Oceanology最新文献_第10页

Numerical Modeling of Tidal Phenomena of Penzhina Bay 笔架山湾潮汐现象的数值模拟

IF 1 4区地球科学

Oceanology Pub Date : 2024-01-08 DOI: 10.1134/s0001437023060140

D. R. Shpachuk, O. V. Sokolov, A. N. Bugaets

{"title":"Numerical Modeling of Tidal Phenomena of Penzhina Bay","authors":"D. R. Shpachuk, O. V. Sokolov, A. N. Bugaets","doi":"10.1134/s0001437023060140","DOIUrl":"https://doi.org/10.1134/s0001437023060140","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In this study, the <i>Delft3D-Flow</i> hydrodynamic model was used to determine the characteristics of the main tidal waves and currents in Penzhina Bay (Sea of Okhotsk, Russia). The initial and boundary conditions are set according to the TPXO9 model data, and the salinity and water temperature for each model layer are set based on reanalysis data of the HYCOM ocean general circulation model, with a time step of 3 h. The European Center for Medium-Range Weather Forecasts (ECMWF) ERA-5 reanalysis was used as meteoforcing. Modeling was performed for the ice-free period from May to September 2005. Maps of cotidal lines, tidal ellipses, and reversibility coefficients for the main tidal waves were constructed: semidiurnal wave M2 and diurnal wave K1. The model was verified by comparing the published and calculated harmonic components for nine sea level monitoring points located in Penzhina Bay. Conformance evaluation generally shows a high degree of consistency between the model and reference data. The values of the determination coefficient <i>R</i><sup>2</sup> between the series formed by the model and published harmonic components range from 0.96 to 0.99. According to the magnitude of relative errors, the modeling results are divided into two consistency categories: high (1.48–2.14%) and satisfactory (2.93–4.27%). Spatial distribution patterns for the values of relative errors were not found. A certain inconsistency in the results is presumably due to the time discretization of the observation time support and the short sea level monitoring data series used to calculate the published harmonic components for Penzhina Bay.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139398547","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

Organic Matter in the Ocean: Indicators of Biogeochemical Processes 海洋中的有机物质：生物地球化学过程的指标

IF 1 4区地球科学

Oceanology Pub Date : 2023-12-01 DOI: 10.1134/s0001437023070159

引用次数: 0

Study of Abiotic Factors Controlling Marine Ecosystem Dynamics and Formation of Anomalous Conditions in Coastal Waters of the Far East in the 80th Cruise of the R/V Professor Gagarinskiy 在 "加加林斯基教授号 "考察船第 80 次航行中研究控制远东沿海水域海洋生态系统动态和异常情况形成的非生物因素

IF 1 4区地球科学

Oceanology Pub Date : 2023-12-01 DOI: 10.1134/s0001437023060085

{"title":"Study of Abiotic Factors Controlling Marine Ecosystem Dynamics and Formation of Anomalous Conditions in Coastal Waters of the Far East in the 80th Cruise of the R/V Professor Gagarinskiy","authors":"","doi":"10.1134/s0001437023060085","DOIUrl":"https://doi.org/10.1134/s0001437023060085","url":null,"abstract":"<span> <h3>Abstract</h3> <p>On cruise 80 of the R/V <em>Professor Gagarinskiy</em> from June 15 to July 18, 2022, integrated hydrographic and hydrochemical studies were carried out in Avachinskiy Bay of the Kamchatka Peninsula, on the northeastern shelf of Sakhalin Island, and in Peter the Great Bay to assess current environmental risks in the coastal zone of key areas of Russia’s Far Eastern seas and, in particular, to study possible abiotic factors that caused the mass mortality of marine organisms in Kamchatka in fall 2020. Comprehensive observations were performed, including CTD, hydrochemical water sampling, moorings, and plankton and bottom sediment sampling. An increased nutrient content was found, both in subsurface and intermediate Pacific waters, in comparison with 1990s–2000s data. Intensive snowmelt on adjacent mountain slopes during the survey period showed the significant impact of continental runoff on the hydrochemical characteristics of Avachinskiy Bay waters, causing decreased salinity and significantly increased concentrations of nutrients and chlorophyll <em>a</em> in the coastal zone. The dynamics of mesoscale eddies ensures transport of coastal waters to the ocean over a distance of more than 100 nautical miles. The results suggest that the catastrophic phenomenon off Kamchatka, associated with anomalous harmful algae blooms, is due to conjugate biogeochemical and hydrographic factors: river runoff and intrusion of deep waters on the shelf caused by coastal wind and dynamic upwelling during the period of maximum warming and eutrophication of subarctic Pacific waters, as well as the orographic and topographic features of Avachinskiy Bay.</p> </span>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139398380","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

Bottom Relief and Magnetic Anomaly of the Ninetyeast Ridge Near 5° 九东海脊 5°附近的海底地形和磁异常

IF 1 4区地球科学

Oceanology Pub Date : 2023-12-01 DOI: 10.1134/s0001437023060073

{"title":"Bottom Relief and Magnetic Anomaly of the Ninetyeast Ridge Near 5°","authors":"","doi":"10.1134/s0001437023060073","DOIUrl":"https://doi.org/10.1134/s0001437023060073","url":null,"abstract":"<span> <h3>Abstract</h3> <p>The geophysical survey on cruise 42 of the R/V <em>Akademik Boris Petrov</em> (2017) in the survey area near site 758 ODP significantly refined knowscarp about the bottom topography of the northern segment of the Ninetyeast Ridge. It is crossed by E–W transversal linear troughs, which are apparently young tectonic fractures. The morphology of the narrow elevated block in the central part of the deep depression between neighboring large volcanic edifices has been characterized in detail. In addition to linear tectonic structures, the main features of this block are two volcanic seamounts. A detailed magnetic survey in this area identified for the first time the nature of sources of magnetic anomalies on the Ninetyeast Ridge. Intense local magnetic anomalies have been observed here, both confined to local structures of the bottom and basement relief, and clearly unrelated to them. These anomalies have a complex interfering nature caused by the superposition of fields from sources separated by magnetization, spatial position, and age. According to the results of paleomagnetic analysis of the anomalies, the age of the structures here is very wide: the youngest features formed about 20 Ma ago, and the oldest, over 80 Ma ago.</p> </span>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139398379","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

Aspects of the Towed Underwater Vehicle “Videomodule”: Utilization for Surveying Underwater Objects and Benthic Fauna 拖曳式水下航行器“视频模块”的各个方面:用于测量水下物体和底栖动物

4区地球科学

Oceanology Pub Date : 2023-10-01 DOI: 10.1134/s0001437023050028

I. M. Anisimov, A. K. Zalota, A. V. Lesin, V. O. Muravya

引用次数: 0

Agent-Based Model of Diatom Population Dynamics in Marginal Arctic Seas in Summer 基于agent的北极边缘海域夏季硅藻种群动态模型

4区地球科学

Oceanology Pub Date : 2023-10-01 DOI: 10.1134/s0001437023050041

P. V. Fursova, G. Yu. Riznichenko, I. V. Konyukhov, S. I. Pogosyan

引用次数: 0

Reduced Sulfur Compounds in Bottom Sediments of Lakes at Different Stages of Separation from Kandalaksha Bay of the White Sea (Meromictic Lake Trekhtsvetnoe) 白海Kandalaksha湾不同分离阶段湖泊底部沉积物中硫化物的还原