Establishment and analysis of urban carbon budget map in Tainan metropolitan area

• Main Authors: Pei-RuWu, 吳佩儒
• Other Authors: Tzu-Ping Lin
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/x7qa6t

碩士 === 國立成功大學 === 建築學系 === 105 === As urban areas continue to develop and expand, carbon dioxide (CO2) emissions from their energy use are growing exponentially. Previous studies have provided a limited understanding of carbon budgets because they have used top-down data on a single spatial or temporal scale. In this study, urban spatial and statistical data for metropolitan Tainan are used to explore the CO2 system of the city and estimate the amount of CO2 emissions from road traffic, the use of electricity and gas in buildings, and the amount of CO2 absorbed by green spaces. Innovative annual and monthly carbon budget maps composed of 200 × 200-m grids are developed for the city through a geographic information system (GIS). An analysis of the result maps yields the following findings: First, CO2 emissions are concentrated in over-urbanized areas. Buildings account for the majority of CO2 emissions (54%) and produced 11% more CO2 in summer than in winter (owing to air-conditioning usage). Second, road traffic is the main source of CO2 emissions for under-urbanized areas (87%), and emissions from traffic exhibit insignificant seasonal variation. Based on these findings, the carbon budgets of four different over-urbanized areas are formulated and presented on 50 × 50-m grids. The results suggest that green spaces in these areas absorb limited amounts of CO2. Therefore, this study assesses the annual and monthly carbon-reduction potential of rooftops equipped with solar panels occupying 30% of their area. The annual carbon-reduction potential for focused areas was 4.5–31.1 kg CO2 m-2 yr-1, and the solar energy replacement rate is higher in winter. In summary, this study presents carbon budgets in high-resolution grids, and proposes reduction strategies for reducing CO2 emissions from urban activities to improve the sustainability of urban areas and their environs and inform urban planning and climate change adaptation.