Carbon Sequestration and Spatial Differentiation Characteristics of Urban Forest in China

Abstract

Based on large-scale data measured in quadrats, and using remote sensing images, the author analyzed the spatial differentiation characteristics of carbon storage and carbon density of forest vegetation in the north foot of the Qinling Mountains in China, by combining an allometric growth model with spatial analysis using a Geographic Information System. The results showed that the average carbon density of forest vegetation in the main urban area in Xi'an occurred in the order: cultural and educational green space > scenic-area green space > road green space > industrial green space > residential green space. The average carbon density of arbor forest was 6.308 kg/m 2 . The carbon storage capacity varied in the order: green land in cultural and educational districts > scenic-area green space > road green space > residential green space > industrial green space. The total amount of carbon storage in the arbor forest was 519,180 t C. The spatial distribution pattern of carbon density in the arbor layer in the Xi'an administrative region was not balanced, showing high value in a southern suburb and low value in a northern suburb. Increasing forest vegetation, improving the quality of the forest structure, and increasing the three-dimensional green quantity of urban forest are effective ways to improve urban environments and to enhance carbon sequestration by forests.

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