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生态学杂志 ›› 2021, Vol. 40 ›› Issue (8): 2410-2420.doi: DOI: 10.13292/j.1000-4890.202108.030

• 研究报告 • 上一篇    下一篇

内蒙古地区极端气候变化及其对植被净初级生产力的影响

任晋媛,佟斯琴*,包玉海,郭晓萌   

  1. (内蒙古师范大学地理科学学院,遥感与地理信息系统重点实验室, 呼和浩特 010022)
  • 出版日期:2021-08-10 发布日期:2021-08-16

Changes of extreme climate and its effect on net primary productivity in Inner Mongolia.

REN Jin-yuan, TONG Si-qin*, BAO Yu-hai, GUO Xiao-meng   

  1. (College of Geographical Science, Inner Mongolia Key Laboratory of Remote Sensing & Geography Information System, Inner Mongolia Normal University, Hohhot 010022, China).
  • Online:2021-08-10 Published:2021-08-16

摘要: 内蒙古是我国北方重要生态安全屏障,探讨极端气候的变化及其对植被净初级生产力的影响,对气候灾害预防和生态保护有重要意义。基于内蒙古地区的气温、降水资料和MODIS NPP数据,利用线性趋势分析法、GIS应用分析以及相关分析等方法对内蒙古地区极端气温和极端降水事件时空变化特征及其对NPP的影响进行分析。结果表明:极端高温指数和极端降水指数均表现为上升趋势,而极端低温指数呈下降趋势;2000—2017年内蒙古地区年NPP呈显著增加趋势,且东部地区增加幅度最大;内蒙古地区的NPP受极端降水的影响比极端气温明显,且极端降水对不同植被类型的影响大小依次为荒漠草原、典型草原、灌丛、戈壁荒漠、沙地植被和农作物。

关键词: 极端气温, 极端降水, NPP, 内蒙古地区

Abstract: Inner Mongolia is an important ecological security barrier for northern China. It is of great significance to understand the changes of extreme climate and its impacts on the net primary productivity (NPP) for the prevention of climate disasters and ecological protection. In this study, based on temperature and precipitation data and MODIS NPP data in Inner Mongolia, the temporal and spatial variations of extreme temperature and precipitation events and their effects on NPP were analyzed using linear trend analysis, GIS and correlation analysis. The results showed that the indices of both extreme high temperature and extreme precipitation showed an upward trend, while the index of extreme low temperature witnessed a downward trend. From 2000 to 2017, the annual NPP of Inner Mongolia increased significantly, with the greatest increase in eastern regions. The NPP in Inner Mongolia was more affected by extreme precipitation than extreme temperature, with the influence of extreme precipitation depending on vegetation types. Specifically, the extreme precipitation event had the greatest impacts on desert steppe, followed by typical steppe, shrubland, gobi desert, sandy vegetation, and field crops.

Key words: extreme temperature, extreme precipitation, net primary productivity, Inner Mongolia.