Bibliographies thématiques / Barents-Kara

Littérature scientifique sur le sujet « Barents-Kara »

Auteur : Grafiati
Publié le 25 mai 2024

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Articles de revues sur le sujet "Barents-Kara"

1

Suslova, Anna A., Alina V. Mordasova, Antonina V. Stoupakova, Rinar M. Gilaev, Yury A. Gatovsky, Nataliya I. Korobova, Arsen R. Gumerov, Timur R. Sakhabo et Tatyana O. Kolesnikova. « Structure and petroleum prospects of the northern part of the Barents-Kara Sea region ». Georesursy 25, no 2 (30 juin 2023) : 47–63. http://dx.doi.org/10.18599/grs.2023.2.4.

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The geological structure and the petroleum potential of the western part of the Russian Arctic shelf are still matter for disputes, especially due to the absence of deep drilling and scarce data. One of the key problems in assessing the petroleum potential of the North Kara Sea Basin and the adjacent North Barents Sea Basin is the lack of a proven stratigraphic model of the sedimentary cover. The article presents a model of the structure of the sedimentary cover of the northern part of the Barents-Kara Sea region based on the analysis of the regional seismic data and comparison with outcrop sections of the archipelagos and adjacent land. The structure of the archipelagos is determined by tectonic events and rearrangements, which also reflect on the structure of the offshore sedimentary basins. In the structure of the northern part of the Barents-Kara Sea region, three large structures can be distinguished: North Barents Sea Basin, East Barents Steps, and North Kara Sea Basin. The East Barents Steps formed during Baikal orogeny and in the Riphean-Early Paleozoic time were uplifted, and separated the North Barents Sea and North Kara Sea basins. The North Kara Sea Basin was probably formed in the Riphean and subsided in the Early Paleozoic, while the section of the North Barents Sea Basin is composed of a thick of Upper Paleozoic-Mesozoic sequence. In the Permian-Triassic time, the western slope of the East Barents Uplift was involved in the intensive subsidence of the North Barents Sea Basin and transformed to the steps, while the Lower Paleozoic succession were buried under a thick Permian-Triassic sequence. In the sedimentary cover of the northern part of the Barents-Kara shelf, four promising petroleum plays can be distinguished: pre-Upper Devonian, Upper Devonian-Lower Carboniferous, Permian-Triassic, and Jurassic-Cretaceous. Pre-Upper Devonian promising petroleum complex within the study area are distinguished only in the North Kara Sea Basin, and hydrocarbon systems within it can be similar to hydrocarbon systems in the basins of the ancient platforms.
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Bakanev, S. V., et V. A. Pavlov. « Comparative Analysis of Morphometric and Reproductive Parameters of Snow Crab (<i>Chionoecetes opilio</i>) of the Kara and Barents Seas ». Океанология 63, no 5 (1 septembre 2023) : 762–72. http://dx.doi.org/10.31857/s0030157423050039.

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The paper presents a comparative analysis of size and reproductive parameters of snow crab in the Barents and Kara Seas, estimated in the period 2005–2019. In the Kara Sea, females reach maturity when their carapace width (CW) is over 30 mm, and the carapace width at 50% maturation is 38 mm. In the Barents Sea, female crabs reach functional maturity when their CW 35 mm, and the carapace width at 50% maturation is significantly higher compared to the Kara Sea and is equal to 51 mm. The fecundity of individuals of the same size, caught in the Kara Sea, is slightly lower than the fecundity of individuals recorded in the Barents Sea. At the same time, the increase in the number of eggs with an increase in CW in females of the Kara and Barents Seas is linear and statistically different (ANCOVA, p = 0.0327): 27 and 22 thousand eggs with an increase in CW by 10 mm, respectively. Compared to snow crabs in other geographic regions, in the Kara Sea, the values of the studied snow crabs parameters were close to the values estimated for individuals of the Arctic eastern seas: the Chukchi Sea and the Beaufort Sea. Most of the parameters of the Barents Sea population were comparable with the parameters of the populations of the southern part of the native range (the Sea of Japan, North-West Atlantic). It was revealed that the near-bottom temperature is to a large extent a limiting factor affecting not only the distribution of snow crab in the regions of the Northeast Atlantic, but largely determines the features of its morphometric and reproductive parameters during the acclimatization of the species in the Kara and Barents Seas.
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Yang, Xiao-Yi, et Xiaojun Yuan. « The Early Winter Sea Ice Variability under the Recent Arctic Climate Shift ». Journal of Climate 27, no 13 (juillet 2014) : 5092–110. http://dx.doi.org/10.1175/jcli-d-13-00536.1.

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This study reveals that sea ice in the Barents and Kara Seas plays a crucial role in establishing a new Arctic coupled climate system. The early winter sea ice before 1998 shows double dipole patterns over the Arctic peripheral seas. This pattern, referred to as the early winter quadrupole pattern, exhibits the anticlockwise sequential sea ice anomalies propagation from the Greenland Sea to the Barents–Kara Seas and to the Bering Sea from October to December. This early winter in-phase ice variability contrasts to the out-of-phase relationship in late winter. The mean temperature advection and stationary wave heat flux divergence associated with the atmospheric zonal wave-2 pattern are responsible for the early winter in-phase pattern. Since the end of the last century, the early winter quadrupole pattern has broken down because of the rapid decline of sea ice extent in the Barents–Kara Seas. This remarkable ice retreat modifies the local ocean–atmosphere heat exchange, forcing an anomalous low air pressure over the Barents–Kara Seas. The subsequent collapse of the atmospheric zonal wave-2 pattern is likely responsible for the breakdown of the early winter sea ice quadrupole pattern after 1998. Therefore, the sea ice anomalies in the Barents–Kara Seas play a key role in establishing new atmosphere–sea ice coupled relationships in the warming Arctic.
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Belchansky, Gennady I., Ilia N. Mordvintsev, Gregory K. Ovchinnikov et David C. Douglas. « Assessing trends in Arctic sea-ice distribution in the Barents and Kara seas using the Kosmos–Okean satellite series ». Polar Record 31, no 177 (avril 1995) : 129–34. http://dx.doi.org/10.1017/s0032247400013620.

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AbstractTrends in the annual minimum sea-ice extent, determined by three criteria (absolute annual minimum, minimum monthly mean, and the extent at the end of August), were investigated for the Barents and western Kara seas and adjacent parts of the Arctic Ocean during 1984–1993. Four definitions of ice extent were examined, based on thresholds of ice concentration: >90%, >70%, >40%, and >10% (El, E2, E3, and E4, respectively). Trends were studied using ice maps produced by the Russian Hydro-Meteorological Service, Kosmos and Okean satellite imagery, and data extracted from published literature. During 1984–1993, an increasing trend in the extent of minimum sea-ice cover was observed in the Barents, Kara, and combined Barents–Kara seas, for all ice-extent definitions. Root-mean-square differences between hydro-meteorological ice maps and satellite-image ice classifications for coincident areas and dates were 15.5%, 19.3%, 18.8%, and 11.5%, for ice extensions El–E4, respectively. The differences were subjected to Monte Carlo analyses to construct confidence intervals for the 10-year ice-map trends. With probability p = 0.8, the average 10-year increase in the minimum monthly mean sea-ice extent (followed in brackets by the average increase in the absolute annual minimum ice extent) was 12–46% [26–96%], 31–71% [55–140%], 30–69% [26–94%], and 48–94% [35–108%] in the Barents Sea; 20–60% [32–120%], 10–45% [20–92%], 2–36% [13–78%], and 10–47% [8–69%] in the Kara Sea; and 9–43% [26–59%], 9–41% [30–63%], 8–41% [22–52%] and 15–51% [21–51%] in the combined Barents–Kara seas, for ice concentrations El–E4, respectively. Including published data from 1966–1983, the trend in minimum monthly mean sea-ice extent for the combined 28-year period showed an average reduction of 8% in the Barents Sea and a 55% reduction in the western Kara Sea; ice extent at the end of August showed an average reduction of 33% in the Barents Sea.
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Klitzke, P., J. I. Faleide, M. Scheck-Wenderoth et J. Sippel. « A lithosphere-scale structural model of the Barents Sea and Kara Sea region ». Solid Earth Discussions 6, no 2 (10 juillet 2014) : 1579–624. http://dx.doi.org/10.5194/sed-6-1579-2014.

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Abstract. The Barents Sea and Kara Sea region as part of the European Arctic shelf, is geologically situated between the Proterozoic East-European Craton in the south and early Cenozoic passive margins in the north and the west. Proven and inferred hydrocarbon resources encouraged numerous industrial and academic studies in the last decades which brought along a wide spectrum of geological and geophysical data. By evaluating all available interpreted seismic refraction and reflection data, geological maps and previously published 3-D-models, we were able to develop a new lithosphere-scale 3-D-structural model for the greater Barents Sea and Kara Sea region. The sedimentary part of the model resolves four major megasequence boundaries (earliest Eocene, mid-Cretaceous, mid-Jurassic and mid-Permian). Downwards, the 3-D-structural model is complemented by the top crystalline crust, the Moho and a newly calculated lithosphere-asthenosphere boundary (LAB). The thickness distribution of the main megasequences delineates five major subdomains differentiating the region (the northern Kara Sea, the southern Kara Sea, the eastern Barents Sea, the western Barents Sea and the oceanic domain comprising the Norwegian-Greenland Sea and the Eurasia Basin). The vertical resolution of five sedimentary megasequences allows comparing for the first time the subsidence history of these domains directly. Relating the sedimentary structures with the deeper crustal/lithospheric configuration sheds some light on possible causative basin forming mechanisms that we discuss. The newly calculated LAB deepens from the typically shallow oceanic domain in three major steps beneath the Barents and Kara shelves towards the West-Siberian Basin in the east. Thereby, we relate the shallow continental LAB and slow/hot mantle beneath the southwestern Barents Sea with the formation of deep Paleozoic/Mesozoic rift basins. Thinnest continental lithosphere is observed beneath Svalbard and the NW Barents Sea where no Mesozoic/early Cenozoic rifting has occurred but strongest Cenozoic uplift and volcanism since Miocene times. The East Barents Sea Basin is underlain by a LAB at moderate depths and a high-density anomaly in the lithospheric mantle which follows the basin geometry and a domain where the least amount of late Cenozoic uplift/erosion is observed. Strikingly, this high-density anomaly is not present beneath the adjacent southern Kara Sea. Both basins share a strong Mesozoic subsidence phase whereby the main subsidence phase is younger in the South Kara Sea Basin.
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Stoupakova, Antonina V., Maria A. Bolshakova, Anna A. Suslova, Alina V. Mordasova, Konstantin O. Osipov, Svetlana O. Kovalevskaya, Tatiana O. Kolesnikova et al. « Generation potential, distribution area and maturity of the Barents-Kara Sea source rocks ». Georesursy 23, no 2 (25 mai 2021) : 6–25. http://dx.doi.org/10.18599/grs.2021.2.1.

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Identification of the source rock potential and distribution area is the most important stage of the basin analysis and oil, and gas reserves assessment. Based on analysis of the large geochemical and geological data base of the Petroleum geology department of the Lomonosov Moscow State University and integration of different-scale information (pyrolysis results and regional palaeogeographic maps), generation potential, distribution area and maturity of the main source rock intervals of the Barents-Kara Sea shelf are reconstructed. These source rocks wide distribute on the Barents-Kara Sea shelf and are characterized by lateral variability of generation potential and type of organic matter depending on paleogeography. During regional transgressions in Late Devonian, Early Permian, Middle Triassic and Late Jurassic, deposited source rocks with marine organic matter and excellent generation potential. However in the regression periods, during the short-term transgressions, formed Lower Carboniferous, Upper Permian, Induan, Olenekian and Late Triassic source rocks with mixed and terrestrial organic matter and good potential. Upper Devonian shales contain up to 20.6% (average – 3%) of marine organic matter, have an excellent potential and is predicted on the Eastern-Barents megabasin. Upper Devonian source rocks are in the oil window on the steps, platforms and monoclines, while are overmature in the basins. Lower Permian shale-carbonate source rock is enriched with marine organic matter (up to 4%, average – 1.4%) and has a good end excellent potential. Lower Permian source rocks distribute over the entire Barents shelf and also in the North-Kara basin (Akhmatov Fm). These rocks enter the gas window in the Barents Sea shelf, the oil window on the highs and platforms and are immature in the North-Kara basin. Middle Triassic shales contain up to 11.2% of organic matter, there is a significant lateral variability of the features: an excellent generation potential and marine organic matter on the western Barents Sea and poor potential and terrestrial organic matter in the eastern Barents Sea. Middle Triassic source rocks are in the oil window; in the depocenters it generates gas. Upper Jurassic black shales are enriched with marine and mixed organic matter (up to 27,9%, average – 7.3%) and have an excellent potential. On the most Barents-Kara Sea shelf, Upper Jurassic source rock are immature, but are in the oil window in the South-Kara basin and in the deepest parts of the Barents Sea shelf.
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Mordasova, Alina V., Antonina V. Stoupakova, Anna A. Suslova, Daria K. Ershova et Svetlana A. Sidorenko. « Conditions of formation and forecast of natural reservoirs in clinoform complex of the Lower Cretaceous of the Barents-Kara shelf ». Georesursy 21, no 2 (mai 2019) : 63–79. http://dx.doi.org/10.18599/grs.2019.2.63-79.

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Unique Leningradsky and Rusanovsky gascondensate fields in the Barrem-Cenomanian layer are discovered in the Kara Sea. Non-industrial accumulations of oil and gas have been discovered in the Lower Cretaceous sediments of the western part of the Barents Sea shelf. However, the structure and oil and gas potential of the Lower Cretaceous sediments of the Barents-Kara shelf remain unexplored. Based on the seismic-stratigraphic and cyclostratigraphic analysis, a regional geological model of the Lower Cretaceous deposits of the Barents-Kara shelf was created, the distribution area and the main stages of the accumulation of clinoforms were identified. As a result of a detailed analysis of the morphology of clinoform bodies, paleogeographic conditions were restored in the Early Cretaceous and a forecast of the distribution of sandy reservoirs was given
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Podporin, S. A., et A. V. Kholoptsev. « Current trends of dangerous winds frequency variation in the western sector of the Russian Arctic in winter-spring period ». Vestnik Gosudarstvennogo universiteta morskogo i rechnogo flota imeni admirala S. O. Makarova 15, no 2 (26 juillet 2023) : 215–25. http://dx.doi.org/10.21821/2309-5180-2023-15-2-215-225.

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The current trends in interannual changes in the frequency of winds that pose a danger to navigation on shipping routes of the Barents and Kara Seas in the winter-spring months are identified in the paper. Winds are considered dangerous if their average hourly speed over the water surface exceeds 15 m/s. The factual material is based on information from the ERA5 global reanalysis. The research methodology involves the use of standard methods of mathematical statistics. Trends are assessed for the time periods of 2001–2021 and 2010–2021. The study has allowed us to identify the water areas of the Barents Sea, where in December, January, April and May, significant rising trends in the frequency of dangerous winds are presented. No similar trends during the months of the winter-spring navigation period are found in the water areas of the Kara Sea in the modern period. It has been established that in December storm risks exhibit rising trends on the waterways of the Barents Sea passing north of Cape Zhelaniya. At the same time, in the area of the Kara Strait and its approaches, the tendencies of changes in the frequency of dangerous winds are more favorable. In January, the wind regime in this strait, on the contrary, has a clear tendency to worsen. The persistence of the identified trends in the region under consideration in the future is not guaranteed. Therefore, further development of its observation network remains an urgent problem of hydrometeorological provision of navigation in the Barents and Kara seas.
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Yang, Huidi, Jian Rao, Haohan Chen, Qian Lu et Jingjia Luo. « Lagged Linkage between the Kara–Barents Sea Ice and Early Summer Rainfall in Eastern China in Chinese CMIP6 Models ». Remote Sensing 15, no 8 (17 avril 2023) : 2111. http://dx.doi.org/10.3390/rs15082111.

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The lagged relationship between Kara–Barents sea ice and summer precipitation in eastern China is evaluated for Chinese models participating in phase 6 of the Coupled Model Intercomparison Project (CMIP6). A previous study revealed a dipole rainfall structure in eastern China related to winter Arctic sea ice variability. Almost all Chinese CMIP6 models reproduce the variability and climatology of the sea ice in most of the Arctic well except the transition regions with evident biases. Further, all Chinese CMIP6 models successfully simulate the decreasing trend for the Kara–Barents sea ice. The dipole centers located in the Yangtze–Huai River Valley (YHRV) and South China (SC) related to Kara–Barents sea ice variability are simulated with different degrees of success. The anomalous dipole rainfall structure related to the winter Kara–Barents sea ice variability can roughly be reproduced by two models, while other models reproduce a shifted rainfall anomaly pattern or with the sign reversed. The possible delayed influence of sea ice forcing on early summer precipitation in China is established via three possible processes: the long memory of ice, the long-lasting stratospheric anomalies triggered by winter sea ice forcing, and the downward impact of the stratosphere as the mediator. Most Chinese models can simulate the negative Northern Hemisphere Annular Mode (NAM) phase in early winter but fail to reproduce the reversal of the stratospheric anomalies to a positive NAM pattern in spring and early summer. Most models underestimate the downward impact from the stratosphere to the troposphere. This implies that the stratospheric pathway is essential to mediate the winter sea ice forcing and rainfall in early summer over China for CMIP6 models.
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Klitzke, P., J. I. Faleide, M. Scheck-Wenderoth et J. Sippel. « A lithosphere-scale structural model of the Barents Sea and Kara Sea region ». Solid Earth 6, no 1 (12 février 2015) : 153–72. http://dx.doi.org/10.5194/se-6-153-2015.

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Abstract. We introduce a regional 3-D structural model of the Barents Sea and Kara Sea region which is the first to combine information on the sediments and the crystalline crust as well as the configuration of the lithospheric mantle. Therefore, we have integrated all available geological and geophysical data, including interpreted seismic refraction and reflection data, seismological data, geological maps and previously published 3-D models into one consistent model. This model resolves four major megasequence boundaries (earliest Eocene, mid-Cretaceous, mid-Jurassic and mid-Permian) the top crystalline crust, the Moho and a newly calculated lithosphere–asthenosphere boundary (LAB). The thickness distributions of the corresponding main megasequences delineate five major subdomains (the northern Kara Sea, the southern Kara Sea, the eastern Barents Sea, the western Barents Sea and the oceanic domain comprising the Norwegian–Greenland Sea and the Eurasia Basin). Relating the subsidence histories of these subdomains to the structure of the deeper crust and lithosphere sheds new light on possible causative basin forming mechanisms that we discuss. The depth configuration of the newly calculated LAB and the seismic velocity configuration of the upper mantle correlate with the younger history of this region. The western Barents Sea is underlain by a thinned lithosphere (80 km) resulting from multiple Phanerozoic rifting phases and/or the opening of the NE Atlantic from Paleocene/Eocene times on. Notably, the northwestern Barents Sea and Svalbard are underlain by thinnest continental lithosphere (60 km) and a low-velocity/hot upper mantle that correlates spatially with a region where late Cenozoic uplift was strongest. As opposed to this, the eastern Barents Sea is underlain by a thicker lithosphere (~ 110–150 km) and a high-velocity/density anomaly in the lithospheric mantle. This anomaly, in turn, correlates with an area where only little late Cenozoic uplift/erosion was observed.
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Thèses sur le sujet "Barents-Kara"

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Van, Aalderen Victor. « Modéliser l'évolution du climat global et de la calotte eurasienne pendant la dernière déglaciation ». Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASJ029.

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La calotte marine de l'Antarctique de l'Ouest présente la particularité d'être en grande partie en contact avec l'océan. Les dernières observations révèlent une accélération de sa perte de masse sur les dernières décennies, essentiellement provoquée par l'augmentation de la fonte sous les plateformes de glace flottante. En revanche, son évolution future reste très incertaine, du fait de notre mauvaise compréhension des processus physiques mis en jeu entre la calotte et l'océan.La dernière déglaciation (-21 000 - -11 000 ans), constitue l'un des changements climatiques majeurs les plus récents de notre histoire. Cette période est marquée par une augmentation des températures atmosphériques globales et la disparition des calottes nord-américaine et eurasienne. L'étude de la calotte marine de Barents-Kara (BKIS), qui couvrait les mers de Barents et de Kara au Dernier Maximum Glaciaire (DMG, -21 000 ans) et faisait partie intégrante de la calotte eurasienne, revêt un intérêt particulier en raison de ses caractéristiques communes avec l'Antarctique de l'Ouest actuel. Identifier les mécanismes responsables de son recul permet de fournir des informations pour mieux comprendre le comportement de l'Antarctique de l'Ouest dans des contextes climatiques actuel et futur.L'impact du climat sur l'évolution d'une calotte marine dépend de deux processus principaux : le bilan de masse de surface, influencé par les températures atmosphériques et précipitations, ainsi que la fonte sous la glace flottante, liée aux températures océaniques et la salinité. Pour identifier les mécanismes ayant initié la fonte de BKIS, j'ai utilisé le modèle de glace GRISLI2.0 afin d'analyser la réponse de cette calotte à des perturbations du climat au DMG. Cette étude a mis en évidence le rôle déterminant des températures atmosphériques dans le déclenchement de la fonte de la calotte via la fonte de surface, tandis que les températures océaniques n'ont eu qu'un impact limité malgré une grande partie de la calotte BKIS en contact avec l'océan. J'ai aussi identifié que la fonte totale BKIS pouvait être attribuée à une instabilité mécanique à la ligne d'échouage, provoquée par une diminution de l'épaisseur de glace dû à une augmentation de la fonte de surface. Afin de mieux comprendre l'impact des calottes sur le climat global, j'ai également réalisé la première simulation transitoire de la dernière déglaciation avec le modèle IPSL-CM5A2 en modifiant à certaines périodes clés la géométrie des calottes de glace donnée par la reconstruction GLAC-1D. Les simulations montrent une tendance du réchauffement en accord avec les reconstructions, notamment lors du MWP1A caractérisé par une augmentation abrupte des températures atmosphériques. A partir d'expériences de sensibilité, j'ai mis en évidence que les changements de géométrie des calottes glaciaires ont participé à l'augmentation des températures atmosphérique via les rétroactions température-altitude et l'effet d'albédo. Par ailleurs, j'ai aussi montré que la dynamique océanique a été notablement perturbée par les flux d'eau douce issus de la fonte des calottes. Ce phénomène a conduit à une atténuation de l'intensité de la circulation méridienne de retournement de l'Atlantique et à une réduction de sa profondeur de plongée, entraînant un ralentissement du réchauffement, principalement dans l'Atlantique Nord. De plus, les expériences IPSL-CM5A2 simulent toutes un arrêt de la circulation des eaux de fond antarctiques au début du MWP1A, entraînant un refroidissement significatif d'une centaine d'années dans la mer d'Amundsen, suivi d'une réactivation de cette même circulation. Ces travaux contribuent ainsi à une meilleure compréhension des mécanismes complexes régissant la dynamique des calottes glaciaires et de leur interaction avec le climat, tout en offrant des éléments de réponse pour anticiper les conséquences des changements climatiques actuels et futurs, notamment en ce qui concerne l'Antarctique de l'Ouest
The marine West Antarctic ice sheet is characterized by being largely in contact with the ocean. The latest observations reveal an acceleration in its mass loss over the last few decades, mainly due to increased melting under floating ice shelves. However, its future evolution remains highly uncertain, due to our poor understanding of the physical processes at play between the ice sheet and the ocean.The last deglaciation (21 ka-11 ka) is one of the most recent major climatic changes in our history. This period is marked by an increase in global atmospheric temperatures and the melting of the North American and Eurasian ice sheets. The study of the Barents-Kara Ice Sheet (BKIS), which covered the Barents and Kara Seas during the Last Glacial Maximum (LGM, 21 ka) and was an integral part of the Eurasian Ice Sheet, is of particular interest because of its common features with present-day West Antarctica. Identifying the mechanisms responsible for its retreat allows to provide information to better understand the West Antarctic behavior within under present and future climatic conditions.The impact of climate on the evolution of a marine ice sheet depends on two main processes: The surface mass balance, depending on atmospheric temperatures and precipitation, and melting under floating ice, related to oceanic temperatures and salinity. In order to identify the mechanisms triggering the BKIS retreat, I used the GRISLI2.0 ice-sheet model to analyse the ice-sheet response to climate perturbations at the LGM. This study highlighted the key role of atmospheric temperatures in triggering the melting of the ice sheet via surface melting, while ocean temperatures had only a limited impact despite a large part of BKIS being in contact with the ocean. I also identified that the total retreat of BKIS could be attributed to a mechanical instability at the grounding line, caused by a decrease in ice thickness resulting from an increase in surface melting.In order to better understand the impact of ice sheets on the global climate, I have also carried out the first transient simulation of the last deglaciation with the IPSL-CM5A2 model, modifying the geometry of the ice sheets provided by the GLAC-1D reconstruction at some key periods. The simulations show a warming trend in line with the reconstructions, particularly during MWP1A, which was characterised by an abrupt rise in atmospheric temperatures. Using sensitivity experiments, I have shown that changes in the ice sheet geometry have contributed to the increase in atmospheric temperatures via temperature-altitude feedbacks and the albedo effect. Moreover, I have shown that ocean dynamics have been significantly altered by freshwater fluxes from the melting ice sheets. This has led to a weakening of the strength of the Atlantic Meridional Overturning Circulation and a reduction of its deepening, resulting in a warming slowdown, mainly located in the North Atlantic Ocean. In addition, the IPSL-CM5A2 experiments all simulate a shutdown of the Antarctic bottom water circulation at the onset of MWP1A, leading to a significant cooling of about 100 years in the Amundsen Sea, followed by a restart of this circulation.This work is contributing to a better understanding of the complex mechanisms governing the dynamics of the ice sheets and their interaction with the climate, while also providing a basis for anticipating the consequences of current and future climate change, particularly in West Antarctica
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Seidenglanz, Anne <1985&gt. « Impact of reduced sea ice conditions in the Barents-Kara seas on wintertime atmospheric circulation in the Euro-Atlantic sector ». Doctoral thesis, Università Ca' Foscari Venezia, 2019. http://hdl.handle.net/10579/15580.

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The sea ice cover in the Arctic Ocean has experienced an ongoing loss in volume and extent in the last decades with recognised consequences for the northern hemisphere atmospheric circulation. According to climate model projections, this loss is going to continue. Sea ice is an important component of the global climate system as its presence strongly affects the air-sea interaction (via changes in the fluxes of radiative energy, sensible heat, latent heat and momentum) and thus both the atmosphere and ocean. The Barents/Kara (B/K) Seas is the part of the Arctic Ocean experiencing the largest interannual variability and the largest loss in sea ice concentration (SIC) since the start of the observational period. Observational and modelling results point to increased surface heat fluxes from the ocean to the atmosphere, increased surface temperatures, and a reduced meridional surface temperature gradient in response to negative SIC anomalies, with far-reaching effects, including changes in the NAO and the eddy-driven jet stream a few months later. This implies a dual character of the response, from immediate local changes in surface fluxes (affecting atmospheric stability) to a delayed remote response in the atmospheric circulation. On a seasonal time scale, the Arctic sea ice concentration anomalies in autumn influence the winter Euro- Atlantic climate. In particular, recent results suggest a stratospheric pathway in which autumn Arctic sea ice anomalies modify the upward propagating planetary waves that effect the strength of the stratospheric polar vortex, and subsequently determine the tropospheric response in late winter. Here, this mechanism is investigated further using a fully-coupled seasonal prediction system by implementing a negative SIC anomaly in the B/K Seas lasting the whole month of November. This season is chosen because in this time of the year the surface fluxes between ocean and atmosphere are strong and the observed interannual variability in that area is largest. Preliminary results reveal a surface climate that resembles the one of a typical minimum year in terms of sea ice cover in the B/K Seas as described above. A downward-propagating signal from the stratosphere to the troposphere can be detected in late winter, thereby confirming previous results of a stratosphere-troposphere coupling in shaping the above-mentioned late-winter response.
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Klitzke, Peter [Verfasser], Magdalena [Akademischer Betreuer] Scheck-Wenderoth et Jan Inge [Akademischer Betreuer] Faleide. « A 3D lithosphere-scale model of the Barents Sea and Kara Sea region / Peter Klitzke ; Magdalena Scheck-Wenderoth, Jan Inge Faleide ». Aachen : Universitätsbibliothek der RWTH Aachen, 2020. http://d-nb.info/1231542152/34.

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Anselme, Brice. « Contribution de l'imagerie satellitaire visible, proche infrarouge et infrarouge thermique, à l'étude des mers arctiques eurasiatiques ». Phd thesis, Paris 4, 1997. https://tel.archives-ouvertes.fr/tel-00955324.

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Notre travail avait pour objectif d'apporter une contribution à l'amélioration des connaissances de l'environnement marin arctique. Plus précisément, nous nous sommes intéressés à l'étude des structures océaniques de surface, à la fois biologiques et physiques, dans les mers de Barents et de Kara, ainsi que dans la partie sud-est de la mer de Barents, à partir de l'imagerie spatiale opérant dans le domaine du visible, du proche infrarouge et de l'infrarouge thermique. Des mesures in situ nous ont permis de valider les algorithmes utilisés pour le traitement des images et de nous guider pour l'interprétation de celles-ci. Nous avons montré quelles étaient les zones apparemment les plus productives sur le plan de la production primaire et à quelle période de l'année se produisait l'efflorescence phytoplanctonique. Nous avons aussi mis en évidence les principaux fronts thermiques et hydrologiques, les directions suivies par les glaces de mer, leur relation avec les courants de surface, ainsi que le transport des sédiments et des polluants au débouché des fleuves sibériens. L'objectif sous-jacent à notre travail était de déterminer quelles étaient les régions les plus sensibles et les plus exposées à une éventuelle pollution du milieu marin. Au terme de ce travail, nous constatons que deux régions sont particulièrement vulnérables. Au nord de la mer de Barents, la zone de la lisière des glaces abrite un écosystème particulièrement important pour l'ensemble de la chaine alimentaire arctique ; une quelconque pollution dans cette région pourrait, selon son occurrence, avoir des conséquences désastreuses, en raison de l'intensité et de la brièveté de la floraison phytoplanctonique. La partie sud-est de la mer de Barents, qui abrite elle aussi de nombreuses espèces animales, et où circulent des masses d'eau et des glaces potentiellement contaminées, constitue la deuxième zone à risques. Il serait donc souhaitable de porter les efforts de recherche sur l'étude de ces deux régions, qui, outre leur richesses biologique, suscitent des intérêts croissants de la part des compagnies pétrolières en raison des réserves importantes du sous-sol en hydrocarbures et gaz naturel
The overall objective of our work was to improve the knowledge of the arctic marine environment. Using satellite remote sensing operating in the visible, near infrared and thermal infrared, we studied oceanic surface structures over the Barents and Kara seas, as well as in the southern part of the Barents sea. In situ measurements obtained from oceanographic campaigns allowed us to validate the algorithms we used for image processing and helped us in analyzing the images. We studied both biological and physical oceanic structures. Concerning primary production, we showed in which areas and when phytoplanktonic bloom start to develop. We also emphasized the areas where thermal and hydrological fronts appear, sea ice drift and its relationship to surface currents, as well as the transport of sediments and associated pollutants by rivers and their outflow distribution patterns into the sea. The final goal of our work was to outline which areas of the eurasiatic arctic seas are the most sensitive and exposed if a pollution should occur. We finally concluded that two areas were particularly vulnerable: the marginal sea ice zone in the northern Barents sea that supports large part of the phytoplanktonic ecosystem, source of the food chain. Due to the intensity and very short timing of the phytoplanktonic bloom in that area, a pollution could have serious consequences there. Important exchange of water masses and ice, potentially contaminated, occur in the southeastern part of the Barents sea, which constitute a large refuge for marine mammals and migratory birds. Concerns about oil and natural gas exploitation should lead future investigations to focus on monitoring of both areas
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Livres sur le sujet "Barents-Kara"

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Knies, Jochen. Spätquartäre Paläoumweltbedingungen am nördlichen Kontinentalrand des Barents-und Kara-See : Eine Multi-Parameter-Analyse = Late Quaternary paleoenvironment along the northern Barents and Kara seas continental margin : a multi parameter analysis. Bremerhaven : Alfred-Wegener-Institut für Polar- und Meeresforschung, 1999.

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Bakken, Vidar. Seabird colony databases of the Barents sea region and the Kara sea : Vidar Bakken, editor. 2e éd. Tromsø, Norway : Norsk polarinstitutt, 2002.

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Biological Atlas of the Arctic Seas 2000 : Plankton of the Barents and Kara Seas, International Ocean Atlas Series, V.2, 2000. [S.l : s.n., 2001.

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Chapitres de livres sur le sujet "Barents-Kara"

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Zenkovich, V., et Y. Shuysky. « USSR--White, Barents, and Kara Seas ». Dans The GeoJournal Library, 41–46. Dordrecht : Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2999-9_7.

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Predovsky, A. A., et V. V. Lyubtsov. « The Kara-Barents Sea Shelf and Its Provinces ». Dans Social and Environmental Impacts in the North : Methods in Evaluation of Socio-Economic and Environmental Consequences of Mining and Energy Production in the Arctic and Sub-Arctic, 25–34. Dordrecht : Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-007-1054-2_3.

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Spesivtsev, V. I. « The Cryolithozone of the Shelf of Barents and Kara Sea ». Dans Permafrost Response on Economic Development, Environmental Security and Natural Resources, 105–34. Dordrecht : Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0684-2_9.

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Poplavsky, E. I., A. M. Kuznetsova, A. S. Dosaev et Yu I. Troitskaya. « Trends in Barents and Kara Sea Areas from Reanalysis Data ». Dans Springer Geology, 73–77. Cham : Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-16575-7_8.

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Bukatov, A. A., E. A. Pavlenko et N. M. Solovei. « Estimation of Waters Vertical Structure in the Barents and Kara Seas ». Dans Processes in GeoMedia - Volume II, 41–53. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-53521-6_7.

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Glukhovets, D. I., E. A. Aglova, V. A. Artemiev, O. V. Glitko, V. A. Glukhov, D. N. Deryagin, S. K. Klimenko, M. A. Pavlova et I. V. Sahling. « Results of Hydrooptical Field Studies in the Barents and Kara Seas in September 2022 ». Dans Springer Proceedings in Earth and Environmental Sciences, 439–45. Cham : Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-47851-2_53.

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Grosswald, Mikhail G. « Extent and Melting History of the Late Weichselian Ice Sheet, the Barents-Kara Continental Margin ». Dans Ice in the Climate System, 1–20. Berlin, Heidelberg : Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-85016-5_1.

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Sivintsev, Yurii V. « An Appraisal of the Radiation Hazard of Radioactive Waste Discharges in the Kara and Barents Seas ». Dans Assessing the Risks of Nuclear and Chemical Contamination in the former Soviet Union, 85–100. Dordrecht : Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1645-6_9.

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Shevchenko, V. P., A. P. Lisitzin, R. Stein, V. V. Serova, A. B. Isaeva et N. V. Politova. « The Composition of the Coarse Fraction of Aerosols in the Marine Boundary Layer over the Laptev, Kara and Barents Seas ». Dans Land-Ocean Systems in the Siberian Arctic, 53–58. Berlin, Heidelberg : Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-60134-7_6.

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Fonnum, F., S. Hoibråten, P. Thoresen et O. Andreas Nedregård. « The NATO/CCMS/NACC Pilot Study on Cross-Border Radioactive Contamination Emanating from Defense-Related Installations in the Barents and the Kara Sea ». Dans Nuclear Submarine Decommissioning and Related Problems, 331–34. Dordrecht : Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1758-3_40.

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Actes de conférences sur le sujet "Barents-Kara"

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Mironcheva, E., P. Safronova, P. Golynchik, M. Ogarkova, A. Stoupakova, E. Henriksen et B. Rafaelsen. « Barents-Kara Region Palaeozoic-Mesozoic Hydrocarbon Complexes ». Dans 69th EAGE Conference and Exhibition incorporating SPE EUROPEC 2007. European Association of Geoscientists & Engineers, 2007. http://dx.doi.org/10.3997/2214-4609.201401825.

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Fomina, E., T. Kirillova - Pokrovskaya et S. Pavlov. « The Structure of the Barents - Kara Continental Margin ». Dans Saint Petersburg 2018. Netherlands : EAGE Publications BV, 2018. http://dx.doi.org/10.3997/2214-4609.201800303.

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Shilin, Mikhail, Mikhail Shilin, Denis Alexeev, Denis Alexeev, Vladimir Zhigulski, Vladimir Zhigulski, Kirill Petrov et al. « HIERARCHICAL REGIONALIZATION SYSTEM FOR BARENTS AND KARA SEAS IN CONNECTION WITH THE MULTI-LEVEL ENVIRONMENTAL MONITORING OF HYDRO-TECHNICAL MACRO-PROJECTS ». Dans Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b937049d462.28996151.

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The hierarchical system of landscape- and biome-based regionalization ranging from local to global scales is proposed for the Barents and Kara Seas region, based on principles of large marine ecosystems and ecoregions concept. Being a prerequisite for rational exploitation and protection of marine biological resources at different levels, developing of hierarchical regionalization system can be used for organizing the multi-level environmental monitoring of engineering macro-projects in the coastal zones of the Barents and Kara Seas – such as exploitation of Stockman gas field, and construction of Sabetta port complex.
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Shilin, Mikhail, Mikhail Shilin, Denis Alexeev, Denis Alexeev, Vladimir Zhigulski, Vladimir Zhigulski, Kirill Petrov et al. « HIERARCHICAL REGIONALIZATION SYSTEM FOR BARENTS AND KARA SEAS IN CONNECTION WITH THE MULTI-LEVEL ENVIRONMENTAL MONITORING OF HYDRO-TECHNICAL MACRO-PROJECTS ». Dans Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.21610/conferencearticle_58b43157e4a1d.

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The hierarchical system of landscape- and biome-based regionalization ranging from local to global scales is proposed for the Barents and Kara Seas region, based on principles of large marine ecosystems and ecoregions concept. Being a prerequisite for rational exploitation and protection of marine biological resources at different levels, developing of hierarchical regionalization system can be used for organizing the multi-level environmental monitoring of engineering macro-projects in the coastal zones of the Barents and Kara Seas – such as exploitation of Stockman gas field, and construction of Sabetta port complex.
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Vergun, Alexey, Alisa Baranskaya, Nataliya Belova Belova, Anatoly Kamalov, Osip Kokin, Dmitry Kuznetsov, Nataliya Shabanova et Stanislav Ogorodov. « Coastal Dynamics Monitoring at the Barents and Kara Seas ». Dans SPE Arctic and Extreme Environments Technical Conference and Exhibition. Society of Petroleum Engineers, 2013. http://dx.doi.org/10.2118/166927-ms.

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Liu, Jianfei, Guoqing Feng, Huilong Ren, Wenjia Hu et Yuwei Sun. « Design Optimization of Ship’s Bow Sailing in Kara Sea and Barents Sea ». Dans ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-95586.

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Abstract Ships performing their missions in the polar regions will inevitably suffer from sea ice collision, which will lead to structural safety problems. Therefore, ships should be designed according to the characteristics of polar sea ice to enable them to navigate safely in the polar regions. Based on the probability density curve of sea ice thickness and the occurrence frequency of sea ices of different sizes of the Kara Sea and the Barents Sea, this paper preliminarily designs ship’s bow sailing in the Kara Sea and the Barents Sea, establishes the ship’s bow-ice collision model and carries out numerical simulation to obtain the stress distribution. Then it optimizes the structure of the parts of the ship’s bow. After the optimization, the bow structure meets the strength requirements and the weight of the ship’s bow is relatively light.
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Vergun, Alexey, Alisa Baranskaya, Nataliya Belova Belova, Anatoly Kamalov, Osip Kokin, Dmitry Kuznetsov, Nataliya Shabanova et Stanislav Ogorodov. « Coastal Dynamics Monitoring at the Barents and Kara Seas (Russian) ». Dans SPE Arctic and Extreme Environments Technical Conference and Exhibition. Society of Petroleum Engineers, 2013. http://dx.doi.org/10.2118/166927-ru.

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Kunitsyn, A. V., et V. B. Piip. « Geology Aspects of Barents-Kara Region Based on Deep Seismic Sounding ». Dans Saint Petersburg 2008. Netherlands : EAGE Publications BV, 2008. http://dx.doi.org/10.3997/2214-4609.20146908.

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Nikishin, V. A., N. A. Malyshev, A. A. Valiuscheva, D. Y. Golovanov, L. N. Kleschina, V. A. Nikitina, A. M. Nikishin, G. V. Ulianov et D. E. Cherepanov. « The Geological Aspects of Evolution the North Kara Basin and East Barents Megabasin ». Dans 7th EAGE Saint Petersburg International Conference and Exhibition. Netherlands : EAGE Publications BV, 2016. http://dx.doi.org/10.3997/2214-4609.201600176.

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Velikhov, Evgeny Pavlovich, Vyacheslav Petrovich Kuznetsov, Vladimir Ivanovich Makarov, Vladimir Vladimirovich Mikhailichenko, Stanislav Alexandrovich Lavkovskiy et Ivan Fedorovich Glumov. « What’s Going on in the Russian Arctic ». Dans SNAME 9th International Conference and Exhibition on Performance of Ships and Structures in Ice. SNAME, 2010. http://dx.doi.org/10.5957/icetech-2010-186.

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This paper provides an overview of the status of affairs and activities currently going on in the Russian Arctic. It covers issues such as: delimitation of the Arctic shelf; operation of the nuclear icebreaker fleet; development of oil and gas deposits in coastal areas and in the Barents and Kara Seas; development of Russian territories situated beyond the Ural; operation of the Northern Sea Route and activities of Non-Commercial Partnership “Northern Sea Route”.
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