Modeling potential air temperature reductions yielded by cool roofs and urban irrigation in the Kansas City Metropolitan Area
Abstract
In this work, we evaluate two mitigation strategies for urban heat island (UHI) in the Kansas City Metropolitan Area (KCMA). Using the Weather Research and Forecasting (WRF) model, we assess the potential benefits of reflective “cool” roofs and urban irrigation on air temperature in typical summer conditions between 2011 and 2015, and during six of the strongest historical heat waves from 2005 to 2016. Under the typical summer conditions, we simulate 2-m air temperature for 10 summer weeks, finding average daytime (07:00–19:00 local time) temperature reductions of 0.08 and 0.28 °C for cool roofs and urban irrigation, respectively. During the six heat-wave episodes, we find daytime temperature reductions of 0.02 and 0.26 °C for the two scenarios, similar to those under typical summer conditions. Our results suggest that urban irrigation can be more efficient than cool roofs in mitigating UHI in metropolitan regions where the majority of the land cover is comprised of areas with low urban (i.e., non-vegetated) fractions. Finally, we find the alteration of surface conditions due to enhanced roof albedos influences precipitation within the WRF simulation, in particular during the heat waves. Further research would be necessary to determine the robustness of this last finding.
- Authors:
-
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Building Technologies Office
- OSTI Identifier:
- 1838640
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Urban Climate
- Additional Journal Information:
- Journal Volume: 37; Journal ID: ISSN 2212-0955
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES
Citation Formats
Jeong, Seongeun, Millstein, Dev, and Levinson, Ronnen. Modeling potential air temperature reductions yielded by cool roofs and urban irrigation in the Kansas City Metropolitan Area. United States: N. p., 2021.
Web. doi:10.1016/j.uclim.2021.100833.
Jeong, Seongeun, Millstein, Dev, & Levinson, Ronnen. Modeling potential air temperature reductions yielded by cool roofs and urban irrigation in the Kansas City Metropolitan Area. United States. https://doi.org/10.1016/j.uclim.2021.100833
Jeong, Seongeun, Millstein, Dev, and Levinson, Ronnen. Thu .
"Modeling potential air temperature reductions yielded by cool roofs and urban irrigation in the Kansas City Metropolitan Area". United States. https://doi.org/10.1016/j.uclim.2021.100833. https://www.osti.gov/servlets/purl/1838640.
@article{osti_1838640,
title = {Modeling potential air temperature reductions yielded by cool roofs and urban irrigation in the Kansas City Metropolitan Area},
author = {Jeong, Seongeun and Millstein, Dev and Levinson, Ronnen},
abstractNote = {In this work, we evaluate two mitigation strategies for urban heat island (UHI) in the Kansas City Metropolitan Area (KCMA). Using the Weather Research and Forecasting (WRF) model, we assess the potential benefits of reflective “cool” roofs and urban irrigation on air temperature in typical summer conditions between 2011 and 2015, and during six of the strongest historical heat waves from 2005 to 2016. Under the typical summer conditions, we simulate 2-m air temperature for 10 summer weeks, finding average daytime (07:00–19:00 local time) temperature reductions of 0.08 and 0.28 °C for cool roofs and urban irrigation, respectively. During the six heat-wave episodes, we find daytime temperature reductions of 0.02 and 0.26 °C for the two scenarios, similar to those under typical summer conditions. Our results suggest that urban irrigation can be more efficient than cool roofs in mitigating UHI in metropolitan regions where the majority of the land cover is comprised of areas with low urban (i.e., non-vegetated) fractions. Finally, we find the alteration of surface conditions due to enhanced roof albedos influences precipitation within the WRF simulation, in particular during the heat waves. Further research would be necessary to determine the robustness of this last finding.},
doi = {10.1016/j.uclim.2021.100833},
journal = {Urban Climate},
number = ,
volume = 37,
place = {United States},
year = {Thu Apr 29 00:00:00 EDT 2021},
month = {Thu Apr 29 00:00:00 EDT 2021}
}
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