scholarly journals Analysis of Urban Heat Island in Kochi, India, Using a Modified Local Climate Zone Classification

2014 ◽  
Vol 21 ◽  
pp. 3-13 ◽  
Author(s):  
George Thomas ◽  
A.P. Sherin ◽  
Shareekul Ansar ◽  
E.J. Zachariah
Keyword(s):  
Urban Heat Island ◽  
Heat Island ◽  
Climate Zone ◽  
Local Climate ◽  
Urban Heat ◽  
Local Climate Zone

scholarly journals Investigations of Surface Urban Heat Island Effect Based on Local Climate Zone Method: A Case of Xi'an

2019 ◽  
Vol 136 ◽  
pp. 05011
Author(s):  
Kaikai Mu ◽  
Yan Liu ◽  
Moyan Zhang ◽  
Bing Han ◽  
Liu Yang
Keyword(s):  
Land Cover ◽  
Urban Heat Island ◽  
Urban Form ◽  
Heat Island ◽  
Zone Method ◽  
Climate Zone ◽  
Local Climate ◽  
Urban Heat ◽  
Surface Urban Heat Island ◽  
Local Climate Zone

Urbanization seriously affects the urban climate and the quality of human settlement. Based on Landsat8 remote sensing and building vector data, local climate zone (LCZ) method is employed to study the influences of urban form on land surface temperature (LST) of Xi'an. The results confirmed that the LST of the built-up LCZ is higher than the land cover LCZ. In built-up LCZ, LST is increasing with the increasing of building density. In land cover LCZ, the LST of bare land is the highest. Surface urban heat island (SUHI) of 14 samples in LCZ also been calculated. Highest SUHI intensity is found in low-rise buildings with high density area. LST intensity of water body and forest are lower than others in land cover LCZ.

scholarly journals Studying the Urban Heat Island Using a Local Climate Zone Scheme

2016 ◽  
Vol 25 (6) ◽  
pp. 2609-2616 ◽  
Author(s):  
Zhihao Wang ◽  
Wu Xing ◽  
Yi Huang ◽  
Tongan Xie
Keyword(s):  
Urban Heat Island ◽  
Heat Island ◽  
Climate Zone ◽  
Local Climate ◽  
Urban Heat ◽  
Local Climate Zone

scholarly journals Analyzing the Characteristics of UHI (Urban Heat Island) in Summer Daytime Based on Observations on 50 Sites in 11 LCZ (Local Climate Zone) Types in Xi’an, China

2020 ◽  
Vol 13 (1) ◽  
pp. 83
Author(s):  
Yunwei Zhang ◽  
Jili Zhang ◽  
Xiaoqian Zhang ◽  
Dian Zhou ◽  
Zhaolin Gu
Keyword(s):  
Urban Heat Island ◽  
Urban Areas ◽  
High Surface ◽  
Tall Buildings ◽  
Heat Island ◽  
Climate Zone ◽  
Local Climate ◽  
Surface Fraction ◽  
Urban Heat ◽  
Local Climate Zone

Urbanization has induced significant changes on local climate in urban areas. For sustainable urban planning, it is necessary to identify the distribution characteristics of urban heat island (UHI) and the effects of land cover properties. In situ measurements are frequently carried out to obtain critical data in urban climate studies. However, long-time continuous observations on multiple sites are still rare, even though they would be useful in mapping the distribution of UHI intensity. In the current work, three observation campaigns were carried out in Xi’an, China. Pedestrian- level air temperatures (PLAT) were measured with potable micro-environment stations on 50 sites in 11 local climate zone (LCZ) types. The normalized PLAT was used to investigate the canopy layer UHI characteristics and the effects of LCZ types. Results revealed that the land coverage type and the surface structure have significant influence on the local climate. The PLAT in high-surface-fraction building covered areas was higher than that in low-surface-fraction building covered areas. In areas with similar building surface fraction, building height influences the UHI magnitude as well, as tall buildings would provide more shielding on the pedestrian level. The average UHI magnitude and the standard deviation within each LCZ type were calculated by statistical analysis of the observed results, which proved to be useful for UHI mapping based on the LCZ classification results in urban areas.

scholarly journals Characterization of the urban heat island at Bucaramanga, Colombia, using real-time temperature monitoring

2019 ◽  
Author(s):  
Hildreth Jadira Villamil-Almeida ◽  
Kevin Andrés Blanco-Mantilla ◽  
Oscar Yazit Salah-García ◽  
Carlos Eduardo García Sánchez
Keyword(s):  
Urban Heat Island ◽  
Real Time ◽  
Mean Value ◽  
Heat Island ◽  
Local Climate ◽  
Urban Heat ◽  
The City ◽  
Local Climate Zone ◽  
Meteorological Effects

One of the meteorological effects in cities is the increase in local temperature, which is known as urban heat island (UHI). The objective of this study was to detect and quantify the possible UHI in the city of Bucaramanga, Colombia. For this purpose, a real-time temperature measurement network was installed, composed of seven nodes, used to obtain temperature values every minute. Six of the nodes were located in different positions in the city, and the remaining one was used to give the reference measurement. The data collected were processed for elimination of outliers, management of missing data and noise filtering. Analysis of the data allowed detecting differences in the diurnal and nocturnal UHI intensity trends. It was concluded that the UHI intensity during the day varies depending on the Local Climate Zone that represents the location, while the UHI intensity value at night is quite uniform across the city, with a mean value of 1.0 °C. It was also possible to conclude that the magnitude of the daytime UHI is lower in the dry season.

scholarly journals An Assessment of Microclimates in Southern Ontario: the Application of the Local Climate Zone Method in Toronto and the Surrounding Region

2021 ◽  
Author(s):  
E. Jerome Price-Todd
Keyword(s):  
Population Growth ◽  
Heat Island ◽  
Urbanization Process ◽  
Zone Method ◽  
Southern Ontario ◽  
Climate Zone ◽  
Local Climate ◽  
Urban Rural ◽  
Urban Heat ◽  
Local Climate Zone

The Golden Horseshoe is a densely populated area in southern Ontario and the population is expected to grow to 11.5 million residents by 2031. The urbanization process will likely intensify due to the current and expected population growth. The urban heat island (UHI) effect at 19 meteorological stations in southern Ontario were assessed using climate normals from 1981-2010 and the local climate zone (LCZ) method. The stations were assigned an LCZ unit based upon their calculated impervious, pervious and building surface fractions. It was found that areas representing higher urban-centric zones had higher UHI intensities (LCZ 5 with 2 K) than areas that were less urban-centric (LCZ 9 with 1.12 K and LCZ 6 with 1.37 K) revealing a continuum of “urbanicity”. The LCZ method provided greater objectivity when calculating the UHI intensity than the simpler method of an urban / rural dichotomy. With expected warming and population growth in the area the detrimental human health, environmental and economic impacts associated with the UHI effect should be given consideration for any future planning and decision making.

scholarly journals An Assessment of Microclimates in Southern Ontario: the Application of the Local Climate Zone Method in Toronto and the Surrounding Region

2021 ◽  
Author(s):  
E. Jerome Price-Todd
Keyword(s):  
Population Growth ◽  
Heat Island ◽  
Urbanization Process ◽  
Zone Method ◽  
Southern Ontario ◽  
Climate Zone ◽  
Local Climate ◽  
Urban Rural ◽  
Urban Heat ◽  
Local Climate Zone

The Golden Horseshoe is a densely populated area in southern Ontario and the population is expected to grow to 11.5 million residents by 2031. The urbanization process will likely intensify due to the current and expected population growth. The urban heat island (UHI) effect at 19 meteorological stations in southern Ontario were assessed using climate normals from 1981-2010 and the local climate zone (LCZ) method. The stations were assigned an LCZ unit based upon their calculated impervious, pervious and building surface fractions. It was found that areas representing higher urban-centric zones had higher UHI intensities (LCZ 5 with 2 K) than areas that were less urban-centric (LCZ 9 with 1.12 K and LCZ 6 with 1.37 K) revealing a continuum of “urbanicity”. The LCZ method provided greater objectivity when calculating the UHI intensity than the simpler method of an urban / rural dichotomy. With expected warming and population growth in the area the detrimental human health, environmental and economic impacts associated with the UHI effect should be given consideration for any future planning and decision making.

scholarly journals Urban Design Factors Influencing Surface Urban Heat Island in the Humid Subtropical Region Based on Local Climate Zone

2019 ◽  
Author(s):  
Yurong Shi ◽  
Yirui Xiang ◽  
Yufeng Zhang
Keyword(s):  
Urban Heat Island ◽  
Urban Design ◽  
Heat Island ◽  
Subtropical Region ◽  
Local Climate ◽  
Factors Influencing ◽  
Urban Heat ◽  
Surface Urban Heat Island ◽  
Design Factors ◽  
Local Climate Zone

Surface urban heat island (SUHI) depicts the deteriorating thermal environment in high-density cities and local climate zone (LCZ) classification provides a universal protocol for SUHI identification. In this study, taking the central urbanized area of Guangzhou in the humid subtropical region of China as the study area, the maps or images of LCZ, land surface temperature (LST), SUHI and urban design factors were achieved by using Landsat satellite data, GIS database and a series of retrieval and classification algorithms, and the urban design factors influencing SUHI were investigated based on 625 samples of LCZs. The results show that in the summer daytime under the clear sky condition, the LST varied greatly from 26 °C to 40 °C and the SUHI changed in a wide range of -6 °C to 8 °C in the LCZs of the study area. Seven and five urban design factors influencing the summer daytime SUHI were identified for the two dominant LCZ of LCZs 1-5 (LCZ 1 to LCZ 5) and the mixed LCZ (containing at least three types of LCZs), respectively. The summer daytime SUHI prediction models were obtained by using the step-wise multiple linear regression, with the performance of R2 of 0.697, RMSE of 1.21 °C, and the d value of 0.81 for the model of LCZs 1-5, and the values of 0.666, 1.66 °C, and 0.76 for the model of the mixed LCZ, indicating that the models can predict the changes of SUHI with LCZs to a large and satisfactory extent. This study presents a methodology to efficiently achieve a large sample of SUHI and urban design factors of LCZs in the largely urbanized cities, and provides information beneficial to the urban designs and regenerations in the humid subtropical region.

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