Oceanology最新文献_第6页

Crust and Upper Mantle of the South China Sea (Probabilistic-Deterministic Gravity Model) 南海地壳和上地幔（概率-确定重力模型）

IF 1 4区地球科学

Oceanology Pub Date : 2024-04-22 DOI: 10.1134/s0001437024010090

A. M. Petrischevsky

{"title":"Crust and Upper Mantle of the South China Sea (Probabilistic-Deterministic Gravity Model)","authors":"A. M. Petrischevsky","doi":"10.1134/s0001437024010090","DOIUrl":"https://doi.org/10.1134/s0001437024010090","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Rheological layering of the tectonosphere of the South China Sea (SCS) on the crust—rigid (the depth interval of 5–30 km), viscous subcrustal (the depth interval of 30–70 km), rigid lower lithospheric (50–90 km), astenospheric (80–150 km) and rigid subastenospheric (the depth interval is more than 150 km)—is established. Distributions of the density inhomogeneities related to the main tectonic events in the SCS are caused by the Paleo-Pacific’s convergence, and later, the oceanic Philippine Plate, with the Philippine archipelago and later, with the Asian margin. In this zone, based on density contrast distributions in the tectonosphere, Cenozoic processes of a subduction, stretching, transform shift and structure of the central type of the probable plume nature are traced, which form an evolutionary sequence: back-arc, or paleoceanic spreading → Philippine subduction → NE-stretching with discplacement → formation of a central type of structure, probably with a plume origin. The structures caused by convergence of the Asian continent with the Indo-Australian Plate are isolated from the West Pacific margin, and underthrusting of rigid lithospheric plates from the south under the lithosphere of the marginal sea reflects traces of a more ancient collision of fragments of Gondwana with the Asian continent.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"15 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140799280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of Initial Seismicity for Offshore Platforms: a Case Study of the Pechora Sea 海上平台初始地震评估：佩乔拉海案例研究

IF 1 4区地球科学

Oceanology Pub Date : 2024-04-22 DOI: 10.1134/s0001437024010065

S. A. Kovachev, N. V. Libina

引用次数: 0

Simulation-Based Ecological Risk Assessment of the Black Sea Ecosystem 基于模拟的黑海生态系统生态风险评估

IF 1 4区地球科学

Oceanology Pub Date : 2024-04-22 DOI: 10.1134/s0001437024010119

N. V. Solovjova, I. V. Kovalyova

引用次数: 0

Mineralogy of Quaternary Sediments from the Vema Fracture Zone Valley (Central Atlantic) 维马断裂带河谷（大西洋中部）第四纪沉积物矿物学

IF 1 4区地球科学

Oceanology Pub Date : 2024-04-22 DOI: 10.1134/s0001437023050077

I. O. Murdmaa, O. M. Dara, M. A. Lykova, D. G. Borisov, E. V. Ivanova

{"title":"Mineralogy of Quaternary Sediments from the Vema Fracture Zone Valley (Central Atlantic)","authors":"I. O. Murdmaa, O. M. Dara, M. A. Lykova, D. G. Borisov, E. V. Ivanova","doi":"10.1134/s0001437023050077","DOIUrl":"https://doi.org/10.1134/s0001437023050077","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The content of sediment-forming minerals in two cores from the eastern (ANS45-37) and western (ANS45-48) parts of the valley of the Vema Fracture Zone is studied using semiquantitative XRD analysis of bulk powder sediment samples. The mineral composition of deep-sea sediments from the Amazone Cone is also analyzed for comparison. It appeared that the average composition of the terrigenous component of both cores (according to prevailing quartz, secondary mica, plagioclase and potassium feldspar, as well as smectite, chlorite, kaolinite, illite) is quite similar and approximately corresponds to the composition of sediments from the Amazon Cone. The ratio of four clay minerals suggests supply of terrigenous material to the Amazon and Orinoco due to erosion of the Andes and humid tropical weathering in the lower courses of the rivers with further transport of the suspended load to the ocean. This material was transported to the valley of the Vema Fracture Zone due to interplay between gravitational flows from the South American continental slope and current of Antarctic Bottom Water. In addition, data on biogenic calcite (planktic foraminiferal tests, nannofossils) and opal A (radiolarians, sponge spicules) have been obtained. In the study area, several authigenic (diagenetic) minerals are identified. In particular, siderite and greigite are first found in the sediments from the Vema valley and Amazon Cone, respectively.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"86 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140801652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modern Methods and Technical Instruments of Ecological Monitoring of the Estuaries of Small Rivers 小河河口生态监测的现代方法和技术手段

IF 1 4区地球科学

Oceanology Pub Date : 2024-04-22 DOI: 10.1134/s0001437024010028

D. A. Antonenkov

{"title":"Modern Methods and Technical Instruments of Ecological Monitoring of the Estuaries of Small Rivers","authors":"D. A. Antonenkov","doi":"10.1134/s0001437024010028","DOIUrl":"https://doi.org/10.1134/s0001437024010028","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>At present, river estuaries are constantly being explored; therefore, it is necessary to receive up-to-date information on their actual environmental condition, hydrological regime, and geographical features. Therefore, it is important to develop and improve the methods and technical instruments for monitoring river estuaries. The article presents a developed methodology for integrated research of small-river estuaries using new methods and techniques. The article discusses the experience in using modern domestic devices for solving practical problems of integrated water-environmental monitoring with a case study of expeditionary work in estuaries of the Chernaya River (Crimean Peninsula, Sevastopol). The possibilities of the following technical instruments used are described: The GAP-AK-12R CTD (MHI RAS), the Condor biophysical complex (Aquastandard), and the Garmin echo sounder, which make it possible to obtain field data on turbidity, the concentration of suspended particulate matter, speed and direction of currents, the average size of suspended particles, and salinity and temperature of the aquatic environment. The results of applying a new method for determining the flow velocity and water consumption based on video image processing are presented. Application of the developed methodology makes it possible to obtain the information necessary to analyze the hydrological regime and ecological state of small-river estuaries.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"34 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140801655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Change in the Rock Erosion Rate in the Upper Sublittoral Zone of the Murmansk Coast 摩尔曼斯克海岸上沿岸带岩石侵蚀率的变化

IF 1 4区地球科学

Oceanology Pub Date : 2024-04-22 DOI: 10.1134/s0001437024010077

M. V. Mityaev, M. V. Gerasimova, S. S. Malavenda

{"title":"Change in the Rock Erosion Rate in the Upper Sublittoral Zone of the Murmansk Coast","authors":"M. V. Mityaev, M. V. Gerasimova, S. S. Malavenda","doi":"10.1134/s0001437024010077","DOIUrl":"https://doi.org/10.1134/s0001437024010077","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A five-year observation (2017–2022) of the abrasive erosion of rocks in the littoral and upper sublittoral zone of Dalnezelenetskaya Bay (Murmansk coast) was carried out During this period, a slow rock erosion rate was observed not only in the upper sublittoral zone, but also throughout the coastal littoral zone. It was revealed that the erosion rate of coarse-clastic material in 2017–2022 averaged 15 ± 3 µm g<sup>–1</sup>. The greatest influence on the intensity of erosion was exerted by storms generated by easterly and southeasterly winds 7–12 m/s. It has been established that in 2021–2022, abrasive erosion of rocks in the sublittoral zone of the Murmansk coast intensified. Based on an analysis of hydrological, meteorological, and seismic data, it is suggested that activation of the abrasion process was caused by an increased number of storm periods; perhaps the tectonic activity of disjunctive structures on the coast played an important role in this. The data obtained indicate that changes in the temperature and salinity of the water mass in the bay have no significant effect on the abrasion rate.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"155 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140801784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tectonic Structure and Evolution of the Lithosphere in the Near-Antarctic Part of the South Atlantic 南大西洋近南极地区岩石圈的构造和演变

IF 1 4区地球科学

Oceanology Pub Date : 2024-04-22 DOI: 10.1134/s0001437024010053

E. P. Dubinin, A. V. Kokhan, N. M. Suschevskaya

引用次数: 0

Obtaining Wind Waves Parameters Using Ship Radar 利用船舶雷达获取风浪参数

IF 1 4区地球科学

Oceanology Pub Date : 2024-03-01 DOI: 10.1134/s0001437023070032

E. A. Ezhova, A. V. Gavrikov, V. D. Sharmar, N. D. Tilinina, A. I. Suslov, V. S. Koshkina, M. A. Krinitskiy, V. S. Gladyshev, M. A. Borisov

引用次数: 0

Deck Spectroradiometer for Measuring Remote Sensing Reflectance 用于测量遥感反射率的甲板光谱辐射计

IF 1 4区地球科学

Oceanology Pub Date : 2024-03-01 DOI: 10.1134/s0001437023070147

M. A. Pavlova, D. I. Glukhovets, V. D. Volodin

引用次数: 0

The Atlantic Gateway to the Arctic in the Mirror of the Kola Transect 科拉横断面镜像中的北极大西洋门户

IF 1 4区地球科学

Oceanology Pub Date : 2024-03-01 DOI: 10.1134/s0001437023070123

E. V. Novoselova, T. V. Belonenko, S. M. Gordeeva, M. V. Budyansky

{"title":"The Atlantic Gateway to the Arctic in the Mirror of the Kola Transect","authors":"E. V. Novoselova, T. V. Belonenko, S. M. Gordeeva, M. V. Budyansky","doi":"10.1134/s0001437023070123","DOIUrl":"https://doi.org/10.1134/s0001437023070123","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000<b>Abstract</b>—</h3><p>In situ temperature measurements along the Kola Transect for 1993–2019 are compared to climate indices for the North Atlantic, developed by the authors in earlier works. Five climate indices are considered: PC1, PC2, NAT, NAT1, and NAT2. It is shown that the temperature time series along the Kola Transect correlate well with climate indices PC2, as well as NAT1 and NAT2, which are responsible for warming processes in the cold North European Basin and cooling processes in the warm region south of Iceland. The correlation coefficients reach 0.80. At the same time, there is a low correlation between the temperature along the Kola Transect and the PC1 and NAT indices, which represent the volume flux of water entering the North European Basin from the Atlantic. This implies that the thermal state of the Atlantic waters entering the Barents Sea and the water temperature along the Kola Meridian are determined by the thermal state of the waters rather than the volume flux of Atlantic waters. A high consistency is found between the in situ measurements along the Kola Transect and the corresponding data from the GLORYS12V1 global ocean reanalysis. It is shown that the northern boundary of the Coastal Branch of the Murmansk Current can reach 71.5°–72° N.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"61 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140882302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0