摘要
碳汇是碳循环的重要指标,掌握我国的碳源碳汇特征和总量,对实现我国碳达峰碳中和有着重要意义。文章以全国为研究区,基于MODIS NPP数据,采用最大值合成、趋势分析等方法,探究我国在2000—2022年植被NPP的时空变化特征。结果表明:(1)2000—2022年,我国NPP呈现出波动性增加的趋势,年平均增加3.11 gC/(m^(2)·a)。(2)多年平均NPP由南向北、由东至西逐渐降低,总体均值为330.96 gC/(m^(2)·a)。(3)我国23年的NPP变化趋势中,51.79%的面积为增加,显著减少的面积最小,约占总面积的0.51%。
Carbon sink is a crucial indicator of the carbon cycle and understanding the characteristics and overall quantity of carbon sources and sinks in China is of great significance for achieving the countrys carbon peak and carbon neutrality goals.In this study China is taken as the research area and based on MODIS NPP data methods such as maximum value synthesis and trend analysis are employed to explore the spatiotemporal variations of vegetation Net Primary Productivity in China from 2000 to 2022.The results indicate that 1 From 2000 to 2022 Chinese NPP exhibits a trend of fluctuating increase with an annual average increase of 3.11 gC/m^(2)·a.2 The multi-year average NPP gradually decreases from south to north and from east to west with an overall mean of 330.96 gC/m^(2)·a.3 In the 23-year trend of NPP changes in China 51.79%of the area shows an increase with the areas of significant decrease being minimal accounting for approximately 0.51%of the total area.
作者
李倩楠
王家慧
LI Qiannan;WANG Jiahui(Provincial Geomatics Centre of Jiangsu,Nanjing 210003,China;Key Lab of Natural Resources Monitoring,Department of Natural Resources of Jiangsu Province,Nanjing 210003,China)
出处
《江苏科技信息》
2025年第6期60-63,72,共5页
Jiangsu Science and Technology Information
基金
自然资源部自然资源调查监测专题技术研究和第二批技术体系试点项目
基金名称:江苏省国土空间碳排放、碳汇调查监测及核算技术体系构建探索。
关键词
净初级生产力
最大值合成
时空变化
定量分析
net primary productivity
max value composites
spatial change
quantitative assessment
