التفاصيل البيبلوغرافية
| العنوان: |
Improving Urban Climate Adaptation Modeling in the Community Earth System Model (CESM) Through Transient Urban Surface Albedo Representation. |
| المؤلفون: |
Sun, Yuan1,2 (AUTHOR) yuan.sun-7@postgrad.manchester.ac.uk, Fang, Bowen3 (AUTHOR), Oleson, Keith W.4 (AUTHOR), Zhao, Lei3,5,6 (AUTHOR), Topping, David O.1 (AUTHOR), Schultz, David M.1,2 (AUTHOR), Zheng, Zhonghua1,2 (AUTHOR) zhonghua.zheng@manchester.ac.uk |
| المصدر: |
Journal of Advances in Modeling Earth Systems. Dec2024, Vol. 16 Issue 12, p1-30. 30p. |
| مصطلحات موضوعية: |
*CLIMATE change adaptation, *CLIMATE change models, *ENERGY consumption of buildings, *URBAN heat islands, *ALBEDO |
| مستخلص: |
Increasing the albedo of urban surfaces, through strategies like white roof installations, has emerged as a promising approach for urban climate adaptation. Yet, modeling these strategies on a large scale is limited by the use of static urban surface albedo representations in the Earth system models. In this study, we developed a new transient urban surface albedo scheme in the Community Earth System Model and evaluated evolving adaptation strategies under varying urban surface albedo configurations. Our simulations model a gradual increase in the urban surface albedo of roofs, impervious roads, and walls from 2015 to 2099 under the SSP3‐7.0 scenario. Results highlight the cooling effects of roof albedo modifications, which reduce the annual‐mean canopy urban heat island intensity from 0.8°C in 2015 to 0.2°C by 2099. Compared to high‐density and medium‐density urban areas, higher albedo configurations are more effective in cooling environments within tall building districts. Additionally, urban surface albedo changes lead to changes in building energy consumption, where high albedo results in more indoor heating usage in urban areas located beyond 30°N and 25°S. This scheme offers potential applications like simulating natural albedo variations across urban surfaces and enables the inclusion of other urban parameters, such as surface emissivity. Plain Language Summary: Higher albedo surfaces reflect more sunlight, which helps cool down cities. Yet, research into how altering the albedo of urban surfaces on a global scale can aid climate adaptation is limited. It either relies on empirical analysis, oversimplifying urban physical processes, or assumes that urban surface albedo remains constant over time. These limitations hinder our understanding of how changes in urban surfaces can impact the urban thermal environment. In this study, we developed a new option that allows urban surface albedo to vary over time within a global climate model. By gradually increasing global urban surface albedo, we quantified the cooling effects of implementing high urban albedo in a more realistic way. This new option sets the stage for future exploration of scenarios like painting roofs white or how materials age, shedding light on effective urban climate adaptation strategies. Key Points: We developed a new representation scheme of transient urban surface albedo in Community Earth System Model (CESM) to improve urban climate adaptation modelingThe new scheme enables CESM to assess evolving adaptation strategies for roofs, impervious roads, and walls over timeSimulations show increasing roof albedo cools cities more effectively than increasing wall or impervious road albedo [ABSTRACT FROM AUTHOR] |
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