Based on the temperature, precipitation data and main weather phenomenon records from 11 meteorological stations, the spatial and temporal distributions and the changes of main climate elements and the weather phenomena in Shanghai were analyzed using climate statistical diagnosis technology. The results indicate that the annual average temperature in Shanghai was higher in the urban areas and lower in the surrounding suburbs, with a maximum difference of 0.9 ℃; and the precipitation was heavier in the urban areas and southern suburbs, while less in the northern and western surrounding suburbs. The annual high temperature days were also greater in the urban areas than in the eastern and southern coastal areas, with a maximum difference of 9.5 days; and the annual torrential rain days were greater in the urban areas and Pudong region, but less in the western regions of Shanghai. The number of thunderstorm, gale and fog days did not show significant differences between the urban areas and suburbs. The annual haze days in the urban areas were evidently greater than those in the suburbs, with a maximum difference of 49.2 days. During the period from 1961 to 2013, the annual average temperature increased significantly while the annual precipitation increased slightly in Shanghai. The annual high temperature days and haze days increased with a linear rate of 2.7 and 11.3 days per decade respectively, while the annual thunderstorm, gale and fog days decreased with a linear rate of 1.9, 3.7 and 5.2 days per decade respectively in the past 53 years in Shanghai.
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