Rede Climatológica De Mesoescala Aplicada Ao Estudo Da Ilha De Calor Urbano: O Caso De Aracaju-Se

Abstract

RESUMOEste estudo avalia a Ilha de Calor Urbana (ICU) em Aracaju com base numa Rede Climatológica Urbana (RCU). Esta rede seguiu princípios e conceitos definidos para as áreas urbanas, particularmente no que concerne às questões relacionadas às escalas climáticas, à exposição dos equipamentos, à morfologia urbana e aos metadados. Os presentes resultados atualizaram a intensidade da ICU de Aracaju confrontando a tendência encontrada nos estudos iniciais. Embora, observou-se a máxima intensidade da ICU de 5,5°C, em termos médios a ICU tanto diurna como noturna não foi expressiva (entorno de 0,5ºC) refletindo um predomínio de intensidades baixas (diferenças térmicas de até 2ºC), cujas frequências superaram os 85% ao longo do ano. A RCU ajudou compreender melhor o impacto da ICU no ambiente disponibilizando informações climáticas úteis no planejamento da cidade. Palavras-chave:Rede climatológica Urbana; Ilha de Calor Urbana; Clima Urbano; Aracaju. URBANCLIMATOLOGICAL NETWORK APPLIED TO HEAT ISLAND STUDY IN ARACAJU-SE ABSTRACTThis study evaluated the Urban Heat Island (UHI) in Aracaju based on Urban Climatological Network (UCN). This network observed principles and concepts defined for urban areas, particularly concerning matters that relate to climatic scales, sitting and exposure, urban morphology and metadata. The current findings updated UHI's intensities Aracaju refuting the trend found out in previous studies. Although, it was observed maximum intensity of UHI up to 5,5 ºC, both daytime and nighttime UHI was not significant in average terms (about at 0,5ºC) reflecting the prevalence of low intensities (thermal difference up to 2ºC) whose frequencies exceeded 85% annually. UCN helped to understand better the UHI's impacts on environmental providing climatic information useful to urban planning.

Urban Heat Island and Park Cool Island Intensities in the Coastal City of Aracaju, North-Eastern Brazil

“…In Aracaju, using the approaches discussed above, some studies pointed to higher heating in the central areas (up to 7.5 • C) in relation to the peri-urban areas and green spaces, which suggests that UHI intensities are equally significant [10][11][12]. Anjos and Lopes [13] used a mesoscale climatological network (2 year daily data) to report that UHI intensities (both daytime and nighttime) in Aracaju were not significant (average of 0.5 • C) reflecting the prevalence of low intensities (thermal difference up to 2 • C) whose frequencies exceeded 85% annually thus refuting the trend found in previous studies.…”

Surface Urban Heat Island in Middle City: Spatial and Temporal Characteristics

“…The SUHI, on average, occupied an area of 52.6 km 2 , which means six times the area occupied by the SUFI (8.5 km 2 ). This finding highlights a problem observed in several Brazilian cities: the lack of urban planning considering microclimate as a factor for spatial planning [19,23,[74][75][76]. Most SUFIs are located near watercourses, parks, slopes and valley bottoms ( Figure 5), revealing the effects of green areas and relief on SUHI intensity.…”

Sea Breeze Front and Outdoor Thermal Comfort during Summer in Northeastern Brazil

“…Anjos and Lopes [5] previously reported the SBF development over the study area in summer 2015 due to the intensity of the thermal gradient between continent and ocean. Air temperature data were extracted from a field campaign conducted by Anjos and Lopes [43] and Anjos et al [44] to evaluate the UHI intensity in Aracaju. We selected six sensors with built-in data loggers and housed in a shield (HOBO U23 Pro v2 Temperature/Relative Humidity, Onset ® , EUA), that has an accuracy of ±0.21 • C in the range of 0 to +50.0 • C. All sensors were deployed on lampposts at 3.5 m above the ground.…”