A5043184397- Oceanographic and Atmospheric Processes
- Marine and coastal ecosystems
- Ocean Acidification Effects and Responses
- Marine and fisheries research
- Climate variability and models
- Atmospheric and Environmental Gas Dynamics
- Coral and Marine Ecosystems Studies
- Tropical and Extratropical Cyclones Research
- Coastal and Marine Management
- Marine Biology and Ecology Research
- Ocean Waves and Remote Sensing
- Geology and Paleoclimatology Research
- Marine and coastal plant biology
- Fish biology, ecology, and behavior
- Marine Bivalve and Aquaculture Studies
- Oil Spill Detection and Mitigation
- Maritime Transport Emissions and Efficiency
- Methane Hydrates and Related Phenomena
- Fish Ecology and Management Studies
- Marine and Offshore Engineering Studies
- Maritime Navigation and Safety
- Indoor Air Quality and Microbial Exposure
- Carbon Dioxide Capture Technologies
- Global Energy and Sustainability Research
- Geological and Geophysical Studies
Universidade Federal de Pernambuco
2015-2024
National Education and Research Network
2017-2018
Abstract The cross-wavelet transform (XWT) is a powerful tool for testing the proposed connections between two time series. Because of XWT’s skeletal structure, which based on wavelet transform, it suitable analysis nonstationary periodic signals. Recent work has shown that power spectrum can produce deviation, be corrected by choosing proper rectification scale. In this study, standard application XWT also lead to biased result. A version was constructed using scale each series as...
Abstract The western boundary current system off Brazil is a key region for diagnosing variations of the Atlantic meridional overturning circulation (AMOC) and southern subtropical cell. In July 2013 mooring array was installed coast at 11°S similar to an between 2000 2004 same location. Here we present results from two research cruises first 10.5 months moored observations in comparison decade ago. Average transports North Undercurrent Deep Western Boundary Current (DWBC) have not changed...
Tropical Atlantic (TA) Ocean-atmosphere interactions and their contributions to strong variability of rainfall along the Northeast Brazilian (NEB) coast were investigated for years 1974–2008. The core rainy seasons March-April June-July identified Fortaleza (northern NEB; NNEB) Recife (eastern ENEB), respectively. Lagged linear regressions between sea surface temperature (SST) pseudo wind stress (PWS) anomalies over entire TA at show that these regions is differentially influenced by...
The Amazon generates the world's largest offshore river plume, which covers extensive areas of tropical Atlantic. data and samples in this study were obtained during oceanographic cruise Camadas Finas III October 2012 along River-Ocean Continuum (AROC). occurred boreal autumn, when plume reaches its maximum eastward extent. In study, we examine links between physics, biogeochemistry plankton community structure AROC. Hydrographic results showed very different conditions, ranging from shallow...
At the mouth of Amazon River, a widespread carbonate ecosystem exists below river plume, generating hard-bottom reef (∼9500 km2) that includes mainly large sponges but also rhodolith beds. The mesozooplankton associated with pelagic realm over formation was characterized, considering estuarine plume and oceanic influence. Vertical hauls were carried out using standard plankton net 200 μm mesh size during September 2014. An indicator index applied to express species importance as ecological...
The seawater fugacity of CO 2 ( f ) has been monitored hourly at an instrumented mooring 6°S, 10°W since 2006. is located in the South Equatorial Current and affected by equatorial Atlantic cold tongue. This site characterized large seasonal sea surface temperature variations (>4°C). measured a spectrophotometric sensor deployed about 1.5 meters deep. Measurements , (SST) salinity (SSS) are used to calculate total dissolved inorganic carbon (TCO pH. Total alkalinity (TA) calculated...
ABSTRACT This study investigated how the extreme rainfall event over eastern Northeast Brazil (ENEB), occurring at end of May 2022, was induced dynamically using observational and reanalysis data. On a monthly time scale, wet‐spell condition found ENEB region in indicated by enhanced onshore‐ward moisture flux widely spreading positive precipitation anomaly. At shorter experienced continually intense rainy days from 21st to 28th peaking on 28th. Focusing most 28th, shallow vortex disturbance...
In this work, we aim to evaluate the feasibility and operational limitations of using Sentinel-1 synthetic aperture radar (SAR) data monitor water levels in Poço da Cruz reservoir from September 2016–September 2020, semi-arid region northeast Brazil. To segment water/non-water features, SAR backscattering thresholding was carried out via graphical interpretation backscatter coefficient histograms. addition, surrounding environmental effects on polarization thresholds were investigated by...
Abstract. High-resolution hydrographic observations of temperature and salinity are used to analyze the formation distribution isothermal depth (ZT), mixed (ZM) barrier layer thickness (BLT) in a section southwestern Atlantic (0°30´ N–14°00´ S; 31°24´–41°48´ W), adjacent northeastern Brazilian coast. Analyzed data consists 279 CTD casts acquired during two cruises under REVIZEE Program. One occurred late austral winter (August–October 1995) another summer (January–April 1997). Oceanic...
Pacific and Atlantic sea surface temperature (SST) variability strongly influences rainfall changes in the Amazon River basin, which impacts on river discharge consequently salinity (SSS) plume. An Empirical Orthogonal Function (EOF) analysis was performed using 46 years of SST, rainfall, SSS datasets, order to establish relationship between these variables. The first three modes SST/rainfall explained 87.83% total covariance. SSTs led basin events by four months. resultant western tropical...
Abstract In order to investigate intra‐ and inter‐annual variability of North Brazil Current (NBC) rings, angular momentum eddy detection tracking algorithm (AMEDA) was used for identification their occurrence, trajectories, parameters. Based on 24 years (1993–2016) geopotential height geostrophic current fields reanalysis data from ARMOR 3D (¼°), we identified an average rate five NBC rings shed by year. The present lifetime 15.3 (±5.4) weeks, speed‐based radius ( R max ) 139.8 (±23.6) km,...
Abstract The coupled ocean–atmosphere–wave–sediment transport model and the Weather Research Forecasting (WRF) atmospheric were used to simulate extreme rainfall events from 10 25 June 2010 in eastern Northeast Brazil (ENEB). simulations aimed at investigating improvements using a ocean–atmospheric of meteorological systems as ocean–atmosphere interactions intensified during period when flood occurred ENEB. In 2010, sea surface temperature (SST) was warmer than 28.5°C western tropical South...
Hourly fCO2 is recorded at a time series the PIRATA buoy located 6°S 10°W in eastern tropical Atlantic since June 2006. This site south and west of seasonal cold tongue affected by its propagation from to September. Using an alkalinity–salinity relationship determined for observed fCO2, pH inorganic carbon concentration are calculated. The investigated explore intraseasonal, interannual timescales these parameters, detect any long-term trends. At intraseasonal timescales, strongly...
Intraseasonal signals with periods of 2 to 3 weeks in near‐surface alongshore current measurements are detected from four moorings (K1–K4) deployed 2000 2004 at the 11°S section close Brazilian coast as part German CLIVAR Tropical Atlantic Variability Project. This crosses path North Brazil Undercurrent, most powerful western boundary South Ocean. We investigate origin this intraseasonal variability Undercurrent by relating oceanic oscillation currents its atmospheric counterpart, meridional...
Exploring the effects of meteo-oceanographic (MO) events on ships' maneuverability and safety has great potential, since most maritime accidents occur in confined waters, where speed ships is low, forces wind current have particular importance. Therefore, we put forward a methodology that will be used to qualify classify risks caused by MO factors how maneuver, dock or undock port. The objective generate important information for managing risk. validated illustrated step-by-step applying it...
Oceanographic features influence the early stages of fish to a high degree. We investigated continental shelf-slope gradient on ichthyoplankton composition and distribution off Northeastern Brazil. Two oceanographic campaigns were performed during July-August 2010 2012. The samplings along three transects composed by stations, covering shelf slope areas. Abiotic data obtained an ADCP CTD. was sampled through diurnal nocturnal hauls using 500-µm bongo net from 200 m surface. A total 1634...
The carbon dioxide flux through the air-water interface of coastal freshwater ecosystems must be quantified to understand regional balances and its transport estuarine regions. variations in air-sea CO2 fluxes nearshore can caused by variable influence rivers. In present study, amount emitted from a tropical river was estimated using climatological biogeochemical measurements (2002-2010) obtained basin Capibaribe River, which is located most populous industrialized area northeast region...