Land-surface-physics-based downscaling versus conventional dynamical downscaling for high-resolution urban climate change information: The case study of two cities
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引用次数: 0
Abstract
This study for the first time examines the performance of the computationally-efficient land-surface-physics-based downscaling (LSP-DS) approach for high-resolution urban climate prediction by comparing it with the conventional dynamical downscaling (D-DS). LSP-DS utilizes the offline land-surface-modeling system HRLDAS, while D-DS employs the regional climate model WRF. Both approaches integrate the coupled land-surface and urban-canopy models. Simulations are driven by coarse-resolution reanalysis data to achieve 2-km climate downscaling, targeting two cities, Tokyo and Singapore. The findings reveal that LSP-DS can accurately reproduce the urban heat island (UHI) effect at high resolution, comparable with D-DS. LSP-DS even shows consistently better results for urban areas, across varying weather conditions such as heatwaves, non-heatwaves, dry, and rainy periods. Both methods show the same performance on the compound effects of heatwaves and UHI, with LSP-DS tending to simulate moderate UHI effects compared with D-DS. This study highlights the LSP-DS's potential as a computationally efficient and effective tool for urban climate downscaling, particularly to serve the next IPCC special report on climate change and cities. However, users should be mindful of the LSP-DS's limitations, such as the absence of two-way feedback with atmospheric physical and dynamical processes, when applying LSP-DS and explaining its results.
期刊介绍:
Urban Climate serves the scientific and decision making communities with the publication of research on theory, science and applications relevant to understanding urban climatic conditions and change in relation to their geography and to demographic, socioeconomic, institutional, technological and environmental dynamics and global change. Targeted towards both disciplinary and interdisciplinary audiences, this journal publishes original research papers, comprehensive review articles, book reviews, and short communications on topics including, but not limited to, the following:
Urban meteorology and climate[...]
Urban environmental pollution[...]
Adaptation to global change[...]
Urban economic and social issues[...]
Research Approaches[...]