Abstract
By using a four dimensional data assimilation technology based on the nudging method, a real-time data assimilation system with horizontal resolution of 1km was established in Shenzhen, Guangdong Province to assimilate high-density and high-frequency observation data of Shenzhen and its surrounding areas, so as to form real-time reanalysis data. The quality evaluation of real-time reanalysis data was carried out by using the ground area automatic station and vertical wind profile data, the results showed that the real-time reanalysis data obtained from the system by assimilating multi-source and high-frequency data could effectively simulated the surface and vertical temperature and wind meteorological features of Shenzhen. Based on the real-time gridded reanalysis data set, Shenzhen Meteorological Bureau (SZMB) has released the real-time data products to the public through Wechat and SZMB official website, which has played an important role in natural ventilation evaluation of urban units. The current study showed that the Shenzhen real-time grid meteorological data products could be expected to provide scientific and technological support for finer scale urban monitoring and construction.
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