LIU Shanlin,LI Chunjing.Dynamic evolution of vegetation NPP and its relationship with climatic factors in Jilin Province[J].Journal of Yanbian University,2023,(04):378-384.
吉林省植被NPP的动态演变及其与气候因子的相关性
- Title:
- Dynamic evolution of vegetation NPP and its relationship with climatic factors in Jilin Province
- 文章编号:
- 1004-4353(2023)04-0378-07
- 分类号:
- K903
- 文献标志码:
- A
- 摘要:
- 根据吉林省的MOD17A3数据,采用趋势分析和相关性分析等方法研究了2000 — 2021年吉林省植被净初级生产力(NPP)的动态演变特征及其与气候因子的相关性,并采用重标极差(R/S)分析方法预测了吉林省植被NPP的未来变化趋势.研究表明:在时间尺度上, 2000 — 2021年吉林省植被NPP的年际变化呈缓慢波动性增长趋势,不同土地覆盖类型的年均植被NPP存在明显的差异,其中森林最高(626.95 gC/(m2?a)),裸地最低(170.85 gC/(m2?a)); 在空间格局上,植被NPP由吉林省西北部向东南部呈逐渐递增趋势,且整体变化趋势以增加为主,其中呈极显著增加和显著增加趋势的区域占吉林省总面积的45.41%; Hurst指数小于0.5的区域占吉林省总面积的61.15%, 植被NPP的未来变化以反持续特征为主; 植被NPP与太阳辐射、降水量之间的相关关系大于其与温度的相关关系.该研究可为吉林省的生态管理和保护提供参考.
- Abstract:
- Based on MOD17A3 data of Jilin Province, the dynamic evolution characteristics of vegetation net primary productivity(NPP)and its correlation with climate factors during 2000 - 2021 were studied by trend analysis and correlation analysis, and the future change trend of vegetation NPP in Jilin Province was predicted by using R/S analysis.The results show that the interannual variation of vegetation NPP in Jilin Province from 2000 to 2021 presents a slow and fluctuating growth, in terms of time scale and the average annual vegetation NPP of different land cover types is significantly different, among which forest is the highest(626.95 gC/(m2?a))and bare land is the lowest(170.85 gC/(m2?a)).In terms of spatial pattern, vegetation NPP gradually increased from the northwest to the southeast of Jilin Province, and the overall change trend was mainly increase, and the areas with extremely significant increase and significant increase trend accounted for 45.41% of the total area of Jilin Province.The area with Hurst index less than 0.5 accounted for 61.15% of the total area of Jilin Province, and the future change of vegetation NPP was mainly characterized by anti - persistence.The correlation between vegetation NPP and solar radiation and precipitation is greater than that between vegetation NPP and temperature.The results can provide references for ecological management and protection in Jilin Province.
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备注/Memo
收稿日期: 2023-06-22
基金项目: 中国科学院东北地理与农业生态研究所项目(413090011)
第一作者: 刘山林(1998—),男,硕士研究生,研究方向为自然地理学.
通信作者: 李春景(1966—),女(朝鲜族),博士,副教授,研究方向为自然地理学.