scholarly journals Clima urbano: episódios de inverno e primavera em Rio Verde-GO

2021 ◽  
Vol 14 (6) ◽  
pp. 3316
Author(s):  
Fernando Santiago do Prado ◽  
Márcia Cristina da Cunha ◽  
Regina Maria Lopes
Keyword(s):  
Land Use ◽  
Relative Humidity ◽  
Physical Environment ◽  
Urban Climate ◽  
Surface Characteristics ◽  
Thermal Discomfort ◽  
Forested Areas ◽  
Temperature Records ◽  
Statistical Relationships ◽  
The City

A perda de áreas florestadas causa extremos climáticos, como picos de temperatura e quedas da umidade relativa do ar, comprometendo a qualidade ambiental. Em Rio Verde, Goiás, com a expansão da área urbana, áreas de floresta foram reduzidas, trazendo um desconforto térmico na população. Assim, o objetivo deste artigo foi estimar as variações de temperatura e umidade relativa do ar, em três pontos de coletas distintos na cidade de Rio Verde-GO, considerando-se as características da superfície (uso da terra, vegetação, relevo) durante os meses de julho (inverno) e outubro (primavera) de 2018. Para isso foram processadas relações entre as temperaturas (T) e umidade relativa (UR) do ar com as áreas (vegetada; construída/pavimento e solo exposto) num raio de 200 m entre os pontos de coletas. Com essas informações fundamentadas no estudo na Teoria do Clima Urbano, por meio do subsistema termodinâmico (relativo à temperatura e umidade relativa do ar) foram feitas relações estatísticas entre a variação dos atributos climáticos e observamos os parâmetros geográficos, tais como porcentagem de vegetação, área construída, solo exposto, e a atuação e dinâmica atmosférica da região no período analisado. Os resultados mostraram que os aspectos do meio físico dos pontos amostrais, principalmente a vegetação, contribuiu para a variação dos registros da temperatura do ar mínima (T. mín) e máxima (T. máx) absoluta , com oscilação de 1,4 a 2,5°C e 2,8 a 4°C, enquanto os valores da umidade relativa do ar mínima e máxima absoluta variaram de 0,6 a 11,6% e 2,2 a 5,4%, respectivamente.Urban climate: winter and spring episodes in Rio Verde-GOA B S T R A C TThe loss of forested areas causes climatic extremes, such as temperature peaks and drops in relative humidity, compromising environmental quality. In Rio Verde, Goiás, with the population growth and the expansion of the urban area, forest areas were decimated, bringing a thermal discomfort to the population. The objective of this article was to estimate the variations in temperature and relative humidity in three distinct collection points in the city of Rio Verde-GO, considering the surface characteristics (land use, vegetation, relief) during the months of July (winter) and October (spring) 2018. For this purpose, relationships between the temperatures (T) and relative humidity (RH) of the air were processed with the areas (vegetated; constructed/paved and exposed soil) within a radius of 200 m between the collection points. With this information based on the study in the Theory of Urban Climate, through the thermodynamic subsystem (relative to the temperature and relative humidity of the air), statistical relationships were made between the variation of climatic attributes and we observed the geographical parameters, such as percentage of vegetation, area constructed, exposed soil, and the performance and atmospheric dynamics of the region in the analyzed period. The results showed that the physical aspects of the sample points, mainly the vegetation, contributed to the variation of the minimum (T. min) and maximum (T. max) absolute air temperature records, with an oscillation of 1,4 to 2,5°C and 2,8 to 4°C, while the minimum and maximum absolute relative humidity values varied from 0,6 to 11,6% and 2,2 to 5,4%, respectively.Keywords: Urban climate, climatic attributes, physical environment, land use and occupation

scholarly journals Analysis of the urban heat island in representative points of the city of Bayeux / PB

2018 ◽  
Vol 7 (6) ◽  
pp. 345
Author(s):  
Amanda Mayara Paulino Da Silva
Keyword(s):  
Land Use ◽  
Urban Heat Island ◽  
Thermal Field ◽  
Urban Climate ◽  
Urban Heat Islands ◽  
Heat Island ◽  
Thermal Discomfort ◽  
Heat Islands ◽  
Urban Heat ◽  
The City

Abstrat Urban growth has generated several socio-environmental problems and has altered the quality of life of people living in these environments. Due to the disorderly growth of cities and the various forms of urban land use and occupation, changes in the thermal field of these areas have occurred and caused the formation of urban heat islands and thermal discomfort in urban environments. Thus, the need to understand the formation of heat islands in these areas and the study of their causes and consequences grows. Given this context, the present work intends to study the urban climate of the city of Bayeux / PB, specifically the urban thermal field, and the formation of heat islands. For the accomplishment of the research, initially a bibliographical survey of the subject in question was made. Subsequently experimental points of meteorological data collection (temperature and relative air humidity) were defined in the metropolitan area of the city of João Pessoa, specifically in the municipality of Bayeux / PB. These points were defined based on the different types of land use and cover in the study area. The following experimental points were defined: a point in the center of the city of Bayeux / PB, another point on the banks of the BR230 direction Bayeux, and a reference point in a remnant of Atlantic forest. To obtain the urban heat island the reference point was used as a parameter of the climatic conditions of a natural environment. The data of temperature and relative humidity were collected through thermometers (HOBO U-10), which were placed on steel tripods (1.5 meters high) and monitored at uninterrupted intervals of 1 and 1 hour during the dry period and rainy region. The analysis of the data points to the formation of urban heat islands in the two periods evaluated in the city of Bayeux / PB, being the center of the city, the most critical area with the most intense heat islands. The vegetative cover played a predominant role in the climatic mitigation of the experimental samples as well as the presence of precipitation. The areas with impermeable soil cover presented the largest heat islands and contributed to the thermal discomfort of the study area. Keywords: Urban Climate, Thermodynamic Field, Urban Heat Island.

First Policy, Then Action: A Co-Production Approach to Understand the Application of Urban Climate Knowledge in Land Use Planning

2019 ◽  
Vol 06 (03n04) ◽  
pp. 2050005
Author(s):  
Mariana Barreto Alfonso Fragomeni ◽  
Jennifer L. Rice ◽  
Rosanna G. Rivero ◽  
J. Marshall Shepherd
Keyword(s):  
Land Use ◽  
Urban Planning ◽  
Low Income ◽  
Land Use Planning ◽  
Urban Climate ◽  
The United States ◽  
Response Planning ◽  
Climate Knowledge ◽  
Heat Response ◽  
The City

Barriers to the application of climate science in land use planning are often understood as a problem related to perceived disciplinary knowledge gaps. This paper argues that, instead, limitations to the application of knowledge are not strictly linked to transference, but are also attributed to the thought processes that planners use to understand and use information. This study uses an interactional co-production framework from Science and Technology Studies (STS) to explore these processes in the context of heat response planning in Chatham County, Georgia, in the United States: a coastal county exposed to hot and humid conditions that render its population, particularly its growing elderly and low-income, vulnerable to heat health risks. We specifically focus on the processes used by planners during a heat response planning workshop, exploring the discussions and actions taken to develop a plan. We attempt to answer the following questions: What are the processes used by planners to respond to climatic issues such as heat vulnerability? How do these processes determine the application of the scientific knowledge produced? How does this process enable or limit the use of climate knowledge in decision making at the city scale? This paper argues that planners engage in three steps to determine the applicability of climate knowledge to urban planning: (1) using their own experiences to contextualize and visualize the information in their community, (2) being extremely cautious about the use of information because of a fear of failure, and (3) asking for specific policies to be in place to justify and legitimate actions and promote projects throughout the city. Using these insights, this paper concludes with some thoughts on how climate knowledge might be better integrated into urban planning.

scholarly journals Using urban climate modelling and improved land use classifications to support climate change adaptation in urban environments: A case study for the city of Klagenfurt, Austria

Urban Climate ◽  
2020 ◽  
Vol 31 ◽  
pp. 100582 ◽  
Author(s):  
Sandro M. Oswald ◽  
Brigitta Hollosi ◽  
Maja Žuvela-Aloise ◽  
Linda See ◽  
Stefan Guggenberger ◽  
...  
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Climate Change Adaptation ◽  
Urban Climate ◽  
Urban Environments ◽  
Climate Modelling ◽  
The City

scholarly journals AIR TEMPERATURE AND RELATIVE MOISTURE OSCILLATIONS IN RECIFE – PE

2019 ◽  
Vol 9 (1) ◽  
pp. 30
Author(s):  
Manoel Vieira De França ◽  
Romildo Morant de Holanda De Holanda ◽  
Raimundo Mainar De Medeiros
Keyword(s):  
Quality Of Life ◽  
Relative Humidity ◽  
Air Temperature ◽  
Large Scale ◽  
Statistical Parameters ◽  
Thermal Discomfort ◽  
Deviation Coefficient ◽  
Air Circulation ◽  
The City

The objective of this study was to study temperature variability and relative humidity, comparing the 1962-1990 and 1991-2016 periods with the averages of 1931-2016 and 1962-2016, respectively, with the aim of quantifying climate change and identifying the influence Of large-scale El Niño events, aiming to contribute to the managers responsible for urban planning and improving the quality of life of the inhabitants and the ecosystem. Air temperature and relative humidity data provided by the National Institute of Meteorology (INMET) were used. Basic statistical parameters were calculated as: mean, standard deviation, coefficient of variance, variations of annual anomalies in order to identify buoyancy in the data and the influence of extreme events. The city of Recife suffered from disorderly growth, with no specific patterns of planning in urbanization that caused variations in the microclimate of the urbis, causing thermal discomfort and reducing the quality of life of its inhabitants. There is intense flow of automotive vehicles and people throughout the day due to activities related to work, commerce and services, as well as the concentration of various buildings, waterproofed areas as well as buildings, making the local air circulation difficult. It is suggested an increase in green areas from the afforestation that has been shown as an alternative to improve the quality of life in urban spaces.

scholarly journals Effect of Vegetation Structure on Urban Climate Mitigation

2020 ◽  
Vol 23 (2) ◽  
pp. 60-65
Author(s):  
Zdenka Rózová ◽  
Ján Supuka ◽  
Ján Klein ◽  
Matej Jasenka ◽  
Attila Tóth ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Air Temperature ◽  
Temperature Difference ◽  
Urban Climate ◽  
Climate Mitigation ◽  
Wide Range ◽  
Street Space ◽  
Vegetation Stand ◽  
The City ◽  
City Park

AbstractVegetation formations are an important component in the urban structure, as they perform a wide range of ecosystem services there. The climate modification to improve the environmental and residential quality of the city is one of the important functions. The paper presents the results of the microclimate assessment in the chosen localities of Nitra town, Slovakia, with an emphasis on the stage and differences in air temperature and relative humidity. The climate elements were measured at 7 spatially different sites (sites A to G), each of them at two comparative sites, vegetation stand and open area. The largest average air temperature difference between the vegetation stand and the non-vegetation area was 1.2 °C at the locality D. The largest air temperature difference in the vegetation stands was measured between the street space (site E) and the city park (F), reaching 2.3–2.5 °C. The relative air humidity reached the highest differences between the park (locality F) and the street space (G) measured at 3:00–8:00. These reached 19.6% to 24.4% with higher relative humidity in the popular city park. The highest differences between the compared habitats were measured at locality G and averaged 9.6% at 04:00 – 07:00 in a preference to a tree canopy. The research results confirmed the importance of the vegetation structures in the process of mitigating the urban climate extremes and the environmental quality improving.

scholarly journals Variação Microclimática de Sítios Urbanos com Diferentes Níveis de Cobertura Vegetal Como Subsídio à Formação de Ilha de Calor

2020 ◽  
Vol 13 (07) ◽  
pp. 3254
Author(s):  
Pedro Hugo Oliveira Moreira ◽  
Alan Cavalcanti da Cunha ◽  
João De Athaydes Silva Júnior ◽  
Antonio Carlos Lola da Costa
Keyword(s):  
Land Use ◽  
Relative Humidity ◽  
Urban Heat Island ◽  
Urban Space ◽  
Vegetation Index ◽  
Data Series ◽  
Heat Island ◽  
Urban Heat ◽  
Meteorological Elements ◽  
The City

O objetivo da investigação é analisar variações espaciais e sazonais de elementos meteorológicos que evidenciam a formação e ocorrência do fenômeno da Ilha de Calor Urbana (ICU) na cidade de Macapá. A metodologia de estudo avaliou a evolução histórica da cobertura de vegetação e da malha urbana utilizando-se técnicas de geoprocessamento e de classificação supervisionada de Máxima Verossimilhança (MAXVER). Com este objetivo foram analisadas séries de dados contínuos coletados durante dez dias consecutivos nos períodos chuvoso (Abril/2018), Seco (Novembro/2018) e Transição (Junho/2019). Os elementos meteorológicos quantificados foram a umidade relativa do ar (UR) e a temperatura média do ar (T). Cinco estações semi-automáticas foram estrategicamente distribuídas ao longo de dois eixos de máximo prolongamento da zona urbana de Macapá, nos sentidos Nordeste-Sudoeste e Oeste-Leste. Os resultados indicaram significativa variação sazonal da Temperatura e da Umidade Relativa (p<0,05). Espacialmente, os resultados também foram significativos (p<0,05), sugerindo influência espaço-sazonal dos padrões de variabilidade de T e UR sobre ICU correlacionados com as taxas de uso e ocupação do solo. Assim, ICU mostrou-se significativamente dependente tanto do índice de vegetação (R2=0,47, p<0,05) quanto do índice de urbanização (R2=0,62, p<0,05). Conclui-se que a sazonalidade diária observada sugere existência do fenômeno da ilha de calor urbana, especialmente nas zonas central e sul da cidade, cujos índices inclusive têm sido confirmados por estudos similares. Os dados de sazonalidade dos elementos meteorológicos analisados, sua relação com o uso do solo, podem trazer elementos importantes para o debate sobre a formação da ICU nas cidades amazônicas. Microclimatic Variation in Urban Sites with Different Levels of Vegetable Cover as a Subsidy to the Formation of Heat Island A B S T R A C TThe objective of the investigation is to analyze spatial and seasonal variations of meteorological elements that evidence the formation and occurrence of the phenomenon of the Urban Heat Island (UHI) in the city of Macapá. The study methodology comprised the historical evolution of vegetation cover and urban space using geoprocessing techniques and supervised classification of Maximum Likelihood (MAXVER). With this objective, continuous data series collected during ten consecutive days in the rainy (April/2018), Dry (November/2018) and Intermediate (June/2019) periods were analyzed. The meteorological elements quantified were relative humidity (RH) and average air temperature (T). Five semi-automatic gauges were strategically distributed along two axes of maximum extension of the urban area of Macapá, in the Northeast-Southwest and West-East directions. The results indicated significant seasonal variation of Temperature and Relative Humidity (p<0.05). Spatially, the results were also significant (p<0.05), suggesting influence of T and RH variability patterns on UHI correlated with land use and occupation rates on. Thus, ICU was significantly dependent on both the vegetation index (R2=0.47, p<0.05) and the urbanization index (R2=0.62, p<0.05). We concluded that the daily seasonality observed suggests the existence of the phenomenon of the urban heat island, especially in the central and southern zones of the city, whose indices have even been confirmed by similar studies. The seasonality data of the meteorological elements analyzed, their relationship with land use, can bring important elements to the debate on the formation of ICU in Amazonian cities.Keywords: Meteorological element, vegetation, urbanization, urban heat island, Macapá.

scholarly journals Caracterização do Campo Térmico Urbano e suas Relações com o Uso e Ocupação do Solo no Campus Central da UFPB (Urban Climate: Characterization of Thermal Field and its Relations with the Different Forms of Soil Usage and Occupation in the Central...)

2011 ◽  
Vol 4 (3) ◽  
pp. 445 ◽  
Author(s):  
Joel Silva dos Santos ◽  
Beatriz Cristina Barbalho de Melo ◽  
Lincoln Eloi de Araújo ◽  
Évio Eduardo Chaves de Melo
Keyword(s):  
Thermal Comfort ◽  
Thermal Field ◽  
Urban Climate ◽  
Thermal Discomfort ◽  
Urban Climatology ◽  
Comfort Index ◽  
Great Relevance ◽  
Representative Points ◽  
The City

O trabalho correlaciona como as diferentes formas de uso e cobertura do solo interfere nas condições do campo térmico do Campus I da UFPB localizado na cidade de João Pessoa, PB. Para a realização da pesquisa inicialmente foi feito um levantamento bibliográfico a respeito da temática em questão, seguido do reconhecimento da área de estudo e das medições in loco para a coleta dos dados de temperatura e umidade relativa do ar. O experimento de campo foi realizado em 06 pontos representativos do campus durante dois períodos distintos, um chuvoso e o outro seco, de forma a caracterizar as condições do campo térmico local, devido ao adensamento de construções e a presença de arborização. Para o cálculo do índice de conforto térmico foi utilizado o Índice de Thom. Os resultados demonstraram que as diferentes formas de uso e ocupação do solo têm alterado o campo térmico da área em estudo, e gerado uma série de preocupações entre os planejadores desse espaço. Dentre as principais preocupações estão as relacionadas ao crescimento da estrutura da universidade (que se torna inevitável) devido à rápida expansão acadêmica e a diminuição das áreas verdes, que desempenham um papel importante para amenização climática. O Campus Universitário carece de estudos que correlacionem o crescimento das construções com as condições de conforto térmico da população. Em virtude disso, este trabalho tem grande relevância e importância, uma vez que procura articular os estudos na área de climatologia urbana ao planejamento e ordenamento territorial urbano. Palavras Chave: Clima Urbano, Campo Térmico, Índice de Desconforto Térmico  Urban Climate: Characterization of Thermal Field and its Relations with the Different Forms of Soil Usage and Occupation in the Central Campus of UFPB  ABSTRACT  The work seeks to correlate how different forms of use and land cover interfere under conditions of thermal field of UFPB Campus I located in the city of João Pessoa-PB. To carry out the search was initially made a bibliographic survey regarding the subject in question, followed by the recognition of the study area and spot measurements for the collection of data of temperature and relative humidity. Field experiment was conducted on 06 representative points of campus during two distinct periods, a rainy and dryin order to characterize the conditions of the local thermal field, due to the densification of constructions and the presence of af forestation. For the calculation of thermal comfort index was used the index of Thom. The results demonstrated that the different forms of soil usage and occupation have changed the thermal field of the área under study, and generated a number of concerns among the planners of this space. Among the main concerns are related to the growth of the University's structure (that becomes unavoidable) due to rapid academic expansion and decline of Green areas, which play an important role for climate thawing. The Campus lacks studies that correlate the growth of buildings with thermal comfort conditions of the population. As a result, this work has great relevance and importance, since it seeks to articulate the studies in the area of urban climatology to urban planning and regional planning. Keywords: Urban climate, Thermal Field, Thermal Discomfort index

Urban Transition and Its Impact on Mesoscale Weather

2021 ◽  
pp. 187-216
Author(s):  
Sudhansu S. Rath ◽  
Jagabandhu Panda ◽  
Srutisudha Mohanty
Keyword(s):  
Land Use ◽  
Numerical Modeling ◽  
Land Surface ◽  
Surface Characteristics ◽  
Urban Transition ◽  
Urban Heat ◽  
Weather Parameters ◽  
Impact Of Urbanization ◽  
The City ◽  
Land Surface Characteristics

Urban transition is an unstoppable process. Globally, several planning measures are taken by the city and country administration to control the sprawling process. Despite all the planning, most of the cities experience appreciable impact of urbanization on the localized weather parameters. This chapter summarizes the understanding relating to urban modification of localized weather, that is, changes in precipitation, temperature, and wind speed in the form of increase or decrease, their spatio-temportal distribution, urban heat island (UHI), and urban wind island (UWI). The impacts of the urbanization are primarily because of changes in land-surface characteristics due to the alteration of land use in a city. The urbanization effects on local or mesoscale weather could be studied both through observations and/or numerical modeling. The purpose of this chapter is to provide a review of most of the relevant studies carried out globally and with a special emphasis on India.

scholarly journals O (DES)CONFORTO NO CONJUNTO HABITACIONAL DEOCLÉCIO ARTUZZI I, DOURADOS -MS, NO VERÃO DE 2018

2019 ◽  
Vol 8 (2) ◽  
pp. 133-144
Author(s):  
Steffanny Cristina Pereira Santos ◽  
Charlei Aparecido da Silva ◽  
Vladimir Aparecido  dos Santos
Keyword(s):  
High Temperatures ◽  
Low Income ◽  
Growth Process ◽  
Urban Climate ◽  
Peripheral Region ◽  
Thermal Discomfort ◽  
The City ◽  
Housing Estates ◽  
Low Income Housing

A cidade de Dourados - MS apresenta predomínio de características climáticas tropicais com temperaturas elevadas, tal condição em conjunto com seu processo de crescimento justificam estudos sobre o clima urbano da mesma. Este trabalho tem como objetivo apresentar a análises dos dados de temperatura do ar e umidade relativa a partir do Índice de Desconforto Térmico de Thom (1959) em conjuntos habitacionais para pessoas de baixa renda localizados na região periférica da cidade. Os dados coletados apontaram que a forma de estruturação deste tipo de bairro e os materiais construtivos das casas influenciam no conforto ou desconforto térmico dos moradores.  Palavras-chave: Clima Urbano; Conjuntos habitacionais; Desconforto térmico.   Abstract The city of Dourados-MS presents predominance of characteristics with the climate of high temperatures, with the condition of grouping its growth process justifying the studies on the urban climate of the same. This work aims to present the temperature databases of the Thom Thermal Incompatibility Index (1959) in low-income housing complexes in the peripheral region of the city. The data found point out that the structuring of this type of neighborhood and the constructive materials of the houses influence the non-leisure or the thermal discomfort of the residents. Keys-words: Urban Climate; Housing estates; Thermal discomfort.

scholarly journals Comparison on Land-Use/Land-Cover Indices in Explaining Land Surface Temperature Variations in the City of Beijing, China

Land ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1018
Author(s):  
Muhammad Sadiq Khan ◽  
Sami Ullah ◽  
Liding Chen
Keyword(s):  
Remote Sensing ◽  
Land Use ◽  
Regression Analysis ◽  
Land Surface Temperature ◽  
Land Surface ◽  
Urban Landscape ◽  
Surface Characteristics ◽  
Land Use Land Cover ◽  
The City ◽  
Land Surface Characteristics

The urban thermal environment is closely related to landscape patterns and land surface characteristics. Several studies have investigated the relationship between land surface characteristics and land surface temperature (LST). To explore the effects of the urban landscape on urban thermal environments, multiple land-use/land-cover (LULC) remote sensing-based indices have emerged. However, the function of the indices in better explaining LST in the heterogeneous urban landscape has not been fully addressed. This study aims to investigate the effect of remote-sensing-based LULC indices on LST, and to quantify the impact magnitude of green spaces on LST in the city built-up blocks. We used a random forest classifier algorithm to map LULC from the Gaofen 2 (GF-2) satellite and retrieved LST from Landsat-8 ETM data through the split-window algorithm. The pixel values of the LULC types and indices were extracted using the line transect approach. The multicollinearity effect was excluded before regression analysis. The vegetation index was found to have a strong negative relationship with LST, but a positive relationship with built-up indices was found in univariate analysis. The preferred indices, such as normalized difference impervious index (NDISI), dry built-up index (DBI), and bare soil index (BSI), predicted the LST (R2 = 0.41) in the multivariate analysis. The stepwise regression analysis adequately explained the LST (R2 = 0.44) due to the combined effect of the indices. The study results indicated that the LULC indices can be used to explain the LST of LULC types and provides useful information for urban managers and planners for the design of smart green cities.

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