Dissertações em Oceanografia (Mestrado) - PPGOC/IG
URI Permanente para esta coleçãohttps://repositorio.ufpa.br/handle/2011/16440
Navegar
Navegando Dissertações em Oceanografia (Mestrado) - PPGOC/IG por Orientadores "ROSÁRIO, Renan Peixoto"
Agora exibindo 1 - 5 de 5
- Resultados por página
- Opções de Ordenação
Item Acesso aberto (Open Access) Aplicabilidade de um sistema de baixo custo para o monitoramento de dados meteoceanográficos na zona costeira Amazônica(Universidade Federal do Pará, 2025-04-23) SOTÃO, Daniel da Silva; ROSÁRIO, Renan Peixoto; http://lattes.cnpq.br/8003860457518342; https://orcid.org/0000-0003-2913-0514This study aimed to develop, implement, and validate a low-cost Continuous Monitoring Prototype (CMP) to collect meteoceanographic data in the Amazon Coastal Zone (ACZ), a region vulnerable to climate change and lacking environmental data. The system, built with an ESP32 microcontroller, integrates sensors for air temperature and relative humidity (HDC1080 and AM2302), atmospheric pressure (BMP280 and MS5611), water temperature (DS18B20), tide level (HC-SR04), precipitation, and wind speed and direction. Sensor validation was performed by comparing the collected data with reference equipment: a CICLUS PRO weather station (CWS) and a Sonlist Levelogger 5 LTC recorder (CTDlog). The CMP conducted four joint test campaigns with the CWS and CTDlog, totaling 56,221 records. Linear regression was applied to develop calibration equations for each sensor. Calibration quality was assessed using the coefficient of determination (R²), root mean square error (RMSE), Pearson correlation coefficient, and residual analysis. The HDC1080 and AM2302 sensors showed excellent performance for temperature measurement, with R² > 0.9, RMSE < 0.2 °C, mean absolute residual (MAE) < 0.12 °C, and very strong Pearson correlation (r ≥ 0.9). However, they exhibited instability in relative humidity measurements (R² ≈ 0.64; RMSE ≈ 3.46%; MAE ≈ 2.52%). The performance of the BMP280 and MS5611 pressure sensors was initially affected by internal heating, but after thermal compensation, they achieved R² values between 0.88 and 0.99, RMSE from 0.17 to 0.45 hPa, and MAE from 0.11 to 0.34 hPa, with the BMP280 showing superior performance. The DS18B20 water temperature sensor showed very strong correlation, with R² ≈ 0.94, RMSE ≈ 0.036 °C, and MAE ≈ 0.021 °C, proving highly promising. The HCSR04 sensor stood out as the most accurate, with R² ≈ 0.99, RMSE ≈ 2.6 cm, and MAE ≈ 1.9 cm. Precipitation and wind sensors presented inconsistencies and require further testing. The total production cost of the CMP was BRL 952.75, representing savings of 86.19% compared to the CWS (BRL 6,897.00) and 96.14% compared to the CTDlog (BRL 24,677.29). When compared to equivalent equipment, the CMP achieved at least 66.33% cost reduction compared to basic stations and 87.3% compared to lower-cost temperature and water level recorders. The CMP proved to be a viable, economical, and replicable solution for continuous environmental monitoring in the ACZ, with the potential to fill existing gaps in observation networks, although improvements are still needed to enhance its long-term performance.Item Acesso aberto (Open Access) Compreendendo as percepções sobre os potenciais impactos das mudanças climáticas em comunidades costeiras: um estudo de caso na área marinha protegida de Soure, costa amazônica brasileira(Universidade Federal do Pará, 2024-04-24) WANDSCHEER, Jéssica Yamila Leiva; ROSÁRIO, Renan Peixoto; http://lattes.cnpq.br/8003860457518342; https://orcid.org/0000-0003-2913-0514The study explores the perceptions of RESEX Soure communities regarding climate change, examining the complex relationships between these coastal communities and environmental changes. The research employed a structured questionnaire administered to 288 participants, representing 20% of the registered beneficiaries of the unit (Icmbio, 2018). The data collected included quantitative and qualitative insights on awareness, perceived impacts, and adaptation to climate change. The results reveal that 95.14% of respondents have a monthly income of up to one minimum wage (R$ 1,100 in 2021), reflecting the community's economic vulnerability. Regarding education, 61.46% have completed primary school, while only 2.08% have tertiary education. Most participants (58%) were born and continue to reside in the RESEX, relying heavily on extractive activities such as fishing, shellfish collection, and crab harvesting. Respondents reported noticeable environmental changes, including rising temperatures (73%), shifts in rainfall patterns (68%), and biodiversity loss (65%). These changes directly impact livelihoods, particularly fishing, which was identified as the main economic activity by 70% of participants. Additionally, 85% highlighted the importance of public policies and educational programs focused on mitigating climate impacts as critical to community adaptation efforts. While focused on RESEX Soure, the study emphasizes the importance of integrating local knowledge into broader climate adaptation strategies. The findings underscore the need for participatory approaches, scientifically informed and tailored to local realities, to ensure the effectiveness of public policies and enhance the resilience of coastal communities.Item Acesso aberto (Open Access) Detecção das mudanças costeiras na margem leste do estuário do Rio Pará: uma análise multitemporal (1987-2019) utilizando sensoriamento remoto.(Universidade Federal do Pará, 2022-05-24) GUIMARÃES, Diandra Karina Martins; EL-ROBRINI, Maâmar; http://lattes.cnpq.br/5707365981163429; https://orcid.org/0000-0001-7850-1217; ROSÁRIO, Renan Peixoto; http://lattes.cnpq.br/8003860457518342; https://orcid.org/0000-0003-2913-0514In the Coastal and Estuarine Zone of Pará (ZCEP) occurs a complex dynamics influenced by meteorological forces (rainfall, winds, extreme events), fluvial (flow) and marine (tides, currents, waves). The forcings affect the coastline (CL) of the estuaries margins causing changes that depend on the degree of exposure of the area and the intensity of the forcings. Therefore, the detection of the places that happen the processes of erosion and/or accretion of the coastline becomes interesting to observe the changes in the surroundings of the islands and municipalities of the eastern margin of the Pará River Estuary. The work area is located on the eastern margin of the Pará river estuary, in the section: Mosqueiro island, Santo Antônio do Tauá, Colares island (edge of the middle estuary), Vigia and São Caetano de Odivelas (edge of the lower estuary). To achieve the results, LANDSAT satellite images were acquired (1987; 1993; 1999; 2004; 2008; 2013 and 2019) and the Digital Shoreline Analysis System (DSAS) was used to more accurately identify and calculate the rates of variation of changes in erosion and accretion areas in the LC. NSM, LRR and EPR parameters were applied on the east margin of the Pará river estuary (117 km) in the 32-year period of analysis, with a total of 1130 transects generated. In the middle estuary, the tendency to erosion was higher, predominating in Mosqueiro Island with an average erosion rate of -38m and an average accretion rate of 22.97m, related to the average rates of variation of -0.58m/year (EPR) and -0.54m/year (LRR) and in Santo Antônio do Tauá with LRR and EPR parameters identifying average rates of change of -1.67m/year (LRR) and -1.55m/year (EPR). Only on the Colares island there was a tendency to accretion, with an average erosion rate of -96.29m and an average accretion rate of 116.49m, where the maximum accretion and erosion rates are 405.61m and -396.87m, respectively. While in the lower estuary there was a greater tendency to accretion, where in Vigia there was an average rate of change of 1.26 m/year and a maximum rate of accretion of 10.06 m/year in the EPR, and an average rate of change of 0.64 m/year and maximum accretion rate of 7.22 in the LRR. In São Caetano de Odivelas, the average rate of change in the EPR parameter was 0.40 m/year and in the LRR parameter it was 0.25 m/year and in the NSM it was 13.09 m. Comparing the margins of the Estuary, the east margin is under the influence of a low hydrodynamics, while the west margin is under a high hydrodynamics where erosion predominates, demonstrating that in the same estuary the processes occur in a different way, where the areas of high erosion are related to the morphology of the site and location of the area being more exposed to forcing.Item Acesso aberto (Open Access) Monitoramento meteorológico e hidrodinâmico de um ambiente lêntico em uma região metropolitana amazônica(Universidade Federal do Pará, 2025-04-25) GOMES, João Vitor da Silva; ROSÁRIO, Renan Peixoto; http://lattes.cnpq.br/8003860457518342; https://orcid.org/0000-0003-2913-0514The increasing urbanization and the resulting pressure on water resources have intensified the need to monitor and manage aquatic ecosystems. The Utinga State Park, located in Belém, Pará, is home to an important lake that plays a crucial role in supplying water to the region. However, the lack of urban planning and the disorderly population growth have jeopardized both the quality and quantity of this water resource. In light of this scenario, the present study aimed to evaluate the hydrodynamic and meteorological conditions of Água Preta Lake, with the goal of contributing to its conservation and sustainable management. Meteorological parameters were measured using a weather station over a 12-month period, with data made available at 60- minute intervals. Hydrodynamic data were collected using instruments such as the ADCP, which measures current intensity and direction at 50 cm intervals along the water column; an electromagnetic current meter, used for 48-hour measurements during both dry and rainy seasons to validate the lake's hydrodynamic patterns; and a CTD profiler, which measured the vertical temperature profile. Additionally, levelogger pressure sensors were deployed at strategic locations. After analysis, it was found that the lake's current velocity is low. Meteorological factors remained within the ranges reported by other authors, confirming the consistency of the collected data with previous studies. The hydrodynamic analysis revealed restricted circulation patterns, with limited water movement, especially near the bottom. The main driving force of the system is the operation of pumps that supply the lake with water from the Guamá River. Surface water movement is also limited, as wind speeds are low, hindering circulation in this environment. These results highlight the importance of continuous monitoring for the efficient management of the lake, especially in the context of growing environmental pressure caused by unplanned urbanization. The information obtained provides a solid foundation for future conservation actions, contributing to the preservation of biodiversity and the sustainability of the region's water supply.Item Acesso aberto (Open Access) Variação interanual e sazonal das massas d’água sobre a Plataforma Continental Norte do Brasil(Universidade Federal do Pará, 2021-12-20) MEDEIROS, Paula Renata Lobato de; ROSÁRIO, Renan Peixoto; http://lattes.cnpq.br/8003860457518342; https://orcid.org/0000-0003-2913-0514This study aimed to analyze the spatial and temporal variability of water masses over the Northern Continental Shelf of Brazil (PCNB), relating it to local dynamics and freshwater inputs. The PCNB extends from Cape Orange to the Bay of São Marcos and is characterized as highly energetic, due to the combined action of the north current of Brazil (CNB), trade winds, waves, tides and the water discharge from the Amazon rivers and Pará. Temperature, salinity and density data for the interannual analysis were obtained from the Brazilian Navy's national database (BNDO), during six oceanographic cruises: Amasseds I, II and III, North Ocean I, MCT VII and CBO in different years: 1989, 1990, 2001, 2016 and for the seasonal analysis, five months of the Costa Norte Project were used: March, July, November, December 2018 and January 2019. The TS parameters were intended to characterize and identify the water masses that occurred on the platform over the years, as well as observe the existing interannual and seasonal variability. The PCNB showed large variations in TS over the years and periods analyzed, and it is possible to observe the occurrence of four types of water bodies interannually: Pluma Estuarina (PE), Coastal Water (AC), Central Water of the South Atlantic (ACAS) and Tropical Water (AT) and seasonally, five water bodies were identified as occurring: AF (front water), AC, AT, ACAS and Pluma etuarina (PE). From the analysis of the TS diagrams it was possible to identify a thermohaline index for the estuarine plume and its metrics over time, where it occurred in March - 2018 and January - 2019, and their respective thermohaline indices were 27.5 °C to 28 °C and 0 g/kg to 33 g/kg.