Academic literature on the topic 'Heterogeneous oceanic data'
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Journal articles on the topic "Heterogeneous oceanic data":
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Jourdin, F., O. Francis, P. Vincent, and P. Mazzega. "Some results of heterogeneous data inversions for oceanic tides." Journal of Geophysical Research: Solid Earth 96, B12 (November 10, 1991): 20267–88. http://dx.doi.org/10.1029/91jb00426.
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Sun, L. Charles. "Data Inter-Operability Driven by Oceanic Data Assimilation Needs." Marine Technology Society Journal 33, no. 3 (January 1, 1999): 55–66. http://dx.doi.org/10.4031/mtsj.33.3.7.
Abstract:
An interactive data access and retrieval system, developed at the U.S. National Oceanographic Data Genter (NODG) and available at <ext-link ext-link-type="uri" href="http://www.node.noaa.gov">http://www.node.noaa.gov</ext-link>, is presented in this paper. The purposes of this paper are: (1) to illustrate the procedures of quality control and loading oceanographic data into the NODG ocean databases and (2) to describe the development of a system to manage, visualize, and disseminate the NODG data holdings over the Internet. The objective of the system is to provide ease of access to data that will be required for data assimilation models. With advances in scientific understanding of the ocean dynamics, data assimilation models require the synthesis of data from a variety of resources. Modern intelligent data systems usually involve integrating distributed heterogeneous data and information sources. As the repository for oceanographic data, NOAA’s National Oceanographic Data Genter (NODG) is in a unique position to develop such a data system. In support of the data assimilation needs, NODG has developed a system to facilitate browsing of the oceanographic environmental data and information that is available on-line at NODG. Users may select oceanographic data based on geographic areas, time periods and measured parameters. Once the selection is complete, users may produce a station location plot, produce plots of the parameters or retrieve the data.
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Chen, Shan-Tai, Shung-Lin Dou, and Wann-Jin Chen. "A Data Mining Approach to Rainfall Intensity Classification Using TRMM/TMI Data." Journal of Advanced Computational Intelligence and Intelligent Informatics 12, no. 6 (November 20, 2008): 516–22. http://dx.doi.org/10.20965/jaciii.2008.p0516.
Abstract:
The systematic approach we propose for classifying oceanic rainfall intensity during the typhoon season consists of two major steps – 1) identifying the rain areas and 2) classifying rainfall intensity intonormalandheavyfor these areas. The heterogeneous hierarchical classifier (HHC), an ensemble model we developed for accurately identifying heavy rainfall events, consists of a set of base classifiers. The base classifiers are independently constructed through heterogeneous data mining approaches such as artificial neural networks, decision trees, and self-organizing maps. The meteorological satellite Tropical Rainfall Measuring Mission (TRMM) microwave imager (TMI) data from 2000 to 2005 are used to create the classification models. TRMM precipitation radar (PR) data and rain gauge data from Automatic Rainfall and Meteorological Telemetry System (ARMTS) measurement are used as ground truth data to evaluate models. Two thirds of the dataset is used for model training and one third for testing. Experimental results show that the proposed model classifies rainfall intensity highly accurately and outperforms previously published methods.
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Yi, Shuang, and Kosuke Heki. "Heterogeneous oceanic mass distribution in GRACE observations and its leakage effect." Geophysical Journal International 221, no. 1 (January 10, 2020): 603–16. http://dx.doi.org/10.1093/gji/ggaa022.
Abstract:
SUMMARY Signal leakage between the land and ocean is a challenge in using Gravity Recovery and Climate Experiment (GRACE) observation data to study global mass redistributions. Although the leakage occurs in both directions, more attention has been paid to the land-to-ocean leakage and less to the ocean-to-land leakage. Here, we show that the ocean-to-land leakage is non-uniform and non-negligible and propose a new forward modelling method to fully consider bi-directional leakages with the help of the global Ocean ReAnalysis System ORAS5. This observation-driven model could significantly reduce the variations in ocean grids and thus decrease the ocean-to-land leakage. The results with different treatment of the ocean signal leakage are compared. We find that failing to consider the ocean-to-land leakage will cause an underestimation of ∼20 per cent in the seasonal variation and will introduce a bias of several giga-tons in the secular trend. Although the uniform and non-uniform model have similar results in the global average of seasonal mass variations, the non-uniform ocean model is necessary in most places, especially near the Arctic Ocean, the Sea of Japan and the Gulf of Carpentaria. Despite these achievements, we also point out that there is still much room for improvement in ocean mass models, particularly in long-term trends. Our results indicate the importance of the ocean-to-land leakage correction in the mass estimation in coastal land areas using the GRACE data.
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Sokolov, S. D., G. Ye Bondarenko, A. K. Khudoley, O. L. Morozov, M. V. Luchitskaya, M. I. Tuchkova, and P. W. Layer. "Tectonic reconstruction of Uda-Murgal arc and the Late Jurassic and Early Cretaceous convergent margin of Northeast Asia–Northwest Pacific." Stephan Mueller Special Publication Series 4 (September 17, 2009): 273–88. http://dx.doi.org/10.5194/smsps-4-273-2009.
Abstract:
Abstract. A long tectonic zone composed of Upper Jurassic to Lower Cretaceous volcanic and sedimentary rocks is recognized along the Asian continent margin from the Mongol-Okhotsk fold and thrust belt on the south to the Chukotka Peninsula on the north. This belt represents the Uda-Murgal arc, which was developed along the convergent margin between Northeast Asia and Northwest Meso-Pacific. Several segments are identified in this arc based upon the volcanic and sedimentary rock assemblages, their respective compositions and basement structures. The southern and central parts of the Uda-Murgal arc were a continental margin belt with heterogeneous basement represented by metamorphic rocks of the Siberian craton, the Verkhoyansk terrigenous complex of Siberian passive margin and the Koni-Taigonos Late Paleozoic to Early Mesozoic island arc with accreted oceanic terranes. At the present day latitude of the Pekulney and Chukotka segments there was an ensimatic island arc with relicts of the South Anyui oceanic basin in a backarc basin. Accretionary prisms of the Uda-Murgal arc and accreted terranes contain fragments of Permian, Triassic to Jurassic and Jurassic to Cretaceous (Tithonian–Valanginian) oceanic crust and Jurassic ensimatic island arcs. Paleomagnetic and faunal data show significant displacement of these oceanic complexes and the terranes of the Taigonos Peninsula were originally parts of the Izanagi oceanic plate.
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Piontkovski, S. A., I. A. Minsky, and Ya V. Meger. "LONG-TERM VARIABILITY OF OCEANIC ZOOPLANKTON BIOMASS." Водные биоресурсы и среда обитания 6, no. 3 (2023): 52–65. http://dx.doi.org/10.47921/2619-1024_2023_6_3_52.
Abstract:
Numerous scientific publications are dedicated to the analysis of long-term variability of zooplankton biomass in oceanic and neritic zones of the World Ocean. The number of these publications keeps growing with the availability of new data. Relevance of this research can be attributed to the crucial role of zooplankton biomass in the spatio-temporal and trophic structure of aquatic ecosystems. Inter-annual fluctuations of zooplankton biomass affect the catch volumes of small pelagic fish. This research is aimed at identification of statistically valid long-term trends of the World Ocean zooplankton biomass, which involves the analysis of the data from databases and published articles describing such variability. Regional and international databases (namely COPEPOD, HOT, JGOFS, ODATE and others), which are available in the form of CDs, archived materials, and online, have been used. For the time series of the biomass across 21 areas of the World Ocean (Pacific, Indian, Atlantic Oceans and internal seas), the regression analysis has been conducted, which made it possible to estimate the parameters of linear monotonic trends. Based on bivariate spatial autocorrelation functions, the areas within which the trends are statistically homogeneous have been identified. A comparative study of long-term variability of zooplankton biomass, phytoplankton biomass, primary production, and the total live biomass of the pelagic World Ocean is presented. It is shown that the spatial distribution of positive, negative and neutral trends of zooplankton biomass on the World Ocean scale is heterogeneous. The negative monotonic trends of zooplankton biomass are found to be prevailing (in 1980–2010s); the regression parameters describing them are presented.
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Boev, Blažo, Vladica Cvetković, Dejan Prelević, Kristina Šarić, and Ivan Boev. "EAST VARDAR OPHIOLITES REVISITED: A BRIEF SYNTHESIS OF GEOLOGY AND GEOCHEMICAL DATA." Contributions, Section of Natural, Mathematical and Biotechnical Sciences 39, no. 1 (July 2, 2018): 51. http://dx.doi.org/10.20903/csnmbs.masa.2018.39.1.119.
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The study reports and synthesizes the available geological and geochemical data on the East Vardar ophiolites comprising most known occurrences from the South Apuseni Mountains in Romania to the tip of the Chalkidiki Pen-insula in Greece. The summarized geological data suggest that the East Vardar ophiolites are mostly composed of the magmatic sequences, whereas the mantle rocks are very subordinate. The members of the magmatic sequences are characterized by the presence of abundant acid and intermediate volcanic and intrusive rocks. The age of these ophio-lites is paleontologically and radiometrically constrained and these data suggest that the East Vardar ophiolite formed as a short-lived oceanic realm that was emplaced before the uppermost Kimmeridgian. A relatively weak adakitic affinity is shown by intra-ophiolitic acid and intermediate rocks in many East Vardar provinces. It can be taken as evidence that the subduction of the young and hot slab, most likely along the earlier spreading ridge has occurred. A paleo-tectonic reconstruction consisting of four stages is proposed. It involves: a) an early/mid-Jurassic north-northeastward subduction of the West Vardar oceanic plate; b) the formation of a mid-Jurassic volcanic arc and a narrow back-arc oceanic stripe of East Vardar behind it; c) the mid-/Upper Jurassic initiation of East Vardar subduc-tion along the ridge axis, and d) complex and heterogeneous emplacement of the East Vardar ophiolites. So far avail-able data allow for having relatively clear ideas about the origin and evolution of the East Vardar ophiolites. Howev-er, in order to provide better understanding of all aspects of its evolution we need to answer additional questions re-lated to the true structural position of the East Vardar ophiolites slices in Serbia, the exact nature of subduction that caused back-arc spreading (intraoceanic vs subduction under continent?) and the full significance of the adakitic sig-nature shown by rocks in the East Vardar provinces other than Demir Kapija.
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Kotowski, Alissa J., and Whitney M. Behr. "Length scales and types of heterogeneities along the deep subduction interface: Insights from exhumed rocks on Syros Island, Greece." Geosphere 15, no. 4 (June 24, 2019): 1038–65. http://dx.doi.org/10.1130/ges02037.1.
Abstract:
Abstract We use structural and microstructural observations from exhumed subduction-related rocks exposed on Syros Island (Cyclades, Greece) to provide constraints on the length scales and types of heterogeneities that occupy the deep subduction interface, with possible implications for episodic tremor and slow slip. We selected three Syros localities that represent different oceanic protoliths and deformation conditions within a subduction interface shear zone, including: (1) prograde subduction of oceanic crust to eclogite facies; (2) exhumation of oceanic crust from eclogite through blueschist-greenschist facies; and (3) exhumation of mixed mafic crust and sediments from eclogite through blueschist-greenschist facies. All three localities preserve rheological heterogeneities that reflect metamorphism of primary lithological, geochemical, and/or textural variations in the subducted protoliths and that take the form of brittle pods and lenses within a viscous matrix. Microstructural observations indicate that the matrix lithologies (blueschists and quartz-rich metasediments) deformed by distributed power-law viscous flow accommodated by dislocation creep in multiple mineral phases. We estimate bulk shear zone viscosities ranging from ∼1018 to 1020 Pa-s, depending on the relative proportion of sediments to (partially eclogitized) oceanic crust. Eclogite and coarse-grained blueschist heterogeneities within the matrix preserve multiple generations of dilational shear fractures and veins formed under high-pressure conditions. The veins commonly show coeval or overprinting viscous shear, suggesting repeated cycles of frictional and viscous strain. These geologic observations are consistent with a mechanical model of episodic tremor and slow slip (ETS), in which the deep subduction interface is a rheologically heterogeneous distributed shear zone comprising transiently brittle (potentially tremor-genic) sub-patches within a larger, viscously creeping interface patch. Based on our observations of outcrop and map areas of heterogeneous patches and the sizes, distributions, and amounts of brittle offset recorded by heterogeneities, we estimate that simultaneous brittle failure of heterogeneities could produce tremor bursts with equivalent seismic moments of 4.5 × 109–4.7 × 1014 N m, consistent with seismic moments estimated from geophysical data at active subduction zones.
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Srivastava, Rohit, and Ruchita Shah. "Study of Monsoonal Features Using Regional Climate Model over Heterogeneous Monsoon Dominated Region." E3S Web of Conferences 101 (2019): 03004. http://dx.doi.org/10.1051/e3sconf/201910103004.
Abstract:
Global warming is an increase in average global temperature of the earth which lead to climate change. Heterogeneity in the earth-atmosphere system becomes difficult to capture at low resolution (1°x1°) by satellite. Such features may be captured by using high resolution model such as regional climate model (0.5°x 0.5°). This type of study is quite important for a monsoon dominated country like India where Indo-Gangetic Plains (IGP) faces highest heterogeneity due to its geographic location. Present study compares high resolution model features with satellite data over IGP for monsoon season during a normal rainfall year 2010 to understand the actual performance of model. Almost whole IGP simulates relative humidity (RH) with wide range (~50-100%), whereas satellite shows it with narrow range (~60-80%) during September, 2010. Thus model is able to pick the features which were missed by satellite. Hence further model simulation extends over India and adjoining oceanic regions which simulates data of southwest monsoon with high (~70-100%) RH, high (~0.4-0.7) cloud fraction (CF) and low (~80-200 W/m2) outgoing longwave radiation (OLR) over Arabian Sea during June, 2010. Such type of study can be useful to understand heterogeneity at regional scale with the help of high resolution model generated data.
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Lücke, O. H., and I. G. Arroyo. "Density structure and geometry of the Costa Rican subduction zone from 3-D gravity modeling and local earthquake data." Solid Earth Discussions 7, no. 3 (July 14, 2015): 1941–77. http://dx.doi.org/10.5194/sed-7-1941-2015.
Abstract:
Abstract. The eastern part of the oceanic Cocos Plate presents a heterogeneous crustal structure due to diverse origins and ages as well as plate-hot spot interactions which originated the Cocos Ridge, a structure that converges with the Caribbean Plate in southeastern Costa Rica. The complex structure of the oceanic plate directly influences the dynamics and geometry of the subduction zone along the Middle American Trench. In this paper an integrated interpretation of the slab geometry is presented based on three-dimensional density modeling of combined satellite and surface gravity data, constrained by available geophysical and geological data and seismological information obtained from local networks. The results show the continuation of steep subduction geometry from the Nicaraguan margin into Northwestern Costa Rica, followed by a moderate dipping slab under the Central Cordillera toward the end of the Central American Volcanic Arc. To the southeast end of the volcanic arc, our preferred model shows a steep, coherent slab that extends up to the landward projection of the Panama Fracture Zone. Overall, a gradual change in the depth of the intraplate seismicity is observed, reaching 220 km in the northwestern part, and becoming progressively shallower toward the southeast, where it reaches a terminal depth of 75 km. The changes in the terminal depth of the observed seismicity correlate with the increased density in the modeled slab. The absence of intermediate depth intraplate seismicity in the southeastern section and the higher densities for the subducted slab in this area, support a model in which dehydration reactions in the subducted slab cease at a shallower depth, originating an anhydrous and thus aseismic slab.
Dissertations / Theses on the topic "Heterogeneous oceanic data":
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Zambra, Matteo. "Méthodes IA multimodales dans des contextes d’observation océanographique et de surveillance maritime multi-capteurs hétérogènes." Electronic Thesis or Diss., Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2024. http://www.theses.fr/2024IMTA0391.
Abstract:
Cette thèse vise à étudier l’utilisation simultanée d’ensembles de données océaniques hétérogènes afin d’améliorer les performances des modèles prédictifs utilisés dans les domaines scientifiques et opérationnels pour la simulation et l’analyse de l’océan et du milieu marin. Deux études de cas distinctes ont été explorées au cours des travaux de thèse. La première étude se concentre sur l’estimation locale de la vitesse du vent à la surface de la mer à partir de mesures du paysage sonore sous-marin et de produits de modèles atmosphériques. La deuxième étude considère l’extension spatiale du problème et l’utilisation d’observations à différentes échelles et résolutions spatiales, depuis les pseudo-observations simulant des images satellites jusqu’aux séries temporelles mesurées par des infrastructures in-situ. Le thème récurrent de ces recherches est la multi-modalité des données introduites dans le modèle. En d’autres termes, dans quelle mesure et comment le modèle prédictif peut bénéficier de l’utilisation de canaux d’information spatio-temporels hétérogènes. L’outil méthodologique privilégié est un système de simulation basé sur l’assimilation variationnelle des données et les concepts d’apprentissage profondThe aim of this thesis is to study the simultaneous use of heterogeneous ocean datasets to improve the performance of predictive models used in scientific and operational fields for the simulation and analysis of the ocean and marine environment. Two distinct case studies were explored in the course of the thesis work. The first study focuses on the local estimation of wind speed at the sea surface from underwater soundscape measurements and atmospheric model products. The second study considers the spatial extension of the problem and the use of observations at different scales and spatial resolutions, from pseudo-observations simulating satellite images to time series measured by in-situ infrastructures. The recurring theme of these investigations is the multi-modality of the data fed into the model. That is, to what extent and how the predictive model can benefit from the use of spatio-temporally heterogeneous information channels. The preferred methodological tool is a simulation system based on variational data assimilation and deep learning concepts
Book chapters on the topic "Heterogeneous oceanic data":
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Sims, K. W. W., H. E. Newsom, and E. S. Gladney. "Chemical Fractionation During Formation Of The Earth’s Core And Continental Crust: Clues From As, Sb, W, And Mo." In Origin of the Earth, 291–317. Oxford University PressNew York, NY, 1990. http://dx.doi.org/10.1093/oso/9780195066197.003.0017.
Abstract:
Abstract We have analyzed suites of continental crustal rocks of different geologic ages, as well as midocean ridge and ocean island samples for As, Sb, W, and Mo, using radiochemical, thermal, and epithermal neutron activation analysis. The oceanic data show that Mo, As, and Sb have the same incompatible behavior as the light rare earth elements ( e.g., Ce) during igneous fractionation, while W behaves as a highly incompatible element and correlates with Ba The Mo/Ce ratio is the same in oceanic and crustal materials. However, crustal-derived materials, including Archean shales, appear to be enriched in As and Sb relative to Ce, and W relative to Ba, compared to the correlations in the oceanic rocks. A similar enrichment in crustal material has been previously observed for the element Pb. The suite of affected elements (Pb, As, Sb, and W) suggests that the enrichment is probably due to hydrothermal processes during crustal formation. The question of core formation through geologic time has been examined using Mo/Ce ratios; no significant change in this ratio has been observed in samples ranging from recent back to 3.8 Ga in age. The depletions of these siderophile elements relative to CI chondrites in the Earth’s primitive mantle ( silicate portion of the Earth) provide clues to the accretion and core formation history of the Earth. Our new depletion value for W differs significantly from the previous estimate based only on oceanic samples, and now overlaps the depletion of Co and Ni. The depletion of Mo is confirmed to be greater than that of Co and Ni, but less than that of the highly siderophile elements. The new data therefore provide additional support to the heterogeneous accretion theory, but are also consistent with the inefficient core formation theory.
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Alegret, Laia, Gabriela J. Arreguín-Rodríguez, and Ellen Thomas. "Oceanic productivity after the Cretaceous/Paleogene impact: Where do we stand? The view from the deep." In From the Guajira Desert to the Apennines, and from Mediterranean Microplates to the Mexican Killer Asteroid: Honoring the Career of Walter Alvarez. Geological Society of America, 2022. http://dx.doi.org/10.1130/2022.2557(21).
Abstract:
ABSTRACT More than four decades have passed since Walter Alvarez helped to bring mass extinctions to the attention of a broad audience and inspired extensive multidisciplinary research on a wide variety of topics ranging from the Cretaceous/Paleogene (K/Pg) and other impact events to astronomy, climate modeling, and the centuries-long debate on the extent to which apparent extinctions are a real phenomenon or due to incompleteness of the fossil record. Many questions about ecosystems in the aftermath of extinctions remain, and we summarize knowledge about an integral part of this discussion, i.e., oceanic productivity after the K/Pg mass extinction. We compiled new and published benthic foraminiferal data across the K/Pg boundary globally, at geographically and bathymetrically diverse sites, to contribute to the understanding of environmental consequences of the K/Pg impact through analysis of extinction patterns in Earth’s largest habitat: the deep seafloor. We find no significant links between the severity of extinction of benthic foraminiferal species or their global decrease in diversity and factors such as the distance from the Chicxulub crater, paleo-water depth, and paleolatitude. Benthic foraminiferal populations show strong post-impact variability in space and time, supporting the hypothesis of heterogeneous oceans with extensive, local-to-regional plankton blooms, but we suggest that the apparent geographic variability may at least in part be due to incompleteness of the geological record at high time resolution. Additional high-resolution studies are necessary to enable us to evaluate the rates of past extinctions and compare these to the rates of present and future extinctions.
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Vignudelli, Stefano, and Francesco De Biasio. "Coastal Sea Level Trends from a Joint Use of Satellite Radar Altimetry, GPS and Tide Gauges: Case Study of the Northern Adriatic Sea." In Geodetic Sciences - Theory, Applications and Recent Developments. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98243.
Abstract:
For the last century, tide gauges have been used to measure sea level change along the world’s coastline. However, tide gauges are heterogeneously distributed and sparse in coverage. The measured sea level changes are also affected by solid-Earth geophysics. Since 1992, satellite radar altimetry technique made possible to measure heights at sea independent of land changes. Recently various efforts started to improve the sea level record reprocessing past altimetry missions to create an almost 30 year-long combined record for sea level research studies. Moreover, coastal altimetry, i.e. the extension of altimetry into the oceanic coastal zone and its exploitation for looking at climate-scale variations of sea level, has had a steady progress in recent years and has become a recognized mission target for present and future satellite altimeters. Global sea level rise is today well acknowledged. On the opposite, the regional and local patterns are much more complicated to observe and explain. Sea level falls in some places and rises in others, as a consequence of natural cycles and anthropogenic causes. As relative sea level height continues to increase, many coastal cities can have the local elevation closer to the flooding line. It is evident that at land-sea interface a single technique is not enough to de-couple land and sea level changes. Satellite radar altimetry and tide gauges would coincide at coast if land had no vertical motion. By noting this fact, the difference of the two independent measurements is a proxy of land motion. In this chapter, we review recent advances in open ocean and coastal altimetry to measure sea level changes close to the coasts over the satellite radar altimetry era. The various methods to measure sea level trends are discussed, with focus on a more robust inverse method that has been tested in the Northern Adriatic Sea, where Global Positioning System (GPS) data are available to conduct a realistic assessment of uncertainties. The results show that the classical approach of estimating Vertical Land Motion (VLM) provides values that are almost half of those provided by the new Linear Inverse Problem With Constraints (LIPWC) method, in a new formulation which makes use of a change of variable (LIPWCCOV). Moreover, the accuracy of the new VLM estimates is lower when compared to the VLM estimated from GPS measurements. The experimental Sea Level Climate Change Initiative (SLCCI) data set (high resolution along track) coastal sea level product (developed within Climate Change Initiative (CCI project) that has been also assessed in the Gulf of Trieste show that the trends calculated with the gridded and along track datasets exhibit some differences, probably due to the different methodologies used in the generation of the products.
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Caselli, Graziella, and Sven Drefahl. "Future Mortality in Low Mortality Countries." In World Population & Human Capital in the Twenty-First Century. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198813422.003.0009.
Abstract:
This chapter provides an overview of past and expected future trends in life expectancy in populations with low levels of mortality. High and low mortality populations were separated on the basis of the level of child mortality in the year 2010 according to the revised estimates of the United Nations Inter-agency Group for Child Mortality Estimation (2011), with the threshold being 40 deaths per 1,000 children below the age of 5 years. The low mortality population is comprised of 132 countries including Europe, North America, most of Oceania and Latin America, large parts of Asia (excluding the high mortality area in Central and Southern Asia), and Northern Africa. The populations of these countries are already engaged in an advanced phase of the demographic and ‘epidemiologic transition’. Because they previously experienced strong decreases in infant mortality, the future mortality trends are driven mainly by mortality in adult ages, primarily the old and oldest-old. Although the data sources on which the existing estimates of life expectancy for these populations are based vary considerably (owing to differences in the death registration systems and the estimation techniques, see, e.g., Luy, 2010), we have relatively good knowledge of past and current mortality levels and trends and their causes. Despite the similar general trends, today’s low mortality countries are very heterogeneous in various aspects, including medical standards, access to health care, and behavioural risk factors, such as smoking prevalence. These diversities are strongly related to the populations’ stages of economic development and contribute to a broad variance of life expectancy levels. Among men, life expectancy at birth for the years 2005–10 ranges between 60.2 in Kazakhstan and 79.5 in Iceland. Among women, the range is between 67.8 in the Solomon Islands and 86.1 in Japan. To demonstrate this relationship between economic development and life expectancy we classified countries according to their current per capita income as an indicator of the economic development level of the populations. We used the World Bank classification, which groups countries into high income (≥$12,276 annually), upper middle income ($3,976–$12,275), lower middle income ($1,006–$3,975), and low income (≤$1,005).
Conference papers on the topic "Heterogeneous oceanic data":
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Pinto, Jose, Paulo Sousa Dias, Joao Borges Sousa, and Fernando L. Pereira. "Large scale data collection using networks of heterogeneous vehicles and sensors." In OCEANS 2009-EUROPE (OCEANS). IEEE, 2009. http://dx.doi.org/10.1109/oceanse.2009.5278239.
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VanMiddlesworth, Mark. "A heterogeneous rapid-turnaround visualization package for AUV data." In OCEANS 2011 - SPAIN. IEEE, 2011. http://dx.doi.org/10.1109/oceans-spain.2011.6003655.
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Rong, Tian, ChenXu Wang, QingHua Luo, and YingChun Li. "Underwater shipwreck target detection based on audio-visual heterogeneous data." In OCEANS 2023 - Limerick. IEEE, 2023. http://dx.doi.org/10.1109/oceanslimerick52467.2023.10244537.
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Camossi, Elena, Raffaele Grasso, Gabriele Ferri, Alessandro Faggiani, Kevin LePage, and Sandro Carniel. "Maritime Linked Data for Situational Awareness Heterogeneous Sensor Networks." In OCEANS 2021: San Diego – Porto. IEEE, 2021. http://dx.doi.org/10.23919/oceans44145.2021.9705759.
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Falchetti, Silvia, Alberto Alvarez, and Reiner Onken. "A relocatable EnKF ocean data assimilation tool for heterogeneous observational networks." In OCEANS 2015 - Genova. IEEE, 2015. http://dx.doi.org/10.1109/oceans-genova.2015.7271359.
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Zhou, Junwu, Hongchang He, Xiaolan Xie, and Ke Xu. "Research on Multi-source Heterogeneous Ocean Data Integration System." In DSIT 2020: 2020 3rd International Conference on Data Science and Information Technology. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3414274.3414503.
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Bagga, Pawandeep, Pradeep Shukla, and Chandrajyoti Chitroda. "Optimizing Completion Through Real-Time High-Resolution Resistivity Imaging Tool for Fracture Mapping in Horizontal Wells." In Offshore Technology Conference Asia. OTC, 2024. http://dx.doi.org/10.4043/34858-ms.
Abstract:
Abstract The Western Offshore Basin, stretching from Gujarat to Maharashtra along the western coast of India, is a geologically significant region. It covers a vast area of the Arabian Sea, transitioning from the continental shelf to deep oceanic waters. This basin holds substantial reserves of oil and natural gas, making it highly important for hydrocarbon exploration and production. In the pursuit of maximizing production rates and recovery efficiency, the petroleum industry recognizes the value of horizontal wells in this region. By drilling horizontally, these wells offer an effective solution for reducing the number of wells required to exploit a field, thanks to their extensive exposure to the reservoir. However, it is crucial to address the challenges associated with completing these wells to extend their operational lifespan. To optimize oil recovery and enhance well longevity, it is essential to complete horizontal wells with an appropriate number of Inflow Control Devices (ICDs) that possess suitable Flow Resistance Ratings (FRR). This configuration ensures the uniform distribution of flow along the horizontal section in highly permeable formations. It also helps manage early breakthrough at the heel in thin oil formations and delays water breakthrough in locations with high permeability in heterogeneous formations. The advent of advanced high-definition Logging-While-Drilling (LWD) electrical imaging services has revolutionized subsurface characterization during drilling operations. This state-of-the-art technology combines LWD measurements with high-resolution electrical imaging capabilities, providing unprecedented insights into the geological formations surrounding the wellbore. Real-time images enable the timely detection and mitigation of wellbore stability issues, such as drilling-induced tensile fractures and breakout. Additionally, real-time images facilitate sedimentary steering, enabling optimal placement of the wellbore within the formation. This paper aims to assess the advancements in high-definition logging-while-drilling electrical imaging tools. These tools acquire micro resistivity data around the entire circumference of the borehole while the bottomhole assembly (BHA) is rotating. The processed micro resistivity images obtained from LWD effectively reveal the presence of fractures, which are subsequently categorized into different zones to determine the optimal ICD completion based on fracture density. The high-definition images acquired using the LWD Electrical Image logging tool provide clear visualization of detailed fractures, vugs, and connected vugs.
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Sato, Takumi, Kangsoo Kim, Masahiko Sasano, Akihiro Okamoto, Shogo Inaba, Satoshi Kondo, Hiroshi Matsumoto, Takashi Murashima, Toshifumi Fujiwara, and Hiroyuki Osawa. "Sea Trials of Multiple Heterogenous Cruising AUVs and ASV With Basic Formation Control." In ASME 2023 42nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/omae2023-103370.
Abstract:
Abstract The National Maritime Research Institute (NMRI), in collaboration with the Japan Agency for Marine-Earth Science and Technology (JAMSTEC), is conducting research and development of seafloor observation technology using multiple autonomous underwater vehicles (AUVs) and one autonomous surface vehicle (ASV) under the 2nd SIP project “Innovative Technology for Deep Sea Resource Exploration.” A group of heterogeneous AUVs with different design concepts may have to be controlled when operating multiple AUVs simultaneously. In this study, we developed a basic formation control system that enables various AUV control with minimal software and hardware modifications to ASV and AUVs and successfully tested it in actual sea conditions. Four AUVs and one ASV from different manufacturers were used in the sea trials. The basic formation control system kept all AUVs within acoustic communication range and successfully acquired seafloor topographic data. The tests demonstrated the capability of basic formation control with heterogeneously navigated AUVs. This paper reports and summarizes the test results of those basic formation control tests.
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Jing, Liu, and Yue Lin. "Research on data interaction of multi-source heterogeneous information in ocean strategy environment." In 2017 IEEE 2nd International Conference on Big Data Analysis (ICBDA). IEEE, 2017. http://dx.doi.org/10.1109/icbda.2017.8078827.
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Myshkin, Vyacheslav F., Valery A. Khan, Dmitriy A. Izhoykin, Aygul K. Orazymbetova, Nyrzhamal A. Ospanovа, Aliya N. Kargulova, Vadim V. Dudorov, Denis L. Gamov, Vladimir N. Lensky, and Evgeniya S. Abramova. "Reduction of data processing error of heterogeneous system laser sensing." In XXIV International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, edited by Oleg A. Romanovskii and Gennadii G. Matvienko. SPIE, 2018. http://dx.doi.org/10.1117/12.2506127.
Reports on the topic "Heterogeneous oceanic data":
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Sommer, Stefan, Sascha Flögel, Michael Walter, and Frank Wenzhöfer. Autonomous Robotic Network to Resolve Coastal Oxygen Dynamics : Cruise No. AL547, 20.10. – 31.10.2020, Kiel – Kiel, ARCODYN. GEOMAR Helmholtz Centre for Ocean Research Kiel, 2022. http://dx.doi.org/10.3289/cr_al547.
Abstract:
The ALKOR cruise AL547 represents a concluding milestone of the Helmholtz innovation project ARCHES (Autonomous Robotic Networks to Help Modern Societies). The aim was to implement a heterogeneous robotic sensing network to simultaneously monitor changes in the water column and at the seafloor. The network has been developed by a consortium of partners from AWI, DLR, GEOMAR and the University of Kiel. The participating sensing platforms allow for real-time data transfer and the entire network shall be able to autonomously respond to environmental changes in the ocean. The network comprised seven different mobile and stationary platforms. Tests were conducted at the Mittelgrund working area in the entrance of the Eckernförde Bay (western Baltic Sea). During 47 stations the various sensing platforms were deployed and recovered for maintenance. A total of 87853 messages were sent using hydro-acoustics, of which 71734 messages contained O 2 data, 15177 were status messages, 926 messages were commands to trigger a change of the measurement behavior of a platform and 16 messages represented broadcasts about the environmental status. We synoptically recorded short-term O 2 time series on the different platforms, which were placed along a depth gradient in the working area. As the Eckernförde Bay is known for sporadic fish kills by anoxia we hope to contribute to a better understanding of the O 2 dynamics in coastal areas. - (ALKOR-Berichte ; AL547)