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DOI	10.5194/acp-19-7001-2019
	Simulation of the radiative effect of haze on the urban hydrological cycle using reanalysis data in Beijing
	Kokkonen T.V.; Grimmond S.; Murto S.; Liu H.; Sundström A.-M.; Järvi L.
发表日期	2019
ISSN	16807316
起始页码	7001
结束页码	7017
卷号	19 期号:10
英文摘要	Although increased aerosol concentration modifies local air temperatures and boundary layer structure in urban areas, little is known about its effects on the urban hydrological cycle. Changes in the hydrological cycle modify surface runoff and flooding. Furthermore, as runoff commonly transports pollutants to soil and water, any changes impact urban soil and aquatic environments. To explore the radiative effect of haze on changes in the urban surface water balance in Beijing, different haze levels are modelled using the Surface Urban Energy and Water Balance Scheme (SUEWS), forced by reanalysis data. The pollution levels are classified using aerosol optical depth observations. The secondary aims are to examine the usability of a global reanalysis dataset in a highly polluted environment and the SUEWS model performance. We show that the reanalysis data do not include the attenuating effect of haze on incoming solar radiation and develop a correction method. Using these corrected data, SUEWS simulates measured eddy covariance heat fluxes well. Both surface runoff and drainage increase with severe haze levels, particularly with low precipitation rates: runoff from 0.06 to 0.18mmd-1 and drainage from 0.43 to 0.62mmd-1 during fairly clean to extremely polluted conditions, respectively. Considering all precipitation events, runoff rates are higher during extremely polluted conditions than cleaner conditions, but as the cleanest conditions have high precipitation rates, they induce the largest runoff. Thus, the haze radiative effect is unlikely to modify flash flooding likelihood. However, flushing pollutants from surfaces may increase pollutant loads in urban water bodies. © Author(s) 2019.
语种	英语
scopus关键词	aerosol; air temperature; atmospheric pollution; boundary layer; computer simulation; flooding; haze; heat flux; hydrological cycle; runoff; solar radiation; urban area; Beijing [China]; China
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/144380
作者单位	Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, Helsinki, Finland; Department of Meteorology, University of Reading, Reading, United Kingdom; Department of Meteorology, University of Stockholm, Stockholm, Sweden; Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Earth Observation, Finnish Meteorological Institute, Helsinki, Finland; Helsinki Institute of Sustainability Science, University of Helsinki, Helsinki, Finland
推荐引用方式 GB/T 7714	Kokkonen T.V.,Grimmond S.,Murto S.,et al. Simulation of the radiative effect of haze on the urban hydrological cycle using reanalysis data in Beijing[J],2019,19(10).
APA	Kokkonen T.V.,Grimmond S.,Murto S.,Liu H.,Sundström A.-M.,&Järvi L..(2019).Simulation of the radiative effect of haze on the urban hydrological cycle using reanalysis data in Beijing.Atmospheric Chemistry and Physics,19(10).
MLA	Kokkonen T.V.,et al."Simulation of the radiative effect of haze on the urban hydrological cycle using reanalysis data in Beijing".Atmospheric Chemistry and Physics 19.10(2019).