关键词: 上海, 城市范围, CO₂排放

Abstract: Based on the 1 km CO₂ emission gridded dataset, the CO₂ emissions of Shanghai’s four urban boundaries, namely city administrative boundary (UB1), city district boundary (UB2), city built-up area (UB3) and urban proper (UB4) respectively, were analyzed and compared. The spatial characteristics of CO₂ emissions of UB1 showed three gradient distribution patterns with city center as the hotspot and emissions of grids gradually decreasing outward. There was spatially clustering phenomenon in CO₂ emissions in UB1, and emissions of some local areas may have significant positive effect on its surrounding area, which indicated by spatial autocorrelation analysis. The UB4 is the appropriate boundary for city of Shanghai. The CO₂ emissions in UB4 totaled to 189 million t, and per capita emissions reached 12.04 t in 2007. The emissions of UB4 accounted for 75.40% of the emissions of UB1. The per capita emissions of UB1 were 12% higher than that of UB4. The industrial area and urban area were spatially coincided in a high degree in Shanghai, which led to high emission sources concentrated in UB4. Emissions of top one grid accounted roughly for 10%-20% of total emissions in 3 correspondent urban boundaries. The emission sum of top 10 and top 100 grids accounted for more than 60% and 80% respectively, of the total emissions in 3 correspondent urban boundaries.

Key words: Shanghai, urban boundaries, CO₂ emissions