![]() L., 1973: Mesoscale objective map analysis using weighted time series observations. (in Chinese with English abstract)īarnes, S. Journal of the Meteorological Science, 31(4), 451–459. Yang, 2011: Simulation study of urbanization effects on summer daily precipitation over the Yangtze river delta. This accounts for the consistent increase in hourly heavy precipitation over the whole Shanghai area during recent times.Īlexandersson, H., 1986: A homogeneity test applied to precipitation data. (3) Regional warming, with subsequent enhancement of water vapor content, convergence of moisture flux and atmospheric instability, provided favorable physical backgrounds for the formation of extreme precipitation. ![]() In addition, the diurnal variation of rainfall intensity also shows distinctive urban-rural differences, especially during late afternoon and early nighttime in the city area. Attribution analysis shows that urbanization in Shanghai contributed greatly to the increase in both frequency and intensity of heavy rainfall events in the city, thus leading to an increasing total precipitation amount of heavy rainfall events. (2) The spatial distribution of long-term trends for the occurrence frequency and total precipitation intensity of hourly heavy precipitation in Shanghai shows a distinct urban rain-island feature namely, heavy precipitation was increasingly focused in urban and suburban areas. During the recent urbanization period from 1981 to 2014, the frequency of heavy precipitation increased significantly, with a distinct localized and abrupt characteristic. ![]() Results show that: (1) Over the last century, extreme hourly precipitation events enhanced significantly. Using the hourly precipitation records of meteorological stations in Shanghai, covering a period of almost a century (1916–2014), the long-term variation of extreme heavy precipitation in Shanghai on multiple spatial and temporal scales is analyzed, and the effects of urbanization on hourly rainstorms studied. ![]()
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