Luiz Landau

Luiz Landau
Federal University of Rio de Janeiro | UFRJ

About

173
Publications
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653
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Publications

Publications (173)
Article
The onshore generation of wind and solar energy is a reality in Brazil. There are approximately 700 projects generating wind energy in the Northeast and South regions and 4000 generating solar energy distributed throughout the country. In addition, Brazil has an extensive Exclusive Economic Zone (EEZ) and a very diverse climate, which can contribut...
Article
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Forest fires have global, regional, and local socioeconomic and environmental consequences, with negative effects on ecosystem services, air quality, population health, and other relevant aspects, emphasizing their significance in the context of the United Nations Sustainable Development Goals. The study identified areas in the Rio de Janeiro State...
Article
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Sea-surface petroleum pollution is observed as “oil slicks” (i.e., “oil spills” or “oil seeps”) and can be confused with “look-alike slicks” (i.e., environmental phenomena, such as low-wind speed, upwelling conditions, chlorophyll, etc.) in synthetic aperture radar (SAR) measurements, the most proficient satellite sensor to detect mineral oil on th...
Preprint
Isotopic methods have become an important tool in the study of natural processes and countless applications have proven valuable in several research areas. Geologically, Strontium and Nd isotopic compositions present variations that reflect changes in the geological sources of these elements due to smaller degrees of isotope fractionation than stab...
Article
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Ilha Grande Bay is located in Angra dos Reis, Rio de Janeiro State, Brazil. The area is characterized by different land cover, complex topography and proximity to the Atlantic Ocean. These aspects make it susceptible to thermally and dynamically induced atmospheric circulations such as those associated with valley/mountain and land/sea breeze syste...
Article
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Linear discriminant analysis (LDA) is a mathematically robust multivariate data analysis approach that is sometimes used for surface oil slick signature classification. Our goal is to rank the effectiveness of LDAs to differentiate oil spills from look-alike slicks. We explored multiple combinations of (i) variables (size information, Meteorologica...
Article
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Coastal ocean observing and modeling systems (coastal observatories), connected with regional and global ocean systems, improve the quality of information and forecasts for effective management of safe and sustainable maritime activities. The public availability of systematic and long-term information of the ocean is an engine for the Blue Economy,...
Article
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Migration deconvolution is an image domain approach to least-squares migration, which is considered the state-of-the-art algorithm for obtaining seismic reflectivity models of the earth from seismic acquisition results. Seismic imaging is an active research field with the development over the last few years of several techniques that have mitigated...
Article
Least-squares migration (LSM) is an effective technique for mitigating blurring effects and migration artifacts generated by the limited data frequency bandwidth, incomplete coverage of geometry, source signature, and unbalanced amplitudes caused by complex wavefield propagation in the subsurface. Migration deconvolution (MD) is an image-domain app...
Article
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In the context of the naturally occurring radioactive material associated with petrol exploitation, it is important to determine the concentrations of 226Ra and 228Ra in contaminated sludge originated from this activity and stored in packages. Although measurements based on chemical analyses of samples from package content can be done, difficulties...
Technical Report
https://www.epe.gov.br/sites-pt/publicacoes-dados-abertos/publicacoes/PublishingImages/Paginas/Forms/Publicaes/EAAS%20Solim%c3%b5es%20-%20vers%c3%a3o%20completa.pdf
Article
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We classify low-backscatter regions observed in Synthetic Aperture Radar (SAR) measurements of the surface of the ocean as either oil slicks or look-alike slicks (radar false targets). Our proposed classification algorithm is based on Linear Discriminant Analyses (LDAs) of RADARSAT-1 measurements (402 scenes off the southeast coast of Brazil from J...
Article
The purpose of this study is to evaluate the main aspects of the mesoscale ocean circulation of the Brazilian Equatorial Margin using a ten-year hydrodynamic hindcast that successfully represented in situ and satellite observational data. The seasonality and distribution of the Amazon River Plume (ARP), as well as the volume transport of the North...
Article
Within the Costa Norte R&D Project, a hydrodynamic climatology was constructed for the Brazilian equatorial margin. The strong incremental constraint approach of the 4DVAR scheme inserted in the Regional Ocean Modeling System was used and applied to the initial, ocean boundary, and atmospheric forcing conditions. In situ data of temperature and sal...
Presentation
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This work was presented at the Computational Engineering and Science Conference on May 7th, 2020 and it is part of my doctoral dissertation.
Book
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This is a reprint of articles from the Special Issue published online in the open access journal Energies (ISSN 1996-1073) from 2018 to 2019 (available at: https://www.mdpi.com/journal/energies/special issues/marine).
Article
The paper presents an assessment of the technical potential of the offshore wind resources of the Southeast and South regions along the Brazilian coastline using atmospheric reanalysis databases. At first, three atmospheric reanalysis databases, CFSv2, ERA5 and MERRA2, are validated using measured data provided by the PNBOIA program. Afterwards, to...
Article
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This study, firstly, provides an up-to-date global review of the potential, technologies, prototypes, installed capacities, and projects related to ocean renewable energy including wave, tidal, and thermal, and salinity gradient sources. Secondly, as a case study, we present a preliminary assessment of the wave, ocean current, and thermal gradient...
Article
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The impact of Sea Surface Temperature (SST) on the wind and air temperature numerical simulations over the coastal region of the state of Rio de Janeiro, Brazil, was investigated using the Weather Research and Forecasting (WRF) model. The study period comprised January 24–26, 2014, characterized by the occurrence of coastal upwelling. Two numerical...
Article
This study aims to evaluate the potential changes to the strength of the North Pacific Current (NPC) and its position of divergence, which would alter the variability of the Alaska (AC) and California (CC) currents throughout the century. For this, the volume transports of these currents were evaluated using the historical CMIP5 and RCP4.5 experime...
Article
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A novel empirical approach to categorize oil slicks’ sea surface expressions in synthetic aperture radar (SAR) measurements into oil seeps or oil spills is investigated, contributing both to academic remote sensing research and to practical applications for the petroleum industry. We use linear discriminant analysis (LDA) to try accuracy improvemen...
Chapter
The growth of the activities of the Petroleum Industry in the Brazilian Equatorial Margin, reinforces the need for the environmental knowledge of the region, which will be potentially exposed to risks related to such activities. The environmental importance of this region evidences the need to deepen and systematize not only the knowledge about the...
Chapter
Full-text available
An atmospheric and marine computational forecasting system for Guanabara Bay (GB) was developed to support the Brazilian Sailing Teams in the 2016 Olympic and Paralympic Games. This system, operational since August 2014, is composed of the Weather Research and Forecasting (WRF) and the Regional Ocean Modeling System (ROMS) models, which are both ex...
Article
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Our research focuses on refining the ability to discriminate two petrogenic oil-slick categories: the sea surface expression of naturally-occurring oil seeps and man-made oil spills. For that, a long-term RADARSAT-2 dataset (244 scenes imaged between 2008 and 2012) is analyzed to investigate oil slicks (4562) observed in the Gulf of Mexico (Campech...
Article
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Industrial accidents pose risks to the entire environment located in the area of influence of the enterprises, especially when they are affected by the atmospheric dispersion of pollutants emitted, as in the case of a nuclear power plant, where the concern with the evacuation of the population is the main priority in critical situations, which rein...
Article
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The Angra dos Reis nuclear power complex, on the southern coast of the state of Rio de Janeiro, has in its geographic space different aspects that integrate the environmental dynamics of its area of influence, where geological, meteorological and demographic factors characterize the region as an environment complex, especially with the projection o...
Conference Paper
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Os processos de dinâmica costeira, tais como erosão, transporte e deposição de sedimentos, podem ser estudados através de imagens de satélite de resoluções espaciais moderadas. Neste sentido, o mapeamento das feições submersas, a partir de imagens de satélite, vem se tornando, cada dia mais, um importante aliado neste conhecimento, sobretudo por se...
Article
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Changes in the regional hydrodynamics of the region of the South Atlantic near the east coast of Brazil were evaluated from the beginning to the end of the century. The analysis was based on the anomalies from two downscaling experiments using the HadGEM2-ES outputs for the historical and RCP4.5 runs from the Coupled Model Inter-comparison Project...
Article
Coastal environments are highly dynamic and sensitive to interference and variations caused by the numerous natural and anthropogenic agents. The northern coast of Northeastern Brazil has undergone intense erosion in recent years. However, the construction of the Pecém Port modified the beach and shoreline features differently from the adjacent are...
Article
Full-text available
The spatial and temporal variability of energy exchange in Tropical Instability Waves (TIWs) in the Atlantic Ocean were investigated. A spectral analysis was used to filter the 5-day mean results from Simple Ocean Data Assimilation (SODA) reanalysis spanning from 1958 to 2008. TIWs were filtered over periods of 15 to 60 days and between wavelengths...
Article
Full-text available
Full waveform inversion (FWI) is traditionally designed as an iterative non-linear optimization problem. Thus, it is subject to scaling problems due to inappropriate choice of model parametrization. It is well known that the conventional gradient-based direction update of the parameters, although widely reported and used, does not have the correct...
Article
A marine wind field extraction methodology that produced results with 1.5 × 1.5 km of spatial resolution using RADARSAT-2 wide and ScanSAR narrow acquisition modes was applied over the Gulf of Mexico. Bootstrap method with median values was applied on the spatial resampling step and showed to be efficient to eliminate extreme σ <sub xmlns:mml="http...
Article
This paper presents a study on the use of industrial internet of things (IIoT), the use of IIot in the current Brazilian industry context, its basic differences from internet of things (IoT) and its expansion possibilities pointing out some challenges related to a new approach within the industry. The complex interconnection which is made possible...
Article
It is important to understand the Solimões River seasonal hydrological cycle and its dynamics to support systematic environmental monitoring efforts in the Amazon region. These are essential to the contingency response to possible accidents in the existing oil transportation network. This study seeks to map the environmental sensitivity to oil spil...
Article
Full-text available
The spatial and temporal variability of energy exchange in Tropical Instability Waves (TIWs) in the Atlantic Ocean were investigated. A spectral analysis was used to filter the 5-day mean results from Simple Ocean Data Assimilation reanalysis spanning from 1958 to 2008. TIWs were filtered over periods of 15 to 60 days and between wavelengths of 4 a...
Conference Paper
Full-text available
Coastal environments are highly dynamic and sensitive to interference and variations caused by the numerous natural and anthropogenic agents. The anthropogenic agents can cause changes in the pattern of propagation of waves and currents, and interfere with the availability and mobility of sediments. Tides, waves, currents and wind can cause morphod...
Article
Full-text available
This study focuses on the surroundings of the Urucu oil and gas province and the adjoining Solimões terminal in the Amazon region of Brazil, which is of great global importance due to its biodiversity richness and freshwater resources. There are few results related to aliphatic hydrocarbons and polycyclic aromatic hydrocarbons (PAHs), and there are...
Conference Paper
New challenges and demands on software engineering education are presented by rapid changes and increased complexity of software systems. This paper presents the VisAr3D environment that has been developed as an innovative proposal to be introduced in the classroom to provide a 3D visualization of UML models. The user is invited to intuitively unde...
Article
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Campeche Bay, located in the Gulf of Mexico, is a well-established fossil fuel producing region, with numerous oil rigs exploring oil and natural gas. In an effort to reduce negative impacts on marine ecosystems, Pemex continuously monitored Campeche Bay for oil slicks, i.e. naturally occurring oil seeps and man-made oil spills. A long-term dataset...
Article
Aiming to achieve systematic ocean forecasting for the southeastern Brazilian coast, an incremental 4D-Var data assimilation system is applied to a regional ocean model focused mainly in the Santos Basin region. This implementation is performed within the scope of The Santos Basin Ocean Observing System (or Project Azul), a pilot project designed t...
Conference Paper
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The Finite Differences Method (FDM) is very popular in the acoustic wave modeling. However, the need to use of a very fine grid or a small sampling interval to improve the accuracy may increase the computational cost. An alternative employed in literature is to use optimized operators combined with the high FDM orders in order to infer a better pre...
Article
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This study evaluates how climate change might affect advective heat and volume transports in the South Atlantic Basin based on Intergovernmental Panel on Climate Change (IPCC) A1FI and B1 climate change scenarios projections. Using the Climatic Model 2.1 (CM2.1) results that were developed by the Geophysical Fluid Dynamics Laboratory (GFDL), integr...
Article
Full-text available
The knowledge of wind stress variability could represent an important contribution to understand the variability over upper layer ocean volume transports. The South Brazilian Bight (SBB) circulation had been studied by numerous researchers who predominantly attempted to estimate its meridional volume transport. The main objective and contribution o...
Article
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El objetivo del actual trabajo es definir de forma preliminar los grupos que componen la Corteza Laterítico Niquelíferas Cobaltíferas del Yacimiento Punta Gorda en Cuba, mediante redes neuronales aplicadas a un conjunto de registros radioactivos de pozo de acuerdo a una clasificación geológica previamente determinada. Se realiza además la evaluació...
Conference Paper
The Santos Basin region is located in the southeast part of Brazilian offshore region and contains the most important presalt oil reservoirs. The oceanographic knowledge of this region is very important for the future challenges related with oil exploration and production. The Ocean Observing System for Santos Basin also known as Blue Project start...
Data
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Resumo. A simulação numérica de escoamentos bifásicos de fluidos não-newtonianos e imiscíveis através de meios porosos rígidos é apresentada. O modelo de lei das potências é empregado para descrever as características reológicas do escoamento dos fluidos não-newtonianos. As equações governantes são aproximadas pelo método dos elementos finitos e um...
Article
The beginning of 2013 will mark the start for the Project BLUE, one of the greatest efforts in operational oceanography ever proposed in Brazil. The region of interest is located in the continental shelf break between Cabo Frio (23°S) and Floriananópolis Island (28°S). The region is dominated by the Brazil Current system, formed by the Brazil Curre...
Article
Full-text available
This study aimed to describe the use of bendsensors to analyze the human body joints range of movement (ROM). To achieve this goal, we used a system integrating an electronic platform and bendsensors, which is able to capture frontal and sagittal planes movements. A program written in the Processing 1.2.1 language was developed to allow information...
Conference Paper
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Ocean and atmosphere dynamics of the Southern coast of Bahia have been studied within the Project Characterization and Monitoring Ecosystem for de Coastal region of the South Coast of Bahia among Belmonte, Canavieiras and Una cities with the aim of monitoring its environment. In the present article, we studied the influence the passage of the front...
Conference Paper
Full-text available
A aquisiçăo ou simulaçăo de dados sísmicos blended, termo introduzido por Berkhout (2008), consiste da geraçăo de ondas sísmicas em várias posiçőes em intervalos de tempo menores que a duraçăo do registro do dado sísmico. Esse intervalo de tempo pequeno entre tiros consecutivos resulta na superposiçăo dos sinais, causando interferęncia no dado regi...
Conference Paper
This paper presents the results of applying Reverse Time Migration using different imaging conditions and the concept of blended seismic data. Imaging conditions are based on previous article of Kaelin and Guitton (2006) that was extended to compare the images from blended seismic data with images from conventional seismic data. In general, the res...
Conference Paper
Full-text available
RESUMO: As Ondas de Instabilidade Tropical (OITs) são reconhecidamente um fenômeno sazonal dos oceanos equatoriais e de forte influência nos padrões de temperatura da superfície do mar. O fluxo de calor associado às OITs vem sendo estudado, no entanto, estes são limitados devido à metodologia aplicada para a filtragem do sinal das ondas. Neste trab...
Conference Paper
Full-text available
Energética das Ondas de Instabilidade Tropical no Oceano Atlântico a partir 1 das reanálises SODA 2 Título breve: Energética das Ondas de Instabilidade Tropical 3 Abstract – Tropical Instability Waves (TIWs) energetics is studied using the 51 4 years results os Simple Ocean Data Assimilation (SODA) ocean reanalisys. 5 TIWs were filtered out from ti...