期刊文献+

2001—2022年天津市植被净初级生产力时空动态及其与气候因子的关系

Spatial and Temporal Dynamics of Vegetation Net Primary Production and Its Relationship with Climate Factors in Tianjin City from 2001 to 2022
下载PDF
导出
摘要 [目的]定量分析植被生产力的变化规律及其对气候因子的响应情况,为评估不同气候条件下的城市碳汇作用以及提升城市生态系统碳汇等提供科学参考。[方法]基于GEE(google earth engine)对天津市2001—2022年植被净初级生产力(NPP)进行计算,采用Slope趋势分析、F检验、重心迁移模型、标准差椭圆模型等方法分析植被NPP时空变化格局,采用多因素敏感性分析、相关系数评价等方法定量评估在温度、降水、风速变化下植被NPP的响应特征。[结果]①天津市年均植被NPP呈波动性上升的趋势,波动范围是53.46~96.54 g/(m^(2)·a)(以C计)。②天津市植被NPP北高南低、西高东低,重心集中分布在中部区域,2001—2022年间重心逐步向南迁移。③天津市植被NPP对气候因子的响应具有明显滞后性,对温度和降水响应的滞后期为1个月,对风速响应的滞后期为3个月。[结论]天津市NPP变化存在较大的时空异质性,且受温度、降水、风速影响,对气候因子响应的滞后效应在1~3个月。 [Objective]The changes of vegetation net primary production(NPP)and its response to climate factors were quantitatively analyzed to provide scientific reference for assessing the role of urban carbon sequestration under different climate conditions and improving urban ecosystem carbon sequestration.[Methods]Based on GEE(Google Earth Engine),the NPP of Tianjin City during 2001—2022 was calculated,and the spatial and temporal variation pattern of NPP was analyzed by Slope trend analysis,F-test,barycentric migration model,standard deviation ellipse model,and other methods.Multi-factor sensitivity analysis and correlation coefficient evaluation were used to quantitatively evaluate the NPP response characteristics under temperature,precipitation,and wind-speed changes.[Results]①The average annual vegetation NPP in Tianjin City showed an increasing trend of fluctuation,and the fluctuation range was 53.46—96.54 g/(m^(2)·a)(calculated by C);②The vegetation NPP of Tianjin City is higher in the north and lower in the south,and higher in the west and lower in the east.The center of gravity is concentrated in the central region,and it gradually moved to the south during 2001—2022.③The response of vegetation NPP to climate factors in Tianjin City has a significant lag time of 1 month for temperature and precipitation and 3 months for wind speed.[Conclusion]The variation of NPP in Tianjin City has great spatiotemporal heterogeneity and is affected by temperature,precipitation,and wind speed,with a lag effect of 1—3 months in response to climate factors.
作者 张颖 黄执美 孟伟庆 李洪远 袁雪松 杨菲 王洪成 Zhang Ying;Huang Zhimei;Meng Weiqing;Li Hongyuan;Yuan Xuesong;Yang Fei;Wang Hongcheng(School of Architecture,Tianjin University,Tianjin 300072,China;School of Geography Sciences,Southwest University,Chongqing 400700,China;Faculty of Geography,Tianjin Normal University,Tianjin 300387,China;School of Environmental Science and Engineering,Nankai University,Tianjin 300350,China;School of Geography Sciences,East China Normal University,Shanghai 200241,China)
出处 《水土保持通报》 CSCD 北大核心 2024年第6期278-287,共10页 Bulletin of Soil and Water Conservation
基金 国家自然科学基金面上项目“三生空间演化博弈下的韧性生态空间仿真优化配置与分类管控机制”(41971249)。
关键词 气候 植被净初级生产力 滞后性 天津市 climate vegetation net primary production(NPP) lag Tianjin City
  • 相关文献

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部