Marine Chemistry最新文献

{"title":"Corrigendum to “Boron to salinity ratios in the Fram Strait entering the Central Arctic: The role of sea ice formation and future predictions” [Marine Chemistry 267 (2024) 104463]","authors":"Samantha Rush , Penny Vlahos , Chang-Ho Lee , Kitack Lee , Lauren J. Barrett","doi":"10.1016/j.marchem.2025.104534","DOIUrl":"10.1016/j.marchem.2025.104534","url":null,"abstract":"","PeriodicalId":18219,"journal":{"name":"Marine Chemistry","volume":"272 ","pages":"Article 104534"},"PeriodicalIF":3.0,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605740","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":"Pollution assessment and ecological risk of organic contaminants in a river-estuary of the northeastern Brazilian semi-arid: Traditional and emerging contaminants unraveling rural and urban activities","authors":"Lorena S. Nascimento ,&nbsp;Felipe R. Santos ,&nbsp;Pollyana C.V. Morais ,&nbsp;Allyne F. Gama ,&nbsp;Márcia C. Bícego ,&nbsp;Satie Taniguchi ,&nbsp;Rafael A. Lourenço ,&nbsp;César C. Martins ,&nbsp;Lucas B. Moreira ,&nbsp;Rivelino M. Cavalcante","doi":"10.1016/j.marchem.2025.104544","DOIUrl":"10.1016/j.marchem.2025.104544","url":null,"abstract":"<div><div>Surface sediments from the Jaguaribe River, in a Brazilian semi-arid region, were investigated for the presence of traditional and emerging organic contaminants to identify the multiple pollution sources in the area. Aliphatic and polycyclic aromatic hydrocarbons were linked to phytoplankton, microbiological species, specific vegetation, and minimal petroleum and pyrolysis compounds. Regarding sterols, higher contributions from stigmasterol and cholesterol were associated with higher plants and zooplankton, respectively. However, coprostanol levels suggested fecal contamination from large mammals, corroborated by the predominance of synthetic over natural hormones. The main origins found for pesticides were their use in health campaigns, agriculture, and domestic use. The toxicity assessment revealed that all stations presented a high risk to biota, especially from hormone and pesticide compounds. This multimolecular approach allowed the identification and differentiation of pollution sources from urban and rural activities and the potential risk for the biota in an important region of Brazil.</div></div>","PeriodicalId":18219,"journal":{"name":"Marine Chemistry","volume":"272 ","pages":"Article 104544"},"PeriodicalIF":3.0,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596476","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":"Dust deposition directly affects the concentration of dissolved organic carbon in the ocean","authors":"Rianne J.M. van Kaam,&nbsp;Martin Kölling,&nbsp;Marcus Elvert,&nbsp;Kai-Uwe Hinrichs,&nbsp;Matthias Zabel","doi":"10.1016/j.marchem.2025.104531","DOIUrl":"10.1016/j.marchem.2025.104531","url":null,"abstract":"<div><div>Dust deposition to the ocean plays an indirect role in the carbon cycle due to stimulating the primary production by fertilisation. Additionally, it transports carbon to the ocean floor by acting as ballast for marine aggregates. Despite these recognized impacts, the direct influence of dust-seawater interactions on the carbon cycle remains poorly understood. Here, we study the effects of mineral dust on the dissolved organic carbon (DOC) concentration in seawater by performing sorption experiments through time series and stable carbon isotope analysis. We added two different amounts of dust to a solution of artificial seawater and ¹³C-labelled dissolved organic matter from <em>Spirulina</em> extract, creating a low and high dust-seawater ratio system. After 72 h, we observe a decrease in DOC for both systems, indicating the adsorption of DOC from the <em>Spirulina</em> extract onto dust particles. Analysis of the stable carbon isotope ratios of total organic carbon on the dust samples, before and after the sorption experiments, confirms these findings. Furthermore, our study shows that the net uptake of DOC on dust depends on the relative importance of adsorption, release and degradation of organic carbon. DOC release can become the dominant process based on the dust-seawater ratio and the initial organic carbon present on the dust, demonstrating that dust can act as both a sink and a source of organic carbon in the near-surface waters.</div></div>","PeriodicalId":18219,"journal":{"name":"Marine Chemistry","volume":"271 ","pages":"Article 104531"},"PeriodicalIF":3.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144557449","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":"Diatom-induced calcification in coastal marine environments: Biomineralization threshold and mechanism","authors":"Qixian Chen ,&nbsp;Yifan Li ,&nbsp;Chen-Tung Arthur Chen ,&nbsp;Zong-Pei Jiang ,&nbsp;Wei-Jun Cai ,&nbsp;Hongwen Pan ,&nbsp;Yunwen Shen ,&nbsp;Zesheng Ding ,&nbsp;Yanan Di ,&nbsp;Chenba Zhu ,&nbsp;Nianzhi Jiao ,&nbsp;Yiwen Pan","doi":"10.1016/j.marchem.2025.104533","DOIUrl":"10.1016/j.marchem.2025.104533","url":null,"abstract":"<div><div>Diatoms play a pivotal role in the ocean, contributing approximately 40 % of marine primary production, with nearly half of the particulate organic carbon being exported. The recent discovery of a novel diatom-induced calcification pathway has attracted significant attention due to its implications for marine carbon, calcium, and silicon cycling. Despite its potential, the lack of a quantitative initiation threshold and comparative analysis with known calcifying organisms limit our ability to predict its ecological impact, particularly on carbon sequestration. This study addresses these gaps by cultivating the common diatom species, <em>Skeletonema costatum</em>, under simulated marine conditions to evaluate its CaCO₃ precipitation potential and define the biogeochemical threshold for calcification. The experimental results showed that <em>S. costatum</em> can induce calcification across a range of environmental conditions, including varying dissolved inorganic carbon (DIC 1837 to 2709 μmol·kg⁻¹), nitrogen sources (NH₄⁺ or NO₃⁻), and cell densities (10⁴ to 10⁵ cells·mL⁻¹). Calcification was initiated when the aragonite saturation state (Ω_arag) exceeded ∼8. The calcification rate exhibits a linear correlation with Ω_arag in the bulk solution, categorizing it as a “biologically induced” process. Our findings highlight similarities between the calcification mechanisms of <em>S. costatum</em> and other calcifying organisms, revealing the common ality of environmental drivers. This study advances our understanding of diatom-induced calcification, offering insights into its role in the marine carbon cycle and potential contributions to carbon sequestration strategies.</div></div>","PeriodicalId":18219,"journal":{"name":"Marine Chemistry","volume":"271 ","pages":"Article 104533"},"PeriodicalIF":3.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524021","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":"Copper-binding organic ligands and phytoplankton growth in Japanese coastal waters","authors":"Wiwit ,&nbsp;Kuo Hong Wong ,&nbsp;Chia-Jung Lu ,&nbsp;Hideki Fukuda ,&nbsp;Hiroshi Ogawa ,&nbsp;Shigenobu Takeda ,&nbsp;Kazutaka Takahashi ,&nbsp;Asami S. Mashio ,&nbsp;Hajime Obata","doi":"10.1016/j.marchem.2025.104532","DOIUrl":"10.1016/j.marchem.2025.104532","url":null,"abstract":"<div><div>Although copper (Cu) is necessary for phytoplankton growth, it becomes toxic at high concentrations. The bioavailability and toxicity of Cu are governed by its chemical speciation, with free inorganic Cu²⁺ being the most toxic species. In this study, we estimated free Cu²⁺ concentrations in Japanese coastal waters to evaluate the effects of Cu toxicity on phytoplankton growth. Incubation experiments were conducted using natural phytoplankton assemblages in seawater collected from Otsuchi Bay, northeastern Japan, and Goto-nada in the East China Sea. The cells were incubated for 14 days with Cu additions of up to 100 nM. Copper speciation parameters were determined using the reverse titration methods with competitive ligand exchange adsorptive cathodic stripping voltammetry (CLE-AdCSV). Chlorophyll-<em>a</em> concentrations increased with the addition of &lt;10 nM Cu but decreased at 100 nM Cu due to Cu toxicity. We found that phytoplankton growth caused negligible increases in Cu-binding organic ligand concentrations. Free Cu²⁺ concentrations were simulated using the initial Cu speciation parameters obtained from the reverse titration method under varying Cu concentrations. When assuming the presence of only one class of organic ligands, the estimated Cu²⁺ concentrations were inconsistent with the incubation results. In contrast, by considering two classes of ligands, the increase in the concentration of Cu²⁺ closely matched the incubation data. This suggests that the resolution of the weaker class of organic ligands is crucial for evaluating Cu toxicity in seawater.</div></div>","PeriodicalId":18219,"journal":{"name":"Marine Chemistry","volume":"271 ","pages":"Article 104532"},"PeriodicalIF":3.0,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144501772","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":"Tracing cross-shelf transport and accumulation of particulate organic carbon in the continental margin bottom sediments using Aluminum and 210Pb","authors":"Hojong Seo ,&nbsp;Guebuem Kim","doi":"10.1016/j.marchem.2025.104530","DOIUrl":"10.1016/j.marchem.2025.104530","url":null,"abstract":"<div><div>We investigated particulate organic carbon (POC) transport across the shelf to the basin bottom in the East/Japan Sea, using Aluminum (Al) and ²¹⁰Pb as tracers. Our results show that the sedimentary deposition of ²¹⁰Pb in the basin (2327 m) is comparable with the scavenging removal flux from the water column (117 ± 15 %), whereas it increases threefold in the shelf (296 ± 50 %) (200 m), suggesting substantial lateral inputs of land- and shelf-origin sediments. We also show that conventionally used excess ²¹⁰Pb-derived sedimentation rates without considering mixing can be overestimated by 3–8 times in continental margin sediments, where sedimentation rates are low (&lt; 0.15 cm yr⁻¹), leading to significant overestimation of POC burial fluxes. Sedimentation rates based on an Al mass balance with sedimentary ²¹⁰Pb budgets align more closely with those from ¹⁴C and tephra analyses in this region. A POC box model using the refined sedimentation rate indicates that POC burial fluxes in the East Sea are 0.3–1.0 % of primary production. These values are four times lower than previous estimates based on ²¹⁰Pb-derived sedimentation rates in the same region, but consistent with those observed in similar oceanic settings. Additionally, the POC box model suggests that sediment resuspensions can significantly contribute (34–70 %) to sinking POC fluxes in the bottom sediments. Thus, our results highlight that in continental margins, where ²¹⁰Pb decay and mixing are difficult to distinguish due to slow sedimentation rates, traditional ²¹⁰Pb dating methods can significantly overestimate sedimentation rates and associated material fluxes.</div></div>","PeriodicalId":18219,"journal":{"name":"Marine Chemistry","volume":"271 ","pages":"Article 104530"},"PeriodicalIF":3.0,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144230867","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":"Spatial variability of marine carbonate system along the Drake Passage and northern Antarctic Peninsula during the austral summer","authors":"Thiago Monteiro ,&nbsp;Matheus Batista ,&nbsp;Rodrigo Kerr","doi":"10.1016/j.marchem.2025.104529","DOIUrl":"10.1016/j.marchem.2025.104529","url":null,"abstract":"<div><div>The influence of physical and biogeochemical processes on the variability of the carbonate system in the Southern Ocean remains poorly constrained. Understanding this influence is crucial to distinguish natural variations from anthropogenic impacts and accurately interpret observed trends. Here, we investigate how physical and biogeochemical processes influence the spatial distribution of summer carbonate system variables along the Drake Passage and northern Antarctic Peninsula. Continuous, high-frequency surface partial pressure of CO₂ (<em>p</em>CO₂), dissolved oxygen (O₂) and essential hydrographic variables were collected during the austral summer of 2019, whereas other carbonate system variables were estimated after the reconstruction and evaluation of total alkalinity. Our findings show that in the Drake Passage, Circumpolar Deep Water upwelling increases the <em>p</em>CO₂ (&gt; 400 μatm) and dissolved inorganic carbon (&gt; 2175 μmol kg⁻¹), leading to reduced pH (&lt; 7.99) south of the Polar Front. North of the Polar Front, photosynthesis lowers <em>p</em>CO₂ (&lt; 390 μatm), while increasing pH (&gt; 8.00) and carbonate ions (&gt; 110 μmol kg⁻¹), with enrichment occurring in the Subantarctic coccolithophore growth region. Along the northern Antarctic Peninsula, including Gerlache Strait, Antarctic Sound, and Admiralty Bay, photosynthesis and sea ice/glacial melt are the main drivers of <em>p</em>CO₂ reductions to levels below 350 μatm. The mixing of Circumpolar Deep Water with Weddell Sea Dense Shelf Water can naturally and anthropogenically raise <em>p</em>CO₂ and decrease pH in northern Antarctic Peninsula waters, where pH is generally lower (as low as 7.90) compared to adjacent areas. Nevertheless, most environments remain supersaturated with respect to carbonate minerals calcite and aragonite, although signs of aragonite undersaturation have occur in surface waters influenced by Dense Shelf Water. These findings offer new insights into carbonate system processes across a large Southern Ocean region, improving understanding of spatial variability in marine carbon dynamics.</div></div>","PeriodicalId":18219,"journal":{"name":"Marine Chemistry","volume":"271 ","pages":"Article 104529"},"PeriodicalIF":3.0,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144205285","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":"In situ measurement of trace sulfide concentrations in marine coastal waters using diffusive gradient in thin film passive samplers","authors":"Kevin Diaz ,&nbsp;David Point ,&nbsp;Wilson Carhuapoma ,&nbsp;Astrid Avellan ,&nbsp;Maricarmen Igarza ,&nbsp;Jesús Ledesma ,&nbsp;Fanny Rioual ,&nbsp;Michelle Graco","doi":"10.1016/j.marchem.2025.104521","DOIUrl":"10.1016/j.marchem.2025.104521","url":null,"abstract":"<div><div>The diffusive gradient in thin film technique (DGT) represents an <em>in situ</em> passive sampling method designed to preconcentrate various compounds, including sulfides, for detection at low concentrations. While DGT applications for sulfides have been studied in freshwater, this research extends its use to marine environments. A detailed methodology is presented for synthesizing, assembling, calibrating, and field-deploying DGT samplers to measure sulfides in the low micromolar range in marine waters. The in-house DGT samplers developed in this study demonstrated improved performance, with more homogeneous binding gels and smaller silver iodide particles (0.51 ± 0.34 μm) compared to commercial alternatives. Grayscale imaging enabled accurate quantification of sulfide accumulation in the gels, confirming the method's reliability for detecting trace-level sulfides in marine environments. Comparative analysis showed in-house and commercial samplers performed similarly in estimating sulfide concentrations. Field deployments along the Peruvian coast revealed significant vertical and spatial sulfide gradients. In the Callao coastal area (12°S) (July–August 2022), concentrations ranged from 0.03 to 0.45 μM across a 35 m depth profile. In Paracas bay (13.8°S) (March–April 2023), a shallower coastal station, concentrations ranged from 1.17 to 6.46 μM, reflecting increased benthic production. These results highlight the utility of DGT samplers as cost-effective tools for biogeochemical monitoring, enabling studies of the ocean sulfur cycle. The findings emphasize the growing application of DGTs in marine and coastal water column research.</div></div>","PeriodicalId":18219,"journal":{"name":"Marine Chemistry","volume":"271 ","pages":"Article 104521"},"PeriodicalIF":3.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917536","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 role of tidal creeks in carbon processing and export to the freshwater tidal zone at the land-estuary boundary of tropical mangrove estuaries","authors":"Claris N. Sunjo ,&nbsp;Eliot A. Atekwana ,&nbsp;Hendratta N. Ali ,&nbsp;Henry M. Agbogun ,&nbsp;Isaac K. Njilah","doi":"10.1016/j.marchem.2025.104520","DOIUrl":"10.1016/j.marchem.2025.104520","url":null,"abstract":"<div><div>Tidal creeks are conduits for tide-driven processing and exchange of water and dissolved inorganic carbon (DIC) between the open estuary and mangrove forests. Yet, the sources of DIC, and the role of tidal creeks in the cycling of DIC and its transport to the open water of mangrove estuaries is poorly understood. This study was conducted in a tidal creek in the freshwater tidal zone at the land-estuary boundary of a tropical mangrove estuary. We made 177 measurements of salinity and 80 measurements of geogenic solutes (silica, Ca, Mg), DIC components (partial pressure of CO₂ (pCO₂), alkalinity and total DIC) and stable isotopes of water (δ¹⁸O and δD) and DIC (δ¹³C_DIC). We aimed to determine the sources and the timing of water input into the tidal creek, how the different water sources control input of DIC, and how DIC is cycled through semidiurnal mixed tides and over a diel cycle. The salinity-δ¹⁸O relationship indicates two sources of water, while the relationships for salinity-DO, salinity-solute, and salinity-DIC implicated submarine groundwater discharge (SGD) as the source providing the DIC processed and transported to the open estuary. Normalized water level vs. salinity reveals that SGD sourced DIC dominates the water column during tidal ebbing and halfway through tidal flooding. In contrast, freshwater from the open estuary mainly dilutes the solutes and DIC from halfway during tidal flooding to peak high tide. The photocycle, heterotrophic and autotrophic processes are unable to explain the more than 5 times greater than atmospheric pCO₂ recorded during the daytime and at low tide. These findings demonstrate that SGD is a significant DIC source in tidal creeks at the land-estuary transition zone which indicate the important role of SGD in the cycling of carbon in the freshwater tidal zones of mangrove estuaries.</div></div>","PeriodicalId":18219,"journal":{"name":"Marine Chemistry","volume":"270 ","pages":"Article 104520"},"PeriodicalIF":3.0,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143863748","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":"Drivers of dissolved organic matter transport in the Guadalquivir estuary (SW, Spain)","authors":"J. Sánchez-Rodríguez ,&nbsp;V. Amaral ,&nbsp;S. Sirviente ,&nbsp;A. Sierra ,&nbsp;M. Bruno ,&nbsp;J. Forja ,&nbsp;T. Ortega","doi":"10.1016/j.marchem.2025.104518","DOIUrl":"10.1016/j.marchem.2025.104518","url":null,"abstract":"<div><div>The Guadalquivir Estuary is the largest in the southwest Iberian Peninsula and is influenced by various anthropic activities, such as damming and rice farming, which regulate river flow and provide lateral inputs to the system. Despite its role as a major source of freshwater and dissolved organic matter (DOM) to the Gulf of Cadiz, there has been limited research on the seasonal distribution of DOM and dissolved organic carbon (DOC) export. This study chemically characterizes DOM using its optical properties along the salinity gradient and during tidal sampling cycles conducted from 2018 to 2022, improving the understanding of DOM dynamics in the estuary. Results show that the DOM in the estuary is predominantly allochthonous, with humic-like components accounting for 85.8 ± 5.8 % of fluorescent DOM (FDOM), while protein-like components, associated with autochthonous processes, account for only 14.2 ± 5.9 %. Mixing and biogeochemical reactivity are the main processes controlling DOM distribution, with mixing being the most significant. Lateral inputs from marshes and rice crops play an important role, particularly in the intermediate zone. Autochthonous DOM is more prominent during the dry season, especially in Summer. The estuary exports 5.8 g C m⁻² yr⁻¹ of DOC, along with substantial amounts of humic-like and protein-like FDOM, especially during extreme rainfall events that increase river flow, and therefore, discharge. DOC transport from the Guadalquivir Estuary is low if we consider the dimensions of its watershed area, highlighting the impact of damming on DOC transport.</div></div>","PeriodicalId":18219,"journal":{"name":"Marine Chemistry","volume":"270 ","pages":"Article 104518"},"PeriodicalIF":3.0,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828860","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}