气候变化领域集成服务门户(CCPortal): The "urban meteorology island": A multi-model ensemble analysis

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DOI	10.5194/acp-20-15061-2020
	The "urban meteorology island": A multi-model ensemble analysis
	Karlický J.; Huszár P.; Nováková T.; Belda M.; Švábik F.; Doubalová J.; Halenka T.
发表日期	2020
ISSN	1680-7316
起始页码	15061
结束页码	15077
卷号	20 期号:23
英文摘要	Cities and urban areas are well-known for their impact on meteorological variables and thereby modification of the local climate. Our study aims to generalize the urban-induced changes in specific meteorological variables by introducing a single phenomenon the urban meteorology island (UMI). A wide ensemble of 24 model simulations with the Weather Research and Forecasting (WRF) regional climate model and the Regional Climate Model (RegCM) on a European domain with 9 km horizontal resolution were performed to investigate various urban-induced modifications as individual components of the UMI. The results show that such an approach is meaningful, because in nearly all meteorological variables considered, statistically significant changes occur in cities. Besides previously documented urban-induced changes in temperature, wind speed and boundary-layer height, the study is also focused on changes in cloud cover, precipitation and humidity. An increase in cloud cover in cities, together with a higher amount of sub-grid-scale precipitation, is detected on summer afternoons. Specific humidity is significantly lower in cities. Further, the study shows that different models and parameterizations can have a strong impact on discussed components of the UMI. Multi-layer urban schemes with anthropogenic heat considered increase winter temperatures by more than 2 C and reduce wind speed more strongly than other urban models. The selection of the planetary-boundary-layer scheme also influences the urban wind speed reduction, as well as the boundary-layer height, to the greatest extent. Finally, urban changes in cloud cover and precipitation are mostly sensitive to the parameterization of convection. © 2020 BMJ Publishing Group. All rights reserved.
英文关键词	air temperature; boundary layer; climate modeling; cloud cover; ensemble forecasting; humidity; meteorology; precipitation (climatology); regional climate; urban atmosphere; urban climate; weather forecasting; wind velocity; Europe
语种	英语
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/168910
作者单位	Department of Atmospheric Physics, Faculty of Mathematics and Physics, Charles University, Prague, V Holešovičkách 2, Prague 8, 180 00, Czech Republic; Institute of Meteorology and Climatology, Department of Water, Atmosphere and Environment, University of Natural Resources and Life Sciences, Vienna, Gregor-Mendel-Straße 33, Vienna, 1180, Austria; Czech Hydrometeorological Institute (CHMI), Na Šabatce 17, Prague 4, 14306, Czech Republic
推荐引用方式 GB/T 7714	Karlický J.,Huszár P.,Nováková T.,et al. The "urban meteorology island": A multi-model ensemble analysis[J],2020,20(23).
APA	Karlický J..,Huszár P..,Nováková T..,Belda M..,Švábik F..,...&Halenka T..(2020).The "urban meteorology island": A multi-model ensemble analysis.Atmospheric Chemistry and Physics,20(23).
MLA	Karlický J.,et al."The "urban meteorology island": A multi-model ensemble analysis".Atmospheric Chemistry and Physics 20.23(2020).