XIANG Hengxing,WANG Yihang,JIN Ri,et al.Spatio-temporal pattern of vegetation net primary productivityand its relationship with climatic factors inYanbian prefecture from 2000 to 2015[J].Journal of Yanbian University,2017,43(03):277-282.
延边地区植被NPP时空格局与气候因子的关系
- Title:
- Spatio-temporal pattern of vegetation net primary productivity and its relationship with climatic factors in Yanbian prefecture from 2000 to 2015
- 分类号:
- K903
- 文献标志码:
- A
- 摘要:
- 基于MODIS NPP数据,利用ArcGIS 10.2空间分析模块对2000—2015年延边朝鲜族自治州植被净初级生产力(Net Primary Productivity,NPP)进行时空变化特征分析.结果表明: 1)延边州植被NPP总体呈现从南到北递减的趋势,16年的均值NPP为462 g C·m-2·a-1,年均NPP主要集中在500～700 g C·m-2·a-1之间.2)2000—2015年延边州各县市的年均N
- Abstract:
- Based on the MODIS NPP data, using ArcGIS 10.2 spatial analysis model, this paper analyzes vegetation Net Primary Productivity(NPP)on the spatiotemporal variation characteristics from 2000 to 2015 in Yanbian Korean autonomous prefecture. The results showed as follows: 1)The NPP of Yanbian vegetation showed a decreasing trend from south to north in general, and the average NPP in 16 years was 462 g C·m-2·a-1. The average annual NPP of vegetation mainly concentrated in 500-700 g C·m-2·a-1. 2)During 2000-2015, the annual average NPP in all counties and cities in Yanbian prefecture fluctuated within a certain range of values over time and had a similar trend. The fluctuation range of NPP in this 16 years is concentrated in the range of 301-722 g C·m-2·a-1, with the peaks in 2005 and 2012 and the trough in 2007. 3)NPP of 2015 in Yanbian prefecture compared with that of 2000, most of the area(99.72%)increased while only a little(0.28%)reduced. The increase of NPP is decreased from the northern and the southern parts to the middle part of Yanbian. 4)The annual average NPP had a strong correlation with sunshine hours(with a correlation coefficient of 0.688 and P<0.01), while was not significantly correlated with precipitation and air temperature.
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备注/Memo
收稿日期: 2017-03-22 *通信作者: 崔桂善(1984—),博士,讲师,研究方向为植被遥感研究.
基金项目: 国家自然科学基金资助项目(31500400); 吉林省科技厅项目(20170622018JC)