Green and cool roofs to mitigate urban heat island effects in the Chicago metropolitan area: evaluation with a regional climate model

Chicago is one of the most populated cites of US. It is located next to a freshwater source, Lake Michigan, and surrounded by productive agricultural land and diverse natural habitats. This study explores the sensitivity of mesoscale urban heat island (UHI) simulations to urban parameterizations, focusing on the Chicago metropolitan area (CMA) and its environs. For this purpose, a series of climate downscaling experiments using the Weather Research and Forecasting (WRF) model at 1 km horizontal resolution. A typical summer hot day in Chicago was considered, which is imitative of a summer day in the late 21st century. This study utilizes National Land Cover Database (NLCD) 2006 classifications to test UHI sensitivity for CMA. Among different urban parameterization schemes, BEP+BEM best reproduces the urban surface temperatures in comparison to other urban schemes. Results show that UHI is more pronounced with BEP and BEP+BEM schemes due to explicit accounting of anthropogenic heat (AH). The study also investigates the effects of urbanization on regional climate by replacing Chicago metropolitan area by agricultural landscape, which yielded increased surface wind speeds due to reduced mechanical and thermal resistance.

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Urban Heat Island and its effect on Dweller of Kolkata Metropolitan area using Geospatial Techniques

International Journal of Computer Sciences and Engineering ◽

10.26438/ijcse/v6i10.741753 ◽

2018 ◽

Vol 6 (10) ◽

pp. 741-753

Author(s):

Md Amir Ali Gazi ◽

Ismail Mondal

Keyword(s):

Urban Heat Island ◽

Metropolitan Area ◽

Heat Island ◽

Geospatial Techniques ◽

Urban Heat

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GIS-BASED SPATIAL ANALYSIS OF URBAN HEAT ISLAND IN FUKUOKA METROPOLITAN AREA

Journal of Japan Society of Civil Engineers Ser B1 (Hydraulic Engineering) ◽

10.2208/jscejhe.74.5_i_1189 ◽

2018 ◽

Vol 74 (5) ◽

pp. I_1189-I_1194

Author(s):

Yukun WANG ◽

Akiko NISHIMURA ◽

Yuji SUGIHARA ◽

Guoyun ZHOU ◽

Yukiko HISADA ◽

...

Keyword(s):

Spatial Analysis ◽

Urban Heat Island ◽

Metropolitan Area ◽

Heat Island ◽

Urban Heat

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The Urban Heat Island of the North-Central Texas Region and Its Relation to the 2011 Severe Texas Drought

Journal of Applied Meteorology and Climatology ◽

10.1175/jamc-d-12-0195.1 ◽

2013 ◽

Vol 52 (11) ◽

pp. 2418-2433 ◽

Cited By ~ 10

Author(s):

A. M. E. Winguth ◽

B. Kelp

Keyword(s):

Urban Heat Island ◽

Metropolitan Area ◽

Remotely Sensed ◽

Severe Drought ◽

Positive Trend ◽

Fort Worth ◽

Heat Island ◽

Rapid Urbanization ◽

Maximum Heat ◽

Urban Heat

AbstractHourly surface temperature differences between Dallas–Fort Worth, Texas, metropolitan and rural sites have been used to calculate the urban heat island from 2001 to 2011. The heat island peaked after sunset and was particularly strong during the drought and heat wave in July 2011, reaching a single-day instantaneous maximum value of 5.4°C and a monthly mean maximum of 3.4°C, as compared with the 2001–11 July average of 2.4°C. This severe drought caused faster warming of rural locations relative to the metropolitan area in the morning as a result of lower soil moisture content, which led to an average negative heat island in July 2011 of −2.3°C at 1100 central standard time. The ground-based assessment of canopy air temperature at screening level has been supported by a remotely sensed surface estimate from the Moderate Resolution Imaging Spectroradiometer (MODIS) on board the Terra satellite, highlighting a dual-peak maximum heat island in the major city centers of Dallas and Fort Worth. Both ground-based and remotely sensed spatial analyses of the maximum heat island indicate a northwest shift, the result of southeast winds in July 2011 of ~2 m s−1 on average. There was an overall positive trend in the urban heat island of 0.14°C decade−1 in the Dallas–Fort Worth metropolitan area from 2001 to 2011, due to rapid urbanization. Superimposed on this trend are significant interannual and decadal variations that influence the urban climate.

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