城市化期间生态空间的降温效益模式:长江经济带的一个案例研究
Guohui Yao1, Haidong Li1, Nan Wang1
1Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China.
The Science of the total environment
|May 8, 2024
概括
城市生态空间有助于调节温度,但它们在城市化过程中的冷却效率需要更多的研究. 这项研究检查了长江经济带城市的城市冷岛强度,发现强度增加和变冷/变暖趋势多样化.
科学领域:
- 城市生态城市生态学
- 适应气候变化 适应气候变化
- 环境科学 环境科学
背景情况:
- 城市生态空间对于缓解全球变暖引起的气温上升至关重要.
- 在快速城市化过程中,这些空间的冷却效率仍未得到充分研究.
- 了解城市冷岛 (UCI) 动态对于可持续城市规划至关重要.
研究的目的:
- 研究长江经济带 (YREB) 内的11个城市的UCI强度的时空动态.
- 评估生态景观趋势对UCI强度的影响.
- 为城市热应激管理策略提供见解.
主要方法:
- 使用了GlobalLand和MODIS的8天陆地表面平均温度 (LST) 数据,用于2000年,2010年和2020年.
- 分析了景观模式指数和多样性指数,以了解生态变化.
- 量化UCI强度及其与LST和景观特征的相关性.
主要成果:
- 在20年内,YREB的建筑面积增加了六倍.
- 62.53%的YREB经历了变暖,而37.47%降温;白天的降温为71.22%,夜间的升温为93%.
- 平均UCI强度从0.518增加到0.847,显示出与LST的负相关性. 绿色空间UCI强度上升,而蓝色空间UCI强度下降.
结论:
- 生态空间的维护,绿色空间的结构完整性和蓝色空间的连接性是城市热应激管理的关键.
- 景观形状指数是蓝色和绿色空间中UCI强度的关键决定因素.
- 应根据不同城市发展水平量身定制战略,以增强城市的抗灾能力.
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