Analysis of regional disparity and reduction potential of carbon emission from construction of Zhengzhou city

Using statistic data of Zhengzhou city from 1999~2007, this paper estimated the carbon emission yearly from construction of Zhengzhou city, studied the composition and regional disparity of construction carbon emission, and analyzed urbanization and its impact on construction carbon emission of Zhengzhou city through scenario approach, then estimated the reduction potential of carbon emission of Zhengzhou city based on low-carbon scenario. The main conclusions as follows: (1) the total carbon emission from construction industry increased more than four times from 148.13 × 104t (1999) to 757.46 × 104t (2007). Cement carbon emission was the main carbon source of construction carbon emission. (2) Construction carbon emission of Jinshui district was the highest among all the counties and districts. The proportion of Jinshui district was 59% in average since 1999. (3) Under low-carbon scenario, the construction carbon emission of Zhengzhou city will reach peak value(4642 × 104t) by 2025, which would be 2680 × 104t less than that under basic scenario.(4) Controlling built-up areas, reducing energy consumption of builidings and adopting energy-saving technology will have important meaning for developing low carbon city of Zhengzhou.