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Insights baseados em dados sobre a correlação entre configuração geofísica, topografia e sedimentos do fundo do mar no Mar de Ross, Antártica

Authors :
Polina Lemenkova
Schmidt United Institute of Physics of the Earth [Moscow] (IPE)
Russian Academy of Sciences [Moscow] (RAS)
Source :
Caderno de Geografia, Caderno de Geografia, 2021, 31 (64), pp.1-20. ⟨10.5752/p.2318-2962.2021v31n64p1⟩
Publication Year :
2021
Publisher :
HAL CCSD, 2021.

Abstract

International audience; Detailed mapping based on the high-resolution grids, such as GEBCO, ETOPO1, GlobSed, EGM-2008 is crucial for various domains of Earth sciences: geophysics, glaciology, Quaternary, sedimentology, geology, environmental science, geomorphology, etc. The study presented a GMTbased scripting technique of the cartographic data processing aimed at the comparative analysis of the bathymetry, sediment thickness, geologic objects and geophysical settings in the study area based on various datasets. The study area is located in the Ross Sea, Antarctic. The highest values of the sediment thickness over 7,500 m are dominating in the southwest segment of the Ross Sea closer to the Victoria Land, followed by the region over the Ross Ice Shelf with values between 5,500 to 7,000 m (170°-175°W). The increased sediment thickness (2,500 to 3,000 m) was also mapped seen in the region NE off the Sulzberger Bay (70-75°S to 140-155°W), caused by the closeness of the Marie Bird Land ice coasts. A remarkable correlation between the gravity and the topography of the sea-land border in the Marie Bird Land area is well reflected in the coastal line and a set of the higher values in the free-air gravity. On the contrary, negative values (-60 to-80 mGal) are notable along the submarine troughs stretching parallel in the western part of the basin: e.g. the trough stretching in NW-SE direction in the 170°W-175°E, 65°S-68°S, between the 167°W-175°W, 70°S-72°S. Such correlations are clearly visible on the map, indicating geological lineaments and bathymetric depressions correlating with gravity grids. The paper contributes to the regional studies of the Ross Sea, the Antarctic and Polar region, and development of the technical cartographic methodologies by presenting an application of the GMT for thematic mapping.; O mapeamento detalhado com base em grades de alta resolução, como GEBCO, ETOPO1, GlobSed, EGM-2008 é fundamental para vários campos das ciências da terra: geofísica, glaciologia, quaternário, sedimentologia, geologia, ciências ambientais, geomorfologia, etc. O estudo apresenta métodos de processamento de dados de mapas com script baseado em GMT visando a análise comparativa de batimetria, espessura de sedimentos, características geológicas e condições geofísicas na área de estudo com base em vários conjuntos de dados. A Área de Estudo está localizada no Mar de Ross, na Antártica. Os valores mais altos de espessura de sedimento de mais de 7.500 m prevalecem no sudoeste do Mar de Ross próximo a Victoria Land, seguido pela área acima da plataforma de gelo de Ross em valores entre 5.500 e 7.000 m (170 ° -175 ° W). ... O aumento da espessura do sedimento (de 2.500 a 3.000 m) também foi mapeado na área nordeste da Baía Sulzberger (de 70-75 ° S a 140-155 ° W), devido à proximidade das costas de gelo da Terra Marie Bird. A notável correlação entre a gravidade e a topografia da fronteira marítima perto da Terra Marie Bird é bem refletida na linha costeira e em muitos dos maiores valores de gravidade ao ar livre. Em contraste, os valores negativos (-60 a -80 mGal) são perceptíveis ao longo das muralhas submarinas que se estendem paralelamente na parte oeste da bacia: por exemplo, uma trincheira que se estende na direção noroeste-sudeste a 170 ° W-175 ° E, 65 ° S-68 ° S, entre 167 ° W-175 ° W, 70 ° S-72 ° S Essas correlações são claramente visíveis no mapa, indicando lineamentos geológicos e depressões batimétricas correlacionadas com grades gravimétricas. O documento contribui para estudos regionais do Mar de Ross, Antártica e região polar, bem como para o desenvolvimento de metodologias técnicas de mapeamento, introduzindo a aplicação GMT para mapeamento temático.

Subjects

Subjects :
Ice shelf
Ross Sea
ACM: I.: Computing Methodologies/I.3: COMPUTER GRAPHICS/I.3.6: Methodology and Techniques
Bathymetry
ACM: I.: Computing Methodologies/I.5: PATTERN RECOGNITION
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere
GMT
geography.geographical_feature_category
[SDE.IE]Environmental Sciences/Environmental Engineering
General Medicine
ACM: I.: Computing Methodologies/I.4: IMAGE PROCESSING AND COMPUTER VISION/I.4.1: Digitization and Image Capture
[SDV.BIBS]Life Sciences [q-bio]/Quantitative Methods [q-bio.QM]
Seafloor spreading
[INFO.INFO-GR]Computer Science [cs]/Graphics [cs.GR]
ACM: I.: Computing Methodologies/I.5: PATTERN RECOGNITION/I.5.1: Models
Geophysics
ACM: I.: Computing Methodologies/I.3: COMPUTER GRAPHICS/I.3.6: Methodology and Techniques/I.3.6.5: Standards
ACM: I.: Computing Methodologies/I.4: IMAGE PROCESSING AND COMPUTER VISION/I.4.5: Reconstruction
[SDE]Environmental Sciences
Geology
ACM: I.: Computing Methodologies
Cartography
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]
[INFO.INFO-DS]Computer Science [cs]/Data Structures and Algorithms [cs.DS]
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
Structural basin
ACM: I.: Computing Methodologies/I.3: COMPUTER GRAPHICS
ACM: I.: Computing Methodologies/I.4: IMAGE PROCESSING AND COMPUTER VISION/I.4.0: General
ACM: I.: Computing Methodologies/I.3: COMPUTER GRAPHICS/I.3.6: Methodology and Techniques/I.3.6.2: Graphics data structures and data types
[INFO.INFO-LG]Computer Science [cs]/Machine Learning [cs.LG]
General Bathymetric Chart of the Oceans
[INFO]Computer Science [cs]
14. Life underwater
[INFO.INFO-HC]Computer Science [cs]/Human-Computer Interaction [cs.HC]
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology
Sedimentology
Southern Ocean
ACM: I.: Computing Methodologies/I.5: PATTERN RECOGNITION/I.5.4: Applications
[SDU.STU.AG]Sciences of the Universe [physics]/Earth Sciences/Applied geology
[INFO.INFO-MS]Computer Science [cs]/Mathematical Software [cs.MS]
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics
geography
[INFO.INFO-PL]Computer Science [cs]/Programming Languages [cs.PL]
ACM: I.: Computing Methodologies/I.4: IMAGE PROCESSING AND COMPUTER VISION
[INFO.INFO-CV]Computer Science [cs]/Computer Vision and Pattern Recognition [cs.CV]
15. Life on land
[INFO.INFO-IA]Computer Science [cs]/Computer Aided Engineering
[INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation
Glaciology
ACM: I.: Computing Methodologies/I.3: COMPUTER GRAPHICS/I.3.2: Graphics Systems
ACM: I.: Computing Methodologies/I.2: ARTIFICIAL INTELLIGENCE
ACM: I.: Computing Methodologies/I.6: SIMULATION AND MODELING
13. Climate action
Antarctic
Quaternary

Details

Language :
English
ISSN :
23182962
Database :
OpenAIRE
Journal :
Caderno de Geografia, Caderno de Geografia, 2021, 31 (64), pp.1-20. ⟨10.5752/p.2318-2962.2021v31n64p1⟩
Accession number :
edsair.doi.dedup.....5ac7f5043e295d2edfb057e39de97e04