Oceanology最新文献_第7页

Investigation of the Relationships between the Parameters of Lidar Echo Signals and Hydrooptical Characteristics in the Western Kara Sea 西卡拉海激光雷达回波信号参数与水文光学特征之间关系的研究

IF 1 4区地球科学

Oceanology Pub Date : 2024-03-01 DOI: 10.1134/s0001437023070044

V. A. Glukhov, Yu. A. Goldin, O. V. Glitko, D. I. Glukhovets, E. A. Aglova, M. A. Rodionov

引用次数: 0

Methods of Identifying Atmospheric Mesoscale Coherent Structures Over the North Atlantic 北大西洋上空大气中尺度相干结构的识别方法

IF 1 4区地球科学

Oceanology Pub Date : 2024-03-01 DOI: 10.1134/s000143702307007x

V. S. Koshkina, A. V. Gavrikov, S. K. Gulev

{"title":"Methods of Identifying Atmospheric Mesoscale Coherent Structures Over the North Atlantic","authors":"V. S. Koshkina, A. V. Gavrikov, S. K. Gulev","doi":"10.1134/s000143702307007x","DOIUrl":"https://doi.org/10.1134/s000143702307007x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>Coherent structures (CSs), which are the most often understood as time-stable vortices, play an important role in the Earth’s climate system, since they make a significant contribution to the processes of momentum and heat and mass transfer of any fluid medium, including the atmosphere and the ocean. This is true for all scales of motion, but is particularly important for more chaotic mesoscale processes. A reliable methodology for identifying mesoscale vortices can potentially stimulate the development of a deterministic climatology of mesoscale processes. The main difficulty in developing this direction is the absence of a rigorously mathematical definition of a vortex, which makes it impossible to automatically search for CSs in spatial data. At the same time, the increase in the spatial resolution of numerical models makes this problem increasingly urgent. Some developments in this direction have been carried out in the field of small-scale turbulence: a number of criteria have been developed that allow for the identification of vortices with varying degrees of reliability. In this paper, the applicability of the three most popular criteria for CS identification in significantly larger-scale geophysical data is studied.","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"91 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140882293","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

Comparative Analysis of Jet Detection Methods on the Basis of Satellite Altimetry Data by Example of the Antarctic Circumpolar Current Sector to the South of Africa 以非洲南部的南极环极流段为例，比较分析基于卫星高度测量数据的喷流探测方法

IF 1 4区地球科学

Oceanology Pub Date : 2024-03-01 DOI: 10.1134/s0001437023070202

R. Yu. Tarakanov

{"title":"Comparative Analysis of Jet Detection Methods on the Basis of Satellite Altimetry Data by Example of the Antarctic Circumpolar Current Sector to the South of Africa","authors":"R. Yu. Tarakanov","doi":"10.1134/s0001437023070202","DOIUrl":"https://doi.org/10.1134/s0001437023070202","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000Abstract—</h3>For the period of satellite altimetry observation 1993–2018, a comparison was made of estimates of the linear meridional shifts of the jet structure and variations in current intensity in the sector of the Antarctic Circumpolar Current (ACC) south of Africa (10° E–25° W), obtained on the basis of the parameters derived from the module of the absolute dynamic topography (ADT) gradient (left| {nabla zeta } right|): directly (left| {nabla zeta } right|), module of the velocity of geostrophic current |u| on the ocean surface, half of square of the ADT gradient (frac{1}{2}{{left| {nabla zeta } right|}^{2}}), and specific kinetic energy (frac{1}{2}{{u}^{2}}). The analysis was carried out by a method developed earlier and refined in this paper using linear regression analysis. It is shown that qualitatively the characters of the meridional shifts (displacement of the curves of these parameters averaged over latitude and for each year) in latitude and the corresponding current intensity variations (i.e., variations in the parameters themselves) over 26-year observations, when calculated through each of the four parameters, turned out to be similar. The same similarity was obtained from the calculations with respect to the ADT scale. Meanwhile, the quantitative differences between calculations for different pairs of parameters can be significant even in the (left| u right|) and (left| {nabla zeta } right|) pair. In quantitative terms, the absolute values of shifts of the jet structure and variations in the intensity of currents in the ACC band in the studied sector of the Southern Ocean generally increase from those linearly dependent on the ADT gradient module to quadratically dependent ones.","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"3 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140882086","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

Extension of the Ice-Free Period in the Laptev Sea According to Remote Sensing Data 遥感数据显示拉普捷夫海无冰期延长

IF 1 4区地球科学

Oceanology Pub Date : 2024-03-01 DOI: 10.1134/s0001437023070184

P. A. Shabanov, A. V. Baranskaya

引用次数: 0

Organochlorine Pollutants in Components of the Black Sea Coastal Areas Ecosystem of Crimea from 2010 to 2022 2010 至 2022 年克里米亚黑海沿海地区生态系统各组成部分中的有机氯污染物

IF 1 4区地球科学

Oceanology Pub Date : 2024-03-01 DOI: 10.1134/s0001437023070093

L. V. Malakhova, V. V. Voitsekhovskaia, T. V. Malakhova

{"title":"Organochlorine Pollutants in Components of the Black Sea Coastal Areas Ecosystem of Crimea from 2010 to 2022","authors":"L. V. Malakhova, V. V. Voitsekhovskaia, T. V. Malakhova","doi":"10.1134/s0001437023070093","DOIUrl":"https://doi.org/10.1134/s0001437023070093","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000Abstract—</h3>From 2010 to 2022, the summed concentrations of six indicator polychlorinated biphenyls (∑6PCB) and DDT with metabolites DDE and DDD (∑DDT) in the surface layer of the coastal Black Sea areas of Crimea varied from 0.05 to 34.9 and from 0.01 to 7.44 ng/L, respectively. The maximum concentrations of both groups of compounds were found during spring seasons. With the total variability in the ∑DDT content in water being significant, their average concentration tended to decrease in the study period. For PCBs, this trend was not detected. The ∑DDT concentration in mesozooplankton in the studied water areas in 2016, 2017, and 2019 reached 34.3; ∑6PCB, 475 ng/g dry weight. A positive correlation between the ∑DDT concentration in mesozooplankton and water samples (R 2 = 0.77) and the lack of such correlation for ∑PCB (R 2 = 0.03) was revealed. It was determined that the accumulation of ∑PCB and ∑DDT in mesozooplankton was directly correlated with the total lipid content in organisms. In the surface layer of sediments in open areas of the Black Sea water area of Crimea, the content of PCB congeners 101, 138, 153, and 180 was the same in 2016 and 2019, which indicates stabilization of the technogenic load on the studied water areas.","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"6 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140881850","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

Influence of Hydrometeorological Conditions on the Plankton Distribution in the Estuary of the Pregolya River and the Coastal Part of the Baltic Sea 水文气象条件对普雷戈利亚河口和波罗的海沿海地区浮游生物分布的影响

IF 1 4区地球科学

Oceanology Pub Date : 2024-03-01 DOI: 10.1134/s0001437023070068

K. D. Korobchenkova, S. V. Aleksandrov, A. S. Semenova, Zh. I. Stont, M. O. Ulyanova

{"title":"Influence of Hydrometeorological Conditions on the Plankton Distribution in the Estuary of the Pregolya River and the Coastal Part of the Baltic Sea","authors":"K. D. Korobchenkova, S. V. Aleksandrov, A. S. Semenova, Zh. I. Stont, M. O. Ulyanova","doi":"10.1134/s0001437023070068","DOIUrl":"https://doi.org/10.1134/s0001437023070068","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>The patterns of changes in the composition and quantity of zooplankton and concentration of chlorophyll a in the estuary of the Pregolya River and adjacent waters of the Baltic Sea are considered depending on hydrological and meteorological conditions in 2021–2022. Three zones of the estuary were identified: estuarine, mixing, and marine. In the water mixing zone, there are salinity gradients, the position of which is influenced by wind forcing and river discharge. The largest concentration of chlorophyll a was noted in the estuarine zone and at the boundary of the water mixing zone, where the flow of nutrients from the drainage area is most noticeable. The removal of water from the lagoon affects the concentration of chlorophyll a and the composition of zooplankton. The estuarine zone is characterized by the highest level of eutrophication, where it approaches the threshold of hypertrophy; in the marine zone, the concentrations of chlorophyll a corresponded to eutrophic water. Depending on the inflow–outflow phenomena, the proportion of zooplankton species differs in relation to changes in salinity, and there is a sharp increase in deaths of organisms of species not adapted to a given salinity.","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"18 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140882297","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

Zooplankton of the Eastern Kara Sea: Response to a Short Ice-Free Period 东喀拉海浮游动物：对短暂无冰期的反应

IF 1 4区地球科学

Oceanology Pub Date : 2024-03-01 DOI: 10.1134/s0001437023070020

A. V. Drits, A. F. Pasternak, E. G. Arashkevich, A. B. Amelina, T. A. Shchuka, M. V. Flint

{"title":"Zooplankton of the Eastern Kara Sea: Response to a Short Ice-Free Period","authors":"A. V. Drits, A. F. Pasternak, E. G. Arashkevich, A. B. Amelina, T. A. Shchuka, M. V. Flint","doi":"10.1134/s0001437023070020","DOIUrl":"https://doi.org/10.1134/s0001437023070020","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000Abstract—</h3>A characteristic feature of the eastern Kara Sea, which is separated from its central part by the shallow Central Kara Rise, is a later ice breakup, a shorter ice-free period, and lower water temperature. Zooplankton in this part of the sea is virtually unstudied. The first data on the composition, spatial distribution of zooplankton, age structure and feeding of the dominant species, and their grazing impact on phytoplankton were obtained in the cruise 125 of the R/V Professor Shtokman (September 2013) and cruise 63 of the R/V Akademik Mstislav Keldysh (September 2015) to the eastern Kara Sea. 2015 was a typical year in terms of the ice regime for this region, while in 2013, seasonal ice coverage lasted longer than usual. Zooplankton biomass (17–112 mg dry weight m–3), to which copepods Calanus glacialis contributed the main portion, were close to the values in the central Kara Sea in September. The seasonal development of the C. glacialis population began much later than in the central Kara Sea, but development of Metridia longa was not influenced by the specifics of the ice regime and hydrophysical conditions in the eastern Kara Sea. The interannual differences in the timing of ice retreat had almost no effect on the zooplankton abundance, seasonal development of the dominant copepod populations, feeding activity, and grazing impact on phytoplankton.","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"4 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140019782","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

Sedimentation Processes and the Holocene Evolution of the Indigirka Paleovalley (Coastal Shelf Area of the East Siberian Sea) 沉积过程与因迪吉尔卡古河谷（东西伯利亚海沿海大陆架地区）全新世的演变

IF 1 4区地球科学

Oceanology Pub Date : 2024-03-01 DOI: 10.1134/s0001437023070160

D. V. Ryabchuk, E. E. Taldenkova, A. Yu. Sergeev, V. A. Zhamoida, L. M. Budanov, D. V. Prishchepenko, E. S. Nosevich, Ya. E. Terekhina, L. D. Bashirova, E. P. Ponomarenko, I. A. Neevin, A. V. Chekulaev, A. G. Grigoriev

引用次数: 0

Migration and Distribution Fluxes of Plutonium Radioisotopes in Coastal Semiclosed Marine Areas 沿海半封闭海域钚放射性同位素的迁移和分布通量

IF 1 4区地球科学

Oceanology Pub Date : 2024-03-01 DOI: 10.1134/s0001437023070135

A. A. Paraskiv, N. N. Tereshchenko, V. Yu. Proskurnin, O. D. Chuzhikova-Proskurnina, M. O. Vakhrushev

{"title":"Migration and Distribution Fluxes of Plutonium Radioisotopes in Coastal Semiclosed Marine Areas","authors":"A. A. Paraskiv, N. N. Tereshchenko, V. Yu. Proskurnin, O. D. Chuzhikova-Proskurnina, M. O. Vakhrushev","doi":"10.1134/s0001437023070135","DOIUrl":"https://doi.org/10.1134/s0001437023070135","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>The article presents the results of a quantitative determination of the migration and distribution fluxes of plutonium radioisotopes 239 + 240Pu in coastal semiclosed marine ecosystems from a case study example of Sevastopol Bay (Black Sea) to assess the self-purification of water masses from 239 + 240Pu. The assessment was based on a study of the current (2018–2021) levels of the activity concentration of 239 + 240Pu in water, bottom sediments, perennial brown macroalgae, and benthic fish. It has been found that the main 239 + 240Pu removal flux (more than 93% of the total flux), which determines the self-purification of water masses with respect to 239 + 240Pu in coastal marine areas is the sediment flux of suspended particle matter, which causes redistribution of 239 + 240Pu into bottom sediments. 239 + 240Pu migration to neighboring water areas due to hydrological processes is insignificant, as well as the decrease in 239 + 240Pu in the ecosystem due to radioactive decay. In total, these processes accounted for less than 1% of the total flux. The interaction of 239 + 240Pu with macrobiota accounted for almost 6%, of which more than 5% was provided by macrophytes.","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"153 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140882085","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

Seasonal Variability of Wind Wave Spectra in the Black Sea and Sea of Azov 黑海和亚速海风浪频谱的季节变异性

IF 1 4区地球科学

Oceanology Pub Date : 2024-03-01 DOI: 10.1134/s0001437023070172

A. D. Rybalko, S. A. Myslenkov, V. S. Arkhipkin

{"title":"Seasonal Variability of Wind Wave Spectra in the Black Sea and Sea of Azov","authors":"A. D. Rybalko, S. A. Myslenkov, V. S. Arkhipkin","doi":"10.1134/s0001437023070172","DOIUrl":"https://doi.org/10.1134/s0001437023070172","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>The spatial and seasonal variability of the wind wave frequency spectra in the Black Sea and Sea of Azov is studied based on the example of the 2020. Frequency spectra were computed with the WAVEWATCH III model on an irregular computational grid. To describe the variability of the spectra, a classification was developed. Twenty-two classes were found using cluster analysis. The classes differ in peak frequency, spectral density value, and shape. Each spectrum from the entire database was assigned to one of these classes. It was determined that the class with the less spectral density prevails in all seasons in both seas. The second most frequently occurring class has spatial and seasonal variability. The Sea of Azov is characterized by classes with a frequency of the main peak higher than in the Black Sea. A greater number of classes are distinguished in the open parts of the seas than in the coastal zone. Additionally, the percentage of spectra with two or more peaks was calculated. The percentage of such classes in the Black Sea does not exceed 1.5% on average, and the maximum is observed in winter (up to 19%) in the southeastern part. In the Sea of Azov, there are no two-peak spectra that meet the selected criteria.","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":"12 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140882274","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