长期卫星观测显示,在城市环境中植被增长的持续增长在不断增加
Xi Peng1, Shucheng Jiang1, Shuguang Liu1
1College of Life Science and Technology, National Engineering Laboratory for Applied Technology in Forestry & Ecology in South China, Central South University of Forestry and Technology, Changsha 410004, China.
The Science of the total environment
|July 14, 2023
概括
城市植被的绿色 (增强植被指数,EVI) 从2000年至2017年显著增加,抵消了由于城市扩张而导致的直接植被损失. 这项研究量化了城市化和植被增长的长期共同演变.
科学领域:
- 城市生态城市生态学
- 遥感 遥感 遥感 遥感
- 环境科学 环境科学
背景情况:
- 城市化推动了重大环境变化,影响了植被覆盖和生长动态.
- 以前的研究表明,城市地区的植被增长有所提升,但长期时间演变尚未得到充分研究.
研究的目的:
- 通过使用长期遥感数据,评估城市化对植被绿色影响的时间演变.
- 量化植被增长增强对城市环境中直接植被丧失的补偿效应.
主要方法:
- 利用长时间的遥感图像来分析植被的绿色 (增强植被指数,EVI).
- 应用了扩展框架来评估2000年至2017年中国长沙城市化对EVI的影响.
- 研究了植物对不同城市化水平的反应的空间异质性和时间趋势.
主要成果:
- 植物生长增强在城市地区普遍存在,在2000年至2017年期间增加了1.8倍.
- 增强的植被增长补偿了城市化导致的直接植被覆盖损失的28% (2000年) 至44% (2017年).
- 植被生长反应表现出空间异质性,在高度城市化地区汇聚到0.22的非对称最大EVI.
结论:
- 植被表现出强大的适应城市条件的能力,增长增强在缓解直接覆盖损失方面发挥着重要作用.
- 城市化对植被生长的积极影响是可量化的和可预测的,取决于城市化强度和时间.
- 这项研究为城市环境和植被的长期共同进化提供了新的见解,有助于预测未来的环境变化.
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