段晓宇, 黄庆旭, 白岩松, 冯星云, 周轶晗. 中国建成区植被变绿趋势识别及对比分析[J]. 北京师范大学学报(自然科学版), 2023, 59(2): 206-217. DOI: 10.12202/j.0476-0301.2022162
引用本文: 段晓宇, 黄庆旭, 白岩松, 冯星云, 周轶晗. 中国建成区植被变绿趋势识别及对比分析[J]. 北京师范大学学报(自然科学版), 2023, 59(2): 206-217. DOI: 10.12202/j.0476-0301.2022162
DUAN Xiaoyu, HUANG Qingxu, BAI Yansong, FENG Xingyun, ZHOU Yihan. Identification and comparative analysis of vegetation greening trends in built-up areas in China[J]. Journal of Beijing Normal University(Natural Science), 2023, 59(2): 206-217. DOI: 10.12202/j.0476-0301.2022162
Citation: DUAN Xiaoyu, HUANG Qingxu, BAI Yansong, FENG Xingyun, ZHOU Yihan. Identification and comparative analysis of vegetation greening trends in built-up areas in China[J]. Journal of Beijing Normal University(Natural Science), 2023, 59(2): 206-217. DOI: 10.12202/j.0476-0301.2022162

中国建成区植被变绿趋势识别及对比分析

Identification and comparative analysis of vegetation greening trends in built-up areas in China

  • 摘要: 基于2001—2020年增强型植被指数(enhanced vegetation index,EVI),利用曼-肯德尔(Mann-Kendall,M-K)检验与泰尔指数,分析中国老城区(2000年已成为建成区)与扩展区(2000—2016年新增建成区)的植被变绿趋势,以及在不同气候变化区植被变绿趋势的差异.研究发现:1)中国约20%(17 290 km2)的建成区植被呈显著变绿趋势.其中华东—华中湿暖趋势带的建成区植被变绿面积,占中国建成区植被总变绿面积的46.61%,30个省级行政区10%以上的建成区植被呈显著变绿趋势.2)在老城区与扩展区的植被变绿趋势的对比上,老城区的植被显著变绿,扩展区的植被微弱变绿,老城区的植被变绿面积(13 474 km2)是扩展区植被变绿面积(3 818 km2)的3.5倍多.不同气候变化区的植被变绿趋势差异表明,需要因地制宜地应对气候变化对城市建成区植被生长的影响,重视西南—华南干暖趋势带的供水设施建设,保证植被的生长需求.

     

    Abstract: Built-up areas are main places for human activities.Currently, we still lack a clear understanding of the spatiotemporal differences in greening trends between old and new urban areas within cities across China.Enhanced vegetation index from 2001-2020 was used in this study to analyze differences in greening trends between old and expanding built-up areas in China by Mann-Kendall test and Theil index.Approximately 20% (17 290 km2) of built-up areas in China were found to exhibit a significant greening trend; the East China-Central China wet-warm zone contributed 46.6% of the total greening area in China; more than 10% of the built-up areas in 30 provinces showed a significant greening trend.A comparison between older and expanding built-up areas found that older areas had become significantly greener, whereas the more recently expanded areas had become slightly greener; the greening area in older areas(13 474 km2) was 3.5 times that in the expanding areas(3 818 km2) .Differences in the greening trend of vegetation in different climate change zones indicated that it is necessary to respond to the impact of climate change on the growth of vegetation in urban built-up areas locally, and pay attention to water supply facilities in the Southwest-South China dry-warm zone to meet the demand of vegetation growth.

     

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