2000—2020年吉林省植被NPP时空演变及其与气温、降水的关系分析  

Spatial and Temporal Evolution of NPP and Its Relationship with Temperature and Precipitation in Jilin Province from 2000 to 2020

作　　者：马云飞 高枞亭[1,2,3] 吴玉洁 吴迪[1,2,3] 高岩 许翔驰 Ma Yunfei;Gao Zongting;Wu Yujie;Wu Di;Gao Yan;Xu Xiangchi(Jilin Institute of Meteorological Sciences,Changchun 130062,China;Jilin Key Laboratory of Changbai Mountain Meteorology and Climate Change,Changchun 130062,China;Science and Technology Innovation Center of Agricultural Meteorological Disaster Risk Assessment and Prevention and Control of Jilin Province,Changchun 130062,China)

机构地区：[1]吉林省气象科学研究所,长春130062 [2]长白山气象与气候变化吉林省重点实验室,长春130062 [3]吉林省农业气象灾害风险评估与防控科技创新中心,长春130062

出　　处：《气象与环境科学》2024年第6期65-74,共10页Meteorological and Environmental Sciences

基　　金：国家自然科学基金国际(地区)合作与交流项目(41661144007)。

摘　　要：探究植被净初级生产力(NPP)时空分布格局及气候因素响应特征,对全球变暖背景下吉林省生态环境保护和碳源/汇评价至关重要。对2000—2020年吉林省植被生长季NPP时空变化特征及其对气候因子的相关性逐像元分析结果表明,吉林省植被NPP具有较明显的空间分异性,总体呈西—中—东逐步递增分布态势,2000—2020年NPP呈波动上升的年际变化趋势,各生态功能区NPP表现为东部森林生态区的>中部农田生态区的>西部草原湿地生态区的。植被NPP的Hurst指数范围在0.23~0.74,未来变化趋势具有较强同向持续特征,植被生长状态整体向好。吉林省植被NPP具有显著的正向空间自相关性,冷热点分布出现了一定程度的极化现象,冷点区域相对稳定,东部热点区域范围年际变化明显。NPP年际差异的空间格局主要是H-H型和L-L型团状集聚分布。吉林省植被NPP主要受降水影响,干旱区与降水呈显著正相关,东部以南水资源丰沛区多为负相关,NPP与气温相关性较弱。去趋势后的相关性分析更能剔除气候因素外的干扰,从而更真实地探究NPP与各气候因素内部年际变化之间的关系。Exploring the spatial and temporal distribution pattern of net primary productivity(NPP)and the response characteristics of climatic factors is very important for the ecological environment protection and carbon source/sink evaluation in Jilin Province under the background of global warming.This paper analyzes the spatio-temporal variation characteristics of NPP in the vegetation growing season in Jilin Province from 2000 to 2020 and its correlation with climatic factors pixel by pixel.The results show that,in Jilin Province,vegetation NPP has obvious spatial differentiation,and the overall distribution trend is gradually increasing from the west to the middle to the east.From 2000 to 2020,the NPP has an inter-annual variation trend of fluctuating and rising.The NPP of each ecological function area is that the eastern forest ecological area>the central farmland ecological area>the western grassland wetland ecological area.The Hurst index of vegetation NPP ranges from 0.23 to 0.74,and the future change trend has a strong co-directional continuous feature,with the vegetation growth state being generally positive.The vegetation NPP in Jilin Province has a significant positive spatial autocorrelation,and the distribution of cold and hot spots has a certain degree of polarization.The cold spots are relatively stable,but the hot spots in the eastern part of Jilin have obvious inter-annual changes.The spatial pattern of inter-annual differences in NPP is mainly H-H type and L-L type cluster distribution.In Jilin Province,vegetation NPP is mainly affected by precipitation.The arid area has a significant positive correlation with precipitation,and the south to the eastern part is mostly negatively correlated to abundant water resources.The vegetation NPP is weakly correlated to temperature.The correlation analysis after de-trending can eliminate the interference other than climatic factors and thus can more truly explore the relationship between NPP and the inter-annual variation of each climate factor.

关 键 词：吉林省 净初级生产力(NPP) 时空变化 气候因子 

分 类 号：Q948.112[生物学—植物学]