Assessing the Spatiotemporal Dynamics of Vegetation Coverage in Urban Built-Up Areas
Assessing the Spatiotemporal Dynamics of Vegetation Coverage in Urban Built-Up Areas
复制标题
评估城市建成区植被覆盖的时空动态
DOI：
10.3390/land12010235
复制
发表时间：
2023-01-01
期刊：
影响因子：
3.9
通讯作者：
Huang, Xiao
中科院分区：
文献类型：
--
作者：
Chen, Jinlong;Yu, Zhonglei;Huang, Xiao
植被作为碳循环过程中的主要碳汇，是实现“碳达峰”和“碳中和”的重要支撑。中国城市化进程中城市建成区植被覆盖度如何变化？利用Landsat遥感数据，提取城市建成区面积，计算归一化植被指数（NDVI），估算植被覆盖度（FVC），从全国和城市两个层面分析了中国省会城市建成区植被覆盖度的时空动态。主要结论如下：（1）城市建成区的FVC增长了7.97%，城市绿色空间由"绿色核心"分布模式逐渐向"绿色脉络"分布模式转变。(2)省会城市建成区的FVC差异显著，这可能是由自然地理环境、经济发展水平、建成区面积扩大、土地类型转换、绿化政策造林等多种因素造成的。（3）不是简单的提高或降低，省会城市建成区的FVC曲线呈现出振幅逐渐减弱的振荡模式。以期为我国城市生态建设提供科学参考，为促进城市居民与城市环境的和谐发展提供重要的理论依据和实践支持。
As the main carbon sink in the carbon cycle process, vegetation is an important support for achieving "carbon peaking" and "carbon neutrality. How does the vegetation coverage of urban built-up areas change in the process of urbanization in China? Taking advantage of Landsat remote sensing data, we extract urban built-up areas, calculate the Normalized Difference Vegetation Index (NDVI), estimate fractional vegetation cover (FVC), and analyze the temporal and spatial dynamics of vegetation coverage in built-up areas of provincial capitals from the national and individual city levels in China. Major conclusions are as follows: (1) The FVC in the urban built-up areas has increased by 7.97%, and the urban green space has gradually changed from the "green core" distribution model to the "green vein" distribution mode. (2) The disparities in FVC of built-up areas of provincial capitals are notable, presumably due to a variety of factors that include the natural geographic environment, economic development level, built-up area expansion, land type conversion, afforestation of greening policy, etc. (3) Not just simply raise or lower, the FVC curves in the built-up areas of provincial capital cities present oscillating patterns with gradually weakening amplitude. Our study is expected to provide scientific references of an important theoretical basis for urban ecological construction and practical support for promoting the harmonious development of urban residents and urban environments in China.