced mixing enhances the estuarine circulation<span> in the middle reach of the estuary. These changes cause a landward shift of the primary ETM and an increase in the SSC in the lower estuary. Moreover, the Coriolis force changes the ETM distribution and influences the wave effects. Overall, the findings of this study further elucidate ETM dynamics in an estuary.</span></span></span></p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"235 ","pages":"Article 103784"},"PeriodicalIF":2.8,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47328572","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":"Spatio-temporal patterns of sponge strandings in the southern Gulf of Mexico: The role of cold front events","authors":"Enrique Ávila ,&nbsp;Laura Elena Vázquez-Maldonado ,&nbsp;Jorge Luis Alfonso-Ortíz","doi":"10.1016/j.jmarsys.2022.103795","DOIUrl":"10.1016/j.jmarsys.2022.103795","url":null,"abstract":"<div><p><span>Remnants of marine invertebrates are common in the wrack line of the coasts of many regions worldwide. However, little is known about its spatial and temporal variation. This study aimed to investigate the inter-site and intra-annual variability in species composition, abundance, and biomass of sponge strandings on the coast of a southern Gulf of Mexico tropical island. The environmental factors (oceanographic and meteorological) influencing such spatio-temporal variations on abundance and biomass of sponge strandings were also investigated. From a total of 21 demosponge species identified, three species of genus </span><em>Clathria</em><span> (with erect growth forms and a small basal area) were dominant in terms of abundance (93%) and biomass (89%). Both, the monthly average abundance and biomass varied significantly throughout the year, with maximum peaks during the cold fronts season. Only in the case of abundance, a combination of four predictor variables (wind speed, wave height, frequency of southeast winds, and frequency of north winds) explained 84.2% of its intra-annual variability. Results also showed that cold fronts (especially the stronger ones), aside from cyclonic events, can act as disruptive events regulating sponge populations in the coastal zone. Regarding the spatial variability, it was attributed to inter-site differences in the degree of exposure to hydrodynamic forces and the type of substrate. This study contributes to the knowledge of the biodiversity of sponge species in this coastal region of the Gulf of Mexico and demonstrates that large-scale seasonal events such as cold fronts can influence their temporal dynamics.</span></p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"235 ","pages":"Article 103795"},"PeriodicalIF":2.8,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46900480","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":"Long-term zooplankton variability in the southern Patagonian shelf, Argentina","authors":"Georgina D. Cepeda ,&nbsp;Andrés J. Jaureguizar ,&nbsp;Harold Fenco ,&nbsp;Raúl Reta ,&nbsp;Marina E. Sabatini","doi":"10.1016/j.jmarsys.2022.103782","DOIUrl":"10.1016/j.jmarsys.2022.103782","url":null,"abstract":"<div><p>Zooplankton can amplify changes resulting from physical forcing associated with climate change at interannual and longer time scales, so multi-year time series data for the pelagic assemblage can provide useful information about climate-ecosystem interactions. Zooplankton biomass and taxonomic composition were analyzed for the region over the southern Patagonian shelf (SPS) for March 1994 to 2012 to describe interannual patterns of variation, determine the spatial consistency and dominant scale of temporal variability, and examine their relation to the regional hydrography. The biomass of selected taxa, including primarily copepods, amphipods, and euphausiids, decreased in 2003 and remained low until 2012. These patterns were associated with a moderate increase in sea surface temperature<span>. Our observations could not establish the causal mechanisms, but the observed biomass decrease might be related to variation in northward current flow over the SPS, which is driven by large-scale climatological forcing and would result in reduced cold-water availability over SPS. Understanding the drivers of interannual variability in zooplankton composition and biomass of this ecosystem is essential for prediction of impacts of climate change on the pelagic ecosystem, including important commercially fished species.</span></p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"235 ","pages":"Article 103782"},"PeriodicalIF":2.8,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42360963","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":"Emission load, flux and estuarine modulation of ammonium and phosphate from a small subtropical river basin to the coast","authors":"Théo Dias Arueira ,&nbsp;Björn Kjerfve ,&nbsp;Carolina Cloris Lopes Benassuly ,&nbsp;Paula Sagilião Isacksson ,&nbsp;Anandra Machado ,&nbsp;Francisco de Assis Esteves ,&nbsp;Maurício Mussi Molisani","doi":"10.1016/j.jmarsys.2022.103786","DOIUrl":"10.1016/j.jmarsys.2022.103786","url":null,"abstract":"<div><p>Small river basins represent an important source of dissolved nutrients to the coast, which are fundamental to coastal primary production. However, such transport is a resultant of nutrient fluxes from small rivers, estuarine modulation and, currently, anthropic emission loads. In this context, this study assessed ammonium (NH₄⁺) and phosphate (PO₄³⁻<span><span>) dynamics in a small subtropical river-estuary system by addressing seasonal fluxes from the river to the estuary, as well as the estuarine spring-neap tidal modulation, the resultant fluxes to the coast, and the influence of natural processes and </span>anthropogenic activities on the land-sea nutrient dynamics. The results indicated that NH</span>₄⁺ and PO₄³⁻ fluxes in the small river-estuary system were influenced by anthropic emission loads and by estuarine modulation through amplification of river discharge and NH₄⁺ and PO₄³⁻ concentrations and fluxes within the estuary. During most of the time, the small river-estuary system exported such dissolved nutrients to the coast, likely contributing to coastal primary production.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"235 ","pages":"Article 103786"},"PeriodicalIF":2.8,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45553867","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":"Interannual variations and their dynamic mechanisms of wintertime temperature inversions in the Gulf of Alaska","authors":"Shaojing Guo ,&nbsp;Chunsheng Jing ,&nbsp;Weibo Wang ,&nbsp;Yun Qiu ,&nbsp;Shanwu Zhang","doi":"10.1016/j.jmarsys.2022.103793","DOIUrl":"10.1016/j.jmarsys.2022.103793","url":null,"abstract":"<div><p><span>Using the Simple Ocean Data Assimilation<span> Version 2.2.4 dataset from 1950 to 2010, we analyzed the interannual variations in wintertime temperature inversions in the Gulf of Alaska (GOA), and the linkages to the Aleutian Low are also examined. The results show that the climatological wintertime temperature inversions is predominantly distributed in the northwestern GOA (NWGOA) and northern GOA (NGOA), in which it is stronger in the NWGOA than in the NGOA. Interannual variations in the temperature difference (∆</span></span><em>T</em>) are pronounced and are mainly controlled by the temperature minimum (<em>T</em>_<em>min</em>) of the inversions layer. The temperature inversions layer became warmer and shallower during 1950–2010, among <em>T</em>_<em>min</em> and the temperature maximum (<em>T</em>_<em>max</em>) was notably warming, and the upper edge depth (<em>D</em>_<em>min</em>) and lower edge depth (<em>D</em>_<em>max</em>) revealed significant shoaling. ∆<em>T</em><span> decreased by 0.12 °C from 1950 to 2010 in the NWGOA but had no trend in the NGOA. The interannual variations in wintertime temperature inversions are controlled by the mixed-layer temperature anomalies and are closely correlated with the changes in the Aleutian Low. The weakened (deepened) Aleutian Low during strong (weak) ∆</span><em>T</em><span> winters could cause the weakening (enhancement) of the cyclone wind field in the North Pacific subarctic region, which is conducive to slowing down (spinning up) the flow of the Alaskan Gyre and the transportation of warm air into the GOA. Thus, a negative (positive) </span><em>T</em>_<em>min</em> anomalies within the mixed layer is larger than <em>T</em>_<em>max</em> anomalies, resulting in a larger (smaller) ∆<em>T</em>; meanwhile, the strong (weak) cooling effect leads to a deeper (shallower) <em>D</em>_<em>max</em><span>. The interannual variations in the wintertime temperature inversions could be influenced by net heat flux and advection anomalies in the NWGOA, but only caused by net heat flux anomalies in the NGOA.</span></p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"235 ","pages":"Article 103793"},"PeriodicalIF":2.8,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48157392","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":"Distribution of marine benthic diatoms on the coasts of the sea of Marmara and their responses to environmental variables","authors":"Reyhan Akcaalan,&nbsp;Aydın Kaleli,&nbsp;Latife Köker","doi":"10.1016/j.jmarsys.2022.103780","DOIUrl":"10.1016/j.jmarsys.2022.103780","url":null,"abstract":"<div><p><span>The Sea of Marmara, located in northwest Turkey, comprises challenging environmental conditions and is an important bridge between the Black Sea and the Aegean Sea. In this study, we assessed the trophic situation of the coasts of the Sea of Marmara using the benthic diatom composition and their relation to the environmental variables in the spring and autumn of 2019 and 2020. A total of 120 samples were collected and 452 species were observed; </span><span><em>Navicula</em></span> Bory and <span><em>Nitzschia</em></span><span><span><span> Hassal were represented with the highest numbers of taxa. Analysis of Similarity (ANOSIM) revealed that diatom communities differed significantly between the spring-autumn periods and years. Canonical Correspondence Analysis (CCA) showed that diatoms grouped under water, temperature, salinity, dissolved oxygen, and </span>TIN influence. TRIX observations revealed a highly mesotrophic-eutrophic status along the coasts. Our study contributes to the knowledge of diatom diversity, distribution and community changes in spring and autumn on the coasts Sea of Marmara. Our findings suggest that marine benthic diatoms could be used as </span>eutrophication indicators in the coastal waters for long-term monitoring with the support of environmental parameters.</span></p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"234 ","pages":"Article 103780"},"PeriodicalIF":2.8,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49494216","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":"Vertical distribution of picophytoplankton in the NW shelf and deep-water area of the Black Sea in spring","authors":"Vladimir Mukhanov ,&nbsp;Evgeniy Sakhon ,&nbsp;Natalia Rodionova ,&nbsp;An-Yi Tsai","doi":"10.1016/j.jmarsys.2022.103779","DOIUrl":"10.1016/j.jmarsys.2022.103779","url":null,"abstract":"<div><p><span>Structure and functions of picophytoplankton and their links to the water column density stratification and nutrient vertical profiles were studied in the Black Sea open waters along a transect from the Western Gyre to the NW shelf during spring homothermy in April of 2017. Abundances of picocyanobacteria of the genus </span><span><em>Synechococcus</em></span> (0.85 ± 0.96 (SD) × 10³ cells ml⁻¹) and eukaryotic picoalgae (5.74 ± 5.99 × 10³ cells ml⁻¹) and their intracellular pigment (chl <em>a</em>, phycoerythrin) contents were quantified using flow cytometry. The distribution of these variables in the upper 100-m layer was non-uniform. Along the whole transect, <em>Synechococcus</em><span> and picoeukaryote abundance maxima (up to 4 × 10</span>³ and 3 × 10⁴ cells ml⁻¹, respectively) were observed at the water temperature of 8–8.5°С in the depth range between 30 and 40 m. Picoeukaryotes dominated the total community. The share of <em>Synecococcus</em> averaged about 22% and increased with depth up to 80%. Picophytoplankton abundance dropped abruptly through the oxycline but the cells were found in the suboxic layer at about 10³ cells ml⁻¹ and in a sample from the anoxic zone at 10² cells ml⁻¹. Intracellular chl <em>a</em> maxima were revealed in the nitrate peak at sigma-<em>t</em><span><span> density of 15.5. In the surface and suboxic layers, non-specific green autofluorescence (GAF) was detected in picophytoplankton cells that might provide evidence of their stress state in adverse environment. Multivariate analysis has revealed tight coupling between abiotic and microbiological variables in three statistically distinct pelagic regions of the transect, corresponding to the abyss, the </span>continental slope and the shelf.</span></p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"234 ","pages":"Article 103779"},"PeriodicalIF":2.8,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48416936","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}