Oceanology最新文献_第4页

Environmental Studies of the Baltic Sea on Cruise 53 of the R/V Akademik Boris Petrov Akademik Boris Petrov 号考察船第 53 次航行对波罗的海环境的研究

IF 1 4区地球科学

Oceanology Pub Date : 2024-07-02 DOI: 10.1134/s0001437024700152

D. V. Dorokhov, E. V. Dorokhova, A. A. Kondrashov, Yu. Yu. Polunina, A. Yu. Sergeev, I. Yu. Dudkov

引用次数: 0

Geological Structure and Prospects of the Oil-And-Gas-Bearing Mozambique Continental Margin 莫桑比克含油气大陆边缘的地质结构和前景

IF 1 4区地球科学

Oceanology Pub Date : 2024-07-02 DOI: 10.1134/s0001437024700139

A. Zabanbark, L. I. Lobkovsky

{"title":"Geological Structure and Prospects of the Oil-And-Gas-Bearing Mozambique Continental Margin","authors":"A. Zabanbark, L. I. Lobkovsky","doi":"10.1134/s0001437024700139","DOIUrl":"https://doi.org/10.1134/s0001437024700139","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>The principal basins on the Mozambique continental margin are the Mozambique and Rovuma, on the passive continental margin with complex tectonic history, following after the East African Rift System in the Triassic. Although the first gas fields in the coastal zone of the Indian Ocean in southeast Mozambique are appeared yet in the 1960s, only in 2010, did Mozambique achieve a new status as a major world hydrocarbon player—with the discovery of a number of large gas fields in the northeast of the country, in deep-water regions of the Indian Ocean, and in the Rovuma Basin. More than 20 recently discovered gas fields are located in deep-water regions and on the continental slope of the Indian Ocean at depths of 468–2610 m. It is noteworthy that the pays of the same age, the deeper they are buried beneath the water column, the greater their volume of hydrocarbon reserves. A similar trend may help in the case of targeted oil and gas exploration. The prospects of liquid hydrocarbon discoveries are possible in the Madagascar channel behind the Davie Ridge and in deep-water parts on the slopes of the Mozambique continental margin.","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"176 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141520538","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

Bacterioplankton in the Western Kara Sea 西喀拉海的浮游细菌

IF 1 4区地球科学

Oceanology Pub Date : 2024-05-14 DOI: 10.1134/s0001437024020103

N. D. Romanova, M. A. Boltenkova, E. M. Bezzubova

{"title":"Bacterioplankton in the Western Kara Sea","authors":"N. D. Romanova, M. A. Boltenkova, E. M. Bezzubova","doi":"10.1134/s0001437024020103","DOIUrl":"https://doi.org/10.1134/s0001437024020103","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000Abstract—</h3>This paper reports data on the structural and production characteristics of bacterioplankton in the western Kara Sea at the beginning and middle of summer. On the slope of the St. Anna Trough, the average prokaryote abundance in the water column was 594–708 × 103 cells mL−1 (26.4–36.5 mgC m–3) in June and 247–517 × 103 cells mL−1 (12–28 mgC m–3) at the beginning of August. On the transect along the Novaya Zemlya archipelago, the average bacterioplankton abundance in the water column was 186–554 × 103 cells mL−1 (8.5–30 mgC m–3) within a week after the seasonal ice retreat and 169–443 × 103 cells mL−1 (8–21 mgC m–3) in midsummer. The specific bacterial growth rate did not exceed 1.28 day–1; high values were observed in the upper warm water layer, above the halocline, and also in near-bottom water. At the beginning of summer, the bacterioplankton production tended to decrease in the northeast direction. The prokaryote abundance distribution was associated with water temperature and oxygen saturation possibly as an indirect indicator of the past phytoplankton bloom.","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"10 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140931019","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

State and Forecast of Development of the Shallow Sandy Coast of a Tidal Sea (A Case Study of Madagascar) 潮汐海浅沙质海岸的发展状况与预测（马达加斯加案例研究）

IF 1 4区地球科学

Oceanology Pub Date : 2024-05-14 DOI: 10.1134/s0001437024020061

N. N. Dunaev, I. O. Leont’yev, T. Yu. Repkina

引用次数: 0

IF 1 4区地球科学

Oceanology Pub Date : 2024-05-14 DOI: 10.1134/s0001437024020140

V. V. Zhmur

{"title":"On the Similarity of Quasi-Geostrophic Vortices Against the Background of Large-Scale Barotropic Currents","authors":"V. V. Zhmur","doi":"10.1134/s0001437024020140","DOIUrl":"https://doi.org/10.1134/s0001437024020140","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>The paper proposes a theory of similarity of quasi-geostrophic vortices against the background of large-scale flows. This information is useful when planning laboratory and numerical experiments to study mesoscale and submesoscale vortex dynamics of vortices interacting with currents. Special attention is paid to studying geometric similarity of phenomena. It is revealed that the complete set of dimensionless similarity numbers of baroclinic vortices includes four dimensionless parameters: the dimensionless intensity of the vortex, the geometric similarity of the background flow (the ratio of the relative vorticity to the deformation coefficient of the background flow), the coefficient of horizontal stretching of the vortex core, and the coefficient of vertical oblateness of the vortex core coinciding with the Burger number. To describe the similarity of barotropic vortices against the background of barotropic flows, the number of necessary dimensionless parameters is reduced by one number: the coefficient of vertical oblateness of the vortex core is eliminated from consideration. When studying axisymmetric vortices or vortex structures close to axisymmetric, another geometric parameter of the vortex is eliminated from consideration—the coefficient of horizontal stretching of the vortex core. As a result, the maximum possible set of similarity parameters includes four dimensionless numbers, and the minimum is two.","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"45 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140931161","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

Relationship between Respiration Rate and Body Weight in Arctic Copepods at Subzero Temperature 零度以下北极桡足类呼吸速率与体重的关系

IF 1 4区地球科学

Oceanology Pub Date : 2024-05-14 DOI: 10.1134/s0001437024020024

E. G. Arashkevich, A. V. Drits, A. F. Pasternak, S. E. Frenkel, V. A. Karmanov

{"title":"Relationship between Respiration Rate and Body Weight in Arctic Copepods at Subzero Temperature","authors":"E. G. Arashkevich, A. V. Drits, A. F. Pasternak, S. E. Frenkel, V. A. Karmanov","doi":"10.1134/s0001437024020024","DOIUrl":"https://doi.org/10.1134/s0001437024020024","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>The dependence of the respiration rate (R) on an animal’s weight (W) is described by the equation R = aW b, where the exponential coefficient b is usually taken equal to 3/4. However, several authors have indicated that the value of coefficient b may vary with temperature changes, as well as during ontogeny. In Arctic seas, copepods spend most of their lives at temperatures below or close to zero. Meanwhile, there are very few respiration rate measurements at temperature ≤ 0°C, which does not allow us to estimate the value of coefficient b at subzero temperature. The study was carried out on three cruises of the R/V Akademik Mstislav Keldysh in the Siberian Arctic seas in 2018–2020. Copepods caught from the sea were adapted to the experimental temperature and placed in tightly capped vials filled with filtered seawater for 24 h. The oxygen concentration was measured with a fiber-optic oxygen probe. The results of 120 respiration rate measurements and 111 body carbon measurements in five species of copepods at a temperature of –1.5°C are presented. The obtained relationship between body carbon content (W) and prosome length (L) is described by the equation W = 6.982L3.221, and the dependence of respiration on body weight is described by the equation R = 0.077W 0.753. No effect of subzero temperature on coefficient b was revealed. The parameters of regression R(W) did not change with the ontogenetic development of Calanus glacialis.","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"12 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140931154","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

Grain Size Distribution, Organic Carbon, and Geochemical Markers in the Surface Layer of Bottom Sediments in the Northeastern Kara Sea 喀拉海东北部海底沉积物表层的粒度分布、有机碳和地球化学标志物

IF 1 4区地球科学

Oceanology Pub Date : 2024-05-14 DOI: 10.1134/s0001437024020127

E. A. Streltsova, N. A. Belyaev, V. Y. Fedulov, E. M. Pushkareva

引用次数: 0

Observations of Tsunami Waves on the Pacific Coast of Russia Originating from the Hunga Tonga–Hunga Ha’apai Volcanic Eruption on January 15, 2022 2022 年 1 月 15 日洪加汤加-洪加下阿帕伊火山爆发引发的俄罗斯太平洋沿岸海啸波观测结果

IF 1 4区地球科学

Oceanology Pub Date : 2024-05-14 DOI: 10.1134/s0001437024020097

I. P. Medvedev, T. N. Ivelskaya, A. B. Rabinovich, E. S. Tsukanova, A. Yu. Medvedeva

{"title":"Observations of Tsunami Waves on the Pacific Coast of Russia Originating from the Hunga Tonga–Hunga Ha’apai Volcanic Eruption on January 15, 2022","authors":"I. P. Medvedev, T. N. Ivelskaya, A. B. Rabinovich, E. S. Tsukanova, A. Yu. Medvedeva","doi":"10.1134/s0001437024020097","DOIUrl":"https://doi.org/10.1134/s0001437024020097","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>The Hunga Tonga–Hunga Ha’apai volcanic eruption on January 15, 2022 generated a tsunami that affected the entire Pacific Ocean. Tsunami waves from the event have been generated both by incoming waves from the source area with a long-wave speed in the ocean of ~200–220 m/s, and by an atmospheric wave propagating at a sound speed of ~315 m/s. Such a dual source mechanism created a serious problem and was a real challenge for the Pacific tsunami warning services. The work of the Russian Tsunami Warning Service (Yuzhno-Sakhalinsk) during this event is considered in detail. The tsunami was clearly recorded on the coasts of the Northwest Pacific and in the adjacent marginal seas, including the Sea of Japan, the Sea of Okhotsk, and the Bering Sea. We examined high-resolution records (1-min sampling) of 20 tide gauges and 8 air pressure stations in this region for the period of January 14–17, 2022. On the Russian coast, the highest waves, with a trough-to-crest wave height of 1.3 m, were recorded at Malokurilskoe (Shikotan Island) and Vodopadnaya (southeastern coast of Kamchatka). Using numerical simulation and data analysis methods, we were able to separate oceanic “gravity” tsunami waves from propagating atmospheric pressure waves. In general, we found that on the outer (oceanic) coasts and southern coast of the Sea of Okhotsk, oceanic tsunami waves prevailed, while on the coast of the Sea of Japan, oceanic and atmospheric tsunami waves had similar heights.","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"22 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140931157","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

Geochemical Markers of Organic Matter Transformation in the Eastern Laptev Sea 拉普捷夫海东部有机物质转化的地球化学标记

IF 1 4区地球科学

Oceanology Pub Date : 2024-05-14 DOI: 10.1134/s0001437024020115

N. A. Shulga, E. A. Romankevich, N. V. Vylegzhanina, E. A. Streltsova, V. Yu. Fedulov, A. V. Polyakova

引用次数: 0

Differences in Megabenthos Communities in the Eastern and Western Parts of the Kara Sea Based on Video Observations 基于视频观测的喀拉海东西部大型底栖生物群落差异

IF 1 4区地球科学

Oceanology Pub Date : 2024-05-14 DOI: 10.1134/s0001437024020139

A. A. Udalov, I. M. Anisimov, V. O. Muravya, A. V. Lesin, V. Yu. Kuzmin, A. K. Zalota, M. V. Chikina

{"title":"Differences in Megabenthos Communities in the Eastern and Western Parts of the Kara Sea Based on Video Observations","authors":"A. A. Udalov, I. M. Anisimov, V. O. Muravya, A. V. Lesin, V. Yu. Kuzmin, A. K. Zalota, M. V. Chikina","doi":"10.1134/s0001437024020139","DOIUrl":"https://doi.org/10.1134/s0001437024020139","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>The first quantitative video survey of the benthic megafauna was carried out on a transect in the eastern part of the Kara Sea from the slope of the Voronin Trough to the upper shelf in the depth range from 1680 to 70 metres. The data were obtained using the TUV “Videomodule” during the 89th cruise of the R/V Akademik Mstislav Keldysh in autumn 2022. It was shown that the megabenthos in this area differs significantly from that of the western part of the sea and Blagopoluchiya Bay (Novaya Zemlya). In the eastern part of the Kara Sea, echinoderms dominated, among which ophiuroids were in the first place, whereas in the western part of the sea and the Blagopoluchiya Bay, the key component of the megafauna was the snow crab Chionoecetes opilio. Single adults of Ch. opilio were recorded for the first time at almost all stations in the eastern part of the sea, but, in contrast to the western area, the snow crab has not yet become dominant here and has not influenced the benthic communities.","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"129 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140931020","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