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The Origin of the Snow Crab Chionoecetes opilio in the Kara Sea 卡拉海雪蟹 Chionoecetes opilio 的起源

IF 1 4区地球科学 Q4 OCEANOGRAPHY

Oceanology

Pub Date : 2024-05-14 DOI: 10.1134/s0001437024020085

E. V. Lipukhin, A. K. Zalota, A. V. Mishin, U. V. Simakova

Abstract

Most likely, the alien snow crab Chionoecetes opilio entered the Kara Sea from the Barents Sea, both due to the migration of adults and with currents at the larval stage. Currently, all bottom stages, including mature individuals and a large number of pelagic larvae, are present in the Kara Sea. However, the origin of larvae has not yet been clarified. The larvae hatched in the Kara Sea should be at an earlier stage of development compared with the larvae arrived here from the Barents Sea due to later development of phytoplankton and, accordingly, later hatching. The larvae of the snow crab Chionoecetes opilio and the spider crab Hyas araneus were collected in the central and southwestern Kara Sea in July–early August 2019 by a Bongo zooplankton net with a diameter of 60 cm. It was established that the larvae were unevenly distributed across the Kara Sea. The most populus region was the border with the Barents Sea in the St. Anna Trough (up to 860 ind./m²), and relatively high concentrations of larvae were recorded in the southwestern part, where their abundance at stations varied from 18 to 302 ind./m². In the zone of the Ob–Yenisei plume, crab larvae were absent or their abundance was minimal. Using molecular genetic methods, the species identity of 361 larvae (344 C. opilio and 17 H. araneus) was reliably determined, and measurements of a number of morphological structures were made for 401 larvae. Significant differences in size were found at the zoea II stage between C. opilio and H. araneus. In July 2019, in most of the Kara Sea, in zooplankton samples, crab larvae were represented by zoea I of C. opilio with rare specimens of zoea I of H. araneus of the Kara Sea origin. Only in the southwestern part, at the boundary with the Barents Sea, was the presence of zoea II of C. opilio and H. araneus observed in samples with an increased share of the latter species in catches, which probably originated from the Barents Sea.

摘要外来雪蟹 Chionoecetes opilio 很可能是从巴伦支海进入喀拉海的，这既是由于成蟹的迁移，也是由于幼蟹阶段的洋流。目前，喀拉海存在所有底层阶段，包括成熟个体和大量浮游幼体。不过，幼体的来源尚未明确。与从巴伦支海来到这里的幼体相比，在喀拉海孵化的幼体应该处于较早的发育阶段，因为浮游植物发育较晚，因此孵化也较晚。2019 年 7 月至 8 月初，用直径为 60 厘米的邦戈浮游动物网在喀拉海中部和西南部采集了雪蟹（Chionoecetes opilio）和蜘蛛蟹（Hyas araneus）的幼虫。结果表明，幼虫在喀拉海分布不均。幼虫数量最多的区域是圣安娜海槽与巴伦支海交界处（高达 860 头/平方米），西南部的幼虫浓度相对较高，各站的幼虫数量从 18 头/平方米到 302 头/平方米不等。在奥布-叶尼塞羽流区域，没有蟹幼体或蟹幼体数量极少。利用分子遗传方法，可靠地确定了 361 只幼体（344 只 C. opilio 和 17 只 H. araneus）的物种特征，并对 401 只幼体的一些形态结构进行了测量。发现 C. opilio 和 H. araneus 的幼虫在 zoea II 阶段的体型存在显著差异。2019 年 7 月，在喀拉海的大部分浮游动物样本中，螃蟹幼体以 C. opilio 的 zoea I 为代表，极少有喀拉海 H. araneus 的 zoea I 标本。只有在西南部与巴伦支海交界处的样本中，才观察到 C. opilio 和 H. araneus 的 Zoea II，后者在渔获物中的比例增加，可能来自巴伦支海。

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引用次数: 0

Distribution and Variations of Elemental Sulfur in the Upper Part of the Black Sea Anoxic Water Column 黑海缺氧水柱上部元素硫的分布和变化

IF 1 4区地球科学 Q4 OCEANOGRAPHY

Oceanology

Pub Date : 2024-05-14 DOI: 10.1134/s0001437024020048

A. V. Dubinin, T. P. Demidova, O. A. Ocherednik, L. S. Semilova, M. N. Rimskaya-Korsakova, E. D. Berezhnaya, E. N. Zologina

Abstract

Elemental sulfur and its derivatives, polysulfides, play a key role in hydrogen sulfide oxidation processes in anoxic basins. Having low solubility, elemental sulfur is mainly represented by suspended forms. However, in sulfide waters, it forms highly soluble polysulfides. This article studies elemental sulfur and polysulfides in the upper part of the Black Sea anoxic water column in 2017–2019 and 2022 at stations located on the continental slope off the coast of the Caucasus and Crimea. Sulfur was sampled, filtered, and determined under strictly anoxic conditions in an argon atmosphere. The concentration of elemental sulfur (zero-valent sulfur (ZVS)–elemental sulfur together with polysulfides) increases with depth and hydrogen sulfide content from 0.01 µmol/kg at the redox interface to 0.67 µmol/kg at a depth of 600 m. The elemental sulfur fraction in the composition of ZVS is 23 ± 5%. Based on thermodynamic data, calculation of the polysulfide concentration in equilibrium with suspended sulfur shows that deeper than 20–25 m of the upper boundary of the anoxic zone, their concentration was higher than ZVS and at a depth of 600 m they differed about threefold. The predominance of elemental sulfur over sulfide sulfur in the composition of polysulfides in the anoxic zone at depths of 450 and 600 m may be the reason for the fractionation of its isotopic composition by 2.2‰ with respect to dissolved sulfide sulfur (–41.0‰ VCDT).

摘要元素硫及其衍生物多硫化物在缺氧盆地的硫化氢氧化过程中发挥着关键作用。元素硫的溶解度较低，主要以悬浮形式存在。然而，在硫化物水体中，它会形成高溶解度的多硫化物。本文研究了 2017-2019 年和 2022 年黑海缺氧水体上部的元素硫和多硫化物，研究地点位于高加索和克里米亚沿岸大陆坡上的站点。在氩气环境中的严格缺氧条件下对硫进行采样、过滤和测定。元素硫（零价硫（ZVS）--元素硫和多硫化物）的浓度随深度和硫化氢含量的增加而增加，从氧化还原界面的 0.01 µmol/kg 增加到 600 米深处的 0.67 µmol/kg。根据热力学数据，计算与悬浮硫处于平衡状态的多硫化物浓度表明，在缺氧区上边界 20-25 米深处，它们的浓度高于 ZVS，而在 600 米深处，它们的浓度相差约三倍。在缺氧区 450 米和 600 米深处的多硫化物组成中，元素硫比硫化物硫占优势，这可能是其同位素组成比溶解硫化物硫（-41.0‰ VCDT）分馏 2.2‰的原因。

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引用次数: 0

Assessment of the Influence of Abiotic Factors on the Distribution of Zostera in the Inner Bays of Posyet Bay Based on Numerical Simulation Results 基于数值模拟结果评估非生物因素对波西特湾内湾 Zostera 分布的影响

IF 1 4区地球科学 Q4 OCEANOGRAPHY

Oceanology

Pub Date : 2024-05-14 DOI: 10.1134/s0001437024020073

S. V. Katrasov, A. N. Bugaets, V. V. Zharikov, S. M. Krasnopeev, A. M. Lebedev, V. A. Mainulov

Abstract

Numerical experiments have been carried out to model hydrodynamic and morphodynamic processes to explain the nature of the spatial distribution of Zostera marina (eelgrass) in the inner bays of Posyet Bay. Hydrodynamic modeling has been performed using the Delft3D flow model. The Simulating WAves Near shore (SWAN) spectral wave model has been used to simulate wind wave parameters (direction of propagation, wave length and height, and near-bottom orbital velocities). The restructuring of the bottom topography under the influence of wind waves and the hydrodynamic influence of tidal and wind currents has been calculated with the Delft3D software package. The results of numerical experiments showed that the dynamics of the coastal bottom topography is determined by the nature of sediment motion in the coastal zone under the combined influence of waves and currents. A comparison of the modeling results with data on the distribution of Zostera showed a high correlation with model simulations of erosion and accumulation in the coastal zone.

摘要进行了模拟水动力和形态动力过程的数值实验，以解释波塞特湾内湾 Zostera marina（鳗草）空间分布的性质。水动力模型是利用 Delft3D 水流模型建立的。Simulating WAves Near shore (SWAN) 波谱模型用于模拟风浪参数（传播方向、波长和波高以及近底轨道速度）。利用 Delft3D 软件包计算了风浪影响下的海底地形重组以及潮汐和风流的水动力影响。数值实验结果表明，在波浪和海流的共同影响下，沿岸底层地形的动态变化是由沿岸带沉积物运动的性质决定的。将建模结果与 Zostera 分布数据进行比较后发现，模型模拟的海岸带侵蚀和堆积情况与之高度相关。

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引用次数: 0

Hydrogen Sulfide Contamination Studies in the Deep-Water Basin of the Middle Caspian Sea during a Cruise of the R/V Issledovatel Kaspiya in September 2022 2022 年 9 月 Issledovatel Kaspiya 号考察船在里海中部深水盆地进行硫化氢污染研究

IF 1 4区地球科学 Q4 OCEANOGRAPHY

Oceanology

Pub Date : 2024-05-14 DOI: 10.1134/s000143702402005x

L. A. Dukhova, A. S. Suvorova, A. K. Gruzevich, E. V. Oganesova, A. D. Kudyakov

Abstract

The article presents the results of comprehensive studies of the hydrological and chemical structure of the Middle and Northern Caspian Sea carried out aboard R/V Issledovatel Kaspiya in September 2022. It is shown, despite the continuing decrease in sea level, that there is no aeration of deep layers and a hydrogen sulfide layer persists with a tendency towards an increasing hydrogen sulfide concentration in the bottom layer. There is an enlargement in the oxygen minimum zone. The changes of the Caspian Sea ecosystem have led to weakening of nutrient transfer from the photic layer into the bottom layers and, as a consequence, to a decrease in the silicon concentration in the bottom layer. The results will make it possible to evaluate trends of ongoing changes.

摘要本文介绍了 2022 年 9 月在 Issledovatel Kaspiya 号考察船上对里海中部和北部水文和化学结构进行的综合研究结果。研究结果表明，尽管海平面持续下降，但深层不通气，硫化氢层持续存在，底层硫化氢浓度呈上升趋势。氧最小区扩大。里海生态系统的变化导致从光照层向底层的营养物质转移减弱，从而导致底层硅浓度下降。研究结果将有助于评估当前变化的趋势。

引用次数: 0

Organic Carbon Content in Dissolved and Particulate Forms in Kara Sea Water 喀拉海海水中以溶解和颗粒形式存在的有机碳含量

IF 1 4区地球科学 Q4 OCEANOGRAPHY

Oceanology

Pub Date : 2024-05-14 DOI: 10.1134/s0001437024020036

N. A. Belyaev, V. Y. Fedulov, M. D. Kravchishina, S. A. Shchuka

Abstract

The article summarizes data on the suspended particulate matter content and dissolved and particulate organic carbon concentrations in Kara Sea water for 2007–2022. A difference in the distributions of dissolved (DOC) and particulate (POC) organic carbon in the water column during autumn (September) and spring–summer (July–August) was revealed. An increase in dissolved organic carbon concentrations was recorded both on the surface and in the water column in summer. Analysis of the dependences of DOC concentrations on salinity showed that the increase in these concentrations is not associated with an increase in DOC concentrations in river runoff water. There was also a significant increase in DOC and POC concentrations in phytoplankton bloom zones throughout the water column. Thus, a relationship has been identified between seasonal increases in organic matter concentrations in the open part of the sea and phytoplankton bloom processes.

摘要本文总结了 2007-2022 年喀拉海海水中悬浮颗粒物含量、溶解有机碳和颗粒有机碳浓度的数据。结果表明，秋季（9 月）和春夏季（7 月至 8 月）水体中溶解性有机碳（DOC）和颗粒有机碳（POC）的分布存在差异。夏季表层和水体中的溶解有机碳浓度都有所增加。溶解有机碳浓度与盐度的关系分析表明，溶解有机碳浓度的增加与河流径流水中溶解有机碳浓度的增加无关。在整个水体中，浮游植物繁殖区的 DOC 和 POC 浓度也有明显增加。由此可见，海面开阔处有机物浓度的季节性增加与浮游植物的繁殖过程之间存在着一定的关系。

引用次数: 0

New Measuring and Data Transmission Equipment for Operational Oceanography at the Gelendgik Black Sea Test Site of the Shirshov Institute of Oceanology, Russian Academy of Sciences 俄罗斯科学院希尔绍夫海洋学研究所格连吉克黑海试验场实用海洋学新测量和数据传输设备

IF 1 4区地球科学 Q4 OCEANOGRAPHY

Oceanology

Pub Date : 2024-04-22 DOI: 10.1134/s000143702401003x

V. I. Baranov, A. G. Zatsepin, S. B. Kuklev, V. V. Ocherednik, V. V. Mashura

Abstract

The article describes the design and operational principles of the MDS-II bottom multimodem station, located in the coastal zone (depth of location 25 m) of the northeastern Black Sea at the Gelendzhik test site of the Shirshov Institute of Oceanology, Russian Academy of Sciences. The station is connected to the coastal center by a bottom fiber optic cable, through which power is supplied to the station, and online transmission of measurement data takes place. The station is an underwater server to which one can connect a measuring device and get a real-time access to it, as well as remotely control on its operation. The design of an automatic stationary station for vertical sounding (SSVS) of the water column, which is also used at the Gelendzhik test site, is described as well. This station is moored close to the MDS-II multimodem station and is connected to one of its modems. The station consists of a bottom electric winch installed on the seabed and a floating module (probe) on a cable line wound around the winch drum. When the command “sounding” is given, the cable unwinds and the floating module, equipped with temperature and pressure sensors, floats and measures the water temperature profile from the bottom layer to the sea surface. Then the cable is wound on a drum, and the floating module returns to the bottom layer. A prototype of a new SSVS is being developed, which will allow sounding of the water layer with a thickness of up to 100 m. It will be equipped with a multiparameter probe that makes joint measurements of hydrophysical and biooptical parameters.

文章介绍了位于俄罗斯科学院希尔绍夫海洋学研究所格连吉克试验场黑海东北部沿岸（水深 25 米）的 MDS-II 底层多模块站的设计和运行原理。该站通过海底光缆与沿岸中心相连，通过光缆向该站供电，并在线传输测量数据。该站是一个水下服务器，可以连接测量设备并实时访问，还可以远程控制其运行。此外，还介绍了水体垂直探测自动固定站（SSVS）的设计，该站也用于 Gelendzhik 试验场。该站停泊在 MDS-II 多调制解调器站附近，并与其中一个调制解调器相连。该站由安装在海床上的海底电动绞盘和缠绕在绞盘滚筒上的电缆线上的浮动模块（探头）组成。当发出 "探测 "指令时，电缆松开，装有温度和压力传感器的浮动模块浮起，测量从底层到海面的水温分布。然后将缆绳缠绕在滚筒上，浮动模块返回底层。目前正在开发一种新的 SSVS 原型，它可以探测厚度达 100 米的水层。

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引用次数: 0

Bioaccumulation of Chemical Elements and Organic Carbon in Macrozoobenthic Organisms of the Laptev Sea 拉普捷夫海大型底栖生物体内化学元素和有机碳的生物累积作用

IF 1 4区地球科学 Q4 OCEANOGRAPHY

Oceanology

Pub Date : 2024-04-22 DOI: 10.1134/s0001437024010041

L. L. Demina, S. V. Galkin, A. S. Solomatina

Abstract

Within the program “Marine Ecosystems of the Siberian Arctic,” based on materials collected during cruises 69 and 72 of the R/V Akademik Mstislav Keldysh, the distribution of chemical elements (As, Ba, Bi, Co, Cr, Cr, Cd, Co, Cu, Cr, Mn, Ni, Pb, Sc, Ti, Tl, Th, V, U, and Zn) and organic carbon in the benthic mass taxa of methane seepage fields in the Laptev Sea and outside of them was examined. For the first time, the bioaccumulation potential (BP) was quantified, taking into account, in addition to the concentrations of elements in organisms, their biomass. On the C-15 methane field, the ophiuroid population accumulates each element per square meter of seafloor up to 40 times greater than at the background station. Ophiuroids and bivalves exhibited elevated BP for Ni, As, Ba, Cu, Ti, V, Mn, and Zn compared to other elements. At the same time, the BP of ophiuroids significantly exceeds that of bivalves. It is suggested that the increased bioaccumulation of some heavy metals and metalloids is related to greater bioavailability of organic matter in the bottom sediments of methane seeps. Organic carbon revealed the highest BP, which was especially pronounced in the C-15 methane field. At the background station, taxa accumulate a significantly smaller (by a factor of 10) amount of carbon in their biomass. As a result of the detritus feeders’ activity, bottom sediments are enriched in organic carbon, which indicates an important contribution of benthic organisms to the carbon cycle in the Arctic seas.

摘要在 "西伯利亚北极海洋生态系统 "计划中，根据 "Akademik Mstislav Keldysh "号考察船第 69 和 72 次航行期间收集的材料，研究了拉普捷夫海甲烷渗漏区及其外的底栖生物群分类群中化学元素（As、Ba、Bi、Co、Cr、Cr、Cd、Co、Cu、Cr、Mn、Ni、Pb、Sc、Ti、Tl、Th、V、U 和 Zn）和有机碳的分布情况。除了考虑生物体内的元素浓度外，还首次对生物累积潜力（BP）进行了量化。在 C-15 甲烷场上，每平方米海底的片脚类动物对每种元素的累积量是背景站的 40 倍。与其他元素相比，片脚类动物和双壳类动物对 Ni、As、Ba、Cu、Ti、V、Mn 和 Zn 的生物累积量较高。同时，片脚类动物的生物累积浓度明显高于双壳类动物。这表明，一些重金属和类金属的生物累积量增加与甲烷渗漏底部沉积物中有机物的生物利用率提高有关。有机碳的生物累积量最高，这在 C-15 甲烷区尤为明显。在本底站，分类群在其生物量中积累的碳明显较少（10 倍）。由于碎屑取食者的活动，底层沉积物富含有机碳，这表明底栖生物对北极海域的碳循环做出了重要贡献。

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引用次数: 0

On Volcanism and Tectonics in the Evolution of the Guyots of the Magellan Seamounts (Pacific Ocean) 论麦哲伦海隆盖奥茨（太平洋）演化过程中的火山作用和构造作用

IF 1 4区地球科学 Q4 OCEANOGRAPHY

Oceanology

Pub Date : 2024-04-22 DOI: 10.1134/s0001437024010107

S. P. Pletnev, V. T. Sedin

Abstract

This report analyzes original geological materials on the Magellan Seamounts in the Pacific Ocean, obtained by the authors on numerous cruises of the R/V Gelendzhik. This chain of guyouts does not have a common volcanic basement and apparently formed in the second half of the Early Cretaceous on the oldest (Middle–Late Jurassic) fragment of the Pacific Plate. The main viewpoints on the genesis of the Magellan Seamounts are as follows: either they originated at the intersection of fracture zones or the Pacific Plate moved them from the Southern Hemisphere to their present-day position. Because of their high degree of study, the Magellan Seamounts are one of the key sites for understanding the mechanism underlying the origin of linear chains in the ocean. A comprehensive analysis of new geological data on the Magellan Seamounts has established the important role of magmatism and tectonics in the formation of the modern morphological forms, sedimentation, and influence on the paleoceangraphy. The periodic reactivation of these processes from the Early Cretaceous to Late Cenozoic can be traced in the cyclicity of sedimentation, the continuous growth of ore crusts, and the formation of secondary volcanic domes and cones.

摘要本报告分析了作者在 "格连吉克 "号考察船的多次航行中获得的有关太平洋麦哲伦海隆的原始地质资料。该海山链没有共同的火山基底，显然形成于早白垩世后半期，位于太平洋板块最古老的（中-晚侏罗世）碎片上。关于麦哲伦海隆的成因，主要观点如下：要么它们起源于断裂带的交汇处，要么是太平洋板块将它们从南半球移到了现在的位置。由于对麦哲伦海隆的研究程度较高，因此麦哲伦海隆是了解海洋线性链起源机制的关键地点之一。通过对麦哲伦海隆新地质数据的全面分析，确定了岩浆活动和构造作用在现代形态的形成、沉积作用以及对古地理学的影响中的重要作用。从沉积的周期性、矿壳的持续增长以及次级火山圆顶和火山锥的形成，可以追溯到从早白垩世到晚新生代这些过程的周期性重新启动。

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引用次数: 0

Comparative Analysis of Mineral Assemblages in Bottom Sediments from Buor-Khaya Bay 布阿尔-卡亚湾底层沉积物矿物组合对比分析

IF 1 4区地球科学 Q4 OCEANOGRAPHY

Oceanology

Pub Date : 2024-04-22 DOI: 10.1134/s0001437024010120

A. S. Ulyantsev

Abstract

According to the results of an analysis of 99 samples of bottom sediments and submarine permafrost from boreholes 1D-14, 3D-14, and 1D-15 drilled in Buor-Khaya Bay, differences in their mineral composition due to paleogeographic factors, namely, Late Quaternary changes in climate and sea level, as well as regional hydrodynamics are shown. The basis of the light fraction of minerals was quartz and feldspar (mainly plagioclase), found as grains of various dimensions and degree of sorting, as well as fine grains. To a lesser extent, chlorite, kaolinite, and serpentine have been noted; illite and smectite are rare. Forty-two accessory minerals were identified in the heavy fraction (average yield 0.95%) concentrated in fine-grained sands. It mainly consists of pyroxene, amphibole, carbonatite, epidote, zoisite, magnetite, mica, garnet, limonite, titanite, leucoxene, and ilmenite. Rutile, kyanite, sillimanite, zircon, tourmaline, apatite, and staurolite were found in smaller quantities. In the studied strata, plant remnants and carbonlike particles (kerogen) have been found, the contribution of which exceeds 5% by weight in a number of samples. The results of the study allowed the conclusion that the basis of the petrofund of the studied deposits are most likely sedimentary rocks of the Kharaulakh ridge of the Verkhoyansk Mountain system (sandstone, siltstone, and mudstone). The presence of characteristic accessory minerals in the sediments marks the unloading of igneous and metamorphic rocks, but their contribution is subordinate. They probably also include rocks of the Verkhoyansk Complex, common near Tiksi.

摘要根据对布奥尔-卡亚湾 1D-14、3D-14 和 1D-15 号钻孔中的 99 个海底沉积物和海底永久冻土样本的分析结果，显示了古地理因素（即第四纪晚期气候和海平面的变化以及区域流体力学）导致的矿物组成差异。轻组分矿物的基础是石英和长石（主要是斜长石），以不同尺寸和分选程度的颗粒以及细粒形式存在。在较小程度上，绿泥石、高岭石和蛇纹石也被发现；伊利石和吸铁石则很少见。在集中于细粒砂中的重矿物（平均产率为 0.95%）中发现了 42 种附属矿物。主要包括辉石、闪石、碳酸盐岩、绿泥石、黝帘石、磁铁矿、云母、石榴石、褐铁矿、榍石、白云石和钛铁矿。金红石、绢云母、菱锰矿、锆石、电气石、磷灰石和钠长石的发现量较少。在所研究的地层中，发现了植物残体和类碳颗粒（角质），在一些样本中，其含量超过了 5%（按重量计）。根据研究结果可以得出结论，所研究矿床的岩基很可能是上霍扬斯克山系哈劳拉赫山脊的沉积岩（砂岩、粉砂岩和泥岩）。沉积物中特征性附属矿物的存在标志着火成岩和变质岩的卸载，但它们的作用是次要的。它们可能还包括提克希附近常见的上霍扬斯克复合岩。

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引用次数: 0

Determination of the Nature of Hydrocarbons in the Barents Sea (Verification of Remote Sensing Data) 确定巴伦支海碳氢化合物的性质（验证遥感数据）

IF 1 4区地球科学 Q4 OCEANOGRAPHY

Oceanology

Pub Date : 2024-04-22 DOI: 10.1134/s0001437024010089

I. A. Nemirovskaya, A. Yu. Ivanov

Abstract

Based on remote sensing data obtained by Sentinel-1A and Sentinel-1B satellites in 2016–2022 and the results of analysis of hydrocarbons (aliphatic—AHCs, and polycyclic aromatic—PAHs) in bottom sediments collected in 2019–2022, the nature of oil slicks in various areas of the Barents Sea has been established. It has been shown that the distribution of oil slicks in coastal areas is greatly influenced by anthropogenic hydrocarbon inflows (mainly from shipping), which is confirmed by elevated AHC concentrations in coastal sediments (up to 73 μg/g) and in the composition of C_org (up to 3.6%). In the central and northern regions of the sea (in particular, at coordinates 75.2°–75.3° N and 31.5°–31.8° E, station 7105), the grouping of oil slicks is due to natural oil and gas manifestations. This is confirmed by the anomalous concentration of PAHs in the lower horizons of the sediment column, as well as their composition (dominance of 2-methylnaphthalene, a marker of their oil genesis). At the same time, the proportion of light homologues in the composition of alkanes increased, which may indicate their formation in the sedimentary sequence.

摘要根据哨兵-1A 和哨兵-1B 卫星在 2016-2022 年期间获得的遥感数据以及在 2019-2022 年期间收集的底层沉积物中碳氢化合物（脂肪族-AHCs 和多环芳烃-PAHs）的分析结果，确定了巴伦支海各地区浮油的性质。结果表明，沿海地区浮油的分布受人为碳氢化合物流入（主要来自航运）的影响很大，沿海沉积物中 AHC 浓度的升高（高达 73 微克/克）和 Corg 成分的升高（高达 3.6%）证实了这一点。在该海域的中部和北部地区（特别是坐标为北纬 75.2°-75.3°，东经 31.5°-31.8°，7105 站），浮油的分组是由于天然油气的表现。沉积柱下层多环芳烃的异常浓度及其组成（以 2-甲基萘为主，这是石油成因的标志）证实了这一点。同时，烷烃成分中轻同系物的比例增加，这可能表明它们是在沉积序列中形成的。

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引用次数: 0