Urbanization-induced land and aerosol impacts on sea breeze circulation and convective precipitation

doi:10.5194/acp-2020-411

GSTDTAP > 地球科学

DOI	10.5194/acp-2020-411
	Urbanization-induced land and aerosol impacts on sea breeze circulation and convective precipitation
	Jiwen Fan, Yuwei Zhang, Zhanqing Li, Jiaxi Hu, and Daniel Rosenfeld
	2020-05-12
发表期刊	Atmospheric Chemistry and Physics
出版年	2020
英文摘要	Changes in land cover and aerosols resulting from urbanization may impact convective clouds and precipitation. Here we investigate how Houston urbanization can modify sea-breeze induced convective cloud and precipitation through urban land effect and anthropogenic aerosol effect. The simulations are carried out with the Chemistry version of the Weather Research and Forecasting model (WRF-Chem), which is coupled with the spectral-bin microphysics (SBM) and the multilayer urban model with a building energy model (BEM-BEP). We find that Houston urbanization (the joint effect of both urban land and anthropogenic aerosols) notably enhances storm intensity (by ~ 15 m s⁻¹ in maximum vertical velocity) and precipitation intensity (up to 45 %), with the anthropogenic aerosol effect more significant than the urban land effect. Urban land effect modifies convective evolution: speed up the transition from the warm cloud to mixed-phase cloud thus initiating surface rain earlier but slowing down the convective cell dissipation, all of which result from urban heating induced stronger sea breeze circulation. The anthropogenic aerosol effect becomes evident after the cloud evolves into the mixed-phase cloud, accelerating the development of storm from the mixed-phase cloud to deep cloud by ~ 40 min. Through aerosol-cloud interaction (ACI), aerosols boost convective intensity and precipitation mainly by activating numerous ultrafine particles at the mixed-phase and deep cloud stages. This work shows the importance of considering both urban land and anthropogenic aerosol effects for understanding urbanization effects on convective clouds and precipitation.
领域	地球科学
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引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/249067
专题	地球科学
推荐引用方式 GB/T 7714	Jiwen Fan, Yuwei Zhang, Zhanqing Li, Jiaxi Hu, and Daniel Rosenfeld. Urbanization-induced land and aerosol impacts on sea breeze circulation and convective precipitation[J]. Atmospheric Chemistry and Physics,2020.
APA	Jiwen Fan, Yuwei Zhang, Zhanqing Li, Jiaxi Hu, and Daniel Rosenfeld.(2020).Urbanization-induced land and aerosol impacts on sea breeze circulation and convective precipitation.Atmospheric Chemistry and Physics.
MLA	Jiwen Fan, Yuwei Zhang, Zhanqing Li, Jiaxi Hu, and Daniel Rosenfeld."Urbanization-induced land and aerosol impacts on sea breeze circulation and convective precipitation".Atmospheric Chemistry and Physics (2020).