城市森林碳捕获能力的时空空间模式:在中国快速城市化过程中对城市CO2排放减排的影响

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Yujie Guo¹, Zhibin Ren¹, Chengcong Wang¹

¹Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, No. 4888 Shengbei Street, Changchun 130102, China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China.

The Science of the total environment

|November 25, 2023

概括

城市森林覆盖面扩大,但碎片化增加. 尽管碳捕获能力不断提高,但由于城市化迅速发展和碳排放增加,其对抵消排放的贡献有所减少.

科学领域:

城市生态城市生态学
环境科学环境科学
林业林业林业林业林业

背景情况:

城市森林提供了生态效益,并支持人类的福祉.
城市森林碳封存 (CS) 的时空变化在快速城市化中被了解得很少.
了解这些动态对于可持续城市规划至关重要.

研究的目的:

为了建模和预测城市森林的年度CS动态.
分析城市化对城市森林CS能力的影响.
为实现碳中和的城市绿化战略提供信息.

主要方法:

开发了一种使用图片测量CS和Landsat图像的年度CS动态的预测模型.
使用的规范差异植被指数 (NDVI) 用于绘制城市森林CS的地图.
从2000年到2019年,分析了森林覆盖面,碎片化,连接性和CS能力的变化.

主要成果:

长春的城市森林覆盖率从18.09%增加到24.01%,特别是在郊区.
森林地块变得越来越碎片化,联系越来越少,特别是在城市中心.
CS容量逐渐增加,郊区的价值更高;然而,由于碳排放增加,其对抵消排放的贡献从2.11%降至0.88%.

结论:

快速的城市化,特别是不透气的表面积 (48.7%的变化),显著影响了CS.
城市景观模式,如补丁连接和密度,影响CS能力.
研究结果支持制定有针对性的城市绿化战略,以提高碳中和性和创建低碳城市.

关键词:

碳封存是一种碳封存方式.森林结构森林结构城市生态系统的城市生态系统城市森林是城市森林.城市化的城市化.

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The Carbon Cycle

The Carbon Cycle

Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.

Global Climate Change

Global Climate Change

Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.