1982—2015年云南省植被时空变化及其影响因子研究

Study on Spatial and Temporal Change of Vegetation and Its Impact Factors in Yunnan Province during 1982—2015

基于长时间序列遥感数据、气象数据和社会经济数据,并应用Pearson相关分析和地理加权回归等方法分析了自然与人为因素对云南省植被变化影响的时空差异.结果表明:1) 1982—2015年云南省植被覆盖度呈增加趋势;在空间上,云南省西南部是植被覆盖高值聚集区,东北部是植被覆盖低值聚集区;2)云南省植被变化与气象因素在年际变化上无显著相关性,但在空间上具有较高的一致性; 3)气温和降水对植被生长具有促进作用,人口增加将抑制植被生长.

The paper analyzed spatial and temporal differences between natural and anthropic factors on vegetation change with Pearson correlation analysis and GWR models,based on the long time serial remote sensing images,meteorological data and socio-economic data.The results are as follows:1)At the scale of time,the vegetation coverage of Yunnan province has increased in1982-2015.In terms of spatial scale,the southwest Yunnan province is a high value accumulation area of vegetation coverage,while the northeast Yunnan province is a low value accumulation area;2)There is no significant correlation between vegetation change and meteorological factors in inter-annual change in Yunnan province,but there is a high consistency in spatial distribution;3)Temperature and precipitation have an active impact on the growth of vegetation,but there will be a negative effect on vegetation when population increase