Dynamics and controls of urban heat sink and island phenomena in a desert city: Development of a local climate zone scheme using remotely-sensed inputs

2016 ◽  
Vol 51 ◽  
pp. 76-90 ◽  
Author(s):  
Ahmed K. Nassar ◽  
G. Alan Blackburn ◽  
J. Duncan Whyatt
Keyword(s):  
Heat Sink ◽  
Remotely Sensed ◽  
City Development ◽  
Climate Zone ◽  
Local Climate ◽  
Urban Heat ◽  
Island Phenomena ◽  
Local Climate Zone

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.

Inter-local climate zone differentiation of land surface temperatures for Management of Urban Heat in Nairobi City, Kenya

Urban Climate ◽  
2020 ◽  
Vol 31 ◽  
pp. 100540 ◽  
Author(s):  
Emmanuel Matsaba Ochola ◽  
Elham Fakharizadehshirazi ◽  
Aggrey Ochieng Adimo ◽  
John Bosco Mukundi ◽  
John Mwibanda Wesonga ◽  
...  
Keyword(s):  
Land Surface ◽  
Climate Zone ◽  
Local Climate ◽  
Surface Temperatures ◽  
Land Surface Temperatures ◽  
Urban Heat ◽  
Local Climate Zone

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 Exploring the distribution of energy consumption in a northeast Chinese city based on local climate zone scheme: Shenyang city as a case study

2020 ◽  
Vol 38 (5) ◽  
pp. 2079-2094
Author(s):  
Guang Yang ◽  
Yanpeng Fu ◽  
Minghui Yan ◽  
Jing Zhang
Keyword(s):  
Energy Consumption ◽  
Urban Planning ◽  
Residential Buildings ◽  
High Energy ◽  
Cumulative Energy ◽  
Climate Zone ◽  
Local Climate ◽  
High Rise ◽  
Urban Heat ◽  
Local Climate Zone

The local climate zone (LCZ) scheme is now used to investigate urban heat islands, which provides additional reference for energy consumption simulation. Based on the LCZ scheme, a LCZ mapping of Shenyang, a city in northeast China, was first constructed using the World Urban Database and Access Portal Tools (WUDAPT) Level 0 method. Subsequently, DeST-h was considered to simulate the energy consumption of urban buildings with concentration areas. The results show that with Shenyang being a severely cold area, the annual energy consumption of heating is approximately twice that of refrigeration for an individual building. The total energy consumption of open-distributed single buildings is higher than that of compact-distributed single buildings. Consequently, the unit cumulative energy consumption in compact-distributed buildings is higher than that in openly distributed building areas. The compact high-rise buildings (LCZ 1) have the highest energy consumption, with a unit annual energy consumption of 123,771.150 MW·h, which is equivalent to 41,257 tons of standard coal combustion power generation. Considering the energy consumption of residential buildings, the central high-rise buildings group and the compact centralized middle-rise buildings in the downtown area are high energy consumption areas. For future urban planning, design strategies such as energy-saving transformation and energy planning should be considered. The research results can provide a scientific basis and theoretical support for reducing building energy consumption, alleviating the urban heat island effect, and the development of modern urban planning.

scholarly journals Multi-Temporal Effects of Urban Forms and Functions on Urban Heat Islands Based on Local Climate Zone Classification

2019 ◽  
Vol 16 (12) ◽  
pp. 2140 ◽  
Author(s):  
Jinling Quan
Keyword(s):  
Time Scales ◽  
Land Surface ◽  
Urban Heat Islands ◽  
Climate Zone ◽  
Local Climate ◽  
Urban Forms ◽  
Heat Islands ◽  
Multi Temporal ◽  
Urban Heat ◽  
Local Climate Zone

Urban forms and functions have critical impacts on urban heat islands (UHIs). The concept of a “local climate zone” (LCZ) provides a standard and objective protocol for characterizing urban forms and functions, which has been used to link urban settings with UHIs. However, only a few structure types and surface cover properties are included under the same climate background or only one or two time scales are considered with a high spatial resolution. This study assesses multi-temporal land surface temperature (LST) characteristics across 18 different LCZ types in Beijing, China, from July 2017 to June 2018. A geographic information system-based method is employed to classify LCZs based on five morphological and coverage indicators derived from a city street map and Landsat images, and a spatiotemporal fusion model is adopted to generate hourly 100-m LSTs by blending Landsat, Moderate Resolution Imaging Spectroradiometer (MODIS), and FengYun-2F LSTs. Then, annual and diurnal cycle parameters and heat island and cool island (HI or CI) frequency are linked to LCZs at annual, seasonal, monthly, and diurnal scales. Results indicate that: (1) the warmest zones are compact and mid and low-rise built-up areas, while the coolest zones are water and vegetated types; (2) compact and open high-rise built-up areas and vegetated types have seasonal thermal patterns but with different causes; (3) diurnal temperature ranges are the highest for compact and large low-rise settings but the lowest for water and dense or scattered trees; and (4) HIs are the most frequent summertime and daytime events, while CIs occur primarily during winter days, making them more or less frequent for open or compact and high- or low-rise built-up areas. Overall, the distinguishable LSTs or UHIs between LCZs are closely associated with the structure and coverage properties. Factors such as geolocation, climate, and layout also interfere with the thermal behavior. This study provides comprehensive information on how different urban forms and functions are related to LST variations at different time scales, which supports urban thermal regulation through urban design.

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