New CGMW Tectonic Map of the Arctic

2020 ◽  
Author(s):  
Oleg Petrov ◽  
Manuel Pubellier ◽  
Andrey Morozov ◽  
Sergey Kashubin ◽  
Sergey Shokalsky ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Sedimentary Cover ◽  
Three Dimensional ◽  
Arctic Region ◽  
Geological Mapping ◽  
The Arctic ◽  
Northern Eurasia ◽  
Consolidated Crust ◽  
Circumpolar Arctic ◽  
Cover Thickness

<p>In 2019, the compilation of the new Tectonic Map of the Arctic (Tectonic Map of the Arctic, 2019: eds. O. Petrov, M. Pubellier) was completed. The map was compiled under the international project Atlas of Geological Maps of the Circumpolar Arctic, 1:5M with the participation of representatives of all Arctic states under the auspices of the Commission for the Geological Map of the World at UNESCO. The new 1:5M Tectonic map of the Arctic is a GIS project, which provides a transition to three-dimensional geological mapping of the Arctic. The project includes the crustal and sedimentary cover thickness maps, the crustal types map, the tectonic zonality map of the basement, schematic  map of key igneous provinces of the Circum-Arctic region and the geological transect compiled taking into account the latest scientific geological and geophysical data accumulated in recent decades as a result of high-latitude expeditions and scientific programs to substantiate the extended continental shelf in the Arctic. The new Tectonic map of the Arctic proved the continental nature of the Central Arctic Uplifts as a natural geological extension of Eurasia. Close structural relationships of deep-water parts of the Central Arctic and the shallow continental shelf of Northern Eurasia are substantiated by geological and geophysical characteristics of the consolidated crust, the upper mantle and sedimentary cover, as well as the common parameters of the magnetic and gravitational potential fields.</p>

Methods of displaying geospatial information using cartographic web technologies for the Arctic region and the continental shelf

2021 ◽  
Vol 971 (5) ◽  
pp. 15-22
Author(s):  
N.S. Kopylova ◽  
I.P. Starikov
Keyword(s):  
Information Systems ◽  
Continental Shelf ◽  
Arctic Region ◽  
Topographic Maps ◽  
The Arctic ◽  
Geospatial Information ◽  
Web Technologies ◽  
Data Design ◽  
The Arctic Region

In this article we discuss methods of displaying geospatial information for the Arctic region and the continental shelf using various web technologies in order to solve applied tasks associated with the development of the regional infrastructure. The assessment of the main projections’ metric capabilities basic for cartographic services is carried out, and the functionality of search and demonstration tasks that can be solved by means of such information systems is determined. The necessity of optimizing the approach to data design is noted. The proposed method for displaying geospatial information in the form of a single unified isometric cartographic projection will enable determining the position of objects within the planned accuracy of topographic maps at scale of 1

Simulation of electromagnetic signal of profile observations from a drifting surface

2020 ◽  
Author(s):  
Polina S. Osipova ◽  
◽  
Arkadiy V. Zlobinskiy ◽  
Vladimir V. Potapov ◽  
◽  
...  
Keyword(s):  
Electric Dipole ◽  
Born Approximation ◽  
Three Dimensional ◽  
Arctic Region ◽  
The Arctic ◽  
Electromagnetic Signal ◽  
Simulation Results ◽  
Dimensional Simulation ◽  
The Arctic Region

As part of the RSF project, the use of a drifting surface on which geophysical installations will be placed is proposed to study the environment in the Arctic region. The proposed method of electrical exploration is sounding with a circular electric dipole as a source. Studying the applicability of the technique requires three–dimensional simulation of the received signal. The paper shows some simulation results using the previously proposed algorithm based on the Born approximation.

scholarly journals SIMULATION OF ELECTROMAGNETIC SOUNDING SIGNALS FROM THE ARCTIC ICE SURFACE

2019 ◽  
Vol 2 (2) ◽  
pp. 116-123
Author(s):  
Polina Osipova ◽  
Vladimir Mogilatov ◽  
Arkadiy Zlobinskiy
Keyword(s):  
Born Approximation ◽  
Three Dimensional ◽  
Arctic Region ◽  
The Arctic ◽  
Electromagnetic Sounding ◽  
Three Dimensional Modeling ◽  
Ice Surface ◽  
Dimensional Modeling ◽  
Arctic Ice ◽  
The Arctic Region

Electromagnetic sounding of the Arctic region is hampered by the influence of the conductive layer of seawater. As part of the RSF project, it is proposed to use a circular electrical dipole (CED) to excite the field. Installation should be placed on drifting ice. This technique requires three-dimensional modeling for which there are complex algorithms. The paper proposes an approach using the Born approximation to simplify the implementation of three-dimensional modeling of the electromagnetic sounding signal using CED.

scholarly journals The role of tropopause polar vortices in the intensification of Summer Arctic cyclones

2021 ◽  
Author(s):  
Suzanne L. Gray ◽  
Kevin Hodges ◽  
Jonathan Vautrey ◽  
John Methven
Keyword(s):  
Three Dimensional ◽  
Arctic Region ◽  
The Arctic ◽  
Polar Regions ◽  
Synoptic Scale ◽  
Coherent Vortices ◽  
Cyclone Genesis ◽  
Ecmwf Reanalysis ◽  
The Arctic Region

<p>Human activity in the Arctic is expected to increase as new regions become accessible, with a consequent need for reliable forecasts of hazardous weather. Arctic cyclones are synoptic-scale cyclones developing within or moving into the Arctic region. Meso- to synoptic-scale tropopause-based coherent vortices called tropopause polar vortices (TPVs) are frequently observed in polar regions and are a proposed mechanism for Arctic cyclone genesis and intensification. While the importance of pre-existing tropopause-level features for cyclone development, and their existence as part of the three-dimensional mature cyclone structure, is well established in the mid-latitudes, evidence of the importance of pre-existing TPVs for Arctic cyclone development is more limited. Here we present a climatology and characteristics of summer Arctic cyclones and TPVs, produced by tracking them in the latest global ECMWF reanalysis (ERA5), and determine the role of pre-existing TPVs in the initiation and intensification of these cyclones.</p>

Late Weichselian Ice Sheet of Northern Eurasia

1980 ◽  
Vol 13 (1) ◽  
pp. 1-32 ◽  
Author(s):  
M. G. Grosswald
Keyword(s):  
Continental Shelf ◽  
Sea Level ◽  
Ice Sheet ◽  
West Siberia ◽  
The Arctic ◽  
Russian Plain ◽  
Northern Eurasia ◽  
Taimyr Peninsula ◽  
Continental Shelves ◽  
Late Weichselian

AbstractA considerable portion of Northern Eurasia, and particularly its continental shelf, was glaciated by inland ice during late Weichsel time. This was first inferred from such evidence as glacial striae, submarine troughs, sea-bed diamictons, boulder trains on adjacent land, and patterns of glacioisostatic crustal movements. Subsequently, the inference was confirmed by data on the occurrence and geographic position of late Weichselian end moraines and proglacial lacustrine deposits.The south-facing outer moraines in the northeastern Russian Plain, northern West Siberia, and on Taimyr Peninsula are underlain by sediments containing wood and peat, the radiocarbon dating of which yielded ages of 22,000 to 45,000 yr B.P. The youngest late-glacial moraines are of Holocene age: the double Markhida moraine in the lower Pechora River basin, presumably associated with “degradational” surges of the Barents Ice Dome, is underlain by sediments with wood and peat dated at 9000 to 9900 yr B.P.: this suggests that deglaciation of the Arctic continental shelf of Eurasia was not completed until after 9000 yr B.P.The reconstructed ice-front lines lead to the conclusion that the late Weichselian ice sheet of Northern Eurasia (proposed name: theEurasian Ice Sheet) extended without interruptions from southwestern Ireland to the northeastern end of Taimyr Peninsula, a distance of 6000 km: it covered an area of 8,370,000 km2, half of which lay on the present-day continental shelves and a quarter on lowlands that were depressed isostatically below sea level. Hence, the ice sheet was predominantly marine-based.A contour map of the ice sheet based both on the dependence of the heights of ice domes upon their radii and on factual data concerning the impact of bedrock topography upon ice relief has been constructed. The major features of the ice sheet were the British, Scandinavian, Barents, and Kara Ice Domes that had altitudes of 1.9 to 3.3 km and were separated from one another by ice saddles about 1.5 km high. At the late Weichselian glacial maximum, all the main ice-dispersion centers were on continental shelves and coastal lowlands, whereas mountain centers, such as the Polar Urals and Byrranga Range, played only a local role.The portions of the ice sheet that were grounded on continental shelves some 700 to 900 m below sea level were inherently unstable and could exist only in conjunction with confined and pinned floating ice shelves that covered the Arctic Ocean and the Greenland and Norwegian Seas.The Eurasian Ice Sheet impounded the Severnaya Dvina, Mezen, Pechora, Ob, Irtysh, and Yneisei Rivers, and caused the formation of ice-dammed lakes on the northern Russian Plain and in West Siberia. Until about 13,500 yr B.P. the proglacial system of lakes and spillways had a radial pattern; it included large West Siberian lakes, the Caspian and Black Seas, and ended in the Mediterranian Sea. Later, the system became marginal and discharged proglacial water mainly into the Norwegian Sea.

scholarly journals Legal issues and prospects for delimitation of continental shelf in the Arctic

2021 ◽  
pp. 37-48
Author(s):  
Elena Nikolaevna Moroz
Keyword(s):  
Continental Shelf ◽  
Arctic Region ◽  
The Arctic ◽  
National Interests ◽  
Gakkel Ridge ◽  
Bilateral Agreements ◽  
The Subject ◽  
United Nations Convention ◽  
Definition Of ◽  
The Arctic Region

This article is dedicated to the relevant problem of delimitation of the Arctic territories. There are currently several different approaches towards this question, but the effective one is the mechanism proposed by the United Nations Convention on the Law of the Sea. The absence of consensus on delimitation of continental shelf is substantiated by the intersection of interests of the countries in the Arctic region and strategically crucial consequences of dividing the Arctic: this is the matter of national security, geopolitical supremacy, increase of economic potential, energy and environmental security. The goal of this research consists in the analysis of recent achievements and prospects for delimitation of continental shelf. The subject of this article is the problems of delimitation of the jurisdiction of countries in the Arctic region. Methodological framework is comprised of the chronological method and method of analysis. The conclusion is made that the definition of state boundaries in the Arctic is a long process; since the decisions of the Commission on the Limits of the Continental Shelf is of advisory nature, it may lead to the disputes between the countries over the rendered decisions. It should be noted that international law has the essential mechanisms and means for the peaceful delimitation of maritime boundaries in Arctic waters. The author believes that the final definition of boundaries in the Arctic would be achieved through the compromise between the polar countries, and thus signing bilateral agreements without relying on recommendations of the Commission. It is underlined that the conventional principle of delimitation of boundaries in the Arctic Ocean does not meet the national interests of the Arctic Five, and requires a different approach due to the peculiarities of the ocean. The scientific novelty lies in the analysis of existing principles, instruments and problems of delimitation of boundaries in the Arctic, as well as in conclusions formulated by the author. The solution to the outlined problems can become the preservation of the international seabed within the framework of the concept common heritage of mankind in the area of the Gakkel Ridge, and in the area of Lomonosov Ridge delineation by the sectoral principle.

scholarly journals Short-lived climate forcers from current shipping and petroleum activities in the Arctic

2012 ◽  
Vol 12 (4) ◽  
pp. 1979-1993 ◽  
Author(s):  
K. Ødemark ◽  
S. B. Dalsøren ◽  
B. H. Samset ◽  
T. K. Berntsen ◽  
J. S. Fuglestvedt ◽  
...  
Keyword(s):  
Radiative Forcing ◽  
State Of The Art ◽  
Three Dimensional ◽  
Arctic Region ◽  
The Arctic ◽  
Mean Values ◽  
Albedo Effect ◽  
Carbon Aerosols ◽  
Petroleum Extraction ◽  
The Arctic Region

Abstract. Emissions of short-lived climate forcers (SLCF) in the Arctic region are expected to increase, notably from shipping and petroleum extraction. We here discuss changes in atmospheric SLCF concentrations and resulting radiative forcing (RF) from present day shipping and petroleum activities in the Arctic. The three-dimensional chemistry transport OsloCTM2 and a state of the art radiative forcing model are used, based on a coherent dataset of present day Arctic emissions. We find that the net RF of SLCF of shipping in the Arctic region is negative, mainly due to the direct and indirect RF effects of sulphate emissions, while the net RF of SLCF of petroleum extraction is positive, mainly due to the effects of black carbon aerosols in the air and deposited on snow. Strong seasonal variations of the sensitivities to emissions are found. In terms of annual mean values we find that the Arctic sensitivities to SLCF is similar to global average sensitivities. One exception to this is the stronger snow/ice albedo effect from BC emissions.

704 Three dimensional Na lidar observation in the Arctic region

2013 ◽  
Vol 2013 (0) ◽  
pp. 190-191
Author(s):  
Wataru Muranaka ◽  
Takuya Kawahara ◽  
Hikaru Fukasawa ◽  
Satonori Nozawa
Keyword(s):  
Three Dimensional ◽  
Arctic Region ◽  
The Arctic ◽  
Lidar Observation ◽  
The Arctic Region
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