DAI Renli,ZHONG Jiusheng,HE Zhiyuan,et al.Synergistic Effects of Climate Factors on Vegetation Coverage in Guizhou Province[J].Research of Soil and Water Conservation,2022,29(03):262-268.
气候因子对贵州省植被覆盖度的协同影响
- Title:
- Synergistic Effects of Climate Factors on Vegetation Coverage in Guizhou Province
- 文章编号:
- 1005-3409(2022)03-0262-07
- 关键词:
- 归一化植被指数(NDVI); 趋势分析; 协同影响; 贵州省
- Keywords:
- normalized difference vegetation index(NDVI); trend analysis; synergistic impact; Guizhou Province
- 分类号:
- Q948
- 文献标志码:
- A
- 摘要:
- 探究气候因子对植被覆盖度的协同影响,可进一步了解植被生长状态及演变规律,为科学预估植被变化及生态保护提供一定依据。基于2001—2018年MODIS NDVI数据和气象台站数据,研究了贵州省气候因子(降水、气温)与植被生长期NDVI的空间分布特征; 利用偏相关分析法和多元回归分析法逐像元探究贵州省植被生长期的NDVI与气候因子的相关性和其对气候因子的协同响应规律,同时结合地貌类型分析不同地貌类型的植被NDVI对降水和气温的敏感性。结果表明:贵州省多年平均降水和气温存在明显的空间差异性,降水空间分布自西北向东南呈带状递增; 植被生长期NDVI均值总体呈波动上升趋势,以每年0.004 2的速率增加,呈增加趋势的面积约为160 836.69 km2; 气温和降水对贵州省植被生长均具有明显影响,气温的影响作用大于降水; 不同地貌类型的植被NDVI对降水和气温的敏感性不同,同一地貌类型的植被NDVI对降水、气温敏感性表现为气温大于降水。整体上,贵州省植被生长期NDVI呈增加趋势,植被覆盖不断增加,降水和气温对植被的协同影响在不同地理环境区域表现不同。
- Abstract:
- Exploring the synergistic effects of climate factors on vegetation coverage can further understand the growth state and evolution patter of vegetation, and provide a certain basis for scientific estimation of vegetation change and ecological protection. Based on MODIS NDVI data and meteorological station data from 2001 to 2018, the spatial distribution characteristics of climate factors(precipitation, air temperature)and NDVI during vegetation growth period in Guizhou Province were studied. Partial correlation analysis and multiple regression analysis were used to explore the correlation between NDVI of vegetation growth period and climate factors and its synergistic response to climate factors in Guizhou Province pixel by pixel. At the same time, the sensitivity of NDVI of vegetation of different geomorphic types to precipitation and air temperature was analyzed based on geomorphic types. The results show that annual mean precipitation and temperature presented obvious spatial differences between in Guizhou Province, and the spatial distribution of precipitation increased in a zonal pattern from northwest to southeast; the average NDVI in vegetation growth period showed a fluctuating increasing trend on the whole, with the rate of 0.042 per year, and the area with an increasing trend was about 160 836.69 km2; both air temperature and precipitation had significant effects on vegetation growth in Guizhou Province, and the effect of air temperature was greater than that of precipitation; vegetation NDVI of different geomorphic types had different sensitivities to precipitation and air temperature; for the same geomorphic type, the sensitivity of NDVI of vegetation to air temperature was higher than that of precipitation. On the whole, the NDVI of vegetation growth period in Guizhou Province showed an increasing trend, and the vegetation coverage increased continuously. The synergistic effects of precipitation and air temperature on vegetation were different in different geographical environment regions.
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备注/Memo
收稿日期:2021-05-12 修回日期:2021-06-06
资助项目:国家自然科学资助项目(41661081); 贵州省科技计划项目:黔科合平台人才([2017]5726-56)
第一作者:代仁丽(1996—),女(彝族),贵州盘州人,硕士研究生,研究方向:地理信息系统与遥感。E-mail:1941594068@qq.com
通信作者:钟九生(1984—),男,江西兴国人,博士,副教授,研究方向:地理信息系统与遥感。E-mail:332476076@qq.com